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SMS2902 Datasheet(PDF) 1 Page - Summit Microelectronics, Inc.

Part No. SMS2902
Description  Voltage Supervisory Circuit With Watchdog Timer
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Maker  SUMMIT [Summit Microelectronics, Inc.]
Homepage  http://www.summitmicro.com
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 1 page
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SUMMIT MICROELECTRONICS, Inc.
300 Orchard City Drive, Suite 131
Campbell, CA 95008
Telephone 408-378-6461
Fax 408-378-6586
www.summitmicro.com
1
© SUMMIT MICROELECTRONICS, Inc. 2000
2028 5.1 8/2/00
Characteristics subject to change without notice
SUMMIT
MICROELECTRONICS, Inc.
FEATURES
Precision Voltage Monitor
–VCC Supply Monitor
- Complementary reset outputs for complex
microcontroller systems
- Integrated memory write lockout function
- No external components required
•Watchdog Timer
– 1600 ms, internal
Two Wire Serial Interface (I2C™)
Extended Programmable Functions
available on SMS24
High Reliability
– Endurance: 100,000 erase/write cycles
– Data retention: 100 years
8-Pin SOIC Packages
Voltage Supervisory Circuit With Watchdog Timer
SMS2902/SMS2904/SMS2916
OVERVIEW
The SMS29xx is a power supervisory circuit that monitors
VCC and will generate complementary reset outputs. The
reset pins also act as I/Os and may be used for signal
conditioning. The SMS29xx also has an on-board watch-
dog timer.
The SMS29xx integrates a nonvolatile serial memory. It
features
the
industry
standard
I2C
serial
interface allowing quick implementation in an end-users’
system.
BLOCK DIAGRAM
+
GND
VCC
8
4
RESET#
2
VTRIP
RESET
CONTROL
RESET
7
1.26V
SCL
6
SDA
5
WATCHDOG
TIMER
WDI#
1
2028 T BD 2.0
WRITE
CONTROL
NONVOLATILE
MEMORY
ARRAY
PROGRAMMABLE
RESET PULSE
GENERATOR




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