This document describes the features of Harris Semiconductor SCHS158E, including three-state buffered outputs, gated input and output enables, wide operating temperature range, balanced propagation delay and transition times, significant power reduction compared to LSTTL logic ICs, etc.
The CD54HC173, CD74HC173, CD54HCT173 and CD74HCT173 are high‑speed CMOS logic devices that provide a quad D‑type flip‑flop with three‑state buffered outputs. They feature low power consumption, wide operating temperature range, and are suitable for bus‑oriented systems.
The family is offered in several package styles (CERDIP, PDIP, SOIC, SOP, TSSOP) and supports both HC (2 V‑6 V) and HCT (4.5 V‑5.5 V) supply voltage ranges. Detailed electrical and switching specifications, pinouts, and mechanical data are provided.
| Operating Temperature Range | -55 °C to 125 °C |
|---|---|
| Supply Voltage (HC types) | 2 V to 6 V |
| Supply Voltage (HCT types) | 4.5 V to 5.5 V |
| Propagation Delay (HC, CL=50pF) | 200 ns (typ) to 300 ns (max) |
| Input High Voltage (VIH, HC) | 2.0 V (typ) |
The devices operate from –55 °C up to 125 °C.