TCA6416AZQSR REEL

Overview

The TCA6416AZQSR REEL is a low-voltage 16-bit I2C and SMBus I/O expander featuring voltage translation, interrupt output, reset input, and configuration registers. It operates with VCCI and VCCP supply voltages ranging from 1.65 V to 5.5 V. The device supports bidirectional voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C buses and P-ports. It provides 16 general-purpose parallel I/Os in a 24-pin Microstar BGA Junior package (ZQS). Key electrical characteristics include a maximum operating current of 20 μA at 3.6 V–5.5 V and standby current as low as 7 μA. It supports 400-kHz Fast I2C bus speeds and includes hardware address selection for dual-device bus configurations.

Feature Summary

• Bidirectional voltage-level translation capability between varying I2C bus and P-port supply voltages
• Active-low reset input and open-drain active-low interrupt output for system control
• Hardware address pin enabling two devices on the same I2C/SMBus bus
• Internal power-on reset ensuring all channels initialize as inputs without glitches

Applications

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

Procurement Notes

Verify the specific ZQS package variant matches the required PCB footprint. Confirm that the REEL designation aligns with automated assembly requirements. Ensure the ordering suffix corresponds to the intended temperature range and packaging specifications defined in the manufacturer's orderable addendum.

Selection Notes

Select this component when GPIO expansion is needed alongside voltage translation between different logic levels. Verify that the I2C bus speed requirements do not exceed 400 kHz. Ensure the application can accommodate the 24-pin Microstar BGA Junior package constraints and thermal dissipation needs.

Part Context

This part belongs to the TCA6416A family of low-voltage I/O expanders. It shares functional similarities with other TI I2C expanders but is distinct due to its integrated voltage translation and specific 16-bit configuration. The ZQS suffix indicates the Microstar BGA Junior package type.

Replacement Considerations

TCA6416APWR

FAQ

How does the TCA6416A handle voltage translation?

It allows bidirectional voltage-level translation and GPIO expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C Bus and P-ports by utilizing separate VCCI and VCCP supply pins.

What is the function of the ADDR pin?

The ADDR pin is a hardware address input that allows two TCA6416A devices to be connected to the same I2C/SMBus bus by selecting one of two fixed addresses.

How is the device reset?

The device can be reset via an active-low RESET input pin or by cycling power to the device, which triggers an internal power-on reset.