TCAL6416DGSR

Overview

The TCAL6416DGSR is a 16-bit translating I2C-bus and SMBus I/O expander manufactured by Texas Instruments. It operates with supply voltages ranging from 1.08V to 3.6V on both the VCCI (I2C bus) and VCCP (P-ports) sides. The device supports clock frequencies of 100kHz, 400kHz, and 1MHz. It features an active-low reset input, an open-drain interrupt output, and hardware address pins for dual-device support. The package is a 24-pin VSSOP (DGS).

Feature Summary

• Bidirectional voltage-level translation between I2C bus and P-ports.
• Agile I/O configuration including programmable drive strength and pull-up/pull-down resistors.
• High ESD protection exceeding JESD 22 standards.

Applications

• Servers
• Routers
• Personal computers

Procurement Notes

Verify the ordering suffix DGSR corresponds to the 24-pin VSSOP package with tape-and-reel packaging. Confirm that the specific revision level matches the design requirements. Ensure the component meets RoHS compliance standards for the target market.

Selection Notes

Select this component when interfacing low-voltage processors with peripherals requiring different voltage levels. The wide operating range supports various logic families. Consider the 1MHz Fast-mode Plus capability for high-speed data transfer requirements in complex system architectures.

Part Context

This part belongs to the TCAL6416 family of translating I/O expanders. It provides general-purpose parallel I/O expansion for two-line bidirectional I2C or SMBus protocols. The device enhances I/O performance through agile configuration registers designed to optimize speed and power consumption.

Replacement Considerations

TCA6416A is a related variant within the same product family offering similar functionality with potentially different voltage ranges or package options. Verify pin compatibility and electrical specifications before substitution.

FAQ

What is the maximum current drive capability of the P-ports?

The P-ports can sink up to 25mA per pin when configured as outputs, allowing direct driving of LEDs with external current limiting.

How does the device handle voltage translation?

It allows bidirectional voltage-level translation between the I2C bus side (VCCI) and the P-ports side (VCCP), supporting voltages from 1.08V to 3.6V on both domains.