Datasheet > CAT9954AHV4I-T2

CAT9954AHV4I-T2

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
CATALYST		/
页数	文件大小	规格书
16页	267K
描述
8-bit I2C and SMBus I/O Port with Interrupt

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CAT9954AHV4I-T2 数据手册

CAT9554, CAT9554A

8-bit I²C and SMBus I/O Port with Interrupt

FEATURES

DESCRIPTION

I 400kHz I²C bus compatible*

I 2.3V to 5.5V operation

The CAT9554 and CAT9554A are CMOS devices that

provide 8-bit parallel input/output port expansion for I²C

and SMBus compatible applications. These I/O

expanders provide a simple solution in applications

where additional I/Os are needed: sensors, power

switches, LEDs, pushbuttons, and fans.

I Low stand-by current

I 5V tolerant I/Os

I 8 I/O pins that default to inputs at power-up

I High drive capability

TheCAT9554/9554Aconsistofaninputportregister,an

output port register, a configuration register, a polarity

inversion register and an I²C/SMBus-compatible serial

interface.

I Individual I/O configuration

I Polarity inversion register

I Active low interrupt output

I Internal power-on reset

Any of the eight I/Os can be configured as an input or

outputbywritingtotheconfigurationregister.Thesystem

master can invert the CAT9554/9554A input data by

writing to the active-high polarity inversion register.

I No glitch on power-up

I Noise filter on SDA/SCL inputs

I Cascadable up to 8 devices

I Industrial temperature range

The CAT9554/9554A features an active low interrupt

outputwhichindicatestothesystemmasterthataninput

state has changed.

I RoHS-compliant 16-lead SOIC and TSSOP, and

The device’s extended addressing capability allows up

to 8 devices to share the same bus. The CAT9554A is

identical to the CAT9554 except the fixed part of the I²C

slaveaddressisdifferent. Thisallowsupto16ofdevices

(eight CAT9554 and eight CAT9554A) to be connected

on the same bus.

16-pad TQFN (4 x 4 mm) packages

APPLICATIONS

I White goods (dishwashers, washing machines)

I Handheld devices (cell phones, PDAs, digital

cameras)

I Data Communications (routers, hubs and

For Ordering Information details, see page 15.

servers)

BLOCK DIAGRAM

I/O0

I/O1

I/O2

8-BIT

SCL

SDA

I/O3

I/O4

I/O5

I/O6

I/O7

I C/SMBUS

INPUT/

OUTPUT

PORTS

INPUT

FILTER

CONTROL

WRITE pulse

READ pulse

POWER-ON

RESET

FILTER

INT

NOTE: ALL I/Os ARE SET TO INPUTS AT RESET

* Catalyst Semiconductor is licensed by Philips Corporation to carry the I C Bus Protocol.

Characteristics subject to change without notice

Doc. No. 25088, Rev. B

12 3 4 5 6 7...16

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