Hitachi HD74HC148
The HD74HC148 encodes eight data lines to three-line (4-2-1) binary (octal). The data inputs and outputs are active at the low logic level.| Part No. | HD74HC148 |
|---|---|
| Datasheet | HD74HC148 Download |
| Manufacturer |  Hitachi |
| Description | 8-to-3-line Octal Priority Encoder |
| Buy | Stock & Price |
DESCRIPTION
Cascading circuitry (enable input EI and enable output EO) is provided to allow octal expansion without the need for external circuitry.FEATURES
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● High Speed Operation: tpd (0 - 7 to A0 - A2) = 15 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 EI H L L L L L L L L L H : L : X : 0 X H X X X X X X X L 1 X H X X X X X X L H High level Low level Irrelevant 2 X H X X X X X L H H 3 X H X X X X L H H H 4 X H X X X L H H H H 5 X H X X L H H H H H 6 X H X L H H H H H H 7 X H L H H H H H H H Outputs A2 H H L L L L H H H H A1 H H L L H H L L H H A0 H H L H L H L H L H GS H H L L L L L L L L EO H L H H H H H H H H HD74HC148 Pin Arrangement 4 1 5 2 Inputs 6 3 7 4 EI 5 A2 6 Outputs A1 7 GND 8 (Top view) A1 A0 0 5 6 7 EI A2 4 EO GS 3 2 1 16 VCC 15 EO Outputs 14 GS 13 3 12 2 Inputs 11 1 10 0 9 A0 Output 2 HD74...
