STMicroelectronics 74LCX157TTR Multiplexer

The 74LCX157TTR from STMicroelectronics is a high-performance, quad 2-input multiplexer designed for the switching of digital or analog signals in various electronic applications. This integrated circuit is part of the LCX family, which is known for its low voltage operation and compatibility with 5V tolerant inputs, making it an ideal choice for interfacing with both 3.3V and 5V systems.

Constructed with advanced silicon-gate CMOS technology, the 74LCX157TTR offers optimal power dissipation without sacrificing speed. It operates with a supply voltage ranging from 2V to 3.6V, which enables the device to support battery-powered and low-power systems efficiently. The multiplexer also features a 5V tolerant input, which allows for direct interfacing with TTL-level logic signals without the need for external components to shift levels.

The multiplexer's four separate 2-input multiplexers have common select and enable inputs, providing flexibility in routing signals within complex digital systems. Each multiplexer has two inputs (A and B), one output (Y), one select input (S), and an active-low enable input (E). The output Y presents the selected input signal (A or B) when the enable input E is low, and the select input S determines which input is routed to the output.

The 74LCX157TTR is characterized by its high-speed operation, with a typical propagation delay time as low as 5.3ns when powered by a 3.3V supply. This makes it suitable for high-speed data processing and communication systems. Additionally, it features a bus-hold circuitry that eliminates the need for external pull-up or pull-down resistors, simplifying the design and reducing the overall component count.

The device is packaged in a TSSOP-16 (Thin Shrink Small Outline Package), which is known for its compact footprint and suitability for space-constrained applications. The 74LCX157TTR is also fully specified over the extended industrial temperature range (-40°C to +85°C), ensuring reliable performance in harsh operating environments.

Whether used in data routing, signal gating, or multiplexing analog signals, the STMicroelectronics 74LCX157TTR multiplexer offers designers a versatile, high-speed, and power-efficient solution for their electronic designs.