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PCA9539BS

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

8. Application design-in information

VDD

(5 V)

VDD

MASTER

CONTROLLER

SCL

SDA

INT

RESET

VSS

10 kΩ

10 kΩ

10 kΩ

10 kΩ

VDD

PCA9539

SCL

SDA

INT

RESET

IO0_0

IO0_1

IO0_2

IO0_3

IO0_4

IO0_5

IO0_6

IO0_7

IO1_0

IO1_1

IO1_2

IO1_3

IO1_4

IO1_5

A1

IO1_6

A0

IO1_7

VSS

2 kΩ

100 kΩ

(×3)

SUB-SYSTEM 1

(e.g., temp sensor)

INT

10 DIGIT

NUMERIC

KEYPAD

SUB-SYSTEM 2

(e.g., counter)

RESET

A

enable

controlled

switch

(e.g., CBT device)

B

SUB-SYSTEM 3

(e.g., alarm system)

ALARM

VDD

Device address configured as 1110 100X for this example.

IO0_0, IO0_2, IO0_3 configured as outputs.

IO0_1, IO0_4, IO0_5 configured as inputs.

IO0_6, IO0_7 and (IO1_0 to IO1_7) configured as inputs.

Fig 16. Typical application

002aad730

PCA9539_PCA9539R_5

Product data sheet

Rev. 05 — 28 July 2008

© NXP B.V. 2008. All rights reserved.

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