The M74HC257 is a high-speed CMOS quad 2-channel multiplexer (3-state) fabricated with silicon gate C2MOS technology. It features high speed, low power dissipation, high noise immunity, symmetrical output impedance, balanced propagation delays, and wide operating voltage range.
The M74HC257 is a high‑speed CMOS quad 2‑channel multiplexer (3‑state) that provides independent 2‑channel switching with a common SELECT and ENABLE input. It features low power consumption, high noise immunity, and symmetrical output impedance, making it suitable for a variety of digital switching applications.
The document lists absolute maximum ratings, recommended operating conditions, DC and AC electrical characteristics, mechanical dimensions for DIP‑16 and TSSOP‑16 packages, and test waveforms. It also includes a truth table, pin descriptions, and a test circuit diagram for evaluating propagation delay and output enable/disable times.
| Supply Voltage Range | 2 V to 6 V |
|---|---|
| Maximum Power Dissipation | 500 mW (derated to 300 mW at 85 °C) |
The device operates from 2 V up to 6 V.
Maximum power dissipation is 500 mW (derated to 300 mW at 85 °C).