ON Semiconductor 74HC157AF Quad 2-Input Multiplexer

The ON Semiconductor 74HC157AF is a high-speed Si-gate CMOS device that is part of the 74HC series. It is a quad 2-input multiplexer with common select and enable inputs. This integrated circuit is designed to provide efficient and reliable performance in a wide range of digital applications. The 74HC157AF is capable of multiplexing digital information from two input sources to one output channel, making it an essential component for data routing applications.

The 74HC157AF features four identical 2-input multiplexers with separate input and output pins for each multiplexer. The common Select input (S) controls which of the data inputs (A or B) is connected to the corresponding output (Y). When the Enable input (E) is low, the selected input is passed to the output, whereas a high level on the Enable input forces the outputs to a high-impedance off state, allowing for connection to a bus without interfering with other devices.

Key specifications of the 74HC157AF include:

• Wide operating voltage range: 2V to 6V
• High noise immunity
• Low power consumption: 20µA max ICC
• High-speed performance: tpd = 15 ns (typ) at Vcc = 5V
• Low ON resistance: Ron = 70Ω (typ) at Vcc = 4.5V, Iout = 4.5mA
• Output drive capability: 10 LSTTL loads

The device comes in a 16-pin plastic surface-mounted package, making it suitable for use in a variety of digital systems, including computers, communication devices, and control systems. The 74HC157AF is also characterized for operation from -40°C to +85°C, ensuring reliable performance in extreme environmental conditions.

Whether you are designing a complex data routing system or simply need a reliable multiplexer for your digital application, the ON Semiconductor 74HC157AF offers a perfect blend of speed, power efficiency, and versatility. Its industry-standard footprint and pinout make it easy to integrate into existing designs or to use in new projects.