TCAL6416PWR

Overview

The TCAL6416PWR is a 24-pin TSSOP I/O expander providing 16-bit parallel input/output expansion for bidirectional I2C or SMBus protocols. It operates with supply voltages (VCCI and VCCP) ranging from 1.08V to 3.6V, supporting 100kHz, 400kHz, and 1MHz clock frequencies. The device features hardware address selection for dual-device bus configurations, an active-low reset input, and an open-drain interrupt output. Agile I/O capabilities include programmable drive strength, internal pull-up/pull-down resistors, and configurable push-pull or open-drain outputs.

Feature Summary

• Bidirectional voltage-level translation between the I2C bus side and P-ports across multiple low-voltage domains
• Agile I/O configuration registers enabling programmable drive strength, latchable inputs, and maskable interrupts
• Hardware address pin allowing two devices on the same I2C or SMBus bus
• High ESD protection exceeding JESD 22 standards with 4000V human-body model tolerance

Applications

• Servers
• Routers and telecom switching equipment
• Personal computers and electronics
• Industrial automation systems
• Gaming consoles

Procurement Notes

Verify the specific package suffix 'PWR' corresponds to the 24-pin Thin Shrink Small-Outline Package (TSSOP). Confirm that the ordering information matches the manufacturer's current production data sheet revision. Ensure compatibility with the required operating temperature range of -40°C to 125°C for the intended application environment.

Selection Notes

Select this component when GPIO expansion is required for processors with limited pins. It is suitable for designs needing voltage translation between different logic levels within the 1.08V to 3.6V range. Consider the 1MHz Fast Mode Plus support if high-speed I2C communication is necessary. Verify that the 24-pin TSSOP footprint fits the PCB layout constraints.

Part Context

The TCAL6416 is part of Texas Instruments' translating I/O expander family. It shares functional similarities with the TCA6416A but offers extended voltage translation capabilities down to 1.08V and supports higher clock speeds up to 1MHz. The 'PWR' suffix specifically denotes the TSSOP package variant, distinguishing it from VSSOP or WQFN options.

Replacement Considerations

The TCA6416A is a related device offering similar functionality but with a wider voltage range up to 5.5V and lower maximum clock speed of 400kHz. Verify pinout compatibility and register mapping before substitution, as voltage tolerances and timing characteristics differ between the two models.