TCA6416AZQSR

Overview

The TCA6416AZQSR is a 24-pin BGA Microstar Junior I/O expander providing 16-bit parallel input/output expansion for bidirectional I2C or SMBus protocols. It operates with supply voltages from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and P-port side (VCCP), enabling voltage translation between 1.8-V, 2.5-V, 3.3-V, and 5-V domains. The device supports standard mode (100 kHz) and fast mode (400 kHz) clock frequencies. Key electrical characteristics include a low standby current of 3 μA, 5-V tolerant I/O ports, and latched outputs capable of directly driving LEDs with high-current drive capability.

Feature Summary

• Bidirectional voltage-level translation between I2C bus and P-ports across multiple voltage domains
• Hardware address pin configuration allowing two devices on the same I2C/SMBus bus
• Active-low reset input and open-drain active-low interrupt output for system control
• Internal power-on reset ensuring all channels initialize as inputs without glitches

Applications

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

Procurement Notes

Verify the ZQS package designation corresponds to the 24-pin BGA Microstar Junior form factor required for your PCB layout. Confirm that the operating temperature range of -40°C to 85°C meets your environmental specifications. Ensure pull-up resistors are correctly sized for the I2C bus capacitance and voltage levels.

Selection Notes

Select this component when GPIO expansion is needed for mixed-voltage systems requiring level shifting between low-voltage processors and 5-V peripherals. Consider the BGA Microstar Junior package if board space is limited, noting its specific thermal resistance values compared to TSSOP or WQFN alternatives. Verify that the 400-kHz I2C speed and interrupt capabilities align with your system's timing requirements.

Part Context

The TCA6416AZQSR belongs to the TCA6416A family of low-voltage I/O expanders manufactured by Texas Instruments. This series provides a solution for extending I/O capabilities in embedded systems where processor pins are insufficient. The ZQS suffix specifically identifies the BGA Microstar Junior package variant within this product line.

Replacement Considerations

Compatible package variants include TCA6416APWR (TSSOP) and TCA6416ARTWR (WQFN). These parts share identical electrical specifications and register maps but differ in physical footprint and thermal performance metrics.