- 【High-Performance I2C I/O Expander】 8-bit quasi-bidirectional I/O ports; 100kHz I2C communication speed; 2.5V to 6V operating voltage; compatible with for for Arduino and STM32 platforms
- 【Reliable Reliability】 Wide temperature range -40°C to +85°C; low standby current ≤2.5µA; robust anti-interference design for stable operation in complex Settings
- 【Easy Cascading Expansion】 Supports up to 8 modules cascaded for 64 I/O channels; 3-bit hardware address configuration; simple DIP switch setup for quick deployment
- 【Low Power Consumption】 Working current ≤40µA; 2000mAh battery life in sleep mode; suitable for energy-efficient embedded systems and IoT applications
- 【Comprehensive Protection Features】 Integrated overcurrent and thermal shutdown protection; supports resistive and inductive load driving with external components; clear documentation for easy integration
From the brand MusRock - Hardware Made Simple One-stop shop MusRock is a larger manufacturer and retailer of specialised electronic components. Products cover Arduino expansion boards, power modules, IR modules, relay modules, boost/buck modules, breadboards, sensors, LEDs, LCDs, diodes, transistors, Dupont wires, crystals, switches, heatsinks, motors, as well as expansion boards for Arduino, Raspberry Pi and other platforms.One-stop shop for many small parts. MusRock Hardware Made Simple, Innovation Freedom Ten years of focus on electronic modularity Engineer's preferred module brand Relay Module
Product description Product Parameters Model PCF8574T I2C Expansion Module Core Chip NXP PCF8574T ( Reliable, -40℃~+85℃) Input Voltage 2.5V–6V DC (3.3V/5V Compatible) I/O Ports 8 Quasi-Bidirectional (P0–P7) Communication I2C Bus (100kHz), 3-bit Address (A0/A1/A2) Interrupt Output Open-Drain INT (Active Low) Drive Capability 25mA/Port, 80mA Total Power Consumption <40µA (Working), <2.5µA (Standby) Size 37.5×16.7mm, DIP Switch Address Config Key Features PCF8574T I2C Expansion Module – 8-bit I/O Expander, 2.5V-6V DC, 64 I/O via Cascading Supports for Arduino /STM32, Suitable for Industrial Control, LED Matrix, Smart Home Low Power, Wide Voltage, Easy to Cascade (Up to 8 Modules) Includes Interrupt Function, Anti-Interference Design, Load Protection FAQ Q1: No I2C Response? Check Address & Pull-Up Resistors (4.7kΩ). Q2: Can’t Drive LED/Relay? Use External Pull-Up (1k–10kΩ), Add Transistor for Relay. Q3: INT Not Working? Set P0–P7 High Before Reading. Q4: Address Conflict? Configure A0/A1/A2 Individually. Q5: Overheat? Limit Current (<25mA/Port), Add TVS for Inductive Loads.
