PI4IOE5V6416RQ2LEX

I/o Expanders Overview

The PI4IOE5V6416RQ2LEX is a low-voltage translating 16-bit I2C-bus I/O expander manufactured by Diodes Incorporated. It supports bidirectional voltage-level translation between SCL/SDA lines and GPIO ports, accommodating supply levels from 1.65V to 5.5V on both sides. The device features a 400kHz I2C interface compliant with fast and standard modes, programmable push-pull or open-drain output stages, and an active LOW open-drain interrupt output. It includes a dedicated RESET input for bus recovery without altering register contents. The component operates within a temperature range of -40°C to +105°C, consumes typical standby currents of 1μA at 3.3V and 1.5μA at 5V, and is housed in a 24-pin TSSOP package.

I/o Expanders Feature Summary

• Bidirectional voltage-level translation allows seamless interfacing between microcontrollers and peripherals operating at different logic voltages (1.8V, 2.5V, 3.3V, or 5V).
• Dedicated hardware reset pin enables I2C bus recovery when the bus is stuck, preserving existing I/O configurations and preventing system errors.
• Programmable output drive strength and pull-up/down resistors provide flexibility in driving various load types while minimizing external component requirements.
• Active LOW interrupt output signals state changes on GPIO inputs, supporting individual port masking to reduce unnecessary interrupts.

I/o Expanders Applications

• Battery-powered mobile applications requiring low standby current consumption.
• Automotive systems requiring AEC-Q100 Grade 2 qualification and PPAP capability.
• Embedded sensor interfaces and keypad scanning where GPIO expansion is needed.
• Push-button interfaces and general-purpose remote I/O expansion for microcontrollers.

I/o Expanders Procurement Notes

Verify that the specific suffix '2LEX' corresponds to the requested packaging configuration, as datasheets may reference generic 'TSSOP' or 'Reel' formats. Confirm AEC-Q100 Grade 2 qualification status if automotive compliance is required. Ensure the supplier provides documentation confirming IATF 16949 manufacturing certification for this specific part number variant.

I/o Expanders Selection Notes

Select this component when bidirectional level shifting between 1.65V and 5.5V domains is necessary alongside 16-bit I/O expansion. Consider the 400kHz speed limit if higher frequency communication is required. Evaluate the need for the hardware reset feature for robust bus recovery in noisy environments. Verify that the 24-pin TSSOP package fits the available PCB footprint constraints.

I/o Expanders Part Context

The PI4IOE5V6416RQ belongs to the PI4IOE5V6 series of I/O expanders designed for low-voltage applications. This series emphasizes power efficiency and flexible voltage translation capabilities. The RQ suffix typically denotes automotive-grade qualification, distinguishing it from commercial variants like the PI4IOE5V6416ALEX which may have different temperature ranges or reliability standards.

I/o Expanders Replacement Considerations

The PI4IOE5V6416ALEX is a related commercial-grade variant within the same family. Verify if the extended temperature range (-40°C to +105°C) and AEC-Q100 qualification of the RQ version are strictly required, as the ALEX version may only support up to +85°C.

I/o Expanders FAQ

How does the RESET pin function compared to a power-on reset?

The RESET pin initializes only the device state machine to recover a stuck I2C bus, leaving internal general-purpose registers unchanged. In contrast, a power-on reset sets all registers to their default values.

What is the maximum I2C clock frequency supported?

The device supports the I2C-bus fast mode with a maximum clock frequency of 400kHz.

Can the interrupt output be masked for specific ports?

Yes, the device includes an interrupt masking feature that allows users to mask interrupts from individual GPIO ports.