PCA9539R 查看數據表（PDF） - NXP Semiconductors.

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PCA9539R

16-bit I2C-bus and SMBus low power I/O port with interrupt and reset

NXP Semiconductors. 

NXP Semiconductors

PCA9539; PCA9539R

16-bit I2C-bus and SMBus low power I/O port with interrupt and reset

70 %

SCL

2

1

0

A

P

30 %

SDA

tsu(D) th(Q)

input

INT

tv(INT_N)

Fig 22. Expanded view of read input port register

50 %

trst(INT_N)

002aad734

70 %

SCL

2

1

0

A

P

SDA

tv(Q)

output

Fig 23. Expanded view of write to output port register

50 %

002aad735

protocol

START

condition

(S)

bit 7

MSB

(A7)

bit 6

(A6)

SCL

SDA

tSU;STA

tBUF

tLOW tHIGH

1 / fSCL

tr

tf

bit 1

(D1)

bit 0

(D0)

acknowledge

(A)

STOP

condition

(P)

tHD;STA

tSU;DAT tHD;DAT

Rise and fall times refer to VIL and VIH.

Fig 24. I2C-bus timing diagram

tVD;DAT

tVD;ACK

tSU;STO

002aab285

PCA9539_PCA9539R_5

Product data sheet

Rev. 05 — 28 July 2008

© NXP B.V. 2008. All rights reserved.

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