3-Ω low RON, 5-V, 2:1 (SPDT) general purpose switch with 3157 pinout


Product details


Configuration 2:1 SPDT Number of channels (#) 1 Power supply voltage - single (V) 1.2, 1.8, 2.5, 3.3, 5 Ron (Typ) (Ohms) 3 ON-state leakage current (Max) (µA) 0.08 Bandwidth (MHz) 250 Operating temperature range (C) -40 to 125 Features 1.8-V compatible control inputs, Break-before-make, Fail-safe logic Input/output continuous current (Max) (mA) 30 Rating Catalog CON (Typ) (pF) 23 Supply current (Typ) (uA) 0.003 open-in-new Find other Analog switches & muxes

Package | Pins | Size

SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 open-in-new Find other Analog switches & muxes


  • Rail-to-rail Operation
  • Bidirectional Signal Path
  • 1.8 V Logic Compatible
  • Fail-safe Logic
  • Control input overvotlage tolerance: 5.5 V
  • Low On-resistance: 3 Ω
  • Wide Supply Range: 1.08 V to 5.5 V
  • -40°C to +125°C Operating temperature
  • Low supply current: 7 nA
  • Break-before-make switching
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The TMUX1248 is a general purpose 2:1, single-pole double-throw (SPDT), switch that supports a wide operating range of 1.08 V to 5.5 V. The device supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins ranging from GND to VDD. The state of the select pin (SEL) controls which of the two sources pins are connected to the drain pin. Additionally, the TMUX1248 has a low supply current of 7 nA which enables the device to be used in a host of handheld or low power applications.

Break-before-make switching prevents both source pins from being enabled simultaneously. This feature adds robustness in the system by preventing source signals from shorting during switching events.

All logic inputs have 1.8 V logic compatible thresholds, allowing for operation with low voltage logic signals. Fail-Safe Logic circuitry allows voltages on the control pins to be applied before the supply pin, or at a higher voltage than the supply pin up to 5.5 V, protecting the device from potential damage.



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Technical documentation

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* Data sheet TMUX1248 3-Ω Low RON, 5-V, 2:1 (SPDT) General Purpose Switch with 1.8-V Logic datasheet Jul. 01, 2021

Design & development

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Hardware development

document-generic User guide

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

  • Simplifies prototyping of SMT IC’s
  • Supports 6 common package types
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document-generic User guide

The EVM-LEADED1 board allows for quick testing and bread boarding of TI's common leaded packages.  The board has footprints to convert TI's D, DBQ, DCT,DCU, DDF, DGS, DGV, and PW surface mount packages to 100mil DIP headers.     

  • Quick testing of TI's leaded surface mount packages 
  • Allows leaded suface mount packages to be plugged into 100mil spaced bread board 
  • Supports TI's 8 most popular leaded packages with a single panel

Design tools & simulation

SCDM259.ZIP (8 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 6 View options

Ordering & quality

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