This document describes the features and characteristics of Harris Semiconductor SCHS235, including buffered inputs, propagation delay, ESD protection, SCR-Latchup resistance, low power consumption, balanced propagation delays, and AC type features.
The CD74AC139 and CD74ACT139 are dual 2‑to‑4‑line decoders/demultiplexers built with Harris Advanced CMOS Logic technology. Each device contains two independent binary‑to‑one‑of‑four decoders with a single active‑LOW enable input. When the enable is HIGH all outputs stay HIGH; when LOW the selected output goes LOW.
The datasheet provides detailed electrical specifications, absolute maximum ratings, pinout diagrams, functional diagrams, and ordering information, along with a notice on product liability and warranty.
| Typical Propagation Delay | 5.4 ns (Vcc = 5 V, Ta = 25 °C, Cload = 50 pF) |
|---|---|
| Output Drive Current | 24 mA per output |
| ESD Protection | Exceeds 2 kV |
It is a dual 2‑to‑4‑line decoder/demultiplexer.
The typical propagation delay is 5.4 ns at Vcc = 5 V, Ta = 25 °C, and 50 pF load.
Each output can drive up to 24 mA.