●Description
●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 pull downs on unused I/O pins when configured as an input and undriven.
●Features
●• 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)
●Applications
●• Servers
●• Routers (Telecom Switching Equipment)
●• Personal Computers
●• Personal Electronics (For Example, Gaming Consoles)
●• Industrial Automation
●• Products With GPIO-Limited Processors
