SUMMIT
MICROELECTRONICS, Inc.
Highly Programmble Voltage Supervisory Circuit
SMS24
FEATURES
l
User Programmable Device Configuration
l
Guaranteed Reset Valid to VCC = 1V
l
Immune to Short Negative VCC Transients
l
Six Unique Pin Configurations
l
User Programmable Feature Options:
w
Reset Threshold Voltages
w
Reset Pulse Widths
w
Programmable Watchdog Timeouts
w
Programmable Over- or Under-Voltage Sens-
ing
l
High Reliability
w
Endurance: 100,000 erase/write cycles
w
Data retention: 100 years
INTRODUCTION
The SMS24 is a configurable and in-system program-
mable second generation 8 pin supervisory circuit. This
single device is adaptable to provide the optimum func-
tionality for a given system or sub-system. User program-
mable functions available — reset pulse width, watchdog
delays, and voltage monitor thresholds — eliminate exter-
nal components and allow standardization to enhance
system reliability. Additionally, 4K bits of general purpose
EEPROM is available on all configurations. The SMS24
is available in six pin configurations, and is compatible with
all Summit programmable devices and other I2C compo-
nents.
Programming of configuration, control and calibration
values by the user can be simplified with the interface
adapter and Windows GUI software obtainable from Sum-
mit Microelectronics.
DEVICE TYPES
Function
Device
Code
001
010
011
100
101
110
Reset#
✔
✔
✔
✔
✔
✔
✔
✔
Reset
✔
Software
Watchdog
WDI
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
WDI Pin
Write
Protect
Pin
2nd
Voltage
Monitor
Manual
Reset
Input
NV
Memory
✔
✔
✔
✔
✔
✔
2048 DTTable 2.1
NC
RESET#
NC
GND
Device
Code
001
V
CC
RESET
SCL
SDA
NC
RESET#
NC
GND
Device
Code
010
V
CC
WP
SCL
SDA
WDI
RESET#
NC
GND
Device
Code
011
V
CC
RESET
SCL
SDA
RESET#2
RESET#1
V
SENSE
GND
Device
Code
100
V
CC
MR#
SCL
SDA
V
LOW
#
RESET#
V
SENSE
GND
Device
Code
101
V
CC
RESET
SCL
SDA
V
LOW
#
RESET#
V
SENSE
GND
Device
Code
110
V
CC
WDI
SCL
SDA
2046 DT 1.0
©SUMMIT MICROELECTRONICS, Inc., 2001 • 300 Orchard City Dr., Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • FAX 408-378-6586 • www.summitmicro.com
Characteristics subject to change without notice
2048 2.4. 3/1/01
1
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
