PCF8574 8-Bit I/O Expander for I2C Bus

The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].

The PCF8574 I2C to Parallel-Port Expander is the optimal solution for quick and easy connection with LCD1602, with only two pins required (SCL and SDA) to interface with the MCU.

This device also features an 8-bit quasi-bidirectional I/O port (P0–P7) with latched outputs, providing high current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.

Features:

• Low Standby-Current Consumption of 10 μA Max
• Easy to connect with the LCD1602
• Input Voltage: 3~5V
• Slave address :: 0x27 (7 Bit Address), 0x4E (8 Bit Address)
• Working Temperature: -40°C~80°C
• Open-Drain Interrupt Output
• On board Potentiometer to adjust LCD contrast

Applications:

1. Telecom Shelters: Filter Units
2. Routers (Telecom Switching Equipment)
3. Personal Computers
4. Personal Electronics
5. Products with GPIO-Limited Processors

Country of origin : China

PCF8574 I2C Expander