TCAL6416RTWR

Overview

The TCAL6416RTWR is a 16-bit translating I2C-bus and SMBus I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.08V to 3.6V on both the VCCI (I2C bus) and VCCP (P-ports) sides. The device supports Standard-mode (100kHz), Fast-mode (400kHz), and Fast-mode Plus (1MHz) clock frequencies. It features an active-low reset input, open-drain interrupt output, and Agile I/O configuration registers for programmable drive strength and pull-up/down resistors. The component is housed in a 24-pin WQFN package.

Feature Summary

• Bidirectional voltage-level translation between I2C bus and P-ports
• Agile I/O ports with configurable drive strength and internal resistors
• Active-low reset input and open-drain interrupt output

Applications

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

Procurement Notes

Verify the specific RTWR suffix against the manufacturer's orderable addendum to confirm the WQFN-24 packaging and reel quantity specifications. Ensure that the operating voltage requirements align with the system's VCCI and VCCP power rails before finalizing procurement orders.

Selection Notes

Select this component when GPIO expansion is required alongside voltage translation between different logic levels. The dual-supply architecture allows independent powering of the I2C controller and peripheral devices. Consider the thermal resistance characteristics of the WQFN package if high current drive or dense PCB layouts are anticipated.

Part Context

This part belongs to the TCAL6416 family of translating I/O expanders. The RTWR suffix specifically denotes the WQFN-24 package variant. Other variants in the series include TSSOP and VSSOP packages, which share identical electrical functionality but differ in physical dimensions and thermal performance metrics.

Replacement Considerations

Direct substitutes within the same family include parts with different package suffixes such as TCAL6416PW or TCAL6416DGS. Cross-family replacements like PCA9535 or TCA9535 offer similar I2C expansion but lack the translating voltage capability and Agile I/O features.