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. Logic Diagram Pin Arrangement 1B 1 16 Vcc 1A 2 15 4B 1Y 1,2 Output Enable 3 14 4A 4 13 4Y 2Y 5 12 2A 6 11 3,4 Output Enable 3Y 2B 7 10 3A GND 8 9 3B 1A 1Y 1B 1,2 Output Enable 2A 2Y 2B (Top View) 3A 3B 3Y Function Table 3,4 Output Enable 4A 4Y 4B Differential Input A–B Output Enable Output Y VID ≥ 0.2 V H H –0.2 V < VID < 0.2 V H ? VID ≤ –0.2 V H L X L Z H L X ? Z : : : : : High level Low level Irrelevant Indeterminate High Impedance HD293486 HD293486 Absolute Maximum Ratings Item Symbol Ratings Unit Supply Voltage VCC *2 7.0 V A , B Input Voltage VIN ±15.0 V Differential Input Voltage VID V Enable Input Voltage VIE ±25.0 7.0 Output Current IOL 50 mA DP 1000 mW FP 785 Power Dissipation *3 PT *1 V Operating Temperature Topr 0 to +70 °C Storage Temperature Tstg –65 to +150 °C Notes: 1. The above data were taken by the ∆VEB method mounting on a glass epoxy board (40 × 40 × 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 Symbol Min Typ Max Unit 4.75 5.00 5.25 V Supply Voltage VCC In Phase Input Voltage VIC ±7 V Differential Input Voltage VID IOH ±6 –0.4 V Output Current IOL 8.0 mA 70 °C Operating Temperature 2 Topr 0 mA HD293486 HD293486 Electrical Characteristics (Ta = 0 to +70°C) Item Symbol Conditions Differential Input High Threshold Voltage VTH Differential Input Low Threshold Voltage VTL Enable Input Voltage VIH Min Typ Max Unit Vo = 2.7 V, Io = –0.4 mA 0.2 V Vo = 0.5 V, Io = 8 mA –0.2 V 2.0 VIL 0.8 Input Clamp Voltage VIK II = –10 mA Output Voltage VOH VID*1 = 0.4 V, IO = –0.4 mA VOL VID *1 = IOZ VIE = 0.8 V, VID = –3 V, VO = 2.7 V 40 IOZ VIE = 0.8 V, VID = 3V, VO = 0.5V 40 IIB Vcc = 0 V or 5.25 V Other Input = 0 V Off State Output Current Differential Input Bias Current Enable Input Current –1.5 2.7 –0.4 V, IO = 8 mA V V V 0.5 VI = –10 V –3.25 VI = –3 V –1.5 VI = 3 V 1.5 VI = 10 V 3.25 IIH VI = 5.25 V 100 IIH VI = 2.7 V 20 IIL VI = 0.5 V –100 Short Circuit Output Current IOS *2 VID = 3 V, VO = 0 V Supply Current ICC –15 VIE = 0 V µA mA µA –100 mA 85 mA Note: 1. Not more than one output should be shorted at a time. 500 Ω VOH VOL VID*1 500 Ω 2V 3 HD293486 HD293486 Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Symbol Propagation Delay Time Output Disable Time Output Enable Time Typ Max 28 35 tPLH 27 30 tHZ 26 35 tLZ 27 35 tZH 13 30 tZL 20 30 Conditions tPHL Min CL = 15 pF Unit ns ns ns Switching Time Test Method 1. tPLH , tPHL Test circuit Input Pulse Generator Output CL = 15 pF 1.5 V 2V Notes : 1. The pulse generator has following characteristics: PRR = 1 MHZ, 50 % duty cycle, tr ≤ 6ns, tf ≤ 6ns, Zout = 50 Ω 2. CL includes probe and jig capacitance. Waveforms 3V 1.5 V 1.5 V Input A 0V 3V Input B 1.5 V 1.5 V tPHL 0V VOH tPLH 1.3 V 1.3 V Output VOL 4 HD293486 HD293486 2. tHZ, tZH, tLZ, tZL Test circuit SW 1 –1.5 V Output 2 KΩ 1.5 V Input SW2 5V 5 KΩ Pulse Generator CL = 15 pF SW3 Notes: 1. The pulse generator has following characteristics: PRR = 1 MHZ, 50 % duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, Zout = 50 Ω 2. CL includes probe and jig capacitance. 3. All diodes are 1S2074 H Waveforms (1) tHZ 3V Input 1.5 V 0V tHZ Output VOH 0.5 V SW1 to 1.5 V SW2 CLOSE SW3 CLOSE ≈1.3 V (2) tZH 3V Input 1.5 V 0V Output tHZ VOH SW1 to 1.5 V SW2 OPEN SW3 CLOSE 1.5 V ≈1.3 V 5 HD293486 HD293486 (3) tLZ 3V Input 1.5 V 0V tLZ ≈1.3 V SW1 to –1.5 V SW2 CLOSE SW3 CLOSE Output 0.5 V VOL (4) tZL 3V Input 1.5 V tZL 0V ≈4.5 V Output VOL 6 SW1 to –1.5 V SW2 CLOSE SW3 OPEN