TCA9536ADTMR

Overview

The TCA9536ADTMR is a remote 4-bit I/O expander for the I2C and SMBus bus, manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and supports Fast mode plus clock frequencies up to 1 MHz. The device features five-volt tolerant I/O ports and includes configuration registers, input/output data registers, and a polarity inversion register. It provides an open-drain interrupt output capability when pin P3 is repurposed via the special function register. The component is housed in an X2SON-8 package with dimensions of 1.35 mm by 0.80 mm.

Feature Summary

• Supports software reset functionality via I2C general call commands to restore default register states.
• Features software-enabled internal pull-up resistors on P ports that can be selectively disabled.
• Provides latched outputs with high-current drive capability suitable for directly driving LEDs.
• Includes noise filters on SCL and SDA inputs to enhance signal integrity.

Applications

• Wearable electronics
• Mobile phones
• Gaming consoles

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current orderable addendum to confirm package type and tape/reel specifications. Ensure the procurement documentation matches the required ESD protection levels and operating temperature ranges defined in the official datasheet. Cross-reference the part number with the latest revision history to avoid obsolete components.

Selection Notes

Select this component when a compact 4-bit expansion solution is required for low-voltage microcontroller systems. The wide supply voltage range allows compatibility with various logic levels. Consider the X2SON-8 package size constraints and thermal resistance characteristics during PCB layout planning. Verify that the I2C bus speed requirements do not exceed the Fast mode plus limitations.

Part Context

This component belongs to the TCA9536 series of I/O expanders designed for I2C communication. It serves as a peripheral interface device to extend the GPIO capabilities of host processors. The ADTMR suffix indicates a specific tape and reel packaging variant intended for automated surface-mount assembly processes.

Replacement Considerations

The PCA9536DRG4 is a documented alternative from Texas Instruments offering similar I2C functionality. Note that the PCA9536 lacks an interrupt output feature and utilizes a SOIC-8 package instead of the X2SON-8 form factor. Verify pinout compatibility and register mapping differences before substitution.