Products > Integrated Circuits (ICs) > Interface ICs > TCA9539QPWRQ1

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Automotive Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander

  • Package/Case :
  • TSSOP-24
  • Product Categories :
  • Interface ICs
  • RoHs Status:
  • Lead free/RoHS Compliant
  • Marking Code:
  • TCA539Q
  • In-stock:
  • 500


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TCA9539QPWRQ1 Product Details

The TCA9539-Q1 is a 24-pin device that provides 16 bits of generalpurpose parallel input and output (I/O) expansion for the two-line bidirectionalI2C bus (or SMBus protocol). The device can operate with a power supplyvoltage (VCC) range from 1.65 V to 3.6 V. The device supports 100-kHz(I2C Standard mode) and 400-kHz (I2C Fastmode) clock frequencies. I/O expanders such as the TCA9539-Q1 provide a simple solution whenadditional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similardevices.

The features of the TCA9539-Q1 include an interrupt that is generated on theRESET pin that can be used to reset the device to its default state.

The TCA9539-Q1I2C I/O expander is qualified for automotive applications.



  • Qualified for AutomotiveApplications
  • I2C to Parallel PortExpander
  • Open-Drain Active-Low Interrupt Output
  • Active-Low Reset Input
  • 5-V Tolerant Input and Output Ports
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • PolarityInversion Register
  • Internal Power-on-Reset
  • No Glitch on PowerUp
  • Address by Two Hardware Address Pins for Use of up to FourDevices
  • Latched Outputs for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100-mA Per JESD78, ClassII
  • ESD Protection Exceeds JESD22
    • 2000-V Human-Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)

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TCA9539QPWRQ1 Products

TCA9539QPWRQ1 Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of I/O
  • 16
  • Interface
  • I2C, SMBus
  • Interrupt Output
  • Yes
  • Features
  • POR
  • Output Type
  • Push-Pull
  • Current Output Source/Sink
  • 10mA, 25mA
  • Clock Frequency
  • 400kHz
  • Voltage Supply
  • 1.65V ~ 3.6V
  • Operating Temperature
  • -40??C ~ 125??C
  • Mounting Type
  • Surface Mount
  • Package / Case
  • 24-TSSOP (0.173, 4.40mm Width)
  • Supplier Device Package
  • 24-TSSOP

TCA9539QPWRQ1 Documents

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
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Texas Instruments Incorporated designs and manufactures analog technologies, digital signal processing (DSP) and microcontroller (MCU) semiconductors. TI is a leader in semiconductor solutions for analog and digital embedded and applications processing....
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