Microprocessor Reset IC --G690L293T73Uf    SOT-23

G671L263T93U

G682L09TT12U

G690L293T73Uf

G692L293TCUf

G693L263TCUf

G693L293TCUf

General Description

The G690/G691 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- powered

circuits.

These circuits perform a single function: they assert a

reset signal whenever the VCC supply voltage declines

below a preset threshold, keeping it asserted for at

least 140ms after VCC has risen above the reset

threshold. Reset thresholds suitable for operation with

a variety of supply voltages are available.

The G691L has an open-drain output stage, while the

G690 have push-pull outputs. The G691L’s open-drain

RESET output requires a pull-up resistor that can be

connected to a voltage higher than VCC. The G690L

have an active-low RESET output, while the G690H

has an active-high RESET output. The reset comparator

is designed to ignore fast transients on VCC,

and the outputs are guaranteed to be in the correct

logic state for VCC down to 1V.

Low supply current makes the G690/G691 ideal for use

in portable equipment. The G690/G691 are available in

3-pin SOT-23 and SC-70-3(SOT-323) packages.