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PCF8574AN

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
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PCF8574AN General Description

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

The PCF8574A device provides general-purpose remote I/O expansion for most microcontroller families via 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 V_CC is active.

Key Features

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

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