PCF8574 / PCF8574T I²C I/O Expansion Module
Code ABMP011- Weight 5.00g
E-shop price: 2,80 ā¬
| Amount: | 5+ | 10+ |
| Price: | 2,41 | 1,62 |
Minimum order: 1 Repeatability : 1
Amount
| Item location: | ||
|---|---|---|
| Central warehouse in Kaunas | Item is not available (0) | |
| Shop in Vilnius | Item available (2) | |
| Shop in Kaunas | Item is not available (0) | |
Description
š§© PCF8574 / PCF8574T IĀ²C I/O Expansion Module
A module designed to expand input/output (I/O) ports using the IĀ²C interface.
š§ Technical Specifications
- ā Chip: PCF8574 or PCF8574T
- š Interface: IĀ²C (addressable up to 8 modules on the same bus)
- š Operating Voltage: 2.5V ā 6V
- š¦ I/Os: 8-bit bidirectional input/output
- š§ Internal Memory: None ā controlled directly via IĀ²C
- ā” Current per I/O pin: Up to 25 mA
- š Supports Cascading: Yes, via A0, A1, A2 address pins
- š Dimensions: ~21mm x 15mm
- š Standard 2.54mm pitch pin layout
š§ Typical Applications
- Microcontroller projects (Arduino, ESP32, STM32)
- Keypad scanning
- LED control / indicators
- Relay module interfacing
- I/O expansion with minimal wiring
š Typical Connection
MCU (Arduino) PCF8574 Module
---
SDA SDA
SCL SCL
GND GND
VCC VCC (3.3V/5V)
ā¹ļø Notes
- No external pull-up resistors needed ā the module includes internal SDA/SCL pull-up resistors.
- Addressing via A0, A1, A2 pins ā supports up to 8 modules (0x20 ā 0x27).