The TCA9537 is a 4-bit I/O expander for the I2C bus and is designed for 1.65-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface.
The system controller can enable the I/Os as either inputs or outputs by writing to the I/O configuration register bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register.
The TCA9537 open-drain interrupt output (INT) is activated when any input differs from its corresponding Input Port register state and is used to indicate to the system controller that an input state has changed.
The system processor can reset the TCA9537 in the event of a timeout or other improper operation by using an I2C soft reset command, which puts the registers in their default state , or with the use of the RESET pin.
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TCA9537 Remote 4-Bit I2C and SMBus I/O Expander with Configuration Registers datasheet | PDF | HTML | 15 Jun 2021 |
| User guide | TCA9536EVM User's Guide | PDF | HTML | 01 Sep 2021 |
For additional terms or required resources, click any title below to view the detail page where available.
The TCA9536 evaluation module provides the user with options to test both the TCA9536 and TCA9537. The evaluation module allows for adjustable pull-up resistors on SDA/SCL as well as LED indicators on power up and the GPOs.
| Package | Pins | Download |
|---|---|---|
| VSSOP (DGS) | 10 | View options |
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