Datasheet Details
| Part number | HD74HC149 |
|---|---|
| Manufacturer | Renesas |
| File Size | 171.28 KB |
| Description | 8-to-8-line Priority Encoder |
| Datasheet |
 HD74HC149 Datasheet
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General Description
The HD74HC149 is priority encoder which has 8 input lines (0 - 7) and 8 output lies (Y0 - Y7).
It is the logical combination of a HD74HC148 8-3 line priority encoder driving a HD74HC138 3-8 line decoder.
Only one request output can be low at a time.
Key Features
- High Speed Operation: tpd (0 - 7 to Y) = 16 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).
- Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation.
