60-mΩ, 4.5-V, autonomous audio acessory detection & configuration switch with I2C


Product details


Protocols Analog Audio Configuration audio jack Number of channels (#) 1 Bandwidth (MHz) 150 Supply voltage (Max) (V) 4.5 Supply voltage (Min) (V) 2.5 Ron (Typ) (Ohms) 0.05 Input/ouput voltage (Min) (V) -3 Input/ouput voltage (Max) (V) 4.5 Supply current (Typ) (uA) 11 ESD HBM (Typ) (kV) 2 Operating temperature range (C) -40 to 85 ESD CDM (kV) 0.5 ICC (Typ) (uA) 0.5 Input/output continuous current (Max) (mA) 500 Off isolation (Typ) (dB) -90 OFF-state leakage current (Max) (µA) 1 Propagation delay (ns) 1000 Ron (Max) (Ohms) 30 Turn off time (disable) (Max) (ns) 5000 Turn on time (enable) (Max) (ns) 35000 VIH (Min) (V) 1.2 VIL (Max) (V) 0.4 open-in-new Find other Protocol-specific switches/muxes

Package | Pins | Size

DSBGA (YFF) 16 0 mm² 1.796 x 1.796 VQFN (RVA) 16 12 mm² 3.5 x 3.5 open-in-new Find other Protocol-specific switches/muxes


  • Supple Range of 2.5 V to 4.5 V
  • Accessory Insertion/Removal Detection with
    Adjustable De-bounce Timings
  • Accessory Configuration Detection:
    • Stereo 3-pole Headphone
    • 4-pole Standard Headset with MIC on Sleeve
    • 4-pole OMTP Headset with MIC on Ring2
  • Key Press Detection for Up to 4 Keys
  • Ultra Low Ground FET RON of 60 mΩ
  • Power Off Noise Removal
  • Isolation of MICBIAS From Audio Jack to Remove
    Click/Pop Noise
  • Integrated Codec Sense Line
  • Manual I2C Control
  • FM Transmission Capability
  • Dual Small Package Options
    • 16 Pin DSBGA
    • 16 Pin QFN
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The TS3A227E is an autonomous audio accessory detection and configuration switch that detects 3-pole or 4-pole audio accessories and configures internal switches to route the signals accordingly.

The internal ground FETS of the TS3A227E have an ultra-low RON of 60 mΩ to minimize crosstalk impact. The ground FETs are also designed to pass FM signals, making it possible to use the ground line of the accessory as an FM antenna in mobile audio applications.

Internal isolation switches allow the TS3A227E to remove the click/pop noise that can be generated during and insertion or removal of an audio accessory. In addition depletion FETs prevent a floating ground while the device is unpowered, removing the humming noise present when leaving accessories plugged into an unpowered system.

A low-power sleep mode is provided which shuts down internal circuitry to achieve very low quiescent current draw when no headset is inserted.

The TS3A227E features integrated key press detection for detecting up to 4 keys with press and release support.

Manual I2C control allows the TS3A227E to adapt to application needs by providing control over de-bounce settings and switch states.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet TS3A227E Autonomous Audio Accessory Detection and Configuration Switch datasheet (Rev. B) Feb. 05, 2015
Technical articles Roll with the design punches and overcome power-sequencing challenges Jul. 29, 2019
Application notes Support Selfie Sticks Using a TS3A227E Audio Jack Switch Mar. 04, 2016
User guides TS3A227E-EVM User's Guide Dec. 15, 2014
Application notes Preventing Excess Power Consumption on Analog Switches Jul. 03, 2008
Application notes Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TS3A227E-EVM is an evaluation module for TI’s autonomous audio-accessory switch with adjustable debounce settings, ultralow RON ground FETs, depletion FETs, key-press detection and manual I2C control.  The module lets you easily evaluate the device performance and functionality (...)

  • Fully powered by the LaunchPad™ development kit for TI's MSP430™ MCU with no external power supply requirements
  • Fully-interactive GUI for testing and evaluation
  • On-board keys let you test key-press functionality
  • On-board connections let headset manufacturers to test key-press designs on EVM

Software development

Linux Driver for TS3A227E
TS3A227ESW-LINUX The Linux driver supports the TS3A227E Autonomous Audio Accessory Detection and Configuration Switch. The Linux driver supports communication through the I2C bus and interfaces with the Linux Sound SoC Component framework.


Linux Mainline Status

Available in Linux Main line: Yes
Available through (...)

Design tools & simulation

SCDM167.ZIP (95 KB) - IBIS Model

Reference designs

USB Type-C Audio Adapter Accessory Mode Reference Design
TIDA-00565 — The USB Type-C™ audio adapter accessory mode reference design provides the solution for transmitting analog audio through the USB Type-C interface.  This reference design demonstrates how analog audio can be transmitted to system peripherals using the USB Type-C standard audio adapter (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YFF) 16 View options
VQFN (RVA) 16 View options

Ordering & quality

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