This document describes the features and characteristics of Harris Semiconductor SCHS173A, including buffered inputs and outputs, four operating modes, typical propagation delay, etc.
The CD54/74HC259 and CD54/74HCT259 are high‑speed CMOS 8‑bit addressable latch devices offering buffered inputs and outputs, four operating modes, and low power consumption. The datasheet provides detailed information on features, pin configurations, electrical characteristics, and recommended test circuits.
Key sections include Features, Description, Ordering Information, Pinout diagrams, Absolute Maximum Ratings, DC Electrical Specifications, Switching Specifications, and Test Waveforms. An Important Notice at the end outlines TI's warranty and liability statements.
| Typical Propagation Delay | 15 ns |
|---|---|
| Fanout – Standard Outputs | 10 LSTTL Loads |
| Fanout – Bus Driver Outputs | 15 LSTTL Loads |
| 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 |
| High Level Input Voltage (VIH) – HC | 2.0 V (typical) |
The typical propagation delay is 15 ns at Vcc = 5 V, CL = 15 pF, and 25 °C.
Standard outputs can drive up to 10 LSTTL loads.
The device operates from –55 °C to 125 °C.
Add the suffix 96 to the full part number to obtain the tape‑and‑reel variant.