CAT1320 datasheet(2/18 Pages) ONSEMI

2 / 18 page

CAT1320, CAT1321

Doc. No. MD-3014, Rev. D

Characteristics subject to change without notice.

PIN DESCRIPTION

RESET/

RESET

RESET:

RESET OUTPUTS

These are open-drain pins and

RESET can also be used

as a manual reset trigger input. By forcing a reset condition

on the pin the device will initiate and maintain a reset

condition. The RESET pin must be connected through a

pull-down resistor and the

RESET pin must be connected

through a pull-up resistor.

SDA:

SERIAL DATA ADDRESS

The bidirectional serial data/address pin is used to trans-

fer all data into and out of the device. The SDA pin is an

open drain output and can be wire-ORed with other open

drain or open collector outputs.

BLOCK DIAGRAM — CAT1320, CAT1321

PIN FUNCTIONS

Pin Name

Function

RESET

Active Low Reset Input/Output (CAT1320)

VSS

Ground

SDA

Serial Data/Address

SCL

Clock Input

RESET

Active High Reset Output (CAT1321)

VCC

Power Supply

OPERATING TEMPERATURE RANGE

Industrial

-40˚C to 85˚C

Part Dash

Minimum

Maximum

Number

Threshold

-45

4.50

4.75

-42

4.25

4.50

-30

3.00

3.15

-28

2.85

3.00

-25

2.55

2.70

Threshold Voltage Options

SCL:

SERIAL CLOCK

Serial clock input.

A0, A1, A2:

DEVICE ADDRESS INPUTS

When hardwired, up to eight CAT1320/21 devices may

be addressed on a single bus system (refer to Device

Addressing). When the pins are left unconnected, the

default values are zeros.

32kbit

DOUT

ACK

SENSE AMPS

SHIFT REGISTERS

CONTROL

LOGIC

WORD ADDRESS

BUFFERS

START/STOP

LOGIC

EEPROM

VCC

EXTERNAL LOAD

COLUMN

DECODERS

XDEC

DATA IN STORAGE

HIGH VOLTAGE/

TIMING CONTROL

VSS

SDA

RESET Controller

Precision

Vcc Monitor

STATE COUNTERS

SLAVE

ADDRESS

COMPARATORS

SCL

RESET (CAT1320)

RESET (CAT1321)

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