STMicroelectronics M74HC257B1R Quad 2-Channel Multiplexer

The M74HC257B1R is a high-speed CMOS Quad 2-Channel Multiplexer fabricated with silicon gate C2MOS technology from STMicroelectronics. It achieves the high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. This device is a versatile addition to any electronic component library, suitable for a wide range of applications in the consumer, automotive, and industrial sectors.

The M74HC257B1R integrates four multiplexers with two binary control inputs, S and E, and an inverting output. Each multiplexer has two inputs (I0 and I1) and one output (Y). The binary control inputs control the data source; when S is held high, I1 is selected, and when S is low, I0 is selected. The E input serves as an enable pin. When E is held high, the Y output is forced to a low state, regardless of the other inputs, effectively providing an additional layer of control.

This device is designed to operate from a power supply range of 2V to 6V, making it compatible with a variety of logic families. It features high noise immunity, typical of CMOS ICs, and a low power consumption, making it ideal for battery-powered devices and energy-sensitive applications. Additionally, it has a balanced propagation delay and transition times, which is crucial for synchronous operations in digital systems.

The M74HC257B1R comes in a DIP-16 (Dual In-line Package) form factor, which is widely used and easy to handle for prototyping and production. The device's pin configuration and package are designed for simple PCB layout and compatibility with standard surface mount and through-hole board designs.

In summary, the M74HC257B1R from STMicroelectronics is a reliable and efficient solution for designers looking to implement data selection or multiplexing functions in their digital systems. Its CMOS technology ensures low power usage while maintaining high-speed operation, and its wide operating voltage range and noise immunity make it a flexible choice for a multitude of electronic applications.