TCA9539 - Texas Instruments

TCA9539 Low Voltage 16-Bit I2C and SMBUS Low-Power I/O Expander

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 ex.

Features

•1 I2C to Parallel Port Expander
• Low Standby-Current Consumption
• Open-Drain Active-Low Interrupt Output
• Active-Low Reset Input
• 5-V Tolerant I/O Ports
• Compatible With Most Microcontrollers
• 400-kHz Fast I2C Bus
• Input and Output Configuration Register
• Polarity Inversion Register
• Internal Power-on Reset
• No Glitch on Power Up
• Noise Filter on SCL and SDA Inputs
• Address by Two Hardware Address Pins for Use of up to Four Devices
• Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protec.