QUADRUPLE DIFFERENTIAL LINE DRIVER

AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 D D D D D D Meets or Exceeds the Requirements of ANSI TIA/EIA-422-B and ITU Recommendation V.11 Operates From a Single 5-V Supply TTL Compatible Complementary Outputs High Output Impedance in Power-Off Conditions Complementary Output-Enable Inputs D OR N PACKAGE (TOP VIEW) 1A 1Y 1Z G 2Z 2Y 2A GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC 4A 4Y 4Z G 3Z 3Y 3A description The AM26LS31C is a quadruple complementary-output line driver designed to meet the requirements of ANSI TIA/EIA-422-B and ITU (formerly CCITT) Recommendation V.11. The 3-state outputs have high-current capability for driving balanced lines such as twisted-pair or parallel-wire transmission lines, and they provide a high-impedance state in the power-off condition. The enable function is common to all four drivers and offers the choice of an active-high or active-low enable (G, G) input. Low-power Schottky circuitry reduces power consumption without sacrificing speed. The AM26LS31C is characterized for operation from 0°C to 70°C. FUNCTION TABLE (each driver) INPUT A H L H L X ENABLES G H H X X L G X X L L H OUTPUTS Y H L H L Z Z L H L H Z H = high level, L = low level, X = irrelevant, Z = high impedance (off) Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1998, Texas Instruments Incorporated POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 logic symbol† 4 12 ≥1 EN G G 1A 1 2 3 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z 2A 7 6 5 3A 9 10 11 4A 15 14 13 logic diagram (positive logic) G G 1A 4 12 2 1 3 6 2A 7 5 10 3A 9 11 14 4A 15 13 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 schematic (each driver) Input A V 22 kΩ 9Ω Output Y 9Ω Output Z Common to All Four Drivers VCC V 22 kΩ 22 kΩ Enable G Enable G To Three Other Drivers GND All resistor values are nominal. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Output off-state voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values, except differential output voltage VOD, are with respect to network GND. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 recommended operating conditions (unless otherwise noted) MIN Supply voltage, VCC High-level input voltage, VIH Low-level input voltage, VIL High-level output current, IOH Low-level output current, IOL Operating free-air temperature, TA 0 4.75 2 0.8 –20 20 70 NOM 5 MAX 5.25 UNIT V V V mA mA °C electrical characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL IOZ II IIH IIL IOS Input clamp voltage High-level output voltage Low-level output voltage Off-state (high impedance state) Off state (high-impedance-state) output current Input current at maximum input voltage High-level input current Low-level input current Short-circuit output current‡ TEST CONDITIONS VCC = 4.75 V, VCC = 4.75 V, VCC = 4.75 V, VCC = 4 75 V 4.75 VCC = 5.25 V, VCC = 5.25 V, VCC = 5.25 V, VCC = 5.25 V II = –18 mA IOH = –20 mA IOL = 20 mA VO = 0.5 V VO = 2.5 V VI = 7 V VI = 2.7 V VI = 0.4 V –30 MIN 2.5 0.5 –20 20 0.1 20 –0.36 –150 80 TYP† MAX –1.5 UNIT V V V µA mA µA mA mA mA ICC Supply current VCC = 5.25 V, All outputs disabled 32 † All typical values are at VCC = 5 V and TA = 25°C. ‡ Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second. switching characteristics, VCC = 5 V, TA = 25°C (see Figure 1) PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay time, low-to-high-level output Propagation delay time, high-to-low-level output Output enable time to high level Output enable time to low level Output disable time from high level Output disable time from low level Output-to-output skew TEST CONDITIONS CL = 30 pF pF, CL = 30 pF CL = 10 pF pF, CL = 30 pF, S1 and S2 open RL = 75 Ω RL = 180 Ω S1 and S2 closed S1 and S2 open MIN TYP 14 14 25 37 21 23 1 MAX 20 20 40 45 30 35 6 UNIT ns ns ns ns 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 PARAMETER MEASUREMENT INFORMATION Input A (see Notes B and C) Test Point VCC 180 Ω S1 From Output Under Test CL (see Note A) 75 Ω S2 tPHL Output Z PROPAGATION DELAY TIMES AND SKEW 1.5 V VOL TEST CIRCUIT Output Y Skew Skew tPLH VOH 1.5 V VOL 3V 1.3 V tPLH 1.3 V 0V tPHL VOH Enable G (see Note D) Enable G 3V 1.5 V tPZL See Note D tPLZ ≈4.5 V 1.5 V 0.5 V tPZH tPHZ 0.5 V VOH ≈1.5 V ≈0 V S1 Closed S2 Closed 1.5 V 0V S1 Closed S2 Closed ≈1.5 V VOL Waveform 1 (see Note E) S1 Closed S2 Open Waveform 2 (see Note E) S1 Open S2 Closed 1.5 V ENABLE AND DISABLE TIME WAVEFORMS NOTES: A. B. C. D. E. CL includes probe and jig capacitance. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO ≈ 50 Ω, tr ≤ 15 ns, tf ≤ 6 ns. When measuring propagation delay times and skew, switches S1 and S2 are open. Each enable is tested separately. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. Figure 1. Test Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 TYPICAL CHARACTERISTICS OUTPUT VOLTAGE vs ENABLE G INPUT VOLTAGE OUTPUT VOLTAGE vs ENABLE G INPUT VOLTAGE Load = 470 Ω to GND TA = 25°C See Note A VCC = 5.25 V VCC = 5 V VO – Y Output Voltage – V VCC = 4.75 V VO – Y Output Voltage – V 3 3 2 2 1 1 0 0 1 2 3 VI – Enable G Input Voltage – V 0 0 1 2 3 VI – Enable G Input Voltage – V Figure 2 OUTPUT VOLTAGE vs ENABLE G INPUT VOLTAGE 6 6 VCC = 5.25 V VCC = 5 V 5 5 VO – Output Voltage – V VO – Output Voltage – V 4 VCC = 4.75 V 4 3 3 2 2 1 0 Load = 470 Ω to VCC TA = 25°C See Note B 1 1 0 0 2 3 0 VI – Enable G Input Voltage – V Figure 4 NOTES: A. The A input is connected to VCC during testing of the Y outputs and to ground during testing of the Z outputs. B. The A input is connected to ground during testing of the Y outputs and to VCC during testing of the Z outputs. 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎ VCC = 5 V Load = 470 Ω to GND See Note A TA = 70°C TA = 0°C TA = 25°C ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ 4 4 Figure 3 OUTPUT VOLTAGE vs ENABLE G INPUT VOLTAGE TA = 70°C TA = 25°C TA = 0°C VCC = 5 V Load = 470 Ω to VCC See Note B 1 2 3 VI – Enable G Input Voltage – V Figure 5 AM26LS31C QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS114D – JANUARY 1979 – REVISED OCTOBER 1998 TYPICAL CHARACTERISTICS HIGH-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 5 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 4 VOH – High-Level Output Voltage – V 4 VOH – High-Level Output Voltage – V IOH = –20 mA 3 3 IOH = –40 mA 2 2 1 1 0 0 25 50 75 TA – Free-Air Temperature – °C Figure 6 LOW-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE VOL– Low-Level Output Voltage – V VCC = 5 V IOL = 40 mA See Note B 0.9 0.8 0.7 0.6 VOL– Low-Level Output Voltage – V 0.4