SS8037 Datasheet, PDF (1/9 Pages) Silicon Standard Corp. – Microprocessor Reset IC

FEATURES
Precision monitoring of +3V, +3.3V, and +5V
power-supply voltages
Fully specified over temperature
Available in three output configurations
Push-pull RESET output (SS8037L)
Push-pull RESET output (SS8037H)
Open-drain RESET output (SS8038L)
Power-on reset pulse width of 140ms min
Supply current of 10µA
Guaranteed reset valid to V_CC = +1V
Power supply transient immunity
No external components
SOT23-3 package
APPLICATIONS
Computers
Controllers
Intelligent instruments
Critical µP and µC power monitoring
Portable / battery-powered equipment
Automotive
SS8037/8(G)
Microprocessor Reset IC
DESCRIPTION
The SS8037/8 are microprocessor (µP) supervisory
circuits used to monitor the power supplies in µP and
digital systems. They provide excellent circuit reliability
and low cost by eliminating external components and
adjustments when used with +5V, +3.3V, +3.0V- pow-
ered circuits.
These circuits perform a single function: they assert a
reset signal whenever the V_CC supply voltage declines
below a preset threshold, keeping it asserted for at least
140ms after V_CC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of
supply voltages are available.
The SS8038L has an open-drain output stage, while the
SS8037H/L have push-pull outputs. The SS8038L’s
open-drain RESET output requires a pull-up resistor
that can be connected to a voltage higher than V_CC. The
SS8037L has an active-low RESET output, while the
SS8037H has an active-high RESET output. The reset
comparator is designed to ignore fast transients on V_CC,
and the outputs are guaranteed to be in the correct logic
state for V_CC down to 1V.
Low supply current makes the SS8037/8 ideal for use
in portable equipment. They are available in a 3-pin
SOT23-3 package.
This device is supplied with Pb-free lead finish (second-level interconnect).
PIN CONFIGURATION
3
1
2
SOT23-3
TYPICAL APPLICATION
V _CC
V _CC
SS8037/8
RESET
(RESET)
GND
V _CC
R_PULL-UP*
µP
RESET
INPUT
GND
*SS8038 ONLY
10/6/2004 Rev.2.20
www.SiliconStandard.com
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