HD74HC147 10-to-4-line Priority Encoder Description The HD74HC147 features priority encoding of the inputs to ensure that only the highest order data line is encoded.
Nine input lines are encoded to a four line BCD output.
The implied decimal zero codition requires no input condition as zero is encoded when all nine data lines are at a high logic level.
All data inputs and outputs are active at the low logic level.
Features • • • • • High Speed Operation: tpd = 14.
5 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs 1 H X...

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