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| HD293486 Quadruple Dfferential Line Receivers With 3 State Outputs The HD293486 features quadruple Differential line receivers designed to meet the specs of EIA RS-422A and RS-423A. This device operates from a single 5 V power supply. When the enable input is low the associated outputs are in a high impedance state. Pin Arrangement 1B 1A 1Y 1,2 Output Enable 2Y 1 2 3 4 5 6 7 8 (Top View) 16 15 14 13 12 11 10 9 Vcc 4B 4A 4Y 3,4 Output Enable 3Y 3A 3B Logic Diagram 1A 1Y 1B 1,2 Output Enable 2A 2Y 2B 3A 3B 3,4 Output Enable 4A 4Y 4B 3Y 2A 2B GND Function Table Differential Input A-B VID 0.2 V -0.2 V < VID < 0.2 V VID -0.2 V X H L X ? Z : : : : : High level Low level Irrelevant Indeterminate High Impedance Output Enable H H H L Output Y H ? L Z HD293486 Absolute Maximum Ratings Item Supply Voltage A , B Input Voltage Differential Input Voltage Enable Input Voltage Output Current Power Dissipation Symbol VCC *2 VIN VID VIE IOL PT *1 *3 HD293486 Ratings 7.0 15.0 25.0 7.0 50 DP FP 1000 785 0 to +70 -65 to +150 C C Unit V V V V mA mW Operating Temperature Storage Temperature Topr Tstg Notes: 1. The above data were taken by the VEB method mounting on a glass epoxy board (40 x 40 x 1.6 mm) of 10 % wiring density. 2. All voltage values except for differential input voltage are with respect to ground terminal. 3. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input. 4. The absolute maximum ratings are values which must not individually be exceeded, and furthemore, no two of which may be realized at the same time. Recommended Operating Conditions Item Supply Voltage In Phase Input Voltage Differential Input Voltage Output Current Operating Temperature Symbol VCC VIC VID IOH IOL Topr 0 Min 4.75 Typ 5.00 Max 5.25 7 6 -0.4 8.0 70 Unit V V V mA mA C 2 HD293486 Electrical Characteristics (Ta = 0 to +70C) Item Differential Input High Threshold Voltage Differential Input Low Threshold Voltage Enable Input Voltage Symbol VTH Conditions Vo = 2.7 V, Io = -0.4 mA Min Typ HD293486 Max 0.2 Unit V VTL VIH VIL Vo = 0.5 V, Io = 8 mA 2.0 -0.2 V 0.8 II = -10 mA VID*1 = VID *1 = 0.4 V, IO = -0.4 mA -0.4 V, IO = 8 mA 2.7 0.5 40 40 -3.25 -1.5 1.5 3.25 100 20 -100 -15 -100 -1.5 V V V A Input Clamp Voltage Output Voltage VIK VOH VOL Off State Output Current Differential Input Bias Current IOZ IOZ IIB VIE = 0.8 V, VID = -3 V, VO = 2.7 V VIE = 0.8 V, VID = 3V, VO = 0.5V Vcc = 0 V or 5.25 V Other Input = 0 V VI = 5.25 V VI = 2.7 V VI = 0.5 V VID = 3 V, VO = 0 V VI = -10 V VI = -3 V VI = 3 V VI = 10 V mA Enable Input Current IIH IIH IIL A mA Short Circuit Output Current Supply Current IOS *2 ICC VIE = 0 V 85 mA Note: 1. Not more than one output should be shorted at a time. 500 VID*1 500 VOH VOL 2V 3 HD293486 Switching Characteristics (VCC = 5 V, Ta = 25C) Item Propagation Delay Time Symbol tPHL tPLH Output Disable Time tHZ tLZ Output Enable Time tZH tZL Conditions CL = 15 pF Min Typ 28 27 26 27 13 20 Max 35 30 35 35 30 30 HD293486 Unit ns ns ns Switching Time Test Method 1. tPLH , tPHL Test circuit Pulse Generator Input Output 1.5 V 2V Notes : 1. The pulse generator has following characteristics: PRR = 1 MHZ, 50 % duty cycle, tr 6ns, tf 6ns, Zout = 50 2. CL includes probe and jig capacitance. CL = 15 pF Waveforms 1.5 V Input A 1.5 V 3V 0V 3V Input B 1.5 V 1.5 V tPHL 0V tPLH 1.3 V Output VOL 1.3 V VOH 4 HD293486 2. tHZ, tZH, tLZ, tZL Test circuit SW 1 -1.5 V 1.5 V Output 2 K SW2 HD293486 5V Input Pulse Generator CL = 15 pF 5 K SW3 Notes: 1. The pulse generator has following characteristics: PRR = 1 MHZ, 50 % duty cycle, tr 6 ns, tf 6 ns, Zout = 50 2. CL includes probe and jig capacitance. 3. All diodes are 1S2074 H Waveforms (1) tHZ Input 1.5 V Output 0.5 V tHZ 3V 0V VOH 1.3 V SW1 to 1.5 V SW2 CLOSE SW3 CLOSE (2) tZH 3V Input 1.5 V 0V Output tHZ 1.5 V 1.3 V VOH SW1 to 1.5 V SW2 OPEN SW3 CLOSE 5 HD293486 (3) tLZ 3V Input 1.5 V 0V tLZ Output 0.5 V VOL 1.3 V HD293486 SW1 to -1.5 V SW2 CLOSE SW3 CLOSE (4) tZL Input 1.5 V tZL 0V 4.5 V SW1 to -1.5 V SW2 CLOSE SW3 OPEN 3V Output VOL 6 |
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