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Image for illustration purposes only,
refer to technical specifications

Manufacturer Part #

PCF8574T/3,518

PCF8574 Series 2.5 - 6V Remote 8-bit I/O Expander for I2C-bus - SOIC-16

PCF8574T/3,518 Datasheet
ECAD Model: Convert this file for your ECAD tool by downloading the free Library Loader. Learn more about ECAD model.
Mfr. Name:	NXP
Standard Pkg:	Product Variant Information section Available Packaging Package Qty: 2 per Package Style: SOIC-16 Mounting Method: Surface Mount
Date Code:	2151

NXP PCF8574T/3,518 - Technical Attributes

Interface Type:	I2C
Clock Frequency-Max:	100kHz
No of I/O Lines:	8
Supply Voltage-Nom:	2.5V to 6V
Supply Current:	±100mA
Package Style:	SOIC-16
Mounting Method:	Surface Mount

Features & Applications

The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus). The device consists of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCF8574 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus. This means that the PCF8574 can remain a simple slave device.

Features:

Operating supply voltage 2.5 to 6 V
Low standby current consumption of 10 mA maximum
I2C-bus to parallel port expander
Open-drain interrupt output
8-bit remote I/O port for the I2C-bus
Compatible with most microcontrollers
Latched outputs with high current drive capability for directly driving LEDs
Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A)
DIP16, or space-saving SO16 or SSOP20 packages