PI4IOE5V6416Q2LEX

I/o Expanders Overview

The PI4IOE5V6416Q2LEX is a low-voltage translating 16-bit I2C-bus I/O expander manufactured by Diodes Incorporated. It operates with supply voltages ranging from 1.65 V to 5.5 V on both the I2C bus and GPIO ports, supporting standard mode (up to 100 kHz) and fast mode (up to 400 kHz) communication. The device features an active LOW reset input, configurable polarity inversion, interrupt output, and programmable pull-up/pull-down resistors. It is housed in a 24-pin TSSOP package and complies with AEC-Q100 Grade 2 automotive standards.

I/o Expanders Feature Summary

• Provides voltage-level translation between the I2C bus domain and the GPIO port domain for seamless interoperability across different power rails.
• Includes an active LOW reset input that initializes all I/Os to inputs and clears internal registers upon assertion.
• Features an open-drain interrupt output pin that signals state changes on configured input pins to the host controller.

I/o Expanders Applications

• Automotive infotainment systems requiring robust I/O expansion under strict temperature and reliability conditions.
• Industrial control interfaces connecting microcontrollers to peripheral devices operating at varying logic levels.
• Embedded systems needing extended general-purpose input/output capabilities via a minimal two-wire serial interface.

I/o Expanders Procurement Notes

Verify the specific ordering suffix 'Q2LEX' against official Diodes Incorporated documentation to confirm automotive compliance, AEC-Q100 Grade 2 qualification, lead-free status, and tape-and-reel packaging specifications. Ensure the procurement channel is authorized to guarantee product authenticity and traceability for qualified components.

I/o Expanders Selection Notes

Select this component when designing systems that require bidirectional level shifting between 1.65 V and 5.5 V domains using an I2C interface. Consider the 24-pin TSSOP package constraints and ensure adequate decoupling capacitance near the VDD(I2C_bus) and VDD(P) pins to maintain signal integrity during high-speed switching operations.

I/o Expanders Part Context

This part belongs to the PI4IOE5V6416 family of I/O expanders. The 'Q' suffix indicates automotive compliance, while '2' specifies AEC-Q100 Grade 2 qualification. The 'LEX' suffix denotes lead-free, green packaging in a tape-and-reel format. It shares functional similarities with non-automotive variants but meets stricter automotive reliability standards.

I/o Expanders Replacement Considerations

Direct substitutes include other PI4IOE5V6416 variants without the Q2LEX suffix if automotive qualification is not required. Verify pin compatibility and register mapping before replacing with generic I2C expanders, as drive strength and internal pull configurations may differ.

I/o Expanders FAQ

How does the RESET pin function?

The RESET pin is active LOW. When asserted, it resets all internal registers to their power-on defaults and sets all I/O ports to inputs. It must be pulled up to VDD(I2C_bus) if not actively driven.

What is the purpose of the ADDR pin?

The ADDR pin allows selection of one of four slave addresses for the I2C bus. It should be connected directly to VDD(P) or ground to set the address bits A0 and A1.

Can the device operate with different voltages on its two power domains?

Yes, the PI4IOE5V6416Q supports independent supply voltages for the I2C bus (VDD(I2C_bus)) and the GPIO ports (VDD(P)), enabling low-voltage translation between dissimilar logic families.