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Product Summary
The PCA9557PWR is a silicon CMOS circuit which provides parallelinput/output expansion for SMBus and I2C applications. The PCA9557PWR consists of an 8-bit input port register, 8-bit output portregister, and an I2C/SMBus interface. It has low currentconsumption and a high impedance open drain output pin, I/O.
Parametrics
PCA9557PWR absolute maximum ratings: (1)DC supply voltage, VDD: -0.5 to 6.0V; (2)DC input voltage, Vi: VSS-0.5 to 5.5V; (3)DC input current, Ii: -25MA; (4)Maximum allowed input current through protection; (5)diode, IIHL(max): -400μA; (6)DC voltage on an I/O as an input other than I/O0, VI/O: VSS-0.5 to 5.5V; (7)DC voltage on I/O0 as an input, II/OI/O0: VSS-0.5V; (8)DC input current, II/OI/O0: -20mA ; (9)DC output current on an I/O, IDD: 85mA ; (10)DC supply current, ISS: 100mA ; (11)Total power dissipation, Ptot: 200mW ; (12)Storage temperature range, Tstg: -65 to +150℃; (13)Operating ambient temperature, Tamb: -40 to +85℃.
Features
PCA9557PWR features: (1)Lower voltage, higher performance migration path for the PCA9556; (2)8 general purpose input/output expander/collector; (3)Input/output configuration register; (4)Active HIGH polarity inversion register; (5)I2C and SMBus interface logic; (6)Internal power-on reset; (7)Noise filter on SCL/SDA inputs; (8)Active LOW reset input; (9)3 address pins allowing up to 8 devices on the I2C/SMBus.
Diagrams
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 PCA9557PWR |
Texas Instruments |
I/O Expanders, Repeaters & Hubs Remote 8B I2C & SMBus I/O Expander |
Data Sheet |
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PCA9557PWRG4 |
Texas Instruments |
I/O Expanders, Repeaters & Hubs Rem 8B I2C & SMBus Low-Pwr I/O Expander |
Data Sheet |
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