Global Mixed-mode Technology Inc.
G692/G693
4-Pin 碌P Voltage Monitors with Manual Reset Input
Features
Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
General Description
The G692/G693 are microprocessor (碌P) supervisory
circuits used to monitor the power supplies in 碌P 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. The G692/G693 also provide a de-
bounced manual reset input.
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 G693L has an open-drain output stage, while the
G692 have push-pull outputs. The G693L鈥檚 open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than V
CC
. The G692L
have an active-low RESET output, while the G692H
has an active-high RESET output. The reset com-
parator 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 G692/G693 ideal for
use in portable equipment. The G692/G693 are avail-
able in a 4-pin SOT143 packages.
Fully Specified Over Temperature
Available in Three Output Configurations
Push-Pull RESET Output (G692L)
Push-Pull RESET Output (G692H)
Open-Drain RESET Output (G693L)
140ms min Power-On Reset Pulse Width
5碌A(chǔ) Supply Current
Guaranteed Reset Valid to V
CC
= +1V
Power Supply Transient Immunity
No External Components
Manual Reset Input
4-Pin SOT143 Package
Applications
Computers
Controllers
Intelligent Instruments
Critical 碌P and 碌C Power Monitoring
Portable / Battery-Powered Equipment
Automotive
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
SOT143
SOT143
G692H(L)xxxTC -40擄C ~ +105擄C
G693LxxxTC
-40擄C ~ +105擄C
* xxx specifies the threshold voltage.
e.g. 263 denotes the 2.63V threshold voltage.
Pin Configuration
Typical Operating Circuit
V
CC
GND
1
4
V
CC
V
CC
R
PULL-UP
*
V
CC
G692/G693
G692/G693
MR
RESET
(RESET)
GND
RESET
INPUT
碌P
GND
RESET(RESET)
2
SOT143
3
MR
()is for G692H
*G693 ONLY
Ver: 1.0
Sep 23, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
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