NE83Q93N

Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 DESCRIPTION The NE83Q93 is a low power coaxial transceiver interface (CTI) for Ethernet (10base5) and Thin Ethernet (10base2) local area networks. The CTI is connected between the coaxial cable and the Data Terminal Equipment (DTE) and consists of a receiver, transmitter, receive-mode collision detector, heartbeat generator and jabber timer (see Block Diagram). The transmitter output connects directly to a doubly terminated 50Ω cable, while the receiver output, collision detector output and transmitter input are connected to the DTE through isolation transformers. Isolation between the CTI and the DTE is an IEEE 802.3 requirement that can be met on signal lines by using a set of pulse transformers. Power isolation for the CTI is achieved using DC-to-DC conversion through a power transformer (see Figure 1, Connection Diagram). The part is functionally the same as the NE83Q92, but with additional features such as a transmit enable input, a carrier detect output and five status LED driver outputs. The NE83Q93 is manufactured on an advanced BiCMOS process and is available in an SOL package making it ideally suited to lap-top personal computers or systems where low power consumption, limited board space and jumperless design is required. Refer to selection flow chart for optimal application. PIN CONFIGURATION D, N Packages CD+ CD– RX+ VEE VEE RX– TX+ TX– TEN XLED JLED LCOM 1 2 3 4 5 6 7 8 9 10 11 12 24 CDS 23 TXO 22 RXI 21 VEE 20 RR– 19 RR+ 18 GND 17 HBE 16 CRS 15 RLED 14 LINK 13 CLED SD00311 FEATURES • Fully compliant with Ethernet II, IEEE 802.3 10BASE-5 and 10BASE-2, and ISO 8802/3 interface specifications • Smart squelch on data inputs eliminates false activations • Transmit enable input and carrier sense output for repeater applications • Functionally compatible with industry standard 8392 applications • Optimal implementation can use 1 Watt DC-DC converter and reduces external parts count • Five LED status drivers for transmit, receive, collision, jabber and link fail indication • High efficiency AUI drivers minimize current consumption under idle conditions by automatically powering-down • Automatically disables AUI drivers when disconnecting coax cable, allowing hard-wiring of AUI connector and local/integrated CTI connection • Advanced BiCMOS process for extremely low power operation • Available in 24-pin DIP and 24-pin SOL packages • Full ESD protection • Power-on reset prevents glitches on coaxial cable ORDERING INFORMATION DESCRIPTION 24-Pin Plastic Dual In-Line Package (DIP) 24-Pin Plastic Small Outline Large (SOL) Package TEMPERATURE RANGE 0 to +70°C 0 to +70°C ORDER CODE NE83Q93N NE83Q93D DWG # 0410D SOT137-1 1995 May 1 1 853-1738 15180 Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 PIN DESCRIPTIONS PIN NO. D, N PKG 1 2 3 6 7 8 9 10 11 12 13 14 15 16 17 11 12 22 23 24 18 4 5 21 SYMBOL CD+ CD– RX+ RX– TX+ TX– TEN XLED JLED LCOM CLED LINK RLED CRS HBE RR+ RR– RXI TXO CDS GND DESCRIPTION Collision Outputs. Balanced differential line driver outputs which send a 10MHz signal to the DTE in the event of a collision, jabber interrupt or heartbeat test. External pull-down resistors are optional. Receiver Outputs. Balanced differential line driver outputs which send the received signal to the DTE. External pull-down resistors are optional. Transmitter Inputs. Balanced differential line receiver inputs which accept the transmission signal from the DTE and apply it to the coaxial cable at TXO, if it meets Tx squelch threshold. Transmit Enable. A CMOS compatible input requiring an input voltage range of VEE to VEE + 5V. The transmitter and loopback functions are disabled when TEN is LOW and enabled when TEN is HIGH or left floating. TEN is normally driven through an opto-coupler. Transmit Indicator. Indicates a packet is being transmitted onto the coaxial cable. Jabber Indicator. Indicates that the jabber timer has timed out and the coaxial driver is disabled. LED Common. The anodes of all status indicator LEDs are connected to this pin. It’s voltage is VEE + 5V. Collision Indicator. Indicates that a collision has been detected. Link Indicator. Indicates that a connection is present to the coaxial cable network. Receive Indicator. Indicates that a packet is being received from the coaxial cable. Carrier Sense. A real time output that indicates the presence of a carrier on the coaxial cable. CRS is normally used to drive an opto-coupler. Heartbeat Enable. The heartbeat function is disabled when this pin is connected to VEE and enabled when connected to GND or left floating. External Resistor. A 1kΩ (1%) resistor connected between these pins establishes the signaling current at TXO. Receiver Input. This pin is connected directly to the coaxial cable. Received signals are equalized, amplified, and sent to the DTE through the RX+ pins, if it meets Rx squelch threshold. Transmitter Output. This pin is connected directly (Thin Ethernet) or through an external isolating diode (Ethernet) to the coaxial cable. Collision Detect Sense. Ground sense connection for the collision detection circuitry. This pin should be connected directly to the coaxial cable shield for standard Ethernet operation. Positive Supply Pin. Negative supply pins. VEE NOTE: 1. The IEEE 802.3 name for CD is CI; for RX is DI; for TX is DO. 1995 May 1 2 Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 BLOCK DIAGRAM COAX CABLE DTE INTERFACE RXI BUFFER RECEIVER EQUALIZER LINE DRIVER RECEIVE PAIR (RX+, RX–) 4–POLE BESSEL LOW PASS FILTER RECEIVER SQUELCH CARRIER SENSE (CRS) TRANSMIT PAIR (TX+, TX–) TXO CDS SENSE BUFFER TRANSMITTER TEN TRANSMITTER SQUELCH STATUS CONTROL LINK COLLISION (CLED) JABBER (JLED) XLED RLED LCOM HBE COLLISION COMPARATOR & HEARTBEAT GENERATOR 10MHz OSC JABBER TIMER LINE DRIVER COLLISION PAIR (CD+, CD–) SD00312 ABSOLUTE MAXIMUM RATINGS SYMBOL VEE VIN TSTG TSOLD TJ θJA Supply voltage1 Voltage at any input1 PARAMETER RATING –12 0 to –12 –65 to +150 +300 +150 60 UNIT V V Storage temperature range Lead soldering temperature (10sec.) Recommended max junction temperature2 °C °C °C °C/W Thermal impedance (N and A packages) NOTE: 1. 100% measured in production. 2. The junction temperature is calculated from the following expression: TJ = TA + θJA [(VEE x 0.015 x nIDL) + (VEE x 0.027 x nRX) + (VEE x 0.075 x nTX)] where TA = Ambient temperature in °C. θJA = Thermal resistance of package. VEE = Normal operating supply voltage in volts. nIDL = Percentage of duty cycle idle nRX = Percentage of duty cycle receiving nTX = Percentage of duty cycle transmitting 1995 May 1 3 Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 ELECTRICAL CHARACTERISTICS VEE = –9V ±6%; TA = 0°C to +70°C unless otherwise specified1,2. No external isolation. LIMITS SYMBOL VUVL PARAMETER Under voltage lockout. Transceiver disabled for |VEE| < |VUVL| Supply current idle IEE IRXI ICDS VIH VIL IIH IIL VTENH VTENL ITENL ITDC ITAC ITX10 VTCOM VCD VDIS VOD VOB VOC VRS VTS RRXI CRXI RTXO RAUIZ RTX VOL IOL Supply current transmitting (without collision) Receive input bias current Cable sense input bias current HBE input HIGH voltage HBE input LOW voltage HBE input HIGH current HBE input LOW current Input HIGH voltage at TEN Input LOW voltage at TEN Input LOW current at TEN Transmit output DC current level3 Transmit output AC current level3 Transmit current Transmitter output voltage compliance4 Collision threshold5 AUI disable voltage at RXI Differential output voltage – non idle at RX+ and CD±6 Differential output voltage imbalance – idle at RX± and CD±7 Output common mode voltage at RX± and CD± Receiver squelch threshold Transmitter squelch threshold Shunt resistance at RXI non–transmitting Input capacitance at RXI8 Shunt resistance at TXO transmitting Differential impedance at RX± and CD± with no coaxial cable connected Differential impedance at TX± Output LOW voltage Output leakage current inactive IOUT = 8mA VEE < VOUT < VEE + 5 7.5 RXI = 0V VRXI average DC (CDS = 0V) (VTX+ – VTX–) peak –4.0 –150 –175 100 1 10 6 20 VEE +1.4 10 2 –5.5 –250 –225 Measured by applying DC voltage at RXI (CDS = 0V) Measured as DC voltage at RXI ±600 –1450 –1530 –3.5 ±1100 ±40 –7.0 –350 –275 VTXO = –10V –37 ±28 –250 VHBE = 0V VHBE = VEE –30 VEE + 2 VEE + 1 –50 –100 –45 ±ITDC +250 –3.7 –1580 Without external pull-down resistors and no LED loads VRXI = 0V VCDS = 0V VEE +2.4 VEE +1.6 +10 –2 +1 TEST CONDITIONS MIN TYP –7.5 –15 –80 –20 –90 +25 +3 MAX UNIT V mA mA µA µA V V µA µA V V µA mA mA µA V mV V mV mV V mV mV kΩ pF kΩ kΩ kΩ V µA LED driver and CRS output NOTES: 1. Currents flowing into device pins are positive. All voltages are referenced to ground unless otherwise specified. For ease of interpretation, the parameter limit that appears in the MAX column is the largest value of the parameter, irrespective of sign. Similarly, the value in the MIN column is the smallest value of the parameter, irrespective of sign. 2. All typicals are for VEE = –9V and TA = 27°C. 3. ITDC is measured as (VMAX + VMIN)/(2 x 25) where VMAX and VMIN are the max and min voltages at TXO with a 25Ω load between TXO and GND. ITAC is measured as (VMAX – VMIN)/(2 x 25). 4. The TXO pin shall continue to sink at least ITDC min when the idle (no signal) voltage on this pin is –3.7V. 5. Collision threshold for an AC signal is within 5% of VCD. 6. Measured on secondary side of isolation transformer (see Connection Diagram, Figure 1). The transformer has a 1:1 turns ratio with an inductance between 30 and 100µH at 5MHz. 7. Measured as the voltage difference between the RX pins or the CD pins with the transformer removed. 8. Not 100% tested in production. 1995 May 1 4 Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 TIMING CHARACTERISTICS VEE = –9V +6%; TA = 0 to 70°C, unless otherwise specified1. No external isolation diode on TXO. LIMITS SYMBOL tRON tRD tRR tRF tOS tRJ tRHI tRM tTST tTD tTR tTF tTM tTS tTON tTOFF tCON tCOFF tCHI fCD tCP tHON tHW tJA tJR LEDs tLED tXLEDON tXLEDOFF tRLEDON tRLEDOFF tCLEDON tJLEDON tJLEDOFF Turn-on or turn-off delay of LEDs XLED maximum on time XLED minimum off time RLED maximum on time RLED minimum off time CLED minimum on time JLED maximum on time JLED minimum off time 90 5 90 5 10 14 115 7 115 10 135 10 135 10 18 µs ms ms ms ms ms PARAMETER Receiver start up delay RXI to RX± (Figure 4) First received bit on RX± First validly timed bit on RX± Receiver prop. delay RXI to RX± Differential output rise time on RX± and CD±2,3 Differential output fall time on RX± and C±2,3 Differential output settling time on RX± and CD± to VOB = 40mV2 (see Figure 5) Receiver and cable total jitter Receiver high to idle time Rise and fall time matching on RX+ and CD+ Transmitter start–up delay TX± to TXO (Fig. 6) First transmitted bit on TXO First validly timed bit Transmitter prop delay TX± to TXO (see Figure 6) Transmitter rise time 10% to 90% (see Figure 6) Transmitter fall time 10% to 90% (see Figure 6) tTF – tTR mismatch5 Transmitter added skew4,5 Transmitter turn on pulse width (see Figure 6) Transmitter turn off pulse width (see Figure 6) Collision turn on delay (see Figure 7) Collision turn off delay (see Figure 7) Collision high to idle time (see Figure 7) Collision frequency (see Figure 7) Collision signal pulse width (see Figure 7) Heartbeat turn on delay (see Figure 8) Heartbeat test duration (see Figure 8) Jabber activation delay measured from TX± to CD± (see Figure 9) Jabber reset delay measured from TX± to CD± (see Figure 9) VTX± = 1V peak VTX+ = 1V peak 0V to –2V step at RXI –2V to 0V step at RXI Measured to +210mV 200 8.5 35 0.6 0.5 20 250 10 10 125 VTX+ = 1V peak 5 20 20 20 25 25 0 0 Measured to +210mV tRF – tRR VTX+ = –1V peak 200 0.1 1 VRXI = –2V peak 20 5 5 1 ±2 ±6 850 ±2 2 tTST + 2 50 30 30 ±2 ±2 35 200 13 16 850 11.5 70 1.6 1.5 60 650 TEST CONDITIONS VRXI = –2V peak MIN TYP 3 MAX 5 tRON +2 50 7 7 UNIT bits bits ns ns ns µs ns ns ns bits bits ns ns ns ns ns ns ns bits bits ns MHz ns µs µs ms ms NOTES: 1. All typicals are for VEE = –9V and TA = 27°C. 2. Measured on secondary side of isolation transformer (see Figures 1 and 2, Connection Diagram). The transformer has a 1:1 turn ratio with an inductance between 30 and 100µH at 5MHz. 3. The rise and fall times are measured as the time required for the differential voltage to change from –225mV to +225mV, or +225mV to –225mV, respectively. 4. Difference in propagation delay between rising and falling edges at TXO. 5. Not 100% tested in production. 1995 May 1 5 Philips Semiconductors Product specification Enhanced coaxial Ethernet transceiver NE83Q93 FUNCTIONAL DESCRIPTION The NE83Q93 is a low power BiCMOS coaxial Ethernet transceiver which complies with the IEEE 802.3 specification and offers a number of additional features. These features are: 1. Low current consumption of typically 15mA when idle and 80mA while transmitting without collision allows smaller DC-DC converter to be used for the isolated power supply (no external pull-down resistors). 2. Automatic selection between AUI cable and coaxial connections by placing the AUI outputs in a high impedance state when the coaxial cable is disconnected. This eliminates the need for changing a jumper position on the Ethernet board when selecting either Thin Ethernet or remote transceiver connections. 3. High efficiency AUI drivers for the RX± and CD± ports automatically power down when idling and are powered-up when a receive signal is detected. This is very important/useful for power sensitive applications such as lap-top computers or PCMCIA cards. 4. The NE83Q93 advanced AUI driver (RX± and CD±) design requires no external pull-down resistors (500Ω) to drive a terminated (78Ω) AUI cable and still meets the IEEE 802.3 specification. The drivers will also operate correctly if external resistors are present, so that they can be retro-fitted into existing 8392 designs. However, an extra current of 7mA/output (for 500Ω resistors) would be generated, by these resistors, regardless of whenther the transceiver is idle or responding to traffic. 5. Transmit enable input and carrier sense output for direct use in repeater applications. 6. LED control circuitry and drivers for indicating the transmit, receive, collision, jabber and link status of the transceiver unit. The differential line driver provides typically +900mV signals to the DTE with less than 7ns rise and fall times. When in idle state (no received signal) its outputs provide