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SUMMIT

MICROELECTRONICS, Inc.

Preliminary

SMS2916

3 and 5 Volt Systems

Precision Voltage Supervisory Circuit

With Watchdog Timer and 16K I

C Memory

FEATURES

• Precision Voltage Monitor

– Automatic V

Supply Monitor

- Complementary reset outputs for complex

microcontroller systems

- Integrated memory write lockout function

- No external components required

• Watchdog Timer

– Nominal 1.6 second Timeout

• Memory Internally Organized 2K X 8

– Two Wire Serial Interface (I

C™)

• High Reliability

– Endurance: 1,000,000 erase/write cycles

– Data retention: 100 years

• 8-Pin PDIP or SOIC Packages

OVERVIEW

The SMS2916 is a power supervisory circuit that monitors

(either in a 5V system or 3V system) and will generate

complementary reset outputs. The reset pins also act as

I/Os and may be used for signal conditioning. The

SMS2916 also has an on-board watchdog timer that has

a nominal time out period of 1.6 seconds.

The SMS2916 integrates a 16K-bit nonvolatile serial

memory. It features the industry standard I

C serial

interface allowing quick implementation in an end-users’

system.

BLOCK DIAGRAM

CC 8

RESET

5KHz

Oscillator

RESET

PULSE

GENERATOR

GND 4

1.26V

TRIP

RESET

CONTROL

RESET

WATCHDOG

TIMER

SCL

SDA

EEPROM

MEMORY

ARRAY

WDI

2028 ILL2.1

SUMMIT MICROELECTRONICS, Inc.

•

300 Orchard City Drive, Suite 131

•

Campbell, CA 95008

•

Telephone 408-378-6461

•

Fax 408-378-6586

•

www.summitmicro.com

2028-02 4/24/98

Characteristics subject to change without notice

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