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SGM812-ZXKA4

Description
Microprocessor Supervisory with Manual Reset Input
File Size478KB,9 Pages
ManufacturerSG Micro Corp(SGMICRO)
Websitehttp://www.sg-micro.com/
Shengbang Microelectronics is a semiconductor company that focuses on the research and development and sales of high-performance, high-quality analog integrated circuits. Shengbang Microelectronics products have excellent performance and quality and can be widely used in many fields such as mobile phones, TVs, DVDs, digital cameras, laptops, consumer electronics, automotive electronics, industrial automation control, medical instruments, LCD displays, etc.
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Microprocessor Supervisory with Manual Reset Input

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SGM811
SGM812
GENERAL DESCRIPTION
The SGM811/SGM812 supervisory circuits monitor the
power supply voltage in microprocessor and digital
systems. The SGM811/SGM812 is designed to monitor
seven different voltages, these voltages have been selected
for the effective monitoring of 2.5V, 3 V, 3.3 V, and 5 V
supply voltage levels.
They provide a reset output during power-up,
power-down and brownout conditions. On power-up, an
internal timer holds reset asserted for 240 ms. This holds
the microprocessor in a reset state until conditions have
stabilized. The
RESET
output remains operational with
V
CC
as low as 1 V. The SGM811 provides an active low reset
signal (
RESET
) while the SGM812 provides an active high
signal (RESET) output.
The SGM811/SGM812 has a manual reset input. The
manual reset function is very useful, especially if the circuit
in which the SGM811/SGM812 is operating enters into a
state that can only be detected by the user. Allowing the
user to reset a system manually can reduce the damage or
danger that could otherwise be caused by an out-of-control
or locked system. The devices come in a 4-pin SOT143
and 5-pin SOT23 packages.
Microprocessor Supervisory
with Manual Reset Input
FEATURES
Superior Upgrade for MAX811/MAX812 and
ADM811/ADM812
Specified over Temperature
Low Power Consumption (17
μA
Typ)
Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V
Options
Reset Assertion Down to 1 V V
CC
160 ms Min Power-On Reset
Logic Low
RESET
Output (SGM811)
Logic High RESET Output (SGM812)
Manual Reset Input
Compact 4-Pin SOT143 and 5-Pin SOT23 Packages
PIN CONFIGURATIONS(TOP VIEW)
SOT143-4
GND
1
4
V
CC
RESET/RESET
2
3
MR
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
SOT23-5
GND
NC
RESET/RESET
1
2
3
4
MR
5
V
CC
TYPICAL OPERATION CIRCUIT
V
CC
V
CC
MICROPROCESSOR
SYSTEM
RESET
100KO
GND
GND
SGM811
RESET
MR
Shengbang Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
Nov 2006
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