Product Summary

The PCF8574T is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C). The device consists of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCF8574T has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs.

Parametrics

PCF8574T absolute maximum ratings: (1)supply voltage: -0.5 to +7.0 V; (2)input voltage: VSS - 0.5 to VDD + 0.5 V; (3)DC input current: ±20 mA; (4)DC output current: ±25 mA; (5)supply current: ±100 mA; (6)supply current: ±100 mA; (7)total power dissipation: 400 mW; (8)power dissipation per output: 100 mW; (9)storage temperature: -65 to +150 ℃; (10)operating ambient temperature: -40 to +85 ℃.

Features

PCF8574T features: (1)Operating supply voltage 2.5 to 6 V; (2)Low standby current consumption of 10 mA maximum; (3)I2C to parallel port expander; (4)Open-drain interrupt output; (5)8-bit remote I/O port for the I2C-bus; (6)Compatible with most microcontrollers; (7)Latched outputs with high current drive capability for directly driving LEDs; (8)Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A); (9)DIP16, or space-saving SO16 or SSOP20 packages.

Diagrams

PCF8574T block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
PCF8574T/3,512
PCF8574T/3,512
NXP Semiconductors
I2C Interface IC REMOTE I/O EXPANDER
Data Sheet
0-1280: $0.43
1280-2000: $0.40
2000-5000: $0.38
5000-10000: $0.37
PCF8574T/3,518
PCF8574T/3,518
NXP Semiconductors
I/O Expanders, Repeaters & Hubs I/O EXPANDER I2C
Data Sheet
0-1: $0.89
1-25: $0.80
25-100: $0.71
100-250: $0.62
PCF8574TD
PCF8574TD
NXP Semiconductors
I2C Interface IC REMOTE I/O EXPANDER
Data Sheet
Negotiable 
PCF8574TS/3,112
PCF8574TS/3,112
NXP Semiconductors
I2C Interface IC REMOTE I/O EXPANDER
Data Sheet
0-1: $0.52
1-25: $0.48
25-100: $0.45
100-250: $0.43
PCF8574TS/3,118
PCF8574TS/3,118
NXP Semiconductors
I/O Expanders, Repeaters & Hubs I/O EXPANDER I2C
Data Sheet
0-1: $0.89
1-25: $0.80
25-100: $0.71
100-250: $0.62