SGM706-SYSB_sgm706参考电路

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SGM706

Low-Cost, Microprocessor

Supervisory Circuit

GENERAL DESCRIPTION

The SGM706 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 SGM706 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

as low as 1V. Independent

watchdog monitoring circuitry is also provided. This is

activated if the watchdog input has not been toggled

within 1.6 seconds.

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 (

) is also included.

The SGM706 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 SGM706-L

4.40V for SGM706-M

4.0V for SGM706-J

3.08V for SGM706-T

2.93V for SGM706-S

2.63V for SGM706-R

 Guaranteed

RESET

Valid at V

= 1V

 200ms Reset Pulse Width

 Debounced TTL/CMOS-Compatible

Manual-Reset Input

 Independent Watchdog Timer (1.6sec) Timeout

 Voltage Monitor for Power-Fail or Low-Battery Warning

 -40℃ to +85℃ Operating Temperature Range

 Green SOIC-8 Package

APPLICATIONS

Computers

Controllers

Intelligent Instruments

Automotive Systems

Critical μP Power Monitoring

REV. A. 2

SG Micro Corp

www.sg-micro.com

Low-Cost, Microprocessor

SGM706 Supervisory Circuit

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 SGM706-LYS8G/TR SGM706-LYS8 Tape and Reel, 2500

4.40 SOIC-8 SGM706-MYS8G/TR SGM706-MYS8 Tape and Reel, 2500

4.0 SOIC-8 SGM706-JYS8G/TR SGM706-JYS8 Tape and Reel, 2500

3.08 SOIC-8 SGM706-TYS8G/TR SGM706-TYS8 Tape and Reel, 2500

2.93 SOIC-8 SGM706-SYS8G/TR SGM706-SYS8 Tape and Reel, 2500

SGM706

2.63 SOIC-8 SGM706-RYS8G/TR SGM706-RYS8 Tape and Reel, 2500

NOTE: Order number is defined as the follow:

ORDER NUMBER

SGM 706- 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

= +25℃, unless otherwise noted.)

Terminal Voltage (with respect to GND)

....................................................................... -0.3V to 6.0V

All Other Inputs........................................ -0.3V to (V

+ 0.3V)

Input Current, V

..............................................................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.

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