IL34C87 CMOS Quad TRISTATE Differential Line Driver.

Transcription

1 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 V CC and ground. Pinning Pin Symbol Description 01 A of driver A 02 A1 А 03 A2 Inverted output А 04 En A/B input of switching outputs of A and B receivers into the third state 05 B2 Inverted output B 06 B1 B 07 B of driver B 08 GND General pin 09 C of driver C 10 C1 C 11 C2 Inverted output C 12 En C/D input of switching outputs of C and D receivers into the third state 13 D2 Inverted output B 14 D1 B 15 D of driver B 16 V CC Pin of power supply Designation Of microcircuit in package IL34C86N Plastic DIP IL34C86D SOIC T A from minus 40 to plus 85 C A A1 A2 En A/B B2 B1 B GND Pin configuration V CC D D1 D2 En C/D Features TTL input compatible Typical propagation delays: 6 ns Typical output skew: 0.5 ns s won t load line when V CC = 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 C2 C1 C 1

2 Truth Table Control Non-Inverting Inverting H H H L L H L H X L Z Z L = Low logic state H = High logic state X = Irrelevant Z = TRI-STATE (high performance) Structure of microcircuit. Inverted output Control input Table 1 Limiting and extreme parameters Parameter Symbol Operating condition Maximum ratings min max min max Units of measureme nt Supply voltage V CC V DC input voltage V IN 0 V CC -1.5 V CC DC output voltage V OUT 0 V CC Protection diode current V DIFF Voltage on input V IN 7 current ma Rise or Fall Times (tr, tf) t r, t f 500 ns Dissipated DIP P D 1736 * mw power SO 1226 * Operating Temperature T A С Range (TA) Storage temperature T STG Temperature of soldering, 4s T L 260 * - at increasing temperature higher than 25 C P D decreased on 13.89mW/ C for DIP package and on 9.80mW/ C for SO package. 2

3 Table 2 -Electric parameters T= C parameter symbol conditions of standard measurement Min Max units of measureme nt V High level input voltage V IH 2.0 Low level input voltage V IL 0.8 High level output voltage V OH I OUT = -20mA 2.5 V Low level output voltage V OL I OUT = +48mA 0.5 Differential output voltage V T R L = 100 Ohm 2.0 V Difference in differential outputs R V T V L = 100 Ohm 0.4 V T voltage V OS R L = 100 Ohm 3.0 V Difference in common mode R OS output V V L = 100 Ohm 0.4 V OS current I IN V IN = V CC, 0V, ±1.0 mka V IH or V IL Consumption current I CC I OUT = 0mkA, 500 mka V IN = V CC or 0V I OUT = 0mkA, 2.0 ma V IN = 2.4 or 0.5V current of the third I OZ V OUT = V CC or 0V, V CONTROL ±5.0 mka state = V IL Short circuit output current I SC V IN = V CC or 0V ma current of the off state I OFF V CC = 0V, V OUT = 6V 100 V CC = 0V, V OUT = -0.25V -100 mka Time of propagation delay at switching off, switching on Asymmetric transition time when switching in, switching off Transition time when switching in, switching off t PLH, t PHL t r, t f 6ns 11 Skew t r, t f 6ns 3 t RISE, t FALL t r, t f 6ns 10 t PZH t r, t f 6ns 25 t PZL t r, t f 6ns 26 t PHZ t r, t f 6ns 8 t PLZ t r, t f 6ns 12 ns 3

4 Figure 4 Time diagram of signals at changing dynamic parameters t TLH, t THL, t PLH, t PHL, SKEW. 3.0 V Control () f = 1MHz, t r = t f < 6 ns 0.0 V V V OL 0.8 V VOL VOH T LZ P T ZL P V OH- 0.3 V 2.0 V T HZ P T ZH P. 3.0 V 0.0 V (Differential) 90 % 90 % 10 % 10 % t TLH t THL 3.0 V f = 1MHz, t r = t f < 6 ns 0.0 V t PLH t PHL SKEW t PHL t PLH 4

5 Dimensional package sizes IL34C87 Dimensional sizes of the DIP-package MS-001BB D 16 9 E1 1 8 b2 A E C A1 e b L c α 0,25 (0,010) M C Note - Dimensions D, E1 do not include the fin value, which should not exceed 0.25 mm (0.010) per side. D E1 A b b2 e α L E c A1 mm min max Inches min max

6 Dimensional sizes of the SO-package MS-012AC IL34C87 16 A 9 H B P 1 G 8 C R x 45 -T- D 0.25 (0.010) M T CM K Mounting plane J F M Note: 1. Dimensional sizes А and В are preset without consideration of fin and the metal bulges. 2. Availability of the fin and the metal bulges for А up to 0.15 mm (0.006) per side; for B up to 0.25 mm (0.010) per side. Identification Sizes, mm MIN MAX A B C D F G 1.27 H 5.72 J 0 8 K M P R