HD74HC149 Overview
The HD74HC149 is priority encoder which has 8 input lines (0 - 7) and 8 output lies (Y0 - Y7). It is the logical bination 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.
HD74HC149 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
