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PCF8575

ACTIVE

16-bit 2.5- to 5.5-V I2C/SMBus I/O expander with interrupt

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Data sheet

PCF8575

ACTIVE
Data sheet Order now

Product details

Number of I/Os 16 Features Interrupt pin Addresses 8 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Number of I/Os 16 Features Interrupt pin Addresses 8 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm) VQFN (RGE) 24 16 mm² (4 mm × 4 mm) SOIC (DW) 24 159.65 mm² (15.5 mm × 10.3 mm) TVSOP (DGV) 24 32 mm² (5 mm × 6.4 mm) SSOP (DBQ) 24 51.9 mm² (8.65 mm × 6 mm) SSOP (DB) 24 63.96 mm² (8.2 mm × 7.8 mm)
  • I2C to parallel-port expander
  • Open-drain interrupt output
  • Low standby-current consumption of 10µA maximum
  • Compatible with most microcontrollers
  • 400kHz 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 100mA Per JESD 78, class II
  • ESD Protection exceeds JESD 22
    • 2000V Human-body model
    • 200V Machine model
    • 1000V Charged-device model
  • I2C to parallel-port expander
  • Open-drain interrupt output
  • Low standby-current consumption of 10µA maximum
  • Compatible with most microcontrollers
  • 400kHz 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 100mA Per JESD 78, class II
  • ESD Protection exceeds JESD 22
    • 2000V Human-body model
    • 200V Machine model
    • 1000V Charged-device model

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

The PCF8575 device provides general-purpose remote I/O expansion for most microcontroller families 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 directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.

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

The PCF8575 device provides general-purpose remote I/O expansion for most microcontroller families 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 directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet PCF8575 Remote16-BIT I2 C AND SMBus I/O Expander with Interrupt Output datasheet (Rev. I) PDF | HTML Aug 22, 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML Jul 3, 2024
Application note I2C Dynamic Addressing Apr 25, 2019
Application note Choosing the Correct I2C Device for New Designs PDF | HTML Sep 7, 2016
Application note Understanding the I2C Bus PDF | HTML Jun 30, 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters May 15, 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML Feb 13, 2015

Design & development

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Simulation model

PCF8575 IBIS Model

SCPM003.ZIP (60 KB) - IBIS model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 24 Ultra Librarian
VQFN (RGE) 24 Ultra Librarian
SOIC (DW) 24 Ultra Librarian
TVSOP (DGV) 24 Ultra Librarian
SSOP (DBQ) 24 Ultra Librarian
SSOP (DB) 24 Ultra Librarian
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