PI4IOE5V6416AZDEX

I/o Expanders Overview

The PI4IOE5V6416AZDEX is a low-voltage translating 16-bit I2C-bus I/O expander manufactured by Diodes Incorporated. It operates within a supply voltage range of 1.65 V to 5.5 V for both the I2C bus and GPIO ports, supporting standard mode (up to 100 kHz) and fast mode (up to 400 kHz) clock frequencies. The device features an active LOW reset input, interrupt output capability, and configurable internal pull-up/pull-down resistances ranging from 50 kΩ to 150 kΩ. It provides ESD protection rated at 2 kV HBM and functions reliably across an operating temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides hardware-level voltage translation between the I2C bus domain and the GPIO port domain, enabling seamless communication between controllers and peripherals operating at different logic levels.
• Integrates comprehensive configuration registers allowing individual control over input/output direction, polarity inversion, and drive strength for each of the sixteen independent pins.
• Supports asynchronous interrupt signaling via a dedicated open-drain INT pin, which can be masked per channel to notify the host controller of specific state changes on the I/O ports.

I/o Expanders Applications

• Embedded systems requiring expansion of general-purpose input/output lines beyond the native capabilities of a microcontroller.
• Interfacing low-voltage digital controllers with higher-voltage peripheral devices or sensors without external level-shifting components.
• Industrial control panels where robust I/O expansion and electrical isolation between bus domains are required for system reliability.

I/o Expanders Procurement Notes

Verify that the ordering suffix matches the required package type, as the ZD suffix specifically denotes the 24-contact TQFN form factor. Confirm RoHS compliance status directly with the manufacturer documentation, as environmental declarations may vary by production batch. Ensure the procurement channel is authorized to guarantee product authenticity and traceability.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O expansion solution is needed with integrated voltage translation capabilities. Compare against other models in the PI4IOE5V6416 family if a different physical footprint, such as TSSOP, is preferred for PCB layout constraints. Evaluate power consumption requirements against the standby and active mode current specifications provided in the datasheet.

I/o Expanders Part Context

This part belongs to the PI4IOE5V6416A series of I/O expanders designed for I2C-based architectures. It shares functional similarities with other members of the family but differs primarily in its physical packaging. The AZDEX variant specifically utilizes the TQFN package, distinguishing it from the ALEX variant which uses TSSOP-24.

I/o Expanders Replacement Considerations

The PI4IOE5V6416ALEX serves as a direct pin-compatible alternative if the TSSOP-24 package is acceptable for the design. Verify that any substitute maintains the same 1.65 V to 5.5 V operating voltage range and I2C interface compatibility to ensure circuit functionality remains unchanged.