SGM708
Low-Cost, Microprocessor
Supervisory Circuit
GENERAL DESCRIPTION
The SGM708 microprocessor supervisory circuit reduces
the complexity and number of components required to
monitor power-supply and monitor microprocessor
activity. It significantly improves system reliability and
accuracy compared to separate ICs or discrete
components.
The SGM708 provides power-supply monitoring circuitry
that generates a reset output during power-up,
power-down and brownout conditions. The reset output
remains operational with V
CC
as low as 1V.
In addition, there is a 1.25V threshold detector for
power-fail warning, low-battery detection, or monitoring
an additional power supply. An active-low manual-reset
input (
MR
) is also included.
The SGM708 is available in Green SOIC-8 package. It
operates over an ambient temperature range of -40℃ to
+85℃.
FEATURES
Precision Supply-Voltage Monitor
4.65V for SGM708-L
4.40V for SGM708-M
4.0V for SGM708-J
3.08V for SGM708-T
2.93V for SGM708-S
2.63V for SGM708-R
Guaranteed
RESET
Valid at V
CC
= 1V
200ms Reset Pulse Width
Debounced TTL/CMOS-Compatible
Manual-Reset Input
Voltage Monitor for Power-Fail or Low-Battery Warning
Dual Reset Outputs (Active-Low and Active-High )
-40℃ to +85℃ Operating Temperature Range
Green SOIC-8 Package
APPLICATIONS
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical μP Power Monitoring
REV. A. 3
SG Micro Corp
www.sg-micro.com
Low-Cost, Microprocessor
SGM708 Supervisory Circuit
2
SG Micro Corp
www.sg-micro.com
PACKAGE/ORDERING INFORMATION
MODEL
RESET
THRESHOLD (V)
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKAGE
OPTION
4.65 SOIC-8 SGM708-LYS8G/TR SGM708-LYS8 Tape and Reel, 2500
4.40 SOIC-8 SGM708-MYS8G/TR SGM708-MYS8 Tape and Reel, 2500
4.0 SOIC-8 SGM708-JYS8G/TR SGM708-JYS8 Tape and Reel, 2500
3.08 SOIC-8 SGM708-TYS8G/TR SGM708-TYS8 Tape and Reel, 2500
2.93 SOIC-8 SGM708-SYS8G/TR SGM708-SYS8 Tape and Reel, 2500
SGM708
2.63 SOIC-8 SGM708-RYS8G/TR SGM708-RYS8 Tape and Reel, 2500
NOTE: Order number is defined as the follow:
ORDER NUMBER
SGM 708- X Y X G / TR
Package Type
Tape and Reel
S8 SOIC-8
Operating Temperature Range
Y -40℃ to +85℃
RESET THRESHOLD
L: 4.65V
M: 4.40V
J: 4.0V
T: 3.08V
S: 2.93V
R: 2.63V
Green product
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage because
very small parametric changes could cause the device not to
meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
ABSOLUTE MAXIMUM RATINGS
(Typical values are at T
A
= +25℃, unless otherwise noted.)
Terminal Voltage (with respect to GND)
V
CC
........................................................................-0.3V to 6.0V
All Other Inputs........................................ -0.3V to (V
CC
+ 0.3V)
Input Current, V
CC
..............................................................20mA
GND................................................................................. 20mA
Output Current, (all outputs)............................................. 20mA
Operating Temperature Range........................... -40℃ to +85℃
Junction Temperature....................................................... 150℃
Storage Temperature........................................ -65℃ to +150℃
Lead Temperature (Soldering, 10sec).............................. 260℃
ESD Susceptibility
HBM..................................................................................4000V
MM......................................................................................300V
NOTE:
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.