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TCA9539A-Q1

ACTIVO

Exp. autom. de E/S I²C/SMBus de 1.65 V a 5.5 V y de 16 bits con reg. de inter., rest. y config.

Detalles del producto

Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin Addresses 4 Rating Automotive Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 125
Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin Addresses 4 Rating Automotive Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 125
TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm)
  • AEC-Q100 Qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • I2C to parallel port expander
  • Open-drain active-low interrupt output
  • Active-low reset input
  • 5V tolerant input and output ports
  • Compatible with most microcontrollers
  • 400kHz Fast I2C bus
  • Polarity inversion register
  • Internal power-on reset
  • No glitch on power up
  • Address by two hardware address pins for use of up to four devices
  • Latched outputs for directly driving LEDs
  • Latch-up performance exceeds 100mA Per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 2000V Human-body model (A114-A)
    • 1000V Charged-device model (C101)
  • AEC-Q100 Qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • I2C to parallel port expander
  • Open-drain active-low interrupt output
  • Active-low reset input
  • 5V tolerant input and output ports
  • Compatible with most microcontrollers
  • 400kHz Fast I2C bus
  • Polarity inversion register
  • Internal power-on reset
  • No glitch on power up
  • Address by two hardware address pins for use of up to four devices
  • Latched outputs for directly driving LEDs
  • Latch-up performance exceeds 100mA Per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 2000V Human-body model (A114-A)
    • 1000V Charged-device model (C101)

The TCA9539A-Q1 is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus protocol). The device can operate with a power supply voltage (VCC) range from 1.65V to 5.5V. The device supports 100kHz (I2C Standard mode) and 400kHz (I2C Fast mode) clock frequencies. I/O expanders such as the device provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.

The features of the device include an interrupt that is generated on the INT pin when an input port changes state. The A0 and A1 hardware selectable address pins allow up to four devices on the same I2C bus. The device can be reset to its default state by cycling the power supply and causing a power-on reset. Also, the device has a hardware RESET pin that can be used to reset the device to its default state.

The TCA9539A-Q1 I2C I/O expander is qualified for automotive applications.

The TCA9539A-Q1 is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus protocol). The device can operate with a power supply voltage (VCC) range from 1.65V to 5.5V. The device supports 100kHz (I2C Standard mode) and 400kHz (I2C Fast mode) clock frequencies. I/O expanders such as the device provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.

The features of the device include an interrupt that is generated on the INT pin when an input port changes state. The A0 and A1 hardware selectable address pins allow up to four devices on the same I2C bus. The device can be reset to its default state by cycling the power supply and causing a power-on reset. Also, the device has a hardware RESET pin that can be used to reset the device to its default state.

The TCA9539A-Q1 I2C I/O expander is qualified for automotive applications.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos TCA9539A-Q1 Automotive Low Voltage 16-Bit I2 C and SMBus Low-Power I/O Expander with Interrupt Output, Reset Pin, and Configuration Registers datasheet PDF | HTML 8/07/2025
Nota sobre la aplicación From TCA9539-Q1 to TCA9539A-Q1: A Seamless Upgrade Path, Designed to Drop-in, Engineered to Do More PDF | HTML 15/01/2026

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

IO-EXPANDER-EVM — IO-EXPANDER-EVM: Módulo de evaluación de expansión de E/S I2C y SMBus

El módulo de evaluación (EVM) de expansión de E/S le permite evaluar la cartera de dispositivos de la línea de expansión de E/S SMBus y I2C de TI . Tanto el TCA6424A como el TCA9539 ‌están instalados en la placa. El formato TSSOP de 24 pines también admite TCA6408A, TCA6416A, TCA9534, TCA9534A (...)

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