PCA9554(2006) データシートの表示（PDF） - NXP Semiconductors.

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PCA9554
(Rev.:2006)

8-bit I2C-bus and SMBus I/O port with interrupt

NXP Semiconductors. 

NXP Semiconductors

4. Block diagram

PCA9554/PCA9554A

8-bit I2C-bus and SMBus I/O port with interrupt

PCA9554/PCA9554A

A0

A1

A2

SCL

SDA

INPUT

FILTER

VDD

VSS

POWER-ON

RESET

I2C-BUS/SMBus

CONTROL

8-bit

write pulse

read pulse

INPUT/

OUTPUT

PORTS

IO0

IO1

IO2

IO3

IO4

IO5

IO6

IO7

VDD

LP

FILTER

INT

002aac492

All I/Os are set to inputs at reset.

Fig 1. Block diagram of PCA9554/PCA9554A

PCA9554_9554A_7

Product data sheet

Rev. 07 — 13 November 2006

© NXP B.V. 2006. All rights reserved.

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