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12

ALO

GENFR

TM

LEAD FREE

Features

■

low stand-by current

■

0 to 400 kHz clock frequency

■

2.3 V to 5.5 V operation

■

5 V tolerant I/Os

CAT9534 / CAT9535

■

active low interrupt output

■

internal power-on reset

■

noise filter on SCL/SDA inputs

Package Information

■

16-pin SOIC & 16-pin TSSOP (CAT9534),24-pin SOIC (CAT9535)

■

16-pad TQFN (4 x 4 mm) (CAT9534),24-pin TQFN (4x4mm) (CAT9535)

■

pin compatible with PCA9534

8-BIT

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

I/O6

I/O7

VCC

WRITE pulse

READ pulse

LP

FILTER

POWER-ON

RESET

INPUT

FILTER

I2C/SMBUS

CONTROL

A0

A1

A2

SCL

SDA

VCC

VSS

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

INPUT/

OUTPUT

PORTS

Applications

■

RAID systems

■

servers

■

test equipment

■

fan control

I/O 0.0

I/O 0.1

I/O 0.2

I/O 0.3

I/O 0.4

I/O 0.5

VDD

VDD

SCL

SDA

INT

RESET

GND

SCL

SDA

A2

A1

A0

VSS

VDD

SUBSYSTEM 3

SUBSYSTEM 2

SUBSYSTEM 1

INT

V

ALARM

DD

Controlled Switch

ENABLE

2 k

A

B

INT

I/O 0.6

I/O 0.7

I/O 1.0

I/O 1.1

I/O 1.2

I/O 1.3

I/O 1.4

I/O 1.5

I/O 1.6

I/O 1.7

NUMERIC

KEYPAD

CAT9535

Timer

■

2.3V to 5.5V operation

■

-40°C to +85°C operation

■

■

5V tolerant I/Os

■

drive LEDs by sinking 25mA current

■

active low interrupt output

■

cascadable up to 8 devices-16

devices (CAT9555)

■

high drive capability

■

individual I/O configuration

■

internal power-on reset

■

noise filter on SDA/SCL inputs

■

16-pin SOIC (CAT9554),24-pin SOIC (CAT9555)

■

16-pin TSSOP (CAT9554),24-pin TSSOP (CAT9555)

■

16-pad TQFN (4 x 4 mm) (CAT9554),24-pin TQFN

(4x4mm) (CAT9555)

■

pin compatible with PCA9554/9554A and PCA9555

Features

Package Information