TCA9535MRGER

Overview

The TCA9535MRGER is a low-power 16-bit I/O expander from Texas Instruments, designed for I2C and SMBus communication. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting flexible integration into various system architectures. The device features an interrupt output capability and includes configuration registers for setting input or output modes. It utilizes a VQFN-24 package suitable for surface-mount applications. Key electrical specifications include a maximum clock frequency of 400 kHz and an operating temperature range from -40°C to +85°C. The component draws a typical operating current of 22 µA.

Feature Summary

• Supports I2C and SMBus protocols for serial communication with host controllers
• Provides 16 general-purpose parallel input/output ports expandable via hardware address pins
• Includes dedicated interrupt output pin for efficient event-driven monitoring
• Features configurable polarity inversion registers for signal logic adjustment

Applications

• Server systems requiring additional GPIO management
• Telecommunication exchange equipment and routers
• Personal computers and consumer electronics such as game consoles
• Industrial automation control panels

Procurement Notes

Verify the specific suffix MRGER against the manufacturer's official datasheet to confirm the VQFN-24 package type and reel packaging details. Ensure compatibility with the target board's thermal requirements and ESD protection standards before finalizing procurement orders.

Selection Notes

Select this component when a wide supply voltage range starting at 1.65 V is required compared to standard 2.3 V variants. Confirm that the VQFN-24 footprint matches the PCB layout constraints. Verify that the 400 kHz I2C speed meets the system's timing requirements for data acquisition.

Part Context

This part belongs to the TCA9535 series of low-voltage I/O expanders. It shares functional similarities with the PCA9535 but offers a lower minimum operating voltage of 1.65 V versus 2.3 V. The MRGER suffix specifically denotes the VQFN-24 package variant, distinguishing it from SSOP or TSSOP versions in the same family.

Replacement Considerations

The PCA9535RGER serves as a functional substitute but requires a minimum supply voltage of 2.3 V instead of 1.65 V. Verify that the application circuit can tolerate this higher voltage threshold before implementing any cross-series replacement.