SN75126

SN75126 QUADRUPLE LINE DRIVER SLLS060B – FEBRUARY 1990 – REVISED MAY 1995 Meets or Exceeds the Requirements of IBM™ System 360/370 Input/Output Interface Specification GA22-6974-3 Minimum Output Voltage of 3.11 V at IOH = – 59.3 mA Fault-Flag Circuit Output Signals Driver Output Fault Fault-Detection Current-Limit Circuit Minimizes Power Dissipation During a Fault Condition Dual Common Enable Individual Fault Flags Designed to Replace the MC3481 description The SN75126 quadruple line driver is designed to meet the IBM 360/370 I/O specification A22-6974-3. The output voltage is 3.11 V minimum (at IOH = – 59.3 mA) over the recommended ranges of supply voltage (4.5 V to 5.95 V) and temperature. Driver outputs use a fault-detection current-limit circuit to allow high drive current but still minimize power dissipation when the output is shorted to ground. The SN75126 is compatible with standard TTL logic and supply voltages. D OR N PACKAGE (TOP VIEW) 1Y 1F 1A 1, 2G 2A 2F 2Y GND 1 2 3 4 5 6 7 8 16 VCC 15 4Y 14 4F 13 4A 12 3,4G 11 3A 10 3F 9 3Y FUNCTION TABLE INPUTS GA LX HH HH OUTPUTS YF LH HH SL H = high level, L = low level, X = irrelevant, S = shorted to ground Fault-flag circuitry is designed to sense and signal a line short on any Y line. Upon detecting an output fault condition, the fault-flag circuit forces the driver output into a low state and signals a fault condition by causing the fault-flag output to go low. The SN75126 can drive a 50-Ω load o...