PCF8574T SMD 8 bit I/O expansion for I2C – SOIC16
PCF8574T SMD 8 bit I/O expansion for I2C – SOIC16
I2C 8-Bit Parallel Port Expander IC – Low-Power GPIO Expansion Controller
This I2C-based 8-bit Parallel Port Expander IC is a compact and efficient GPIO expansion solution designed for embedded systems, automation electronics, IoT devices, LED control, and sensor interfacing applications. Featuring a standard 100kHz I2C interface, programmable slave addressing, interrupt output support, and low standby current, the IC enables reliable remote digital I/O expansion while maintaining low power consumption and strong ESD protection.
Why it’s a System Essential:
• I2C GPIO Expansion: Adds 8 programmable digital I/O lines using a simple two-wire I2C interface.
• Low-Power Operation: Extremely low standby current improves energy efficiency in portable systems.
• Direct LED Drive Support: Latched outputs can directly control LEDs without extra drivers.
• Interrupt-Based Monitoring: Active LOW interrupt output improves responsive embedded operation.
• Flexible Multi-Device Support: Eight programmable I2C addresses allow multiple devices on the same bus.
• Industrial Temperature Range: Reliable operation from -40°C to +85°C.
• Strong ESD Protection: Enhanced protection improves reliability in industrial and embedded environments.
Technical Specifications:
• Device Type: I2C-Bus to Parallel Port Expander
• I2C Interface Speed: 100kHz (Standard-Mode I2C)
• Operating Supply Voltage: 2.5V to 6V
I/O Features:
• 8-Bit Remote I/O Pins
• I/O Pins Default to Inputs at Power-Up
• Non-Overvoltage Tolerant I/O Held to VDD
• Internal 100µA Current Source
• Latched Outputs for Direct LED Drive
• Total Package Sink Capability: 80mA
Interrupt & Addressing Features:
• Active LOW Open-Drain Interrupt Output
• Eight Programmable Slave Addresses
• Address Configuration via Three Address Pins
Power & Environmental Features:
• Low Standby Current: 2.5µA Typical
• Operating Temperature Range: -40°C to +85°C
ESD Protection:
• >2000V Human Body Model (HBM)
• JESD22-A114 Compliant
• >1000V Charged Device Model (CDM)
• JESD22-C101 Compliant
Features:
• Low-power GPIO expansion
• Standard I2C communication support
• Direct LED driving capability
• Interrupt-based event handling
• Industrial-grade operating range
• Enhanced ESD protection reliability
Applications:
• GPIO expansion for microcontrollers
• Embedded systems development
• LED control systems
• Sensor interfacing applications
• Industrial automation electronics
• IoT and smart home devices
• Portable low-power electronics
• Educational electronics projects
• DIY embedded development
Best For:
Ideal for students, hobbyists, makers, engineers, and embedded developers working on automation systems, IoT devices, microcontroller projects, LED control systems, sensor-based applications, and embedded electronics requiring reliable low-power digital I/O expansion over an I2C interface.
Specifications
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