PCA9554A(2006) 查看數據表（PDF） - NXP Semiconductors.

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PCA9554A
(Rev.:2006)

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

NXP Semiconductors. 

NXP Semiconductors

PCA9554/PCA9554A

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

7. Application design-in information

VDD (5 V)

VDD

MASTER

CONTROLLER

SCL

SDA

INT

VSS

10 kΩ

10 kΩ

10 kΩ

10 kΩ

2 kΩ

VDD

PCA9554

SCL

IO0

SDA

IO1

IO2

INT

IO3

IO4

IO5

IO6

IO7

A2

A1

A0

VSS

Device address configured as 0100 100X for this example.

IO0, IO1, IO2 configured as outputs.

IO3, IO4, IO5 configured as inputs.

IO6 and IO7 are not used and must be configured as outputs.

Fig 16. Typical application

SUBSYSTEM 1

(e.g., temp. sensor)

INT

RESET

SUBSYSTEM 2

(e.g., counter)

A

enable

controlled switch

(e.g., CBT device)

B

ALARM

SUBSYSTEM 3

(e.g., alarm system)

VDD

002aac496

8. Limiting values

Table 8. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter

Conditions

Min

Max Unit

VDD

II

VI/O

IO(IOn)

IDD

supply voltage

input current

voltage on an input/output pin

output current on pin IOn

supply current

−0.5

+6.0 V

-

±20

mA

VSS − 0.5 5.5

V

-

±50

mA

-

85

mA

ISS

Ptot

Tstg

Tamb

ground supply current

total power dissipation

storage temperature

ambient temperature

operating

-

100

mA

-

200

mW

−65

+150 °C

−40

+85

°C

PCA9554_9554A_7

Product data sheet

Rev. 07 — 13 November 2006

© NXP B.V. 2006. All rights reserved.

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