Diodes Incorporated
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16-bits IO expander with 1MHz I2C

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Product Description

The PI4IOE5V9673 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plus family. The PI4IOE5V9673 provides higher Fast-mode Plus (Fm+) I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWM dimming of LEDs, higheI2C-bus drive (30 mA) so that many more devices can be on the bus without the need for bus buffers, high total package sink capacity (400 mA) that supports having all 25 mA LEDs on at the same time and more device addresses (16) are available to allow many more devices on the bus without address conflicts. The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. The PI4IOE5V9673 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus. The internal Power-On Reset (POR) or software reset sequence initializes the I/Os as inputs.


  • Operation power supply voltage from 2.3V to 5.5V
  • 16-bit remote I/O pins that default to inputs at powerup
  • 1 MHz I2C-bus interface
  • Compliant with the I2C-bus Fast and Standard modes
  • 5.5V tolerant I/Os
  • SDA with 30 mA sink capability for 4000 pF buses
  • Latched outputs with 25 mA sink capability for directly driving LEDs
  • Total package sink capability of 400 mA
  • Active LOW open-drain interrupt output
  • Low standby current
  • 16 programmable slave addresses using 2 address pins
  • ESD protection (4KV HBM and 1KV CDM)
  • Latch-up tested (exceeds 100mA)
  • Offered in three different packages: TSSOP-24 and TQFN 4x4-24

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Analog or Digital? Digital
Voltage 2.2V/5V
Single Ended Channels 16
Signal Type Single Ended
Configuration 16 bits
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques


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

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