Cables are not included.
This is I2C bus output board for remote 8-output expander via I2C bus based on PCF8574A. It is called I2C Output Board. Making it ideal as open collector expander for I2C bus. They are
designed to compatible with most microcontrollers.
The PCF8574A is the I2C bus controllers which talk to microcontroller and then
take commands to output ports. The PCF8574A supports 100kHz bus frequency. And it can be connected to I2C port of most microcontrollers.
The board uses ULN2803A for output driver which has 8 open collectors. The maximum current of each output is 500mA(using single output)and 50V for voltage.
The board is addressed by 3 jumpers to make 8 different addresses. So that 8 boards can be connected together on the same bus.
Moreover 16 boards can be connected together on the same bus by using 8 boards of the PCF8574 and 8 boards of the PCF8574A. Because the PCF8574 does not have the same address as the PCF8574A.
The board has inverse polarity protection circuit for power supply input voltage to prevent damage from a mistake of connection.
The board has LED to show status of the power supply voltage.
The difference between the I2C-OC805SA and the I2C-OC805S is
the I2C-OC805SA uses PCF8574A ,but the I2C-OC805S uses PCF8574. The PCF8574 and PCF8574A have different addresses.
Power dissipation of ULN2803A chip is importance thing for each application. You must calculate the power dissipation for your application.
To prevent damage to the board. Don't plug and/or unplug I2C cables on the board while a power supply still turns on. Turn off a power supply before plug and/or unplug I2C cables on the board.
Features:
- PCF8574A I2C bus I/O expander
- 8 Outputs Open Collectors
- Operating voltage 2.5V to 5.5V
- Inverse polarity protection circuits
- 100kHz I2C Bus frequency
- Address by 3 jumpers for use of up to 8 addresses
- Up to 16 boards on one bus
- Compatible with most microcontrollers
- Max. Load voltage 50V
- 500mA Rated Collector Current(using single output)
- PCB size 67x27mm
Package Includes:
Notes:
- This board uses 4-pin connectors for I2C bus.
Downloads:
Comments:
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The RoHS icon with this product means the PCBs, components, solder, chemicals are all lead-free and RoHS compliant. And this product is produced in lead free process. Unfortunately, now, we cannot provide documentation for this product is RoHS compliant.
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