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PCA9555DBR
datasheet
by Texas Instruments
Description
PCA9555 - Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration
...
Registers 24-SSOP -40 to 85
more
Datasheet Type
Original
RoHS
Yes
Pb Free
Yes
Lifecycle
Active
ECCN
EAR99
HTS Code
8542.39.00.01
Schedule B
8542.39.00.00
Price & Stock
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PCA9555DBR Frequently Asked Questions (FAQs)
What is the maximum frequency of the I2C bus that the PCA9555DBR can support?
The PCA9555DBR can support I2C bus frequencies up to 400 kHz.
How do I configure the PCA9555DBR for 8-bit or 16-bit port expansion?
The PCA9555DBR can be configured for 8-bit or 16-bit port expansion by setting the A0 and A1 address pins. For 8-bit expansion, tie A0 and A1 to GND. For 16-bit expansion, tie A0 to VCC and A1 to GND.
What is the maximum current that the PCA9555DBR can sink or source per output pin?
The PCA9555DBR can sink or source up to 25 mA per output pin.
How do I reset the PCA9555DBR?
The PCA9555DBR can be reset by pulling the RESET pin low for at least 1 ms.
What is the purpose of the INT pin on the PCA9555DBR?
The INT pin is an active-low interrupt output that is asserted when a change is detected on any of the input pins.
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PCA9555DBR datasheet
by Texas Instruments
