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PCA9557PW Datasheet(PDF) 4 Page - NXP Semiconductors |
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PCA9557PW Datasheet(HTML) 4 Page - NXP Semiconductors |
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4 / 16 page  Philips Semiconductors Product data PCA9557 8-bit I2C and SMBus I/0 port with reset 2001 Dec 12 4 SIMPLIFIED SCHEMATIC OF I/O0 WRITE PULSE DATA FROM SHIFT REGISTER I/O0 VSS WRITE CONFIGURATION PULSE D CK FF Q D CK Q FF D CK Q FF D CK Q FF INPUT PORT REGISTER POLARITY INVERSION REGISTER OUTPUT PORT REGISTER DATA FROM SHIFT REGISTER DATA FROM SHIFT REGISTER WRITE POLARITY PULSE CONFIGURATION REGISTER OUTPUT PORT REGISTER DATA INPUT PORT REGISTER DATA POLARITY REGISTER DATA SW00795 READ PULSE ESD PROTECTION DIODE Q Q Q Q NOTE: On power–up or reset, all registers return to default values. Figure 4. Simplified schematic of I/O0 |
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