CD54HC147 9 input priority encoder has the following features: buffered inputs and outputs, typical propagation delay 13ns, maximum operating temperature range -55oC to 125oC, maximum power consumption 150 mW.
The CD54/74HC147 and CD74HCT147 are high‑speed CMOS logic priority encoder ICs that accept up to nine active‑LOW inputs and provide a binary representation on four active‑LOW outputs. The devices feature balanced propagation delay, low power consumption, and wide operating temperature range.
The document provides detailed specifications, absolute maximum ratings, electrical characteristics, switching performance, pinout diagrams, functional diagrams, and an important notice regarding product changes and warranty.
| Typical Propagation Delay | 13 ns at Vcc = 5 V |
|---|---|
| Operating Temperature Range | -55°C to 125°C |
| Supply Voltage Range (HC) | 2 V to 6 V |
| Input High Voltage (VIH) Typical | 2.0 V (HC) / 4.5 V (HCT) |
The typical propagation delay is 13 ns at a supply voltage of 5 V.
The device operates from –55 °C to 125 °C.