PCF8574

Part: PCF8574; PCF8574A from NXP B.V.

Type: Remote 8-bit I/O expander for I2C-bus with interrupt

Key Specs:

• I2C-bus interface: 100 kHz
• Operating supply voltage: 2.5 V to 6 V
• Low standby current: 2.5 µA (typical)
• Total package sink capability: 80 mA
• Operating temperature range: -40 °C to +85 °C
• ESD protection HBM: 2000 V
• ESD protection CDM: 1000 V

Features:

• I2C-bus to parallel port expander
• 8-bit remote I/O pins that default to inputs at power-up
• Latched outputs directly drive LEDs
• Active LOW open-drain interrupt output
• Eight programmable slave addresses using three address pins
• Internal Power-On Reset (POR)

Applications:

• LED signs and displays
• Servers
• Key pads
• Industrial control
• Medical equipment
• PLC
• Cellular telephones
• Mobile devices
• Gaming machines
• Instrumentation and test measurement

Package:

• DIP16: 16 leads (300 mil)
• SO16: 16 leads; body width 7.5 mm
• SSOP20: 20 leads; body width 4.4 mm

• I 2C-bus to parallel port expander
• 100 kHz I2C-bus interface (Standard-mode I2C-bus)
• Operating supply voltage 2.5 V to 6 V with non-overvoltage tolerant I/O held to VDD with 100 A current source
• 8-bit remote I/O pins that default to inputs at power-up
• Latched outputs directly drive LEDs
• Total package sink capability of 80 mA
• Active LOW open-drain interrupt output
• Eight programmable slave addresses using three address pins
• Low standby current (2.5 A typical)
• 40 C to +85 C operation
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

• Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
• Packages offered: DIP16, SO16, SSOP20

• LED signs and displays
• Servers
• Key pads
• Industrial control
• Medical equipment
• PLC
• Cellular telephones
• Mobile devices
• Gaming machines
• Instrumentation and test measurement

Table 3. Pin description

| Symbol | Pin | | Description | |----------|-------------|--------------|-------------------------------|--|--|--| | | DIP16, SO16 | SSOP20 | | A0 | 1 | 6 | address input 0 | | A1 | 2 | 7 | address input 1 | | A2 | 3 | 9 | address input 2 | | P0 | 4 | 10 | quasi-bidirectional I/O 0 | | P1 | 5 | 11 | quasi-bidirectional I/O 1 | | P2 | 6 | 12 | quasi-bidirectional I/O 2 | | P3 | 7 | 14 | quasi-bidirectional I/O 3 | | $V_{SS}$ | 8 | 15 | supply ground | | P4 | 9 | 16 | quasi-bidirectional I/O 4 | | P5 | 10 | 17 | quasi-bidirectional I/O 5 | | P6 | 11 | 19 | quasi-bidirectional I/O 6 | | P7 | 12 | 20 | quasi-bidirectional I/O 7 | | INT | 13 | 1 | interrupt output (active LOW) | | SCL | 14 | 2 | serial clock line | | SDA | 15 | 4 | serial data line | | $V_{DD}$ | 16 | 5 | supply voltage | | n.c. | - | 3, 8, 13, 18 | not connected |

Table 8. Thermal characteristics