Hitachi HD74HC147
The HD74HC147 features priority encoding of the inputs to ensure that only the highest order data line is encoded. The implied decimal zero codition requires no input condition as zero is encoded when all nine data lines are at a high logic level.| Part No. | HD74HC147 |
|---|---|
| Datasheet | HD74HC147 Download |
| Manufacturer |  Hitachi |
| Description | 10-to-4-line Priority Encoder |
| Buy | Stock & Price |
DESCRIPTION
Nine input lines are encoded to a four line BCD output. All data inputs and outputs are active at the low logic level.FEATURES
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● 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 X X X X X X X L 2 H X X X X X X X L H 3 H X X X X X X L H H 4 H X X X X X L H H H 5 H X X X X L H H H H 6 H X X X L H H H H H 7 H X X L H H H H H H 8 H X L H H H H H H H 9 H L H H H H H H H H Outputs D H L L H H H H H H H C H H H L L L L H H H B H H H L L H H L L H A H L H L H L H L H L HD74HC147 Pin Arrangement 4 1 5 2 Inputs 6 3 7 4 8 5 C 6 Outputs B 7 GND 8 B A 9 6 7 8 C D 3 2 1 5 4 16 VCC 15 NC 14 D 13 3 12 2 Inputs 11 1 10 9 9 A Output Output (Top view) 2 HD74HC147 DC Characteristics Ta = 25°C Item Input voltage Symbol VIH Ta = –40 to +85°C Max — — — 0.5 1.35 1.8 — — — — — 0.1 0...
