Automotive 44-V, low Ron, 2:1 (SPDT) switch with 1.8-V logic


Product details


Configuration 2:1 SPDT Number of channels (#) 1 Power supply voltage - single (V) 12, 16, 20, 36, 44, 5 Ron (Typ) (Ohms) 1.9 ON-state leakage current (Max) (µA) 0.07 Bandwidth (MHz) 38 Operating temperature range (C) -40 to 125 Features 1.8-V compatible control inputs, Break-before-make TI functional safety category Functional Safety-Capable Input/output continuous current (Max) (mA) 210 Rating Automotive CON (Typ) (pF) 146 Supply current (Typ) (uA) 30 open-in-new Find other Analog switches & muxes

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Analog switches & muxes


  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature
  • Functional safety-capable
  • Latch-up immune
  • Dual supply range: ±4.5 V to ±22 V
  • Single supply range: 4.5 V to 44 V
  • Low on-resistance: 2.1 Ω
  • Low charge injection: -10 pC
  • High current support: 330 mA (maximum)
  • 1.8 V logic compatible
  • Fail-safe logic
  • Rail-to-rail operation
  • Bidirectional signal path
  • Break-before-make switching
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The TMUX7219-Q1 is a complementary metal-oxide semiconductor (CMOS) switch with latch-up immunity in a single channel, 2:1 (SPDT) configuration. The device works with a single supply (4.5 V to 44 V), dual supplies (±4.5 V to ±22 V), or asymmetric supplies (such as VDD = 12 V, VSS = –5 V). The TMUX7219-Q1 supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins ranging from VSS to VDD.

The TMUX7219-Q1 can be enabled or disabled by controlling the EN pin. When disabled, both signal path switches are off. When enabled, the SEL pin can be used to turn on signal path 1 (S1 to D) or signal path 2 (S2 to D). All logic control inputs support logic levels from 1.8 V to VDD, ensuring both TTL and CMOS logic compatibility when operating in the valid supply voltage range. Fail-Safe Logic circuitry allows voltages on the control pins to be applied before the supply pin, protecting the device from potential damage.

The TMUX72xx family provides latch-up immunity, preventing undesirable high current events between parasitic structures within the device typically caused by overvoltage events. A latch-up condition typically continues until the power supply rails are turned off and can lead to device failure. The latch-up immunity feature allows the TMUX72xx family of switches and multiplexers to be used in harsh environments.

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Technical documentation

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Type Title Date
* Data sheet TMUX7219-Q1 44-V, Latch-Up Immune, 2:1 (SPDT) Precision Switch with 1.8-V Logic datasheet (Rev. A) Jun. 21, 2021
Functional safety information TMUX7219-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Jun. 14, 2021

Design & development

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Hardware development

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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.     

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