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PCF8574APWRG4 Datasheet(PDF) 8 Page - Texas Instruments |
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PCF8574APWRG4 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 21 page  www.ti.com A A A A S 0 1 1 1 A1 A2 A0 1 Data 1 1 P Data 3 Start Condition Acknowledge From Slave Acknowledge From Slave Data From Port Data From Port Slave Address R/W 8 7 6 5 4 3 2 1 tir tir tsps tiv Data 1 Data 2 Data 3 INT Data Into Port B B A A Pn INT R/W A tir 0.7 × VCC 0.3 × VCC 0.7 × VCC 0.3 × VCC 0.7 × VCC 0.3 × VCC 0.7 × VCC 0.3 × VCC SCL View B−B View A−A tiv INT W A 0.7 × VCC 0.3 × VCC SCL D tpv Slave Acknowledge Unstable Data Last Stable Bit SDA Pn PCF8574A REMOTE 8-BIT I/O EXPANDER FOR I2C BUS SCPS069D – JULY 2001 – REVISED OCTOBER 2005 PARAMETER MEASUREMENT INFORMATION (continued) Figure 2. Interrupt Voltage Waveforms Figure 3. I2C Write Voltage Waveforms 8 |
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