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TMUX1574T8RSVR

TITMUX1574T8RSVR

Texas Instruments
Analog Switch ICs 5-V 2:1 (SPDT) 4-c h annel analog switch
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Overview

The TMUX1574T8RSVR is a high-performance, 4-channel, 2:1 (SPDT) analog switch designed for high-speed signal multiplexing. It features a massive 2GHz bandwidth and a wide supply range of 1.5V to 5.5V, making it ideal for routing high-speed digital interfaces like SPI, JTAG, and UART. The device includes integrated fail-safe logic and powered-off protection, ensuring system reliability even when power rails are sequenced or absent.

Why Choose This Part

This switch offers an extremely low on-resistance of 4.5 Ohms and 2GHz bandwidth, minimizing insertion loss and signal distortion for high-speed protocols. Its fail-safe logic and powered-off protection up to 3.6V prevent back-powering and damage during system power-up/down cycles. The tiny 16-pin UQFN package with 0.4mm pitch allows for high-density routing in space-constrained PCB designs.

Applications

SPI/JTAG Multiplexing
Sharing a single controller interface between multiple target peripherals or debug headers.
High-Speed Data Routing
Switching high-frequency signals in servers and data center switches with minimal signal degradation due to its 2GHz bandwidth.
Flash Memory Sharing
Enabling two different processors to access a single eMMC or Flash memory chip.
Level Shifting Interface
Utilizing 1.8V logic compatibility to bridge control signals between different voltage domains.

Key Specifications

Features Break-Before-Make, Isolation, SPI, UART
Applications Analog, Isolation, JTAG, UART
Mounting Type Surface Mount
-3db Bandwidth 2GHz
Package / Case 16-UFQFN
Switch Circuit SPDT
Number of Channels 4
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 16-UQFN (2.6x1.8)
On-State Resistance (Max) 4.5Ohm
Voltage - Supply, Dual (V+/-) 1.5V ~ 5.5V
Voltage - Supply, Single (V+) 1.5V ~ 5.5V
Multiplexer/Demultiplexer Circuit 2:1

Getting Started

Designers should prioritize short trace lengths and impedance matching to leverage the 2GHz bandwidth. Evaluation can be performed using TI generic mux evaluation modules or by prototyping on a 0.4mm pitch UQFN breakout board. Ensure the logic control pins are driven by compatible 1.8V to 5V levels, noting the integrated pull-down resistors.