TCA9535RGER

Overview

The TCA9535RGER is a low-voltage 16-bit I/O expander manufactured by Texas Instruments, designed for I2C and SMBus communication. It operates within a supply voltage range of 1.65 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features an interrupt output pin and configuration registers that allow individual pins to be set as inputs or outputs. It is housed in a VQFN-24 package with SMD/SMT mounting style. The component includes ESD protection rated at 2 kV and functions reliably across a temperature range from -40°C to +85°C.

Feature Summary

• Provides 16 general-purpose parallel input/output ports expandable via two-wire bidirectional I2C bus or SMBus protocol
• Includes configuration registers enabling flexible selection of each port as either input or output
• Features an open-drain, low-active interrupt output pin to signal state changes to the system master

Applications

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

Procurement Notes

Verify the specific suffix 'RGER' corresponds to the VQFN-24 package and reel packaging format when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected variant matches the required operating temperature range and voltage specifications for the target application environment.

Selection Notes

Select this component when a microcontroller requires expansion of I/O lines without consuming additional hardware pins. The wide voltage compatibility allows interfacing with both low-voltage logic and 5V tolerant peripherals. Consider the interrupt capability for efficient event-driven designs rather than continuous polling of input states.

Part Context

This part belongs to the TCA9535 series of low-power I/O expanders. It shares core functionality with variants like TCA9535PWR but differs in package type, utilizing VQFN-24 instead of TSSOP-24. The series is designed for applications needing reliable remote I/O expansion over standard serial interfaces.

Replacement Considerations

TCA9535MRGER serves as a direct functional substitute within the same series, maintaining identical electrical characteristics and pinout compatibility while potentially differing in manufacturing lot or minor packaging details.