Integrated Circuits

PCF8574
Remote 8-bit I/O expander for I2C bus
PDF datasheet
       
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.

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