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TMUX121
  • TMUX121
  • TMUX121
  • TMUX121

TMUX121

ACTIVE

2-pF, 3.3-V, 2:1 (SPDT), 2-channel, switch with 1.8-V compatible logic

Texas Instruments TMUX121 Product Info

1 April 2026 3

Parameters

Protocols

Analog, I2C, I3C, LVDS, UART

Configuration

2:1 SPDT

Number of channels

2

Bandwidth (MHz)

3300

Supply voltage (max) (V)

3.6

Ron (typ) (mΩ)

3000

Input/output voltage (min) (V)

0

Input/output voltage (max) (V)

3.6

Supply current (typ) (µA)

11

Operating temperature range (°C)

-40 to 125

Crosstalk (dB)

-64

ESD CDM (kV)

1

Input/output continuous current (max) (mA)

100

CON (typ) (pF)

1.7

Off isolation (typ) (dB)

-56

OFF-state leakage current (max) (µA)

10

Ron (max) (mΩ)

8000

Ron channel match (max) (Ω)

0.5

Turnoff time (disable) (max) (ns)

500

Turnon time (enable) (max) (ns)

35000

VIH (min) (V)

1.4

VIL (max) (V)

0.4

Rating

Catalog

Package

UQFN (NKG)-10-2.52 mm² 1.8 x 1.4

Features

  • Compatible with high-speed I 3C signals
  • High performance switch characteristics:
    • Bandwidth (–3 dB): 3.0 GHz
    • R ON (typical): 3 Ω
    • C ON (typical): 1.7 pF
    • T PD (typical): 60 ps
    • T SWEK (typical): 2 ps
  • Low current consumption: 12 µA (typical)
  • Special features:
    • I POFF protection prevents current leakage in Powered-Down state
    • 1.8 V and 3.3 V compatible control inputs (SEL, EN)
  • 3.3 V supply voltage
  • Industrial temperature range: –40 to 125°C
  • Compact 10-pin 1.4 mm × 1.8 mm, UQFN package
  • Compatible with high-speed I 3C signals
  • High performance switch characteristics:
    • Bandwidth (–3 dB): 3.0 GHz
    • R ON (typical): 3 Ω
    • C ON (typical): 1.7 pF
    • T PD (typical): 60 ps
    • T SWEK (typical): 2 ps
  • Low current consumption: 12 µA (typical)
  • Special features:
    • I POFF protection prevents current leakage in Powered-Down state
    • 1.8 V and 3.3 V compatible control inputs (SEL, EN)
  • 3.3 V supply voltage
  • Industrial temperature range: –40 to 125°C
  • Compact 10-pin 1.4 mm × 1.8 mm, UQFN package

Description

The TMUX121 is a high performance bidirectional 2-channel, 2:1 (SPDT) switch that supports both differential and single ended signals. The TMUX121 is an analog passive switch which features power-off protection forcing all I/O pins to be in high-impedance mode when power is not present on the V DD pin. The select and enable pins of the TMUX121 compatible with 1.8 V and 3.3 V control voltage, allowing them to be directly interfaced with the General purpose I/O (GPIO) from low voltage processors. This, along with the low on-resistance and low on capacitance of the device, make the TMUX121 an excellent choice for supporting switching a wide range of analog signals and digital communication protocol standards, including high-speed standards such as I 3C.

The TMUX121 comes in a small 10-pin UQFN package with only 1.8 mm × 1.4 mm in size, which makes it useful when PCB area is limited.

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