IL34C87 CMOS Quad TRISTATE Differential Line Driver. General Description The IL34C87T is a quad differential line driver designed for digital data transmission over balanced lines. The IL34C87T meets all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS. This enables the construction of serial and terminal interfaces while maintaining minimal power consumption. The IL34C87T accepts TTL or CMOS input levels and translates these to RS-422 output levels. This part uses special output circuitry that enables the individual drivers to power down without loading down the bus. This device has separate enable circuitry for each pair of the four drivers. All inputs are protected against damage due to electrostatic discharge by diodes to VCC and ground. Pinning Pin Symbol A A1 A2 En A/B 13 D2 Description Input of driver A Output А Inverted output А input of switching outputs of A and B receivers into the third state Inverted output B Output B Input of driver B General pin Input of driver C Output C Inverted output C input of switching outputs of C and D receivers into the third state Inverted output B 14 D1 Output B 15 D Input of driver B 16 VCC 01 02 03 04 05 06 07 08 09 10 11 12 B2 B1 B GND C C1 C2 En C/D Pin of power supply 1 Designation Of microcircuit in package IL34C86N Plastic DIP IL34C86D SOIC TA from minus 40 to plus 85 °C Pin configuration. 01 16 VCC A1 02 15 D A2 03 14 D1 A En A/B 04 B2 05 13 D2 12 En C/D B1 06 11 C2 B 10 C1 07 GND 08 09 C Features • TTL input compatible • Typical propagation delays: 6 ns • Typical output skew: 0.5 ns • Outputs won’t load line when VCC = 0V • Meets the requirements of EIA standard RS-422 • Operation from single 5V supply • TRI-STATE outputs for connection to system buses • Low quiescent current • Available in surface mount IL34C87 Truth Table Input Control Non-Inverting Input Output H H H L H L X L Z L = Low logic state H = High logic state X = Irrelevant Z = TRI-STATE (high performance) Inverting Output L H Z Structure of microcircuit. Output Input Inverted output Control input Table 1 – Limiting and extreme parameters Parameter Supply voltage DC input voltage Symbol VCC VIN Operating condition min 4.50 0 max 5.50 VCC Maximum ratings min -0.5 -1.5 max 7 VCC+1. 5 7 +20 7 +150 — Units of measureme nt V DC output voltage VOUT 0 VCC -0.5 Protection diode current VDIFF — — -20 Voltage on input Enable VIN — — — Output current — — — -150 mA Input Rise or Fall Times tr, tf — 500 — ns (tr, tf) Dissipated DIP PD — — — 1736* mW power SO — — — 1226* Operating Temperature TA -40 +85 — — °С Range (TA) Storage temperature TSTG — — -65 +150 Temperature of TL — — — 260 soldering, 4s * - at increasing temperature higher than 25°C PD decreased on 13.89mW/°C for DIP package and on 9.80mW/°C for SO package. 2 IL34C87 T= -400 ÷ +850C Table 2 -Electric parameters parameter High level input voltage Low level input voltage High level output voltage Low level output voltage Differential output voltage Difference in differential outputs Output voltage Difference in common mode output symbol conditions of measurement Min Max — 0.8 — 0.5 — 0.4 V IOUT = -20mA IOUT = +48mA RL = 100 Ohm RL = 100 Ohm 2.0 — 2.5 — 2.0 — RL = 100 Ohm RL = 100 Ohm — — 3.0 0.4 V V VIN = VCC, 0V, VIH or VIL IOUT = 0mkA, VIN = VCC or 0V IOUT = 0mkA, VIN = 2.4 or 0.5V VOUT = VCC or 0V, VCONTROL = VIL — ±1.0 mkA — 500 mkA — 2.0 mA — ±5.0 mkA VIH VIL VOH VOL VT VT − VT VOS VOS − V OS Input current IIN Consumption current ICC standard units of measureme nt V V V Output current of the third state Short circuit output current IOZ ISC VIN = VCC or 0V -30 -150 mA Output current of the off state IOFF — — — 100 -100 11 mkA tPLH, tPHL VCC = 0V, VOUT = 6V VCC = 0V, VOUT = -0.25V tr, tf ≤ 6ns Skew tr, tf ≤ 6ns — 3 tRISE, tFALL tr, tf ≤ 6ns — 10 tPZH tr, tf ≤ 6ns — 25 tPZL tr, tf ≤ 6ns — 26 tPHZ tr, tf ≤ 6ns — 8 tPLZ tr, tf ≤ 6ns — 12 Time of propagation delay at switching off, switching on Asymmetric transition time when switching in, switching off Transition time when switching in, switching off time of the third state propagation delay on input Enable time of the third state propagation delay on input Enable time of the third state propagation delay on input Enable time of the third state propagation delay on input Enable 3 ns IL34C87 Figure 4 – Time diagram of signals at changing dynamic parameters tTLH, tTHL, tPLH, tPHL, SKEW. 3.0 V Control Input (Enable) f = 1MHz, tr = tf < 6 ns 0.0 V 1.3 V Output VOL + 0.3 V V OL 0.8 V T PZL T PLZ V OH Output V OH- 0.3 V 2.0 V T PZH T PHZ . 3.0 V Input 0.0 V 90 % 90 % Output (Differential) 10 % 10 % t THL t TLH 3.0 V Input f = 1MHz, tr = tf < 6 ns 1.3 V 0.0 V t PHL t PLH Output 1.3 V SKEW 1.3 V Output t PHL t PLH 4