CAT1025 Ver la hoja de datos (PDF) - Catalyst Semiconductor => Onsemi

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CAT1025

Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM and Manual Reset

Catalyst Semiconductor => Onsemi 

CAT1024, CAT1025

PIN DESCRIPTION

RESET/R¯¯E¯S¯E¯T¯: RESET OUTPUTs

(RESET CAT1025 Only)

These are open drain pins and R¯¯E¯S¯E¯T¯ can 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

R¯¯E¯S¯E¯T¯ pin must be connected through a pull-up

resistor.

SDA: SERIAL DATA ADDRESS

The bidirectional serial data/address pin is used to

transfer 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.

SCL: SERIAL CLOCK

Serial clock input.

¯M¯R¯: MANUAL RESET INPUT

Manual Reset input is a debounced input that can be

connected to an external source for Manual Reset.

Pulling the MR input low will generate a Reset

condition. Reset outputs are active while ¯M¯R¯ input is

low and for the reset timeout period after ¯M¯R¯ returns

to high. The input has an internal pull up resistor.

WP (CAT1025 Only): WRITE PROTECT INPUT

When WP input is tied to VSS or left unconnected write

operations to the entire array are allowed. When tied

to VCC, the entire array is protected. This input has an

internal pull down resistor.

PIN FUNCTION

Pin

Name

NC

R¯¯E¯S¯E¯T¯

VSS

SDA

SCL

RESET

VCC

WP

¯M¯R¯

Function

No Connect

Active Low Reset Input/Output

Ground

Serial Data/Address

Clock Input

Active High Reset Output

(CAT1025 only)

Power Supply

Write Protect (CAT1025 only)

Manual Reset Input

OPERATING TEMPERATURE RANGE

Industrial -40ºC to 85ºC

Extended -40ºC to 125ºC

CAT10XX FAMILY OVERVIEW

Device

CAT1021

CAT1022

CAT1023

CAT1024

CAT1025

CAT1026

CAT1027

Manual

Reset

Input Pin

Watchdog

Watchdog

Monitor

Pin

SDA

SDA

WDI

Write

Protection

Pin

WDI

Independent

Auxiliary

Voltage Sense

RESET:

Active High

and LOW

EEPROM

2k

2k

2k

2k

2k

2k

2k

For supervisory circuits with embedded 16k EEPROM, please refer to the CAT1161, CAT1162 and CAT1163

data sheets.

© Catalyst Semiconductor, Inc.

3

Characteristics subject to change without notice

Doc. No. MD-3008 Rev. O

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