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The RoHS icon on this product indicates that the PCBs, components, solder, and chemicals are all lead-free and RoHS compliant. Additionally, this product is produced using a lead-free process. Unfortunately, we are currently unable to provide documentation confirming that this product is RoHS compliant.
Resources:
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Package Includes:
This package does not include cables.
Notes:
- This board uses 4-pin connectors for I2C bus.
- This board has an INT (interrupt signal).
Features:
- Operating voltage: 3.0 – 5.5V
- I2C bus frequency: up to 400kHz
- I2C controller: PCF8575
- Input voltage: 3 – 30V
- Higher input voltages supported with external resistors
- 16 optocoupler-isolated inputs
- Input isolation voltage: 3.75kV
- Onboard pull-up resistors for I2C bus (jumper selectable)
- Configurable I2C address: up to 8 addresses via 3 jumpers
- Connector footprint for INT (interrupt) signal
- Polarity protection circuitry
- PCB dimensions: 160.50 x 28.00 mm
This is an I2C bus input expander board based on the PCF8575. It is designed to expand the input ports of microcontrollers and can interface with most platforms such as Arduino, ESP32, and Raspberry Pi.
The board supports 16 optocoupler-isolated inputs. Each input accepts 3–30 V, and higher voltages can be used by adding external resistors. The board operates with a 3.0–5.5 V power supply and supports I2C bus frequencies up to 400 kHz.
It provides a PCB footprint for a connector to the INT (interrupt) signal and includes built-in pull-up resistors for the I2C bus, which can be enabled via jumpers. The board address can be configured for up to eight different addresses using three jumpers.
To prevent accidental damage, the board includes polarity-protection circuitry. The PCB dimensions are com-pact, making it suitable for space-constrained applications
