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PCA8574ATS Datasheet(PDF) 16 Page - NXP Semiconductors |
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PCA8574ATS Datasheet(HTML) 16 Page - NXP Semiconductors |
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16 / 27 page  PCA8574_PCA8574A_2 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 02 — 14 May 2007 16 of 27 NXP Semiconductors PCA8574/74A 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 SCL SDA tHD;STA tSU;DAT tHD;DAT tf tBUF tSU;STA tLOW tHIGH tVD;ACK 002aab175 tSU;STO protocol START condition (S) bit 7 MSB (A7) bit 6 (A6) bit 0 (R/W) acknowledge (A) STOP condition (P) 1/fSCL tr tVD;DAT |
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