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PCF8574T/3 Folha de dados(PDF) 18 Page - NXP Semiconductors

Nome de Peças PCF8574T/3
Descrição Electrónicos  Remote 8-bit I/O expander for I2C-bus with interrupt
PDF  33 Pages
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Fabricante Electrônico  NXP [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8574T/3 Folha de dados(HTML) 18 Page - NXP Semiconductors

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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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