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Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output


Package | PIN: DBQ | 24
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.17
10-24 $1.95
25-99 $1.81
100-249 $1.57
250-499 $1.45
500-749 $1.22
750-999 $1.00
1000+ $0.92


  • I2C to Parallel-Port Expander
  • Open-Drain Interrupt Output
  • Low Standby-Current Consumption of 10 µA Max
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Address by Three Hardware Address Pins for Use of up to Eight Devices
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
  • Current Source to VCC for Actively Driving a High at the Output
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model
    • 200-V Machine Model
    • 1000-V Charged-Device Model

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Texas Instruments  PCF8575DBQR

This 16-bit I/O expander for the two-line bidirectional bus(I2C) is designed for 2.5-V to 5.5-V VCCoperation.

The PCF8575 device provides general-purpose remote I/O expansion for most microcontrollerfamilies by way of the I2C interface [serial clock (SCL), serial data(SDA)].

The device features a 16-bit quasi-bidirectional input/output (I/O)port (P07–P00, P17–P10), including latched outputs with high-current drive capability for directlydriving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of adata-direction control signal. At power on, the I/Os are high. In this mode, only a current sourceto VCC is active.