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PCA9557 series datasheets. Manufacturer: Texas Instruments.

PCA9557Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DBRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DBRRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DGVRRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DRRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557DTRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557PWRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557PWRRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557PWTRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
PCA9557RGYRRemote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration RegistersDatasheet*)
There are other manufacturers for this components. For more information please check
PCA9557 (Philips Semiconductors)
Click here to download PCA9557 Datasheet
Click here to download Datasheet
*)

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