78P2344-IEL

78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator DATA SHEET JULY 2005 DESCRIPTION The 78P2344JAT is a low-power, 4-port DS3/E3/STS1 Line Interface Unit (LIU) with integrated Jitter Attenuator (JAT). It includes all the required clock recovery and transmitter pulse shaping functions for applications using 75-ohm coaxial cable at distances up to 1350 feet. These applications include DSLAMs, T1,3/E1,3 digital multiplexers, SONET Add/Drop multiplexers, PDH equipment, DS3 to Fiber optic and microwave modems and ATM WAN access for routers and switches. The receiver recovers clock and data from a B3ZS or HDB3 coded AMI signal. It can compensate for over 12dB of cable and 6dB of flat loss. The transmitter generates a signal that meets the standard pulse shape requirements. The 78P2344JAT includes optional B3ZS/HDB3 ENDEC with a receive line code violation detector, loop-back modes, Loss of Signal detector, clock polarity selection, and the ability to receive a DSX3 monitor signal. FEATURES • • • • • • • • • • • • • • • Transmit and receive interfaces for E3, DS3 and STS-1 applications Designed for use with 75 ohm coaxial cable lengths up to 1350 ft Receives DS3-high and DSX3 monitor signals Local and Remote loopbacks Selectable B3ZS/HDB3 ENDEC with line code violation detector Standards-based LOS detector Optional serial-port based mode selection and channel status monitoring Adaptive digital clock recovery (uses line-rate reference clock input) Receive output clock maintains nominal line-rate frequency at all times Fully integrated Jitter Attenuation function provided for all line rates (no external VCXO required) Jitter Attenuator configurable for transmit or receive path Transmit line fault monitor Requires no external current-setting resistor or loop filter components Single 3.3V supply operation Available in 100-pin Exposed Pad JEDEC LQFP STANDARDS • • • • Telcordia GR-499-CORE and GR-253-CORE ITU-T G.823, G.824, G.775, and G.703 ETSI TBR-24, ETS 300 686, ETS 300 687, and ETS EN 300 689 ANSI T1.102-1993, T1.231-1997, T1.404-1994, and T1.105.03b BLOCK DIAGRAM Controls Flags RLBK LBO E3 DS3 TXEN TPOS TNEG TCLK Jitter Attenuator RPOS RNEG RCLK B3ZS / HDB3 Decoder B3ZS / HDB3 Encoder Transmit Monitor TXNW Pulse Shaper LOUTP LOUTN Attenuator ENDEC Data Detector Adaptive Equalizer AGC LINP LINN MON TCLKP RCLKP Power Distribution Clock Recovery Signal Detector LLBKA LLBKB Signals from Adjacent Port LOS PDTX PDRX CKREF Each Channel CS SCK SDI SDO Control Registers Master Bias Generator CKREF Page 1 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator FUNCTIONAL DESCRIPTION The 78P2344JAT contains all the necessary transmit and receive circuitry for connection between E3, DS3, or STS-1 line interfaces and digital Framer/Mapper ICs. OPERATING RATE The Master Control Register (MSCR) determines which mode the device operates in according to the table below. The MSL0 pin is also provided for mode selection in applications without a serial control interface. Upon power-up or reset, the state of the MSL0 pin is sensed and mapped into the DS3 and E3 register bits representing the appropriate mode of operation. After power-up/reset, the state of the MSL0 pin is ignored. Standard E3 DS3 STS-1 STS-1 MSL0 pin L H Z Z DS3 bit 0 1 0 1 E3 bit 1 0 0 1 The jitter tolerance of 78P2344JAT meets the requirements of ITU-T G.823 for E3 rates; the requirements of ITU-T G.824 and Telcordia GR-499 (Cat I and II) for DS3 rates; and the requirements of Telcordia GR-253 for STS1 rates. With the Jitter Attenuator disabled, the jitter transfer function meets the requirements of GR-499 for Category II DS3 interfaces. When the Jitter Attenuator is enabled, the 78P2344JAT meets the requirements of GR-499 and GR-253 for all categories of DS3/STS1 equipment and the ETSI TBR-24 requirements for E3 rates. To check conformance with other standards, please refer to the JITTER ATTENUATOR TRANSFER FUNCTION section for more detailed info. RECEIVER MONITOR MODE W hen in monitor mode, 20dB of flat gain is applied to the incoming signal before it is fed to the receive equalizer. This mode is controlled by the MON bit in the Mode Control Register. SIGNAL DETECT W hen the received signal is below a minimum threshold, the corresponding LOS signal (bit) is asserted. A time delay is provided before this output is active so that transient interruptions do not cause false indications. The LOS signal can also be used to trigger an interrupt on the INTRx pin when serial interface control is not available. This is controlled by setting the RXER bit in the Interrupt Control Register (INTC). Note: In DS3 or STS-1 mode, when LBO is not enabled, the transmitters have to be properly terminated to ensure reliable LOS detection. If a transmitter is not terminated, the resultant 2x signal is large enough to couple to the neighboring receivers through the ESD diodes, causing false Signal Detect indication. RECEIVER OPERATION The receiver input is either transformer-coupled or capacitor-coupled to the line signal. In applications where the highest performance and isolation are required, a 1:1 transformer is used in the receive path. In applications where isolation is provided elsewhere in the circuit, capacitor coupling can be used. The receiver input should be line terminated externally with a termination resistor. The AMI signal first enters an AGC, which has a selectable gain range setting. In normal operation, the AGC can compensate for signals with up to 6dB of flat loss. When Receiver Monitor Mode is enabled, the AGC can compensate for a DSX3 monitor signal with 16 to 20 dB of flat loss. The signal then enters a high performance adaptive equalizer. The equalizer is designed to overcome inter-symbol interference caused by long cable lengths. Because the equalizer is adaptive, the circuit will work with all square-shaped signals such as DS3-high or 34.368 Mbit/s E3. The variable gain differential amplifier automatically controls the gain to maintain a constant voltage level output regardless of the input voltage level. Page 2 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator LOCAL LOOPBACK AND REDUNDANCY MUX Each receiver has a 4-input MUX as shown in the adjacent figure. In multiport applications where redundant channels are required, the receiver MUX can be configured to provide the necessary multiplexing functions. This allows the user to use one port as a redundant monitor for the other port. The tables below show the register settings for selecting the desired receiver input source. LLBKA (Port 1) 0 0 1 1 LLBKA (Port 2) 0 0 1 1 LLBKA (Port 3) 0 0 1 1 LLBKA (Port 4) 0 0 1 1 LLBKB (Port 1) 0 1 0 1 LLBKB (Port 2) 0 1 0 1 LLBKB (Port 3) 0 1 0 1 LLBKB (Port 4) 0 1 0 1 Receiver #1 Input Source LINP1/LINN1 LOUTP1/LOUTN1 LINP2/LINN2 LOUTP2/LOUTN2 LOUTP3, LOUTN3 LOUTP1, LOUTN1 Transmitter #1 00 01 10 11 LINP1, LINN1 Receiver #1 LLBKA,B(1) LOUTP2, LOUTN2 Transmitter #2 00 01 10 11 LINP2, LINN2 Receiver #2 LLBKA,B(2) Receiver #2 Input Source LINP2/LINN2 LOUTP2/LOUTN2 LINP1/LINN1 LOUTP1/LOUTN1 Transmitter #3 00 01 10 11 LINP3, LINN3 Receiver #3 LLBKA,B(3) LOUTP4, LOUTN4 Receiver #3 Input Source LINP3/LINN3 LOUTP3/LOUTN3 LINP4/LINN4 LOUTP4/LOUTN4 Receiver #4 Input Source LINP4/LINN4 LOUTP4/LOUTN4 LINP3/LINN3 LOUTP3/LOUTN3 Transmitter #4 00 01 10 11 LINP4, LINN4 Receiver #4 LLBKA,B(4) W hen serial interface control is not available, the respective LPBKx pin for each of the channels can also be used to activate local loopback mode as shown below. Note that redundant channel modes can only be activated using the serial interface. LPBKx pin L Z H Loopback Mode Normal Operation Same as LLBKA,B = ‘00’ Remote (Digital) Loopback Same as RLBK = ‘1’ Local (Analog) Loopback Same as LLBKA,B = ‘01’ Note: The LLBKA and LLBKB bits are located in the Mode Control Register (MDCR). The Register Control bit, REGEN, should be enabled when using the register settings to avoid conflict with external loopback setting pins. Page 3 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator B3ZS/HDB3 ENDEC WITH LINE CODE VIOLATION DETECT The 78P2344JAT includes a selectable B3ZS/HDB3 Encoder/Decoder (ENDEC). The ENDEC function can be enabled or disabled through pin selection or register setting as shown below. ENDECB bit/pin 0/L 1/H RPOSx NRZ data Positive AMI RNEGx Receive Line Code Violation Indicator Negative AMI On the transmit side, when the ENDEC is enabled, NRZ input data is encoded to Positive and Negative AMI logic data following the B3ZS (for DS3/STS-1) or HDB3 (for E3) substitution codes. The NRZ data is input to the TPOS pin as shown below: ENDECB bit/pin 0/L 1/H TPOSx NRZ data Positive AMI TNEGx ‘Don’t Care’ Negative AMI TRANSMITTER OPERATION Transmitters 1-4 are enabled by their corresponding TXEN bit. When enabled, each transmitter accepts logic level clock and data signals and generates current pulses on the LOUTPx and LOUTNx pins. When properly connected to a 1:2CT center-tapped transformer, a standards compliant AMI pulse is generated which can drive a 75Ω coaxial cable. When the recommended transformer is used and when DS3 mode is selected, the transmitted pulse shape at the end of the 75Ω terminated cable of 0 to 450 feet will fit the DS3 template found in ANSI T1.102-1993 and Telcordia GR-499-CORE. For STS-1 applications, the transmitted pulse for a short cable meets the requirements of Telcordia GR-253CORE. For E3 applications, the transmitted pulse for a short cable meets the requirements of ITU-T G.703. In either DS3 and STS-1 modes, the LBOx pin or LBO bit should be set high for short cable (< 225 ft), and should be set low for long cable (> 225 ft). The LBO settings are ignored in E3 mode. RCLK/TCLK POLARITY REVERSAL To simplify the interface with various framer circuitry, TCLK polarity can be internally inverted by setting the TCLKP bit, and RCLK polarity can be inverted by setting the RCLKP bit. Both bits are located in the Master Control Register (MSCR). REMOTE (DIGITAL) LOOPBACK W hen the Register Control bit, REGEN, is disabled and the LPBKx pin is floating; or when the Register Control bit, REGEN, is enabled and the RLBK bit is set, RCLKx, RNEGx, and RPOSx outputs are internally looped back to the TCLKx, TNEGx, and TPOSx inputs respectively. W hen the ENDEC is enabled, the decoder generates a composite NRZ logic data stream following the B3ZS (for DS3/STS-1) or HDB3 (for E3) substitution codes via the RPOSx pins: The decoder also detects Receive Line Code Violations (RLCV) and outputs a pulse via the RNEG pin. Three different classes of line code violations are detected. 1) Too many zeros: More than two (three) consecutive zeros in B3ZS (HDB3) mode. 2) Not enough zeros between bipolar pulse (B) and bipolar violation pulse (V): (B,V) for B3ZS. (B,V) or (B,0,V) for HDB3. 3) Code violation: Even number of bipolar pulses (B) detected between bipolar violation pulses (V). When the ENDEC is disabled, the 78P2344JAT outputs a dual rail data stream via the RPOSx and RNEGx pins. In this mode, the Framer/Mapper providing the ENDEC function typically detects Line Code Violations. Page 4 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator LINE BUILD-OUT The Line Build-Out (LBO) function controls the transmit amplitude and pulse shape in DS3 and STS-1 modes. The selection of LBO depends on the amount of cable the transmitter is connected to. When less than 225 ft of cable is used, the corresponding LBOx pin or LBO bit should be high. When 225ft or more cable is used the corresponding LBO setting (LBOx pin or LBO bit) should be low. LBO can be controlled either from pins or from register settings, depending on the status of the Register Control bit, REGEN. TRANSMIT ENABLE The TXEN bit in the Mode Control Register controls the transmitter output. When logic zero, the transmitter output is disabled. This feature is used to disable ports as well as to multiplex two or more transceivers to one port. The transmitter of any port can also be disabled by floating the respective LBOx pin, in which case it will also power-down the entire transmitter. See section on the Power-Down Function for more info. TRANSMIT MONITOR The transmit monitor function detects activity on the transmitter output at the LOUTPx and LOUTNx pins. When there is a transmitter fault, in the case of an open or short on the chip, the transformer, or the circuit board, the transmit signal amplitude will be altered. The transmit monitor detects the amplitude of the driven signal. The TXNW signal (bit) goes high when the amplitude of the transmit signal is outside a valid amplitude range. When the signal amplitude is either too high or too low for longer than a specified duration, the TXNW bit goes high (See Transmit Monitor Specifications, pg.28). The TXNW signal can be also used to trigger an interrupt on the INTRx pin when serial interface control is not available. JITTER ATTENUATOR Jitter Attenuation function is provided on-chip. The Jitter Attenuator can be configured to be in the transmit or the receive path. When configured in the transmit path, the input clock at TCLK pin is passed through a very low bandwidth digital PLL. The corresponding transmit data is buffered into a FIFO and clocked out using the de-jittered output clock of the PLL. When configured in the receive path, the recovered clock is passed through the low bandwidth digital PLL, and the corresponding receive data is buffered into the FIFO and clocked out using the de-jittered clock. W hen serial interface control is not available, the MSL1 pin is provided for global Jitter Attenuator mode selection. Upon power-up or reset, the state of the MSL1 pin is sensed and mapped into the JAEN and JASL register bits for all channels, representing the appropriate mode of operation. After power-up or reset, the state of the MSL1 pin is ignored. The state of the MSL1 pin, and the corresponding Jitter Attenuator configuration is shown below. MSL1 pin L H Z PLL Bandwidth A PLL response with effectively one pole below 27 Hz is adequate to meet the ETSI TBR24 E3 standards. A PLL response with one pole below 40 Hz is adequate to meet the GR-499 (Cat I) DS3 standards. One of two bandwidths can be selected via register settings. The PLL bandwidth is proportional to the data rate as follows: Line Rate E3 DS3 STS1 JABW bit 0 1 0 1 0 1 PLL Bandwidth (Hz) *13 188 *17 245 20 *283 Jitter Attenuator Mode Jitter Attenuator in receive path Jitter Attenuator in transmit path Jitter Attenuator disabled The Jitter Attenuator can be configured independently for each channel by writing to the Jitter Attenuator Control Register (JACR) as follows: JAEN bit 0 1 1 JASL bit X 0 1 Jitter Attenuator Mode Jitter Attenuator disabled Jitter Attenuator configured to be in the receive path Jitter Attenuator configured to be in the transmit path * The default state of the JABW bit depends on which line-rate is selected through the MSL0 pin. If E3 or DS3 mode is selected, the default state is ‘0’. If STS1 mode is selected, the default state is ‘1’. Rev 2.2 Page 5 of 37 2005 Teridian Semiconductor Corporation 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator Elastic Store Depth To optimize the trade-off between data latency and clock wander tolerance, the FIFO elastic store depth can be selected through the serial port by writing to the Jitter Attenuator Control Register (JACR) as follows: ESP[1:0] bits 00 01 10 11 Elastic Store Depth Pass-Through mode 16 UI 32 UI 64 UI (default) SERIAL CONTROL INTERFACE The serial port controlled register allows a generic controller to interface with the 78P2344JAT. It is used for mode settings, diagnostics and test, and the retrieval of status and performance information. The serial interface consists of four pins: Chip Select (CS), Serial Clock (SCK), Serial Data In (SDI), and Serial Data Out (SDO). The CS pin initiates the read and write operations. It can also be used to select a particular device allowing SCK, SDI and SDO to be bussed together. SCK is the clock input that times the data on SDI and SDO. Data on SDI is latched in on the rising-edge of SCK, and data on SDO is clocked out using the falling edge of SCK. SDI is used to insert mode, address, and register data into the chip. Address and Data information are input least significant bit (LSB) first. SDO is a tristate capable output. It is used to output register data during a read operation. SDO output is normally high impedance, and is enabled only during the duration when register data is being clocked out. Read data is clocked out least significant bit (LSB) first. If SDI coming out of the micro-controller chip is also tristate capable, SDI and SDO can be connected together to simplify connections. The maximum clock frequency for register access is 20MHz. Note: To allow equipment to power up in a known state, some register defaults are set by their corresponding pin control at power-up. The Elastic Store Depth selects the nominal FIFO read pointer address. The total or maximum elastic store depth is set to be twice as deep as the nominal pointer address. The circular buffer length is always twice as long as the nominal pointer address. POWER-DOWN FUNCTION Power-down control is provided to allow the transceivers to be shut off individually. Transmit and receive power-down can be set independently via the PDTX and PDRX bits in the Mode Control Register. Floating the respective LBOx pin can also set PDTX for each channel. The Serial Control Interface and Configuration Registers are not affected by power-down. INTERNAL POWER-ON RESET The 78P2344JAT includes on-chip Power-On Reset (POR) function to ensure the serial-port registers are initialized to known default states upon power-up. Roughly 50us after Vcc reaches 2.4V at power up, reset is released. This reset signal also sets all state machines within the LIU to nominal operational states. The internal reset signal is also brought out to the PORB pin. This pin is a multi-function pin that allows for the following: 1) Override the internal POR signal by driving in an external active-low reset signal; 2) Monitor the state of the internal POR signal (for test and debug only); 3) Add external capacitor to delay the release of the internal power-on reset signal to allow the MSL0 pin to stabilize prior to release of reset (approximately 8µs per nF added). The internal resistance of the PORB pin is approximately 5kΩ. Page 6 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION REGISTER ADDRESSING Address Bits Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Sub-Address PA[0] SA[2] SA[1] SA[0] Bit 1 Bit 0 Read/ Write R/W* Port Address Assignment PA[3] PA[2] PA[1] REGISTER TABLE a) PA[3:0] = 0 : Global Registers Sub Addr 0 1 2 3 4 5 6 7 Reg. Name MSCR (R/W) INTC (R/W) RSVD RSVD RSVD RSVD RSVD RSVD Description Master Control Interrupt Control Reserved Reserved Reserved Reserved Reserved Reserved Bit 7 REGEN INPOL - -- Bit 6 DS3 -- -- Bit 5 E3 -- -- Bit 4 ENDECB -- -- Bit 3 RCLKP -- -- Bit 2 TCLKP JAER - -- Bit 1 -RXER - -- Bit 0 SRST TXER - -- b) PA[3:0] = 1-4 : Port-Specific Registers Sub Addr 0 1 2 3 4 5 6 7 Reg. Name MDCR (R/W) STAT (R/O) RSVD JACR (R/W) RSVD RSVD RSVD RSVD Description Mode Control Status Monitor Reserved Jitter Attenuator Control Reserved Reserved Reserved Reserved Bit 7 PDTX FERR JAEN - - Bit 6 PDRX - JASL --- Bit 5 LBO - JLBK --- Bit 4 LLBKA - - - Bit 3 LLBKB LOS ESP[1] - - Bit 2 RLBK TXNW ESP[0] - - Bit 1 MON - - - Bit 0 TXEN SGLO JABW - - Note: Shaded registers in Register Table are reserved for Teridian internal use only. Accessing reserved or undefined registers may cause undesirable operation. Page 7 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION (continued) LEGEND TYPE R/O DESCRIPTION Read only TYPE R/W DESCRIPTION Read or Write GLOBAL REGISTERS ADDRESS 0-0: MASTER CONTROL REGISTER BIT NAME TYPE DFLT VALUE DESCRIPTION Register Control Enable: 0 : Pin selection overrides register settings 1 : Device is controlled via register set. NOTE: Pin 15 (ENDECB) must be tied low when REGEN is enabled. Line Speed Selection: Selects the line speed of all channels as well as the input clock frequency at the CKREF pin. [DS3 E3] = 00 : STS-1 (51.840MHz) 01 : E3 (34.368MHz) 10 : DS3 (44.736MHz) 11 : STS-1 (51.840MHz) NOTE: The default values of these register bits depend on the state of the MSL0 pin upon power-up or reset. Encoder/Decoder Disable: 0 : selects NRZ digital data interface 1 : selects AMI digital data interface NOTE: Relevant only when the REGEN bit is set. Otherwise, ENDECB pin selection prevails. RCLK Polarity Selection: 0 : Receive Data clocked out on the falling-edge of RCLK 1 : Receive Data clocked out on the rising-edge of RCLK TCLK Polarity Selection: 0 : Transmit Data clocked in on the rising-edge of TCLK 1 : Transmit Data clocked in on the falling-edge of TCLK Reserved Register Soft-Reset: When this bit is set, all registers are reset to their default values. Also resets Jitter Attenuator to “centered” states. This register bit is selfclearing. 7 REGEN R/W 0 6 DS3 R/W X 5 E3 R/W X 4 ENDECB R/W 0 3 RCLKP R/W 0 2 TCLKP R/W 0 1 RSVD R/O -- 0 SRST R/W 0 Page 8 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION (continued) ADDRESS 0-1: INTERRUPT CONTROL REGISTER This register selects the events that would cause the respective interrupt pin (INTRx) for each of the ports to be activated. User may set as many bits as required. BIT NAME TYPE DFLT VALUE 0 DESCRIPTION Interrupt Pin Polarity Selection: 0 : Interrupt output is active-low 1 : Interrupt output is active-high Reserved Jitter Attenuator Error Event: When set, JAT FIFO overflow or underflow (as indicated by the FERR bit) will cause an interrupt to be flagged. Receiver Error Event: When set, loss of receive signal (as indicated by the LOS bit) will cause an interrupt to be flagged. Transmitter Error Event: When set, transmitter fault (as indicated by the TXNW bit) will cause an interrupt to be flagged. 7 INPOL R/W 6:3 RSVD R/O -- 2 JAER R/W 0 1 RXER R/W 1 0 TXER R/W 1 Page 9 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION (continued) PORT-SPECIFIC REGISTERS For PA[3:0] = N = 1-4 only. Accessing a register with port address greater than 4 constitutes an invalid command, and the read/write operation will be ignored. ADDRESS N-0: MODE CONTROL REGISTER BIT NAME TYPE DFLT VALUE DESCRIPTION Transmitter Power-Down: 0 : Normal Operation 1 : Power-Down NOTE: Relevant only when the REGEN bit is set. Otherwise, LBOx pin selection prevails. Receiver Power-Down: 0 : Normal Operation 1 : Power-Down Transmitter Line Build-Out (DS3 and STS-1 only): 5 LBO R/W 1 0 : ≥ 225ft of cable attached to the cross-connect 1 : < 225ft of cable attached to the cross-connect NOTE: Relevant only when the REGEN bit is set. Otherwise, LBOx pin selection prevails. Local (Analog) Loopback Mode Selection: [LLBKA : LLBKB] = 00 : Normal operation 01 : Local (Analog) Loopback 10 : Adjacent receiver input (see page 3) 11 : Adjacent transmitter loopback (see page 3) NOTE: Relevant only when the REGEN bit is set. Otherwise, LPBKx pin selection prevails. Remote (Digital) Loopback Enable: 0 : Normal Operation 1 : Loops RCLK, RPOS, and RNEG back onto TCLK, TPOS, and TNEG NOTE: Relevant only when the REGEN bit is set. Otherwise, LPBKx pin selection prevails. Monitor Mode Enable: Used for reception of split-off signals that are flat attenuated by at least 16dB but no more than 20dB. 0 : Disable 1 : Enable Transmitter Output Enable: 0 : Transmit driver is disabled. Output is tri-stated. 1 : Normal Operation NOTE: Relevant only when the REGEN bit is set. Otherwise, LBOx pin selection prevails. 7 PDTX R/W 0 6 PDRX R/W 0 4 LLBKA R/W 0 3 LLBKB R/W 0 2 RLBK R/W 0 1 MON R/W 0 0 TXEN R/W 1 Page 10 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION (continued) ADDRESS N-1: STATUS MONITOR REGISTER BIT NAME TYPE DFLT VALUE DESCRIPTION Jitter Attenuator FIFO Error Flag: This bit is set whenever a FIFO overflow or underflow occurred. It is reset after a read operation to this register. 0 : Proper Operation 1 : FIFO Overflow/Underflow Reserved Loss-of-Signal Indication: 0 : Signal Detector detecting a valid receive input signal 1 : Standards-based Loss-of-Signal indication NOTE: RPOSx and RNEGx are forced low when LOS=’1’. RCLK will continue to output a line rate clock Transmitter Not-Working Indication: 0 : Transmitter OK 1 : Transmitter not working Reserved Signal Low Indication: 0 : Receive signal level OK 1 : Receive signal level too low / Loss of signal 7 FERR R/O X 6:4 RSVD R/O X 3 LOS R/O X 2 TXNW R/O X 1 RSVD R/O X 0 SGLO R/O X Page 11 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REGISTER DESCRIPTION (continued) ADDRESS N-3: JITTER ATTENUATOR CONTROL REGISTER BIT NAME TYPE DFLT VALUE DESCRIPTION Jitter Attenuator Enable: 0 : Disables jitter attenuation function 1 : Enables jitter attenuation function NOTE: The default values of these register bits depend on the state of the MSL1 pin upon power-up or reset. Jitter Attenuation Selection: 0 : Jitter Attenuator on the receive path 1 : Jitter Attenuator on the transmit path NOTE: The default values of these register bits depend on the state of the MSL1 pin upon power-up or reset. Jitter Attenuator Local Loopback Enable: 0 : Normal Operation 1 : TCLKx, TPOSx, TNEGx connected to JAT input and RCLKx, RPOSx, RNEGx connected to JAT output NOTE: If both RLBK and JLBK bits are set, RLBK mode takes priority. 4 RSVD R/W 0 Reserved. Must be set to zero. FIFO Elastic Store Pointer Selection: ESP[1:0] = 00 : Pass-through 01 : 8 UI 10 : 16 UI 11 : 32 UI (default) Reserved. Must be set to zero. Jitter Attenuator Bandwidth Selection: 0 : Low bandwidth 1 : High bandwidth (see JAT Bandwidth Selection Table on page 5) NOTE: The default values of these register bits depend on the state of the MSL0 pin upon power-up or reset. If the state of the MSL0 pin selects E3 or DS3 mode, the default value of JABW is ‘0’. If the state of the MSL0 pin selects STS1 mode, the default value of JABW is ‘1’. 7 JAEN R/W X 6 JASL R/W X 5 JLBK R/W 0 3:2 ESP [1:0] R/W 11 1 RSVD R/W 0 0 JABW R/W X Page 12 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator PIN DESCRIPTION LEGEND TYPE A CI CIU CID CIS DESCRIPTION Analog Pin CMOS Digital Input CMOS Digital Input w/ Pull-up CMOS Digital Input w/ Pull-down CMOS Schmitt Trigger Input TYPE CIT CO COZ S G DESCRIPTION CMOS 3-State Input CMOS Digital Output CMOS Tristate Digital Output Supply Ground TRANSMITTER PINS NAME PIN TYPE DESCRIPTION Transmit Positive Data/Transmit NRZ: 23, 31 TPOSx 39, 47 When ENDECB =’1’, a logic one on this pin generates a positive AMI pulse on the coax. This pin should not be high at the same time that corresponding TNEGx is high. When ENDECB =’0’, data on this pin is encoded and converted into positive and negative AMI pulses. Transmit Negative Data: 24, 32 TNEGx 40, 48 CI When ENDECB =’1’, a logic one on this pin generates a negative AMI pulse on the coax. This pin should not be high at the same time that corresponding TPOSx is high. When ENDECB =’0’, this pin is ignored. 25, 33 TCLKx 41, 49 98, 92 LOUTPx 85, 79 A LOUTNx 99, 93 86, 80 Line Out: Differential AMI Outputs. Requires a 1:2CT center-tapped transformer and a shunt termination resistor. See APPLICATION INFORMATION section for more info. Transmitter Clock Input: CIS This signal is used to latch the respective TPOSx and TNEGx signals into the 78P2344JAT. CI Page 13 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator PIN DESCRIPTION (continued) RECEIVER PINS NAME PIN TYPE DESCRIPTION Reference Clock Input: 57 CIS This clock should be from a clean source (± 20 ppm) and match the selected line-rate frequency as follows: E3 : 34.368 MHz DS3: 44.736 MHz STS-1: 51.840 MHz Receive Clock: 27, 35 RCLKx 43, 51 CO Recovered receive clock output. NOTE: During LOS conditions, RCLKx will continue to output a line rate clock Receive Negative Data: 28, 36 RNEGx 44, 52 When ENDECB =’1’, this pin indicates reception of a negative AMI pulse on the coax. When ENDECB =’0’, this pin outputs a one when a Receive Line Code Violation (RLCV) is detected. NOTE: During LOS conditions, RNEGx output is squelched Receive Positive Data/NRZ Data: 29, 37 RPOSx 45, 53 CO When ENDECB =’1’, this pin indicates reception of a positive AMI pulse on the coax cable. When ENDECB =’0’, it outputs decoded NRZ data. NOTE: During LOS conditions, RPOSx output is squelched 96, 90 LINPx 83, 77 A LINNx 95, 89 82, 76 Line In: Differential AMI Inputs. Should be 1:1 transformer-coupled and terminated with a shunt resistor. See APPLICATION INFORMATION section for more info. CKREF CO Page 14 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator PIN DESCRIPTION (continued) CONTROL AND STATUS PINS NAME PIN TYPE DESCRIPTION Data-Rate Mode Selection: Low = E3 mode High = DS3 mode Float = STS-1 mode NOTE: Pin state is latched-in on rising-edge of PORB signal. Pin state is ignored after reset. Jitter Attenuator Mode Selection: Low = JAT in Receive path High = JAT in Transmit path Float = JAT is bypassed NOTE: Pin state is latched-in on rising-edge of PORB signal. Pin state is ignored after reset. Chip Reset (active-low): PORB 14 A Forces hardware reset on device. See description on Internal Poweron Reset for complete use of this pin. ENDEC Enable (active-low): 15 CID Set high to disable internal ENDEC function. See description on B3ZS/HDB3 ENDEC with Line Code Violation Detect for complete use of this pin. NOTE: Relevant only when the REGEN bit is ‘0’. Pin must be held low when the REGEN bit is set. Line Build-Out: Low = Used with 225ft or more of cable. High = Used with less than 225ft of cable. Float = Disable and power down transmitter. [TXEN=0; PDTX=1] NOTE: LBO control relevant only when the REGEN bit is ‘0’. Pin state sampled approximately once every 0.5ms. Loopback Enable: Low = Normal Operation High = Local Loopback. Transmitter looped back to Receiver Float = Remote Loopback. Receiver looped back to Transmitter NOTE: Relevant only when the REGEN bit is ‘0’. Pin state sampled approximately once every 0.5ms. Interrupt Flag: This pin is normally high when the INPOL bit is ‘0’ (default), and normally low when the INPOL bit is ‘1’. When an interrupt event occurs (as defined in the Interrupt Control Register description), the respective INTRx pin will change state. MSL0 19 CIT MSL1 20 CIT ENDECB 5, 6 LBOx 7, 8 CIT 10, 11 LPBKx 12, 13 CIT 64, 63 INTRx 62, 61 CO Page 15 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator PIN DESCRIPTION (continued) SERIAL-PORT PINS NAME PIN TYPE DESCRIPTION Chip Select: CS 65 CI High during write and read operations. Low disables the serial port. While CS is low, SDO remains in high impedance state, and SDI and SCK activities are ignored. Serial Clock: Controls the timing of SDI and SDO. Serial Data Input: SDI 68 CI Inputs mode and address information. Also inputs register data during a Write operation. Both address and data are input least significant bit first. Serial Data Output: SDO 67 COZ Outputs register information during a Read operation. Data is output least significant bit first. SCK 66 CIS POWER AND GROUND PINS It is recommended that all supply pins be connected to a single power supply plane and all ground pins be connected to a single ground plane. NAME VCC GND VCCD GNDD PINS 1, 2, 3, 4, 17, 59, 72, 73, 74, 75 18, 60, 78, 81, 84, 87, 91, 94, 97, 100 16, 22, 30, 38, 46, 54, 55, 58 9, 21, 26, 34, 42, 50, 56, 69 TYPE S S S S DESCRIPTION Analog Power Supply Analog Ground Digital Power Supply Digital Ground Page 16 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Operation beyond these limits may permanently damage the device. PARAMETER Supply Voltage (VCC/VCCD) Storage Temperature Junction Temperature Pin Voltage (LOUTPx, LOUTNx) Pin Voltage (all other pins) Pin Current RATING -0.5 to 4.0 VDC -65 to 150 °C -40 to 125 °C VCC + 1.5 VDC -0.3 to (VCC+0.6) VDC ±100 mA RECOMMENDED OPERATING CONDITIONS Unless otherwise noted all specifications are valid over these temperatures and supply voltage ranges. PARAMETER DC Voltage Supply (VCC/VCCD) Ambient Operating Temperature DC CHARACTERISTICS: PARAMETER Supply Current All channels enabled; LBO=0 Receive-only Supply Current All channels PDTX = 1 Transmit-only Supply Current All channels PDRX = 1; LBO=0 Supply Current per Port (including transmitter current through transformer) Iddx Iddt SYMBOL Idd CONDITIONS DS3/E3 mode JAT Enabled: JAT Disabled: RATING 3.0 to 3.6 V -40 to 85°C MIN NOM 350 330 MAX 380 355 UNIT mA DS3/E3 mode Iddr JAT Enabled: JAT Disabled: 155 130 170 142 mA DS3/E3 mode JAT Enabled: JAT Disabled: 260 225 mA DS3/E3 mode JAT Enabled: JAT Disabled: 82 76 mA Power-Down Current Iddq PDTX = 1, PDRX = 1 11 15 mA Page 17 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) ANALOG PINS CHARACTERISTICS: The following table is provided for informative purpose only. Not tested in production. PARAMETER LINPx and LINNx Common-Mode Bias Voltage LINPx and LINNx Differential Input Impedance PORB Input Impedance SYMBOL Vblin Rilin Ripor CONDITIONS Ground reference MIN 1.9 NOM 2.25 10 5 MAX 2.6 UNIT V kΩ kΩ DIGITAL I/O CHARACTERISTICS: Pins of type CI, CIU, CID: PARAMETER Input Voltage Low Input Voltage High Input Current Pull-up Resistance Pull-down Resistance Input Capacitance Pins of type CIS: PARAMETER Low-to-High Threshold High-to-Low Threshold Input Current Input Capacitance SYMBOL Vt+ VtIil, Iih Cin CONDITIONS MIN 1.3 0.8 -1 8 NOM MAX 1.7 1.2 1 UNIT V V µA pF SYMBOL Vil Vih Iil, Iih Rpu Rpd Cin Type CIU only Type CID only 2.0 -1 32 32 56 56 8 1 84 84 CONDITIONS MIN NOM MAX 0.8 UNIT V V µA kΩ kΩ pF Page 18 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) Pins of type CIT: PARAMETER Input Voltage Low Input Voltage High Minimum impedance to be considered as “float” state Pins of type CO and COZ: PARAMETER Output Voltage Low Output Voltage High Output Transition Time Pin Capacitance Effective Source Impedance Tristate Output Leakage Current SYMBOL Vol Voh Tt Cout Rsrc Iz Type COZ only -1 CONDITIONS Iol = 8mA Ioh = -8mA CL = 20pF; (20-80%) 8 30 1 2.4 6 MIN NOM MAX 0.4 UNIT V V ns pF Ω µA SYMBOL Vtil Vtih Rtiz 2.0 30 CONDITIONS MIN NOM MAX 0.8 UNIT V V kΩ Page 19 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) SERIAL-PORT TIMING CHARACTERISTICS: PARAMETER CS or SDI to SCK setup time CS or SDI to SCK hold time SCK to SDO propagation delay SCK Frequency SYMBOL tsu th tprop SCK CONDITION MIN 4 4 5 12 20 TYP MAX UNIT ns ns ns MHz SEN SCK tsu th tsu th SDI SDO X 1 SA0 SA1 SA2 PA0 PA1 PA2 PA3 tprop X or Z Z D0 D1 D2 D3 D4 D5 D6 D7 Z Read Operation SEN SCK tsu th tsu th SDI SDO X 0 SA0 SA1 SA2 PA0 PA1 PA2 PA3 D0 D1 D2 D3 D4 D5 D6 D7 X Z Write Operation Page 20 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) TRANSMIT TIMING CHARACTERISTICS: PARAMETER Clock Duty Cycle Setup Time Hold Time SYMBOL TTC/TTCF TTDxS TTDxH CONDITIONS MIN 40 2.5 2.5 NOM MAX 60 UNIT % ns ns TIMING DIAGRAM: Transmitter Waveforms (E3/DS3/STS-1) TTCF TCLK TCLKP=LOW TCLK TCLKP=HIGH TTDPH TTDPS TTC TPOS TTDNH TTDNS TNEG Page 21 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) RECEIVE TIMING CHARACTERISTICS: PARAMETER CKREF Duty Cycle CKREF Frequency Stability RCLK Duty Cycle Data Propagation Delay Receive Loss of Signal Assert Timing SYMBOL --TRC/TRCF TPROP E3 mode -DS3 mode STS1 mode E3 mode Receive Loss of Signal De-assert Timing -DS3 mode STS1 mode, see Note 1 w.r.t. line-rate frequency CONDITIONS MIN 40 -20 40 -0.3 10 100 2.3 10 100 2.3 140 150 3 130 130 3 NOM MAX 60 +20 60 3 255 250 100 255 250 250 UNIT % ppm % ns UI UI µS UI UI µS Note 1: At least a 100µS of software delay must be added after STS-1 LOS de-assertion to be compliant with the ANSI T1.231 requirement of 100 to 250µS. TIMING DIAGRAM: Receive Waveforms (E3/DS3/STS-1) RECEIVE LINE INPUT (REF) (LINP,LINN) TRCF TRC RCLK RCLKP=LOW RCLK RCLKP=HIGH TPROP RPOS TPROP RNEG Page 22 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) E3 – TRANSMITTER SPECIFICATIONS PARAMETER Transmitter Amplitude Transmitter Amplitude Mismatch CONDITION (see timing diagram) Measured at 0ft of terminated 75ohm cable Ratio of amplitudes of positive and negative pulses measured at pulse centers Ratio of widths of positive and negative pulses measured at pulse half amplitude Measured at 0ft of terminated 75ohm cable MIN 900 0.95 TYP 1000 MAX 1100 1.05 UNIT mVpk Transmitter Pulsewidth Mismatch Transmitter Pulsewidth 0.95 12.1 14.8 1.05 17 ns DS3 – TRANSMITTER SPECIFICATIONS PARAMETER Transmitter Amplitude CONDITION Measured at 0ft of terminated 75ohm cable with LBO pin held high (enabled). Ratio of amplitudes of positive and negative pulses measured at pulse peaks. All ones pattern, 3kHz bandwidth All ones pattern Power below fundamental at 22.368MHz MIN 700 TYP 800 MAX 850 UNIT mVpk Transmitter Amplitude Mismatch Transmitter Power at 22.368 MHz Harmonic Power at 44.736 MHz 0.9 -1.8 1.1 +5.7 -20 dBm dBm STS-1 – TRANSMITTER SPECIFICATIONS PARAMETER Transmitter Amplitude CONDITION Measured at 0ft of terminated 75ohm cable with LBO pin held high (enabled). Ratio of amplitudes of positive and negative pulses measured at pulse peaks. PRBS15 pattern band-limited to 207.36MHz. MIN 700 TYP 825 MAX 950 UNIT mVpk Transmitter Amplitude Mismatch 0.9 -2.7 1.1 +4.7 dBm Transmitter Power Page 23 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) E3 TRANSMIT PULSE TEMPLATE 17 ns 0.2 0.1 1.0 0.1 0.2 8.65 ns 14.55 ns 0.5 12.1 ns 0.1 0 0.1 0.2 24.5 ns 0.1 0.1 29.1 ns Page 24 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) DS3 TRANSMIT PULSE TEMPLATE 1.2 1 0.8 Normalized Amplitude 0.6 0.4 0.2 0 -0.2 -1 -0.5 0 Time, Unit Intervals 0.5 1 1.5 Time axis range (UI) -0.85 < T < -0.68 -0.68 < T < 0.36 0.36 < T < 1.4 Normalized amplitude equation UPPER CURVE 0.03 0.03 + 0.5{1+sin[(pi/2)(1+T/0.34)]} 0.08+0.407 e-1.84(T-0.36) LOWER CURVE -0.03 -0.03 + 0.5{1+sin[(pi/2)(1 + T/0.18)]} -0.03 -0.85 < T < -0.36 -0.36 < T < 0.36 0.36 < T < 1.4 Page 25 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) STS-1 TRANSMIT PULSE TEMPLATE 1.2 1 0.8 Normalized Amplitude 0.6 0.4 0.2 0 -0.2 -1 -0.5 0 Time, Unit Intervals 0.5 1 1.5 STS-1 (Transmit template specs) Time axis range (T) -0.85 < T < -0.68 -0.68 < T < 0.26 0.26 < T < 1.4 Normalized amplitude equation (A) UPPER CURVE 0.03 0.03 + 0.5{1+sin[(pi/2)(1+T/0.34)]} 0.1+0.61 e-2.4(T-0.26) LOWER CURVE -0.85 < T < -0.38 -0.38 < T < 0.36 0.36 < T < 1.4 -0.03 -0.03 + 0.5{1+sin[(pi/2)(1 + T/0.18)]} -0.03 Page 26 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) TRANSMITTER OUTPUT JITTER The transmit jitter specification ensures compliance with ITU-T G.823 and G.824, Telcordia GR-499 CORE(I) and GR-253-CORE, and ANSI T1.102-1993 for all supported rates. Transmit output jitter is guaranteed only if a clean SONET quality transmit clock source is used. Jitter Detector Transmitter Output 20dB/decade Measured Jitter Amplitude f1 f2 PARAMETER Transmitter Output Jitter CONDITION 10 Hz to 800 kHz 10 kHz to 800 kHz MIN NOM MAX 0.15 0.08 UNIT UIpp UIpp Note: Filters defined by standards are used for all testing Page 27 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) TRANSMIT MONITOR SPECIFICATIONS The transmit monitor function looks at the signals on the LOUTPx and LOUTNx pins and checks for the existence of a valid signal. The monitor detects the peak of the transmitted signal at the LOUTPx and LOUTNx pins and checks that it is between VUNDER and VOVER at all times. If the peak level is within the voltage threshold window, the TXNW signal is low. If the peak level falls outside of the threshold limits for more than approximately 25 bit times, the TXNW signal goes high. VTPOS - VTNEG VOVER VPEAK VUNDER Time PARAMETER VUNDER CONDITION DS3/STS-1 mode with LBOx=1 E3 mode; DS3/STS-1 mode with LBOx=0 DS3/STS-1 mode with LBOx=1 MIN TYP 450 550 1050 1480 MAX UNIT mVpk mVpk mVpk mVpk VOVER E3 mode; DS3/STS-1 mode with LBOx=0 Page 28 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) DS3/STS-1 -- RECEIVER SPECIFICATIONS (Transformer-coupled) PARAMETER CONDITION MON=0; Signal at DSX is 360-850 mVpk. (see Note 2) MON=1 (see Note 3) MON=0; DS3-HIGH (see Note 4) MON=0. All valid cable lengths. DS3 mode with 10 Hz – 400 kHz a) Normal receive mode b) Remote loopback mode Maximum ratio of Interference Power to Signal Power for BER < 10-8 a) With 0ft cable from DSX b) With 450ft cable from DSX MIN 90 TYP MAX 850 UNIT mVpk Peak Differential Input Amplitude, LINPx and LINNx (see Note 1) 25 90 0 80 1200 6 mVpk mVpk dB Flat-loss Tolerance Receive Clock Jitter Interfering Tone Tolerance (see Note 5) 0.1 0.06 UIpp UIpp -9 -10 dB dB Note 1: Signal source should meet DS3 template of ANSI-T102.1993 Figure 4 and STS-1 template of ANSIT102.1993 Figure 5. Loss characteristics of the WE728A or RG59B cable should be better than Figure C2 of ANSI-T102.1993. Min spec corresponds to minimum DSX amplitude, 5.5dB of cable loss (450ft) and 6dB of flat attenuation. Error-free receiver performance is guaranteed for up to 600ft of cable from DSX crossconnect. Typical part can handle up to 900ft. Min spec corresponds to amplitude of 425mVpk at DSX, 5.5dB of cable loss (450ft) and 20dB of flat attenuation. In monitor mode, interfering tone performance is not guaranteed. In this mode, no noise, jitter, or interfering tone impairments should be added for guaranteed receiver performance. Interfering signal is a non-synchronous sinusoidal tone of 22.368MHz for DS3 or 25.92MHz for STS-1. 15 Data is a PRBS15 (2 -1) pattern. Note 2: Note 3: Note 4: Note 5: Page 29 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) E3 – RECEIVER SPECIFICATIONS (Transformer-coupled) PARAMETER CONDITION MON=0 (See Note 1) Peak Differential Input Amplitude, LINPx and LINNx MON=1 (See Note 2) Flat-loss Tolerance MON=0. All valid cable lengths. With 100Hz-800kHz filter: a) Normal receive mode b) Remote loopback mode Maximum ratio of Interference Power to Signal Power for BER < 10-8 a) With 0ft cable b) With 900ft cable MIN 120 25 0 TYP MAX 1200 100 6 UNIT mVpk mVpk dB Receive Clock Jitter Interfering Tone Tolerance (see Note 3) 0.1 0.06 UIpp UIpp -9 -10 dB dB Note 1: Min spec corresponds to signal amplitude of 950mVpk at source, 12dB of cable loss (1100ft) and 6dB of flat attenuation. Error-free receiver performance is guaranteed for all cable less than 1100ft. Typical part can handle up to 1350ft. Min spec corresponds to signal amplitude of 1000mVpk at source, 12dB of cable loss (1100ft) and 20dB of flat attenuation. In monitor mode, interfering tone performance is not guaranteed. Interfering signal is a non-synchronous E3 signal of the specified power level below the desired E3 23 signal. Both data and interfering signals are PRBS23 (2 -1) pattern. Note 2: Note 3: Page 30 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) RECEIVER JITTER TOLERANCE The 78P2344JAT receive jitter tolerance exceeds all specifications as shown on the graph below. PARAMETER Receiver High Frequency Jitter Tolerance CONDITION > 60 kHz MIN 0.75 NOM MAX UNIT UIpp Jitter Tolerance: 78P234x vs. Standards 10 4 10 Jitter Tolerance (UIp-p) 3 10 2 JAT enabled 78P234x GR-499- CORE(I) [DS3] GR-499- CORE(II) [DS3] GR-253- CORE(II) [STS1] ITU-T G.823 [E3] ITU-T G.824 [DS3] 10 1 10 0 10 -1 10 -2 10 1 10 2 10 10 10 Jitter Frequency (Hz) 3 4 5 10 6 10 7 Page 31 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator ELECTRICAL SPECIFICATIONS (continued) RECEIVER JITTER TRANSFER FUNCTION The receiver clock recovery loop characteristics are such that the receiver has the following transfer function. When the Jitter Attenuator (JAT) is enabled in the receive or transmit path, the receiver or transmitter will exhibit a jitter transfer as shown in the graph and table below. Jitter Attenuator operation is guaranteed through digital scan testing. The actual jitter transfer is guaranteed by logic design and is not tested during production testing. PARAMETER Receiver Jitter transfer function CONDITION Below Fc At –3dB point JABW= 0, E3 mode (default) JABW= 1, E3 mode JABW= 0, DS3 mode (default) JABW= 1, DS3 mode JABW= 0, STS1 mode JABW= 1, STS1 mode (default) JAEN= 0, JAT disabled Jitter transfer function roll-off After Fc 20 MIN NOM MAX 0.1 13 188 17 245 20 283 55 kHz dB per decade Hz UNIT dB Receiver Jitter Bandwidth, Fc 10 0 27Hz 40Hz 53 -2 GR GR 9 49 40kHz 1kHz 59.6kHz 3) DS I( tI ) Ca S1 99 ST -4 I( tI GR Ca 53 -2 GR Jitter Transfer (dB) t Ca tI Ca -10 -20 E3 JAT ETSI TBR 24 (E3) I( 3) DS ) S3 (D STS1 JAT -30 DS3 JAT JAT Disabled -40 -50 10 100 1k 10k 100k 1M Jitter Frequency Page 32 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator APPLICATION INFORMATION EXTERNAL COMPONENTS: COMPONENT Receiver Termination Resistor Transmitter Termination Resistor PIN(S) LINPx LINNx LOUTPx LOUTNx VALUE 84.5 402 UNITS Ω Ω TOLERANCE 1% 1% TRANSFORMER SPECIFICATIONS: COMPONENT Turns Ratio for the Receiver Turns Ratio for the Transmitter (center-tapped) Suggested Manufacturer: Pulse, Tamura, Halo THERMAL INFORMATION PACKAGE Standard 100-pin JEDEC LQFP (78P2344JAT-IGT) CONDITIONS No forced air; 4-layer JEDEC test board No forced air; Exposed Pad 100-pin JEDEC LQFP (78P2344JAT-IEL) 4-layer JEDEC test board; Die attach pad soldered to PCB SCHEMATICS For schematics, recommended transformer part numbers, etc. please check Teridian Semiconductor's website or contact your local sales representative for the latest application note(s) and/or demo board manuals. 24.8 Θja ( ûC/W) 46 VALUE UNITS 1:1 1:2CT TOLERANCE Page 33 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator MECHANICAL SPECIFICATIONS (Top View) 15.7 (0.618) 16.3 (0.641) 15.7 (0.618) 16.3 (0.641) PIN No. 1 Indicator + 13.8 (0.543) SQ 14.2 (0.559) 0.60 (0.024) TYP. 0.18( 0.007) 0.27 (0.011) 0.50 TYP. (0.0197) 1.40 (0.055) 1.60 (0.063) 0.00(0) 0.20 (0.008) 78P2344JAT-IGT Mechanical Specification 100-pin TQFP (JEDEC LQFP) Page 34 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator MECHANICAL SPECIFICATIONS (Bottom View) 16.000 +/- 0.200 14.000 +/- 0.100 12.000 REF. 100 1 14.000 +/- 0.100 10.000 MAX. 13.950 +/- 0.100 MAX. 1.600 1.400 +/- 0.050 0.500 0.100 +/- 0.050 MAX. EXPOSED PAD AREA 0.220 +/- 0.050 16.000 +/- 0.200 10.000 MAX. 0.600 +/- 0.150 78P2344JAT-IEL Mechanical Specification 100-pin Exposed Pad LQFP (JEDEC LQFP) Page 35 of 37 2005 Teridian Semiconductor Corporation Rev 2.2 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator PACKAGE INFORMATION Pin-Out (Top View) GND LOUTN1 LOUTP1 GND LINP1 LINN1 GND LOUTN2 LOUTP2 GND LINP2 LINN2 N/C GND LOUTN3 LOUTP3 GND LINP3 LINN3 GND LOUTN4 LOUTP4 GND LINP4 LINN4 VCC VCC VCC VCC LBO1 LBO2 LBO3 LBO4 GNDD LPBK1 LPBK2 LPBK3 LPBK4 PORB ENDECB VCCD VCC GND MSL0 MSL1 GNDD VCCD TPOS1 TNEG1 TCLK1 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 78P2344JAT 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 VCC VCC VCC VCC N/C N/C GNDD SDI SDO SCK CS INTR1 INTR2 INTR3 INTR4 GND VCC VCCD CKREF GNDD VCCD VCCD RPOS4 RNEG4 RCLK4 ORDERING INFORMATION PART DESCRIPTION 100-pin JEDEC LQFP 100-pin JEDEC LQFP, No Jitter Attenuator 100-pin JEDEC LQFP w/ Exposed Solder Pad 100-pin JEDEC LQFP w/ Exposed Solder Pad, No Jitter Attenuator Tape & Reel option Lead-free option ORDER NUMBER 78P2344JAT-IGT /A07 78P2344-IGT /A07 PACKAGE MARK 78P2344JAT-IGT xxxxxxxxxxP7 78P2344JAT-IGT xxxxxxxxxxP7 78P2344JAT-IEL xxxxxxxxxxP7 78P2344JAT-IEL xxxxxxxxxxP7 n/a 78Pxxxxxxx-xxx xxxxxxxxxxP7F Rev 2.2 Page 36 of 37 GNDD RCLK1 RNEG1 RPOS1 VCCD TPOS2 TNEG2 TCLK2 GNDD RCLK2 RNEG2 RPOS2 VCCD TPOS3 TNEG3 TCLK3 GNDD RCLK3 RNEG3 RPOS3 VCCD TPOS4 TNEG4 TCLK4 GNDD 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 100-pin TQFP (JEDEC LQFP) 78P2344JAT-IEL /A07 78P2344-IEL /A07 append ‘R’ append ‘/F’ 2005 Teridian Semiconductor Corporation 78P2344JAT 4-port E3/DS3/STS-1 LIU with Jitter Attenuator REVISION HISTORY Revision Date: February 9, 2004 Revision Description: Final Datasheet Release (Revision.2.1) • • • Contact Teridian Semiconductor for list of changes from earlier datasheet revisions Changed company name and logo from TDK to Teridian Changed Package Marking for non-JAT 78P2344 ordering option Revision 2.2 Changes July 29, 2005 This product is sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement and limitation of liability. Teridian Semiconductor Corporation (TSC) reserves the right to make changes in specifications at any time without notice. Accordingly, the reader is cautioned to verify that a data sheet is current before placing orders. TSC assumes no liability for applications assistance. Teridian Semiconductor Corp., 6440 Oak Canyon Rd., Irvine, CA 92618 TEL (714) 508-8800, FAX (714) 508-8877, http://www.teridiansemiconductor.com Page 37 of 37 2005 Teridian Semiconductor Corporation Rev 2.2