SGM803_15 Datasheet, PDF (1/13 Pages) SG Micro Corp – Microprocessor Supervisory

SGM803/SGM809/SGM810
Microprocessor Supervisory
Circuit in 3-Pin SOT-23
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
240ms. This holds the microprocessor in a reset state
until conditions have stabilized. The RESET output
remains operational with V_CC as low as 1V. The SGM803/
SGM809 provides an active low reset signal ( RESET )
while the SGM810 provides an active high signal
(RESET) output. The SGM809/SGM810 has push-pull
outputs, whereas the SGM803 has an open-drain output,
which requires an external pull-up resistor.
Eight reset threshold voltage options are available
suitable for monitoring 1.8V, 2.5V, 3V, 3.3V and 5V
supply voltages.
The reset comparator features built-in glitch immunity,
making it immune to fast transients on V_CC.
The low supply current of typically 13μA makes the
SGM803/SGM809/SGM810 ideal for use in portable,
battery operated equipment. All are specified over the
extended -40℃ to +125℃ temperature range.
FEATURES
● Precision Voltage Monitor: 1.8V, 2.5V, 3V, 3.3V, 5V
Options
● Superior Upgrade for MAX803/MAX809/MAX810
and ADM803/ADM809/ADM810
● Fully Specified over Temperature
● Low Power Consumption (13μA TYP)
● Reset Assertion Down to 1V V_CC
● 150ms Min Power-On Reset
Open-Drain RESET Output (SGM803)
Push-Pull RESET Output (SGM809)
Push-Pull RESET Output (SGM810)
● -40℃ to +125℃ Operating Temperature Range
● Small Packaging
SGM803 Available in SOT-23-3 and SOT-23
SGM809 Available in SOT-23-3 and SOT-23
SGM810 Available in SOT-23-3 and SOT-23
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
TYPICAL OPERATION CIRCUIT
V_CC
SGM803/SGM809
RESET
GND
RPULL-UP
SGM803
only
V_CC
MICROPROCESSOR
SYSTEM
RESET
GND
PIN CONFIGURATIONS (TOP VIEW)
GND 1
RESET/RESET 2
SGM803
SGM809
SGM810
3 V_CC
SOT-23-3 / SOT-23
SG Micro Corp
www.sg-micro.com
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