MC74HC139A is a dual 1-4 decoder/demultiplexer that utilizes high-performance silicon-gate CMOS technology. It features strong output drive capability, direct interface with CMOS, NMOS, and TTL, and wide operating voltage range.
The MC74HC139A is a dual 1‑of‑4 decoder/demultiplexer with active‑low outputs. It is pin‑compatible with the LS139 and works with standard CMOS, NMOS, and TTL logic levels. The device includes two independent decoders, each providing four active‑low outputs selectable via address inputs and active‑low select lines.
The data sheet provides detailed electrical characteristics, maximum ratings, package dimensions for PDIP‑16, SOIC‑16, TSSOP‑16 and other packages, as well as ordering information and recommended operating conditions for reliable use in high‑speed or heavy‑load applications.
| Output Drive Capability | 10 LSTTL loads |
|---|---|
| Operating Voltage Range | 2.0 V to 6.0 V |
| Low Input Current | 1.0 pA |
| Maximum Supply Voltage (Voc) | 2.0 V to 6.0 V |
| Input Current per Pin | +20 mA |
| Output Current per Pin | +25 mA |
| Power Dissipation (PDIP, 85 °C) | 750 mW |
| Storage Temperature Range | -65 °C to +150 °C |
The device can drive up to 10 LSTTL loads.
It operates from 2.0 V to 6.0 V supply voltage.
The maximum input current per pin is 20 mA.