Generic PCF8574T I2C Serial Interface Adapter Module | LCD/OLED Display Control | Address Selectable
₹149.00₹250.00 (price_including_tax) (-40%)
Effortlessly connect I2C-enabled LCD and OLED displays to your microcontroller projects. This adapter dramatically reduces wiring complexity, transforming multi-pin display connections into a simple two-wire I2C interface. Engineered for robust performance, it ensures reliable data transmission in diverse applications.
Seamlessly integrate I2C displays with microcontrollers, simplifying wiring and expanding project possibilities.
Converts complex parallel display connections to a simple, efficient two-wire I2C interface.
Liberates numerous microcontroller general-purpose input/output pins for other critical functionalities and sensors.
Configurable I2C addresses allow multiple modules to operate simultaneously on a single bus.
The Engineering Behind I2C Serial Interface Adapter Module
This I2C Serial Interface Adapter Module, commonly built around the PCF8574T I/O expander, serves as a crucial bridge for connecting standard parallel LCD or OLED displays to microcontrollers using the I2C (Inter-Integrated Circuit) serial communication protocol. It significantly simplifies wiring by converting the 16 or 20 parallel data lines required by traditional displays into just two I2C lines (SDA and SCL), plus power and ground, freeing up valuable GPIO pins on your microcontroller.
Designed for longevity and robust integration, the module features high-quality solder joints and clearly labeled pinouts. Its compact form factor makes it ideal for space-constrained projects, while the onboard potentiometers for contrast adjustment and jumper-selectable backlighting ensure comprehensive control over display characteristics, making it a staple in both educational and professional prototyping environments.
Efficient I/O Expansion via PCF8574T
The core of this adapter is the PCF8574T (or similar I/O expander), which provides 8-bit quasi-bidirectional parallel port expander functionality. This chipset allows a single I2C bus to control up to eight separate I/O pins, effectively acting as an intermediary to drive the parallel data and control lines of an LCD/OLED display. This intelligent design drastically reduces the required microcontroller pins from 7-11 to just 2 for data communication.
Address Selectability for Multi-Device Integration
Featuring solderable address pins (A0, A1, A2), this module offers user-configurable I2C addresses, typically ranging from 0x20 to 0x27 or 0x3F to 0x47 depending on the PCF8574T/AT variant. This crucial capability allows multiple I2C devices, including several of these adapter modules, to coexist on the same I2C bus without address conflicts, streamlining complex system architectures and enhancing modularity.
Optimized for Performance & Integration
- Controller Chip: PCF8574T / PCF8574AT
- Communication Protocol: I2C
- Operating Voltage: 2.5V – 6V DC
- I2C Address Range: 0x20-0x27 or 0x3F-0x47 (Solder Jumper Configurable)
- Backlight Control: Jumper Selectable
- Contrast Adjustment: Onboard Potentiometer
- Pin Count Reduction: Transforms 7-11 parallel pins to 2 I2C pins
- Compatibility: 16×2, 20×4 LCD/OLED Displays
Features & Benefits
- I2C Interface: Simplifies wiring to just two data lines (SDA, SCL), freeing up microcontroller GPIO pins.
- PCF8574T I/O Expander: Provides 8-bit quasi-bidirectional port expansion, efficiently driving parallel display data.
- Adjustable I2C Address: Solder jumpers allow configuration of up to 8 unique addresses on a single bus, enabling multiple device control.
- Onboard Potentiometer: Fine-tunes display contrast for optimal readability in varying lighting conditions.
- Jumper Selectable Backlight: Easily toggle display backlighting on or off to conserve power or adapt to ambient light.
- Wide Voltage Compatibility: Operates reliably from 2.5V to 6V, suitable for 3.3V and 5V systems.
Pro-Grade Advantages
- Drastically reduces wiring complexity for LCD/OLED displays.
- Frees up valuable microcontroller GPIO pins.
- Supports multiple displays on a single I2C bus via address selection.
- Integrated backlight and contrast control for comprehensive display management.
Technical Considerations
- Requires basic understanding of I2C protocol for initial setup.
- May introduce slight delay compared to direct parallel communication for high-speed updates.
What is the primary function of an I2C Serial Interface Adapter Module?
Its primary function is to convert the parallel data interface of standard character LCD/OLED displays into a serial I2C interface, drastically reducing the number of microcontroller pins required for control.
Which IC chip is typically used on this adapter module?
The module commonly utilizes the PCF8574T or PCF8574AT 8-bit I/O expander chip, which manages the parallel communication to the display.
How do I change the I2C address of the module?
The I2C address is typically configured using solder jumpers (A0, A1, A2) on the module, allowing for up to eight unique addresses by bridging or leaving them open.
What operating voltage does this module support?
Most I2C Serial Interface Adapter Modules designed around the PCF8574T support a wide operating voltage range, typically from 2.5V to 6V DC, making them compatible with both 3.3V and 5V microcontrollers.
Can I connect multiple I2C displays using these modules on a single I2C bus?
Yes, by configuring each module to a unique I2C address via its address jumpers, you can connect multiple displays (up to the maximum addresses supported) on the same I2C bus.
| Specification | Value |
|---|---|
| Controller IC | PCF8574T / PCF8574AT |
| Communication Protocol | I2C |
| Operating Voltage | 2.5V – 6V DC |
| I2C Address Range | 0x20 – 0x27 or 0x3F – 0x47 |
| Number of I/O Pins | 8 (Quasi-bidirectional) |
| Backlight Control | Jumper Selectable |
| Contrast Control | Onboard Potentiometer |
| LED Indicator | Power LED |
| Pin Pitch | 2.54mm |
| Mounting Holes | Yes |
| Compatibility | 16×2, 20×4 Character LCD/OLED Displays |
Additional information
| Brand | Generic |
|---|---|
| Technology | I2C |
| Operating Voltage | 2.5V-6V |
| Control Interface | I2C |
| Main Controller | PCF8574T |
| Channels | 8 I/O (via PCF8574T) |
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