TI TCA9535RTWR

The TCA9535 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 ranging from 1.65 V to 5.5 V. The TCA9535 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active-high or active-low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The TCA9535 is identical to the TCA9555, except that the TCA9535 does not include the internal I/O pull-up resistor, which requires pull-ups and pulldowns on unused I/O pins when configured as an input and undriven.

• I²C to Parallel Port Expander
• Wide Power Supply Voltage Range of 1.65 V to 5 V
• Low Standby-Current Consumption
• Open-Drain Active-Low Interrupt Output
• 5-V Tolerant I/O Ports
• 400-kHz Fast I²C Bus
• Polarity Inversion Register
• Address by Three Hardware Address Pins for Use of up to Eight Devices
• Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22 2000-V Human-Body Model (A114-A) 1000-V Charged-Device Model (C101)

• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics (For Example, Gaming Consoles)
• Industrial Automation Products With GPIO-Limited Processors