STMicroelectronics 74LVX257TTR Multiplexer

The 74LVX257TTR from STMicroelectronics is a high-performance, low-voltage quad 2-input multiplexer with 3-state outputs. Designed for use in 3.3V systems, it features a 2V to 3.6V operating voltage range, making it suitable for interfacing with 5V systems as well. This multiplexer is part of the LVX family, which is renowned for its low power consumption and high speed operation.

Each multiplexer has two select inputs (S0 and S1), four data inputs (A0 to A3 and B0 to B3), four outputs (Y0 to Y3), and an output enable input (OE). The select inputs determine which set of data inputs (A or B) are connected to the corresponding outputs. When the OE input is low, the selected inputs are connected to the outputs, while a high OE input disables the connection, putting the outputs in a high-impedance state. This feature is particularly useful when multiple outputs need to be connected to a common bus without causing contention.

The 74LVX257TTR is offered in a TSSOP package, which is optimized for reduced space on PCBs. Its low power dissipation and high noise immunity are characteristics that make it ideal for a wide variety of applications, including data routing, signal gating, and multiplexing in communication systems, computers, and data processing equipment.

Key features of the 74LVX257TTR include:

• Low voltage operation: 2V to 3.6V
• High speed: t_PD = 4.8ns (max) at 3.3V
• Power-down protection on inputs and outputs
• Low power dissipation: I_CC = 2µA (max) at TA = 25°C
• ±24mA output drive at 3.3V
• Pin and function compatible with 74 series logic
• Latch-up performance exceeds 300mA
• ESD performance:
  • HBM: >2000V
  • MM: >200V

With its robust design and versatile functionality, the 74LVX257TTR is an excellent choice for designers looking to implement efficient and reliable multiplexing solutions in their low-voltage applications.