PCF8574

Remote 8-bit I/O expander for I2C bus


A0	1 •	16	Vcc
A1	2	15	SDA
A2	3	14	SCL
P0	4	13	INT
P1	5	12	P7
P2	6	11	P6
P3	7	10	P5
GND	8	9	P4

Pin	Symbol	Description
1	A0	address input 0
2	A1	address input 1
3	A2	address input 2
4	P0	quasi-bidirectional I/O 0
5	P1	quasi-bidirectional I/O 1
6	P2	quasi-bidirectional I/O 2
7	P3	quasi-bidirectional I/O 3
8	GND	supply ground
9	P4	quasi-bidirectional I/O 4
10	P5	quasi-bidirectional I/O 5
11	P6	quasi-bidirectional I/O 6
12	P7	quasi-bidirectional I/O 7
13	INT	interrupt output (active LOW)
14	SCL	serial clock line
15	SDA	serial data line
16	Vcc	supply voltage

Specifications

(typical values under recommended operating conditions, unless specified)

Parameter	Value	Unit
Minimum supply voltage	2.5	V
Maximum supply voltage	6.0	V
LOW level output current, minimum	10	mA
LOW level output current, typical	25	mA
HIGH level output current, minimum	10	µA
HIGH level output current, maximum	300	µA

Notes

I2C address range: 0x40-0x4e (7-bit address range: 0x20-0x27)

Note: Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.