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PCF8574P Datasheet(PDF) 18 Page - NXP Semiconductors |
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PCF8574P Datasheet(HTML) 18 Page - NXP Semiconductors |
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18 / 33 page  PCF8574_PCF8574A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 5 — 27 May 2013 18 of 33 NXP Semiconductors PCF8574; PCF8574A Remote 8-bit I/O expander for I2C-bus with interrupt Rise and fall times refer to VIL and VIH. Fig 17. I2C-bus timing diagram 002aab175 protocol START condition (S) bit 7 MSB (A7) bit 6 (A6) bit 0 (R/W) acknowledge (A) STOP condition (P) SCL SDA tHD;STA tSU;DAT tHD;DAT tf tBUF tSU;STA tLOW tHIGH tVD;ACK tSU;STO 1 / fSCL tr tVD;DAT 0.3 × VDD 0.7 × VDD 0.3 × VDD 0.7 × VDD |
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