Product details


Configuration 2:1 SPDT Number of channels (#) 6 Power supply voltage - single (V) 1.8, 2.5, 3.3 Ron (Typ) (Ohms) 4.4 ON-state leakage current (Max) (µA) 7 Bandwidth (MHz) 240 Operating temperature range (C) -40 to 85 Features Powered-off protection, Break-before-make, Supports SPI signals, Supports JTAG signals, 1.8-V compatible control inputs Input/output continuous current (Max) (mA) 50 Rating Catalog CON (Typ) (pF) 21.5 Supply current (Typ) (uA) 0.001 open-in-new Find other Analog switches & muxes

Package | Pins | Size

TSSOP (PW) 24 34 mm² 4.4 x 7.8 WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other Analog switches & muxes


  • 1.65-V to 3.6-V Single-Supply Operation
  • Isolation in Power-Down Mode, VCC = 0
  • Low-Capacitance Switches, 21.5 pF (Typical)
  • Bandwidth Up to 240 MHz for High-Speed
    Rail-to-Rail Signal Handling
  • Crosstalk and OFF Isolation of –62 dB
  • 1.8-V Logic Compatible Control Inputs
  • 3.6-V Tolerant Control Inputs
  • Latch-Up Performance Exceeds 100-mA Per JESD 78, Class II
  • ESD Performance Tested Per JESD 22
    • 2500-V Human-Body Model (A114-B, Class II)
    • 1500-V Charged-Device Model (C101)
  • ESD Performance: NC/NO Ports
    • ±6-kV Contact Discharge (IEC 61000-4-2)
  • 24-WQFN (4.00 mm × 4.00 mm), 24-BGA
    (3.00 mm × 3.00 mm) and 24-TSSOP
    (7.90 mm × 6.60 mm) Packages

All trademarks are the property of their respective owners.

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The TS3A27518E is a bidirectional, 6-channel,
1:2 multiplexer-demultiplexer designed to operate from 1.65 V to 3.6 V. This device can handle both digital and analog signals, and can transmit signals up to VCC in either direction. The TS3A27518E has two control pins, each controlling three 1:2 muxes at the same time, and an enable pin that put all outputs in high-impedance mode. The control pins are compatible with 1.8-V logic thresholds and are backward compatible with 2.5-V and 3.3-V logic thresholds.

The TS3A27518E allows any SD, SDIO, and multimedia card host controllers to expand out to multiple cards or peripherals because the SDIO interface consists of 6-bits: CMD, CLK, and Data[0:3] signals. This device will support other 6-bit interfaces such a qSPI. The TS3A27518E has two control pins that give additional flexibility to the user. For example, the ability to mux two different audio-video signals in equipment such as an LCD television, an LCD monitor, or a notebook docking station.

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Technical documentation

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Type Title Date
* Data sheet TS3A27518E 6-channel (qSPI), 1:2 multiplexer/demultiplexer with integrated IEC L-4 ESD and 1.8-V logic compatible control inputs datasheet (Rev. E) Mar. 22, 2019
Application note Multiplexers and Signal Switches Glossary (Rev. A) Jun. 09, 2021
Application note 1.8 V Logic for Muxes and Signal (Rev. A) Jan. 06, 2021
Application note Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) Jan. 06, 2021
Application note Enabling SPI-Based Flash Memory Expansion by Using Multiplexers (Rev. A) Jan. 06, 2021
Application note Selecting the Right Texas Instruments Signal Switch (Rev. B) Apr. 02, 2020
Application note Preventing Excess Power Consumption on Analog Switches Jul. 03, 2008
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004

Design & development

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Hardware development

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

SCDM128.ZIP (101 KB) - IBIS Model
SCDM129.ZIP (126 KB) - HSpice Model

CAD/CAE symbols

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TSSOP (PW) 24 View options
WQFN (RTW) 24 View options

Ordering & quality

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