XRT3588CP-F

XR-T3588/89 ...the analog plus V.35 Interface Receiver/Transmitter company TM June 1997-3 FEATURES APPLICATIONS
Compatible with ITU-T V.35 and Bell 306 Interface Requirements
High Speed Data Transmission Systems
TTL Input Compatibility
Short Haul Modems
High Common Mode Output Voltage Range
Signal Converters and Adapters
Excellent Stability over Supply and Temperature Range
Network and Diagnostic Systems
High Speed Operation (up to 10Mbps)
Matrix Switches
Individual Receive/Transmit Power Down Capability
Modem Emulators GENERAL DESCRIPTION This V.35 chip set consists of two bipolar chips, one performing a receive function, the other a transmit function according to the specification requirements laid down in Appendix 11 of the V.35 ITU-T Recommendation and Bell 306 modem interface specification. approximately 22mA or each output stage to meet ITU-T specifications), power-down functions are included in both devices, allowing any of the three receive/transmit circuits to be disabled. All inputs and outputs are TTL compatible and designed to offer maximum versatility and performance. Typical applications require three transmit and receive pairs to establish the link between distant DTE’s at data rates ranging from 48Kbps to 10Mbps. To conserve power (especially in the transmitter, which requires Both the transmitter and receiver require termination resistors external to each device, to meet the V.35 specification tolerance. ORDERING INFORMATION Part No. Package Operating Temperature Range XR-T3588CN 18 Lead 300 Mil CDIP 0°C to 70°C XR-T3588CP 18 Lead 300 Mil PDIP 0°C to 70°C XR-T3589CN 14 Lead 300 Mil CDIP 0°C to 70°C Rev. 1.05 1997 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538  (510) 668-7000  FAX (510) 668-7017 1 XR-T3588/89 BLOCK DIAGRAM I/P 1 TTL INPUT GND vCC 1 7 vEE 9 INP 4 16 VREF 1 17 O/P 1B 18 O/P 1A 13 VREF 2 15 O/P 2B 14 O/B 2A 10 VREF 3 12 O/P 3B 11 O/B 3A vee I/P 2 TTL INPUT 5 INP vee I/P 3 TTL INPUT 6 INP vee SELA 2 SELB 3 1 SELECTOR 2 3 BIAS 8 BIAS Figure 1. XR-T3588 Block Diagram Rev. 1.05 2 XR-T3588/89 GND 1 I/P 1B 12 + 1/P 1A 13 – I/P 2B 10 + 1/P 2A 11 – I/P 3B 8 + 1/P 13 9 – SELA 2 VCC VEE 14 7 3 SELB 2 1 Selector 3 Figure 2. XR-T3588 Block Diagram Rev. 1.05 3 4 O/P 1 5 O/P 2 6 O/P 3 XR-T3588/89 PIN CONFIGURATION GND SELA SELB I/P1 I/P2 I/P3 vCC BIAS vEE 1 18 2 17 3 16 4 15 5 14 6 13 7 12 8 11 9 10 O/P1A O/P1B VREF1 O/P2B O/P2A VREF2 O/P3B O/P3A VREF3 GND SELA SELB O/P1 O/P2 O/P3 VEE 18 Lead PDIP, CDIP (0.300”) XR–T3588 1 14 2 13 3 12 4 11 5 10 6 9 7 8 VCC I/P1A I/P1B 1/P2A 1/P2B I/P3A I/P3B 14 Lead CDIP (0.300”) XR–T3589 PIN DESCRIPTION FOR XR-T3588 Pin # Symbol Type Description 1 GND 2 SELA I Ground (0V). Channel Enable Select A Input. TTL compatible input used in conjunction with SELB to power down individual receiver channels. (see table 2). 3 SELB I Channel Enable Select B Input. TTL compatible input used in conjunction with SELA to power down individual receiver channels (see table 2). 4 I/P1 I Channel 1 Input. TTL compatible. 5 I/P2 I Channel 2 Input. TTL compatible. 6 I/P3 I Channel 3 Input. TTL compatible. 7 VCC 8 BIAS 9 VEE 10 VREF3 O Channel 3 Voltage Regulator. Provides 3.3V regulated supply for connection of channel 3 transmit termination network (see Figure 6). If the driver is disabled, the voltage output at this pin will be Vcc - 0.7V. 11 O/P3A O Channel 3 Differential Output A. Open collector current output. Current sink capability 22mA nominal (defined by Rbias). When terminated with network to VREF3 provides an output voltage with inverse phase to I/P3. DC level with TX and RX termination +/-O.275V nominal. 12 O/P3B O Channel 3 Differential Output B. Open collector current output. Current sink capability 22mA nominal (defined by Rbias). When terminated with network to VREF3 provides an output voltage in phase with I/P3. DC level with TX and RX termination +/-O.275V nominal. 13 VREF2 O Channel 2 Voltage Regulator. Provides 3.3V regulated supply for connection of channel 2 transmit termination network (see Figure 6). If the driver is disabled, the voltage output at this pin will be Vcc - 0.7V. 14 O/P2A O Channel 2 Differential Output A. Open collector current output. Current sink capability 22mA Nominal (Defined by Rbias). When terminated with network to VREF2 provides an output voltage with inverse phase to I/P2. DC level with TX and RX termination +/-o.275V nominal. 15 O/P2B O Channel 2 Differential Output B. Open collector current output. Current sink capability 22mA nominal (defined by Rbias). When terminated with network to VREF2 provides an output voltage in phase with I/P2. DC level with TX and RX termination +/-O.275V nominal. Positive Supply (5V). I Bias Current Input. DC level 1.1V nominal. Connect external resistor from pin to ground to define transmitter output current levels (Rbias 3.9k for Iout=22mA). Negative Supply (-5V). Rev. 1.05 4 XR-T3588/89 PIN DESCRIPTION FOR XR-T3588 (CONT’D) Pin # Symbol Type Description 16 VREF1 O Channel 1 Voltage Regulator. Provides 3.3V regulated supply for connection of channel 1 transmit termination network (see Figure 6). If the driver is disabled, the voltage output at this pin will be Vcc - 0.7V. 17 O/Pl B O Channel I Differential Output B. Open collector current output. Current sink capability 22mA nominal (defined by Rbias). When terminated with network to VREF1 provides an output voltage in phase with I/P2. DC level with TX and RX termination +/-O.275V nominal. 18 O/Pl A O Channel 1 Differential Output A. Open collector current output. Current sink capability 22mA nominal (defined by Rbias). When terminated with network to VREF2 provides an output voltage with inverse phase to I/Pl. DC level with TX and RX termination +/-O.275V nominal. PIN DESCRIPTION FOR XR-T3589 Pin # Symbol Type Description 1 GND 2 SELA I Channel Enable Select A Input. TTL compatible input used in conjunction with SELB to power down individual receiver channels. (see table 2). 3 SELB I Channel Enable Select B Input. TTL compatible input used in conjunction with SELA to power down individual receiver channels (see table 2). 4 O/P1 O Channel 1 Output. TTL compatible. 5 O/P2 O Channel 2 Output. TTL compatible. 6 O/P3 O Channel 3 Output. TTL compatible. 7 VEE 8 I/P3B I Channel 3 Differential Input B. Rin 4kL2 nominal. Should be terminated with an external network to GND (see Figure 8). 9 I/P3A I Channel 3 Differential Input A. Rin 4k.Q nominal. Should be terminated with an external network to GND (see Figure 8). 10 VP2B I Channel 2 Differential Input B. Rin 4kL2 nominal. Should be terminated with an external network to GND (see Figure 8). 11 I/P2A I Channel 2 Differential Input A. Rin 4kQ nominal. Should be terminated with an external network to GND (see Figure 8). 12 I/Pl B I Channel I Differential Input B. Rin 4k.Q nominal. Should be terminated with an external network to GND (see Figure 8). 13 I/PlA I Channel I Differential Input A. Rin 4k.Q nominal. Should be terminated with an external network to GND (see Figure 8). 14 VCC Ground (0V). Negative Supply (-5V). Positive Supply (5V). Rev. 1.05 5 XR-T3588/89 XR-T3588 ELECTRICAL CHARACTERISTICS Test Conditions: VCC = 5V ±5%, VEE = -5V ±5%, TA = 0°C to 70°C Symbol Parameter Min. Typ. Max. Unit Conditions DC Electrical Characteristics VCC Positive Supply Voltage 4.75 5 5.25 V VEE Negative Supply Voltage -4.75 -5 -5.25 V ICC Input Current 86 124 mA 1 IEE Input Current mA 1 lPCC Power Down ICC 0.2 10.2 mA 2 IPEE Power Down lEE -1.0 -14.0 mA 2 VDIH High Level Input Voltage 2 VCC V Data Inputs IDIL Low Level Input Voltage 0 0.8 V Data Inputs IDIH Input Current High
A Data Inputs IDIL Input Current Low mA Data Inputs VSIH Selector High Level Voltage 2 VCC V VSIL Selector Low Level Voltage 0 0.6 V ISIL Selector Input Current Low -0.6 -132 1.0 -2.1 ISIH Selector Input Current High VOL Output Low Voltage VOH Output High Voltage ZS Source Impedance 90 RGND Resistance to Ground IODIFF VREF AC Electrical -92 mA 50
A V 3 0.85 V 3 100 110 Ω Per CCITT V.354,5,6 135 150 165 Ω Per CCITT V.354,5,6 Output Current Differential 20.2 22.0 23.8 mA Transmitter Reference Voltage 3.0 3.3 3.6 V Characteristics6 -0.91 With 3.9K Bias Resistor Voltage Output (see Figure 3) tPLHT Input to Output 25 50 ns tPHLT Input to Output 25 50 ns tRT TX Rise Time 10 20 ns tFT TX Fall Time 10 20 ns Notes 1 With extemal transmit network (Figure 6) connected to each transmitter output and select A, select B both high. 2 All transmitter outputs open-circuit and select A, select B both low. 3 With extemal transmit network terminated with 100Ω (Figure 7). 4 Differential impedance between O/P A and O/P B. extemal transmit network (Figure 6) connected to transmitter output. 5 O/P A’s and O/P Bs connected together, resistance measured to ground, extemal transmit network ((Figure 6) present. 6 O/P terminated with extemal transmit network terminated with 100Ω (See Figure 7). Specifications are subject to change without notice Rev. 1.05 6 XR-T3588/89 XR-T3589 ELECTRICAL CHARACTERISTICS Test Conditions: VCC = 5V ±5%, VEE = -5V ±5%, TA = 0°C to 70°C Symbol Parameter Min. Typ. Max. Unit Conditions DC Electrical Characteristics Vcc Supply Voltage 4.75 5 5.25 V VEE Supply Voltage -5.25 -5 -4.75 V ICC Input Current 40 60 mA Select A, Select B, Both High IEE Input Current 7 9 mA Select A, Select B, Both High IOH Output High Level Current
A VOH ≥ 2.4V IOL Output Low Level Current 40 mA VOL < 0.4V VOH High Level Output VOL Low Level Output VIN Input Sensitivity 400 mV Differential2 ZINO Input Impedance 8 kΩ Differential2 ZINT Input Impedance 90 100 110 Ω Per ITU-T V.351, 2 RGND Resistance to GND 135 150 165 Ω Per ITU-T V.351, 2 VSIH Select High Level Voltage VCC V -1.6 2.4 0.4 VSIL Select Low Level Voltage lPCC Power Down ICC Current IPEE Power Down IEE Current 2 0.8 1.1 V at IOH < 40
A V at IOL < 1.6mA V mA -0.3 Select A, Select B, Both Low mA AC Electrical Characteristics (see Figure 4) tPLHR Input to Output 50 70 ns tPHLR Input to Output 50 70 ns tRR RX Rise Time 18 40 ns tFR RX Fall Time 12 30 ns Notes 1 I/P terminated to circuit 102 (see Figure 8.) 2 Pins 8-9, 10-11, 12-13. Specifications are subject to change without notice ABSOLUTE MAXIMUM RATINGS Supply Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±7V Storage Temperature . . . . . . . . . . . . -65°C to + 150°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XR-T3588CN . . . . . . . . . . . . . . . . . . . 1000mW XR-T3589CN . . . . . . . . . . . . . . . . . . . . 300mW Rev. 1.05 7 XR-T3588/89 I/P O/PB O/PA 90% 10% tPLHT tPHLT tRT tFT Figure 3. Transmitter Waveforms I/P B I/P A 90% 10% O/P tPLHR tPHLR tRR tFR Figure 4. Receiver Waveforms SYSTEM DESCRIPTION XR–T3588 XR–T3589 The function of the transmitter is to take a TTL input signal at a maximum bit rate of 1OMbps and output a balanced differential signal with a peak amplitude of 0.55V and a maximum DC offset of 0.6V. An internal buffer provides the regulated output voltage to set the mean level of the transmitters to less than 0.6V. Figure 5 shows a simplified circuit for the output stage. The XR-T3589 Line Receiver contains three identical receive circuits to complement the XR-T3588 Line Transmitter. Received differential signals are converted into a single TTL compatible output. The input stage is designed to meet the full V.35 noise and common mode input specification. To meet the pulse shape and offset requirements laid down in the V.35 specification, the transmitter employs an internal temperature compensated voltage generator to provide reference voltages for both offset control and output current generation. Load resistors for the output stage, which provide the required source impedance for the transmitter, are external to the IC and are required to meet the V.35 specified tolerance. Individual receivers may be shut down to achieve power savings for applications not requiring three channels. Two TTL compatible inputs provide four combinations of transmitter configurations, as defined in table 2. If either of the select pins is left open a high state is adopted, hence with no inputs applied, all channels are powered up. However it is recommended to tie all select inputs to either GND or VCC. Rev. 1.05 8 XR-T3588/89 Transmitter SEL A SEL B Transmitter SEL A SEL B 1-2-3 ON HIGH HIGH 1-2-3 ON HIGH HIGH 1-2 ON HIGH LOW 1-2 ON HIGH LOW 1 ON LOW HIGH 1 ON LOW HIGH ALL OFF LOW LOW ALL OFF LOW LOW Table 1. Transmitter Selectors Table 2. Receiver Selectors TYPICAL APPLICATIONS qJA for the ceramic package of 80°C/W, and a maximum ambient temperature of 70°C the junction temperature is; Figure 9 shows a schematic for a typical application of the XR-T3588/T3589. In this application the termination resistor network is fed from the chip on-board regulator. The regulator provides a voltage of 3.3V. Tjunction = 70 + 80 - 0.672 = 1 34°C If the device is used in an enclosure without forced cooling where the ambient temperature could approach or exceed 70°C, the power dissipation of the part should be reduced for improved reliability. The major issue is the power dissipation of the XR-T3588. Following is a discussion of the power that is dissipated by the XR-T3588 when all three drivers are active simultaneously. The power used by the XR-T3588 is given by; Pd = (VCC - ICC + VEE - IEE) - 3 - (Rterm - Figure 10 shows an implementation using an external reference voltage made with two resistors of values 180Ω and 360Ω. This implementation offers the advantage of eliminating the feeding current to the termination network from the on chip reference, thereby reducing the dissipation in the XR-T3588. (Iterm)2) Where: VCC, ICC, VEE and IEE are the positive and negative supply voltages and currents, whose values may be found in the typical column of the DC Characteristics, The formula to calculate the on chip power dissipation is now; Rterm is the equivalent impedance of the termination network, Pd = (VCC - IGG + VEE - IEE) - 3 - ((VCC - 3.3) lterm + Rterm - (iterm)2) lterm is the current flow through the termination network. Where the term “3 - (VCC - 3.3) - (Iterm)” is the power previously dissipated in the XR-T3588 internal voltage regulator. In the case of the three drivers enabled and terminated, the typical power dissipation is; Pd = (5 - 0.086 + (5 - 0.092)) - 3 - (150 - (0.022)2) = 672.2mW The revised value of power dissipation is; Pd = (5 - 0.086) + (5 - 0.092) - 3 - ((5 - 3.3) - 0.022 + 150 - (0.022)2) = 560mW The junction temperature of the part is given by; Tjunction= Tambient + (qJA - Pd) The total on chip power saving is; 3 - (5 - 3.3) - 0.022, i.e. 112.2 mW. where: Tjunction is junction temperature, Tambient is ambient temperature, qJA is package thermal impedance. Figure 11 shows the demo board schematic. For reliable operation, the absolute maximum junction temperature must be maintained below 150°C. With a To obtain a representative. Rev. 1.05 9 demo board, call your local XR-T3588/89 VREF 1 (3.3V Nominal) Pin 16 VREF 125 125 50 50 50 Pin 18 O/P 1A 50 Pin 17 O/P 1B O/P A Pin 8 Sets Current Source Value Bias ↓22mA 3.9K O/B B VEE Figure 5. XR-T3588 Output Stage Simplified Circuit Figure 6. External Transmit Network I/P A VREF 125 I/P B 50 50 50 50 O/P A 125 100 O/P B Figure 7. XR-T3588 Output Stage Simplified Circuit Figure 8. External Receive Network Rev. 1.05 10 XR-T3588/89 Rev. 1.05 11 XR-T3588/89 Rev. 1.05 12 XR-T3588/89 18 LEAD CERAMIC DUAL-IN-LINE (300 MIL CDIP) Rev. 1.00 18 10 1 9 E E1 D A1 Base Plane Seating Plane A L c e B α B1 INCHES SYMBOL MILLIMETERS MIN MAX MIN MAX A 0.100 0.200 2.54 5.08 A1 0.015 0.070 0.38 1.78 B 0.014 0.026 0.36 0.66 B1 0.045 0.065 1.14 1.65 c 0.008 0.018 0.20 0.46 D 0.860 0.960 21.84 24.38 E1 0.250 0.310 6.35 7.87 E 0.300 BSC 7.62 BSC e 0.100 BSC 2.54 BSC L 0.125 0.200 3.18 5.08 α 0° 15° 0° Note: The control dimension is the inch column 15° Rev. 1.05 13 XR-T3588/89 18 LEAD PLASTIC DUAL-IN-LINE (300 MIL PDIP) Rev. 1.00 18 10 1 9 E1 E D Seating Plane A2 A L α A1 B e INCHES SYMBOL eA eB B1 MILLIMETERS MIN MAX MIN MAX A 0.145 0.210 3.68 5.33 A1 0.015 0.070 0.38 1.78 A2 0.115 0.195 2.92 4.95 B 0.014 0.024 0.36 0.56 B1 0.030 0.070 0.76 1.78 C 0.008 0.014 0.20 0.38 D 0.845 0.925 21.46 23.50 E 0.300 0.325 7.62 8.26 E1 0.240 0.280 6.10 7.11 e 0.100 BSC 2.54 BSC eA 0.300 BSC 7.62 BSC eB 0.310 0.430 7.87 10.92 L 0.115 0.160 2.92 4.06 α 0° 15° 0° 15° Note: The control dimension is the inch column Rev. 1.05 14 C XR-T3588/89 14 LEAD CERAMIC DUAL-IN-LINE (300 MIL CDIP) Rev. 1.00 14 8 1 7 E E1 D A1 Base Plane Seating Plane A L e c B α B1 INCHES SYMBOL MILLIMETERS MIN MAX MIN MAX A 0.100 0.200 2.54 5.08 A1 0.015 0.060 0.38 1.52 B 0.014 0.026 0.36 0.66 B1 0.045 0.065 1.14 1.65 c 0.008 0.018 0.20 0.46 D 0.685 0.785 17.40 19.94 E1 0.250 0.310 6.35 7.87 E 0.300 BSC 7.62 BSC e 0.100 BSC 2.54 BSC L 0.125 0.200 3.18 5.08 α 0° 15° 0° Note: The control dimension is the inch column 15° Rev. 1.05 15 XR-T3588/89 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 1997 EXAR Corporation Datasheet June 1997 Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Rev. 1.05 16