Diodes Incorporated
Back to IO Expanders


AEC-Q100 Grade 2 Low-voltage translating 34-bit I2C-bus I/O Expander

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The PI4IOE5V6534Q is a 34-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the FC-bus interface.

The device provides a simple solution when additional I/Os are needed while keeping interconnections to a minimum. for example, in battery-powered mobile applications for interfacing to sensors, push buttons, keypad, etc.

The expander IC can operate from 1.65 V to 5.5 V on the GPIO-port side and 0.8 V to 3.6 V on the SDA/SCL side. This allows the PI4IOE5V6534Q to interface with next generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power.

The VDD(I2C-bus) in PI4IOESV6534Q provides bidirectional voltage-level translation, and the pin should be connected to the VDD of the external SCL/SDA lines. The voltage level on the GPIO port of the PI4IOE5V6534Q is determined by VDD(P)

At power-on, the I/Os are configured as inputs, however, the system master can enable the I/Os as either inputs or outputs by writing to the I/O direction bits. The data for each input or output is kept in the corresponding Input or Output register. All registers can be read by the system master.

PI4IOE5V6534Q has open-drain interrupt (INT) output pin that goes LOW when the input state of a GPIO-port changes from the input-state default register value. The device also has an interrupt masking feature, which the user can use to mask the interrupt from an individual GPIO-port.


  • Operating power supply voltage range of 8V to 3.6V on the I2C-bus side
  • Allows bidirectional voltage-level translation and GPIO expansion between:
  • 8V to 3.6V SCL/SDA and 1.8/2.5/3.3/5.5V Port
  • Low standby current consumption:
  • 2 μA typical at 3.3 V VDD(P)
  • 5 V tolerant I/O ports and 3.6 V tolerant I2C-bus pins
  • 1 MHz Fast-mode Plus I2C-bus interface
  • Compliant with the I2C-bus Fast-mode plus, Fast-mode and Standard mode
  • I/O Features
  • Output port configurations: bank selectable or pin selectable push-pull or open-drain output stages
  • Interrupt status: read-only register identifies the source of an interrupt
  • I/O programming features:
    • Output drive strength: four programmable drive strengths to reduce rise and fall times in low-capacitance applications
    • Input latch: Input Port register values changes are kept until the Input Port register is read
    • Pull-up/pull-down enable: floating input or pull-up/pull-down resistor enable
    • Pull-up/pull-down selection: 100k-ohm pull-up/pull-down resistor selection
    • Interrupt mask: mask prevents the generation of the interrupt when input changes state to prevent spurious interrupts
    • Interrupt edge specification on a bit-by-bit basis
    • Interrupt individual clear without disturbing other events
    • Read all interrupt events without clear
    • Switch debounce hardware
    • General call software reset
    • I2C software Device ID function
  • Power-on reset
  • Active LOW open-drain interrupt output (INT)
  • Active LOW reset input (RESET)
  • Latch-up tested (exceeds 100mA)
  • Latched Outputs for Directly Driving LEDs
  • AEC-Q100 (Grade 2)
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device 
  • The PI4IOE5V6534Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/
  • Packaging (Pb-free & Green):
  • 46-Pin, Wettable TQFN 4.5x6.5mm (ZLW)

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Automotive
Analog or Digital? Digital
Voltage .8/5.5V
Single Ended Channels 34
Signal Type Single Ended
Configuration 34 bits
Ambient or Junction Temperature (°C) -40 to 105

Related Content


Technical Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

Request Documents