SS811 Datasheet, PDF (1/8 Pages) Silicon Standard Corp. – Reset Circuits with Manual Reset Input

SS811, SS812
Reset Circuits with Manual Reset Input
FEATURES
Ultra-low supply current of 1µA (typ.)
Guaranteed reset valid to Vcc=0.9V
Available in two output yypes:
Push-pull active-low (SS811)
Push-pull active-high (SS812)
Power-on reset pulse width minimum 140ms
Internally fixed threshold 2.3V, 2.6V, 2.9V, 3.1V, 4.0V,
4.4V, and 4.6V
Tight voltage threshold tolerance: 1.5%
Low profile package: SOT-23-5
APPLICATIONS
l Notebook Computers
l Digital Still Cameras
l PDAs
l Critical Microprocessor Monitoring
DESCRIPTION
The SS811 and SS812 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.
The SS811 and SS812 also offer a manual reset input.
These devices perform as valid singles in applications
with Vcc ranging from 6.0V down to 0.9V. The reset
signal lasts for a minimum period of 140ms whenever the
VCC supply voltage falls below a preset threshold. Both
the SS811 and SS812 were designed with a reset
comparator to help identify invalid signals lasting less
than 140ms. The only difference between the SS811 and
the SS812 is that one has an active-low RESET output
and the other has an active-high RESET output.
TYPICAL APPLICATION CIRCUIT
V_CC
VCC
SS811
(SS812)
RESET
MR ^(RESET)
GND
A low supply current (1µA) makes the SS811 and
SS812 ideal for portable equipment. The devices are
available in a SOT-23-5 package.
VCC
µP
RESET
INPUT
GND
Pushbutton
Switch
Rev.1.01 4/06/2004
www.SiliconStandard.com
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