Texas Instruments IC XPNDR 400KHZ I2C SMBUS 8SOIC PCA9536DR

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The PCA9536DR is a 4-bit I/O expander from Texas Instruments, designed for 2.3V to 5.5V operation and interfacing over the I2C or SMBus at up to 400 kHz. Packaged in an 8-pin SOIC(D) form factor, this device allows for remote control of four digital lines through configuration registers accessible via the I2C interface. It's suitable for expanding the number of I/Os on a microcontroller in space-constrained applications and is available as a new component with immediate shipment from suppliers like DigiKey.