TCA9539RTWR

低压16位I2C和SMBus低功耗I / O扩展器，带有中断输出，复位和配置寄存器 LOW VOLTAGE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT RESET AND CONFIGURATION REGISTERS

The TCA9539 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 1.65 V to 5.5 V. The device supports 100-kHz I2C Standard mode and 400-kHz I2C Fast mode clock frequencies. I/O expanders such as the TCA9539 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 TCA9539 include an interrupt that is generated on the INT pin whenever an input port changes state. The A0 and A1 hardware selectable address pins allow up to four TCA9539 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 TCA9539 has a hardware RESET pin that can be used to reset the device to its default state.