STMicroelectronics 74VHC157 - Quad 2-Channel Multiplexer
The 74VHC157 is a high-performance, Quad 2-Channel Multiplexer from STMicroelectronics, designed to provide efficient data selection to the desired output lines. This integrated circuit is part of the VHC family, which is well-known for its high-speed operation while maintaining low power consumption, making it suitable for a wide range of digital applications.
Each multiplexer in the 74VHC157 has two binary control inputs, A and B, and an enable input, G. When the enable input is high, the multiplexer is disabled, and the outputs are held at a high impedance state, which prevents any unwanted data from passing through. When the enable input is low, the binary control inputs determine which one of the data inputs is selected and passed to the output.
The device features four identical multiplexers, each with its own set of inputs and outputs, allowing for multiple data lines to be controlled simultaneously. The inputs are capable of accepting high-speed TTL-level signals, and the outputs can drive 5V TTL-compatible loads, making the 74VHC157 a versatile component for interfacing with various logic families.
Key features of the 74VHC157 include:
- High-speed: Typical t<sub>PD of 5.2ns at V<sub>CC = 5V
- Low power dissipation: I<sub>CC = 2μA (max) at T<sub>A = 25°C
- Power-down protection provided on inputs
- Low noise: V<sub>OLP = 0.8V (max)
- Pin and function compatible with 74 series 157
With its robust design, the 74VHC157 is suitable for a variety of applications that require data routing, including:
- Function generators
- Digital signal processing
- Computer peripheral switching
- Control systems
- Communication systems
The 74VHC157 is available in a standard 16-pin DIP or SOIC package, ensuring easy integration into both through-hole and surface-mounted designs. STMicroelectronics provides this multiplexer with guaranteed performance specifications over a wide range of operating conditions, making it a reliable choice for critical digital applications.
