SGM803 Datasheet, PDF (1/9 Pages) SG Micro Corp – Microprocessor Supervisory Circuit in 3-Pin SOT23

SGM803
SGM809
SGM810
Microprocessor Supervisory
Circuit in 3-Pin SOT23
GENERAL DESCRIPTION
The SGM803/SGM809/SGM810 supervisory circuits
monitor the power supply voltage in microprocessor and
digital systems. 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 VCC as low as 1 V. The SGM803/SGM809
provides an active low reset signal ( RESET ) while the
SGM810 provides an active high signal (RESET) output.
The SGM809/SGM810 have push-pull outputs, whereas the
SGM803 has an open-drain output, which requires an
external pull-up resistor.
Seven reset threshold voltage options are available suitable
for monitoring 2.5V, 3V, 3.3V, and 5V supply voltages.
The reset comparator features built-in glitch immunity,
making it immune to fast transients on VCC.
The low supply current of typically 17µA makes the
SGM803/SGM809/SGM810 ideal for use in portable, battery
operated equipment. They are available in the 3-pin SOT23
package.
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
TYPICAL OPERATION CIRCUIT
VCC
SGM803/SGM809
RESET
RPULL-UP
SGM803 only
VCC
MICROPROCESSOR
SYSTEM
RESET
GND
GND
FEATURES
− Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V
Options
− Superior Upgrade for MAX803/MAX809/MAX810
and SGM803/SGM809/SGM810
− Fully Specified over Temperature
− Low Power Consumption (17μA Typ)
− Reset Assertion Down to 1 V VCC
− 160 ms Min Power-On Reset
Open-Drain RESET Output(SGM803)
Push-Pull RESET Output (SGM809)
Push-Pull RESET Output (SGM810)
− Compact 3-Pin SOT23 Package
PIN CONFIGURATIONS（TOP VIEW）
GND 1
RESET/RESET ²
SGM803
SGM809
SGM810
3 V_CC
SOT23-3
RESET 1
GND ²
SGM809-
ZXN3L
(only)
3 V_CC
SOT23-3(L-Type)
Shengbang Microelectronics Co, Ltd
Tel: [phone]
www.sg-micro.com
REV. B