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PCF8574AN +BOM

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

Manufacturer:

TI
Mfr.Part #:

PCF8574AN
Datasheet:

PCF8574AN Datasheet (PDF)
Number Of I/Os:

8
Features:

Interrupt pin
Supply Voltage (min) (V):

2.5
Supply Voltage (max) (V):

6
EDA/CAD Models:

Request Free CAD Models for PCF8574AN

PCF8574AN Information

Description

The Texas Instruments PCF8574AN is an I2C-bus and SMBus-compatible, 8-bit parallel-input/parallel-output shift register with three-state outputs. It's designed as a universal input/output (I/O) expander for use in embedded systems. The device allows microcontrollers to control and read data from up to eight parallel inputs or outputs without the need for additional I/O pins. The PCF8574AN features low standby current consumption, making it suitable for battery-powered devices. It also has an open-drain interrupt output that can be used to signal events to a microcontroller. The device is compatible with most microcontrollers and can directly drive LEDs due to its high-current drive capability. Overall, the PCF8574AN is a versatile I/O expander that simplifies the design of embedded systems.

Package

The package type of PCF8574AN is a 16-DIP (0.300", 7.62mm).

Pinout

The PCF8574AN is an 8-bit I/O expander with a pin count of 16 (DIP-16 package). The functions of each pin are:

VCC: Power supply input
GND: Ground
SDA: Serial Data Input/Output
SCL: Serial Clock Input
INT: Interrupt Output (open-drain)
A0-A7: Bidirectional I/O lines

The PCF8574AN is a serial-input, parallel-output device that allows for easy expansion of microcontroller-based systems. It can be used to control and monitor up to 8 LEDs or other devices, and has a low standby current consumption of 10 μA max.

Manufacturer

The manufacturer of the PCF8574AN is Texas Instruments (TI). Texas Instruments is a multinational semiconductor company that designs, manufactures, and markets semiconductors and related technologies.

Applications

The PCF8574AN is a I/O expander IC that can be used in various applications where low power consumption, high current drive capability, and fast communication are required. Typical application areas include:

LED indicators for embedded systems
Keyboards and keypad interfaces
Touch panels and human-machine interfaces
Industrial control systems

Its compatibility with most microcontrollers makes it a versatile component suitable for various electronic designs.

Equivalent

The equivalent products of PCF8574AN are:

NXP PCA8574
Microchip MCP23017
STMicroelectronics M24C64

These I2C-based I/O expanders offer similar functionality to the PCF8574AN, including parallel-to-I2C conversion and high-current output drive.

Specifications

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
Package/Case	PDIP (N)-16