TCAL6408PWR

Overview

The TCAL6408PWR is an 8-bit translating I2C-bus and SMBus I/O expander with interrupt output, reset functionality, and Agile I/O configuration registers. It operates with a supply voltage range of 1.08V to 3.6V on both the I2C bus side (VCCI) and the P-port side (VCCP). The device supports Standard-mode (100kHz), Fast-mode (400kHz), and Fast-mode-plus (1MHz) clock frequencies. It features hardware address selection for two devices on the same bus, active-low reset input, and open-drain active-low interrupt output. The P-ports support configurable drive strength, internal pull-up/pull-down resistors, and latchable inputs.

Feature Summary

• Bidirectional voltage-level translation between I2C bus and P-ports across 1.2V, 1.8V, 2.5V, and 3.3V levels
• Agile I/O configuration including programmable drive strength, pull-up/pull-down resistors, and polarity inversion
• Hardware address pin enabling dual device deployment on a single I2C or SMBus bus
• Active-low reset input and open-drain active-low interrupt output for system control

Applications

• Servers
• Routers and telecom switching equipment
• Personal computers
• Products with GPIO-limited processors

Procurement Notes

Verify the specific ordering suffix matches the required package type. The 'PWR' suffix indicates the TSSOP-16 package variant. Confirm that the voltage requirements for VCCI and VCCP align with the 1.08V to 3.6V operating range specified in the datasheet. Ensure compatibility with the target I2C/SMBus protocol speeds before finalizing procurement.

Selection Notes

Select this component when bidirectional voltage translation is required between low-voltage controllers and peripheral devices. The wide supply voltage range allows flexibility in power domain design. Consider the TSSOP-16 package for prototyping or applications where board space is less constrained compared to smaller packages like UQFN or X2QFN.

Part Context

The TCAL6408 is part of Texas Instruments' family of translating I/O expanders designed for I2C and SMBus protocols. It provides general-purpose parallel input/output expansion with advanced configuration capabilities. The device addresses the need for additional I/Os in systems where processor pins are limited, offering a solution for connecting switches, sensors, LEDs, and other peripherals.

Replacement Considerations

Direct replacements within the same family include the TCAL6408APWR. Verify package compatibility and electrical specifications before substitution.