SS809/810G
3-Pin Microprocessor Reset Circuits
FEATURES
DESCRIPTION
Ultra-low supply current 1mA (typ.)
Guaranteed reset valid to Vcc=0.9V
Available in three output types:
Open-drain active low (SS809N-xxGx)
Push-pull active low (SS809-xxGx)
Push-pull active high (SS810-xxGx)
Power-on reset pulse width min. 140ms
Internally fixed threshold 2.3V, 2.6V, 2.9V, 3.1V,
4.0V, 4.4V, 4.6V
The SS809G and SS810G are low-power microprocessor
(µP) supervisory circuits used to monitor power supplies
in µP and digital systems. They improve circuit reliability
and reduce cost by eliminating external components.
These devices provide valid signals in applications
with Vcc ranging from 6.0V down to 0.9V. The reset
signal lasts for a minimum period of 140mswhenever the
VCC supply voltage falls below a preset threshold. Both
the SS809G and SS810G were designed with a reset
comparator to help identify invalid signals lasting less
than 140ms. The only difference between the two
devices is that one has an active-low RESET output
and the other an active-high RESET output.
Tight voltage threshold tolerance: 1.5%
Packaged in RoHS-compliant SOT-23-3
APPLICATIONS
l Notebook Computers
l Digital Still Cameras
l PDAs
l Critical Microprocessor Monitoring
Low supply current (1mA) makes the SS809G and SS810G
ideal for portable equipment. The devices are available in
a SOT-23-3 package.
TYPICAL APPLICATION CIRCUIT
V
CC
VCC
VCC
SS809G
(SS810G)
mP
RESET
INPUT
RESET
(RESET)
GND
GND
Push-Pull Output
9/20/2006 Rev.3.01
www.SiliconStandard.com
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