9538 查看數據表（PDF） - NXP Semiconductors.

零件编号

产品描述 (功能)

生产厂家

9538

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

NXP Semiconductors. 

NXP Semiconductors

PCA9538

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

7. Application design-in information

VDD

(5 V)

VDD

MASTER

CONTROLLER

SCL

SDA

INT

RESET

VSS

10 kΩ

10 kΩ

10 kΩ

10 kΩ

VDD

2 kΩ

PCA9538

SCL

IO0

SDA

IO1

INT

IO2

RESET

IO3

IO4

IO5

A1

IO6

A0

IO7

VSS

100 kΩ

(× 3)

SUB-SYSTEM 1

(e.g., temp sensor)

INT

SUB-SYSTEM 2

(e.g., counter)

RESET

A

enable

controlled

switch

(e.g., CBT device)

B

SUB-SYSTEM 3

(e.g., alarm system)

ALARM

Device address is 1110 000x for this example.

IO0, IO2, IO3 configured as outputs.

IO1, IO4, IO5 configured as inputs.

IO6, IO7 are not used and need 100 kΩ pull-up resistors to protect them from floating.

Fig 11. Typical application

VDD

002aae712

PCA9538_5

Product data sheet

Rev. 05 — 28 May 2009

© NXP B.V. 2009. All rights reserved.

11 of 28

Share Link: