The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
PLµX standard pin configuration for PCA9555.
Download 24v_8io_interface.tar.gz schematic and PCB.
Created with Eagle PCB Design Software cadsoftusa.
Create your own PCB: eurocircuits
Number of channels | 8 |
Input voltage | 24V |
Galvanic isolation: Number of groups | 4 |
Output voltage | 24V |
Output current | 0.5A |
Number of channels | 8 |
Galvanic isolation: Number of groups | 4 |
A simple ansi c library for the PCA9555 I2C Expander.
Download: Ansi C souce file, Header file.
Comments
georgo (not verified)
Sat, 01/10/2015 - 11:20
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24v interface
dciadmin
Mon, 01/12/2015 - 18:36
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admin
Ross (not verified)
Mon, 03/16/2015 - 09:07
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USB To Buffered Digital I/O
dciadmin
Mon, 03/16/2015 - 09:09
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USB To Buffered Digital I/O
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