PCF8574 I2C 8bit I/O Expander
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Product detailed description
If you are low on I/O pins, it's not a problem to add some. All you need is this module. This module expands the number of input/output pins by 8. And because it communicates over the I2Cbus, it takes only 2 I/O pins
The device is equipped with an 8-bit quasi bidirectional I/O port (P0-P7), including latch outputs with high current supply for direct LED drive. Each quasi bidirectional I/O can be used as input or output without using a data direction signal.
Thanks to the adjustable three-bit addressing it should not be a problem to connect up to 8 such circuits together
The module contains a DIP switch that can be used to change the I2Caddress. Details in the datasheet.
Included in delivery:
- 1pc PCF8574 I2C 8bit I/O Expander
Remark:
- This product is not a standalone functional unit and may require professional installation.
- Product images are for illustration purposes only and may sometimes differ from the actual appearance of the item. However, this does not change its basic properties.
Additional parameters
Category: | I/O Expander and multiplexer |
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Warranty: | 2 years |
Weight: | 0.004 kg |
5,0
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JS
Jiří Sloupenský
Funguje jak jsem očekával.
5
JP
Jiří Petrásek
Super expander.
Jen jsem úplně nepochopil způsob adresace. Zkoušel jsem 3 kusy a jeden se adresuje tak jak je uvedené v návodu a další dva mají podle I2C scanu jinou adresu, než bych předpokládal. Ale možná dělám něco špatně. :-)
P
Pavel
Protože IC expanderu neni od Texas Instruments jak napovída odkaz u datasheetu, ale od NXP (na IC je logo Philips). Ten ma 2 varianty adres. verzi PCF8574: 0x20-0x27 a verzi PCF8574A: 0x38-0x3F
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