www.SiliconStandard.com

1 of 9

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

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

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

below a preset threshold, keeping it asserted for at least

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

SS8037L has an active-low

RESET

output, while the

SS8037H has an active-high RESET output. The reset

and the outputs are guaranteed to be in the correct logic

Low supply current makes the SS8037/8 ideal for use

in portable equipment. They are available in a 3-pin

SOT23-3 package.

PIN CONFIGURATION

TYPICAL APPLICATION

RESET

INPUT

GND

µP

V

CC

RESET

(RESET)

GND

V

CC

R

PULL-UP

V

CC

*

*SS8038 ONLY

SOT23-3

1

2

3

RESET

INPUT

GND

µP

V

CC

RESET

(RESET)

GND

SS8037/8

V

CC

This device is supplied with Pb-free lead finish (second-level interconnect).

SS8037/8(G)

10/6/2004 Rev.2.20