SMS44 Datasheet, PDF (1/16 Pages) Summit Microelectronics, Inc. – Highly Programmble Voltage Supervisory Circuit

SUMMIT
MICROELECTRONICS, Inc.
SMS44
Highly Programmble Voltage Supervisory Circuit
NOTE: THIS PRODUCT HAS REACHED END OF LIFE
FEATURES
! Operational from any of four Voltage Monitoring
Inputs
! Programmability allows monitoring any voltage
between 0.9V and 6.0V with NO external
components
! Programmable Watchdog Timer
! Programmable Longdog™ Timer
! Programmable Reset Pulse Width
! Programmable Power-up sequencing
! Programmable Nonvolatile Combinatorial Logic
for generation of reset and interrupt outputs
! Fault Status Register
INTRODUCTION
The SMS44 is a highly programmable voltage supervisory
circuit designed specifically for advanced systems need-
ing to monitor multiple voltages. The SMS44 can monitor
four separate voltages without the need of any external
voltage divider circuitry
The SMS44 watchdog timer has a user programmable
timeout period and it can be placed in an idle mode for
system initialization or system debug. All of the functions
are user accessible through an industry standard 2-wire
serial interface.
FUNCTIONAL BLOCK DIAGRAM
CONFIGURATION
REGISTER
11 RESET#
MR# 1
V0 16
V1 2
V2 3
V3 14
NV DAC ₊
REF –
NV DAC ₊
REF –
NV DAC ₊
REF –
NV DAC ₊
REF –
8
GND
RESET
IRQ
RESET
IRQ
RESET
IRQ
RESET
IRQ
CONFIGURATION
REGISTER
PROGRAMMABLE
RESET PULSE
GENERATOR
PROGRAMMABLE
LONGDOG
TIMER
PROGRAMMABLE
WATCHDOG
TIMER
PROGRAMMABLE
POWER
SEQUENCING
4 PUP#1
5 PUP#2
13 PUP#3
SERIAL
BUS
CONTROL
LOGIC
9 SDA
10 SCL
7 A2
6 A1
4K-BIT NV
MEMORY
12 IRQ#
15 WLDI
2047 BD 1.0
©SUMMIT MICROELECTRONICS, Inc., 2000 • 300 Orchard City Dr., Suite 131 • Campbell, CA 95008 • Phone [phone] • FAX [phone] • www.summitmicro.com
2047 2.3 10/23/00 EOL 12/16/05
Characteristics subject to change without notice
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