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)