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PCF8574

ACTIVE


8-BIT 2.5- TO 5.5-V I2C/SMBUS I/O EXPANDER WITH INTERRUPT

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Data sheet
 * document-pdfAcrobat PCF8574 Remote 8-Bit I/O Expander for I2C Bus datasheet
   (Rev. J) PDF | HTML
   


PCF8574

ACTIVE
Data sheet Order now



PRODUCT DETAILS

Number of I/Os 8 Features Interrupt pin Supply voltage (min) (V) 2.5 Supply
voltage (max) (V) 6 Addresses 8 Rating Catalog Frequency (max) (MHz) 0.1
Operating temperature range (°C) -40 to 85
Number of I/Os 8 Features Interrupt pin Supply voltage (min) (V) 2.5 Supply
voltage (max) (V) 6 Addresses 8 Rating Catalog Frequency (max) (MHz) 0.1
Operating temperature range (°C) -40 to 85
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (DW) 16 106.09 mm² 10.3 x 10.3 TSSOP (PW)
20 41.6 mm² 6.5 x 6.4 TVSOP (DGV) 20 32 mm² 5 x 6.4 VQFN (RGT) 16 9 mm² 3 x 3
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
 * Low Standby-Current Consumption of 10 µA Max
 * I2C to Parallel-Port Expander
 * Open-Drain Interrupt Output
 * Compatible With Most Microcontrollers
 * Latched Outputs With High-Current Drive
   Capability for Directly Driving LEDs
 * Latch-Up Performance Exceeds 100 mA
   Per JESD 78, Class II

 * Low Standby-Current Consumption of 10 µA Max
 * I2C to Parallel-Port Expander
 * Open-Drain Interrupt Output
 * Compatible With Most Microcontrollers
 * Latched Outputs With High-Current Drive
   Capability for Directly Driving LEDs
 * Latch-Up Performance Exceeds 100 mA
   Per JESD 78, Class II



This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C)
is designed for 2.5-V to 6-V VCC operation.

The PCF8574 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 an 8-bit quasi-bidirectional I/O port (P0–P7), 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 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C)
is designed for 2.5-V to 6-V VCC operation.

The PCF8574 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 an 8-bit quasi-bidirectional I/O port (P0–P7), 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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View all 13

Type Title Date * Data sheet PCF8574 Remote 8-Bit I/O Expander for I2C Bus
datasheet (Rev. J) PDF | HTML 09 Mar 2016 Application note I2C Dynamic
Addressing 25 Apr 2019 Application note Choosing the Correct I2C Device for New
Designs PDF | HTML 07 Sep 2016 Application note Understanding and Interpreting
Standard-Logic Data Sheets (Rev. C) 02 Dec 2015 Application note Understanding
the I2C Bus PDF | HTML 30 Jun 2015 Application note Maximum Clock Frequency of
I2C Bus Using Repeaters 15 May 2015 Application note I2C Bus Pull-Up Resistor
Calculation PDF | HTML 13 Feb 2015 Application note Programming Fun Lights With
TI's TCA6507 30 Nov 2007 More literature PCF8574 and PCF8574A Application Clip
18 Aug 2004 More literature I2C Application Clip 19 Jul 2004 Application note
Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul
2004 More literature I2C and Serial Bus Devices Application Clip 10 Jul 2003
Application note Improving System Interrupt Management Using the PCF8574 and
PCF8574A I/O Expande 27 Jul 2001


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Package Pins Download PDIP (N) 16 View options SOIC (DW) 16 View options TSSOP
(PW) 20 View options TVSOP (DGV) 20 View options VQFN (RGT) 16 View options VQFN
(RGY) 20 View options


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