Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G690/G691
Global Mixed-mode Technology Inc.
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 (G690L)
Push-Pull RESET Output (G690H)
Open-Drain RESET Output (G691L)
140ms min Power-On Reset Pulse Width
10A Supply Current
Guaranteed Reset Valid to V
CC
= +1V
Power Supply Transient Immunity
No External Components
3-Pin SOT89, SOT23 and SC70 Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical P and C Power Monitoring
Portable / Battery-Powered Equipment
Automotive
General Description
The G690/G691 are microprocessor (P) supervisory
circuits used to monitor the power supplies in 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.
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 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 V
CC
. The G690L
have an active-low RESET output, while the G690H
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 G690/G691 ideal for
use in portable equipment. The G690/G691 are avail-
able in 3-pin SOT89 or SOT23 or SC70 packages.
Pin Configuration Typical Application
RESET
INPUT
GND
P
V
CC
RESET
(RESET)
GND
G690/G691
V
CC
R
PULL-UP
V
CC
*
*G691 ONLY
SOT23/SC70
SOT 89
1
2
1
2
3
3
RESET
INPUT
GND
P
V
CC
RESET
(RESET)
GND
G690/G691
V
CC
R
PULL-UP
V
CC
*
*G691 ONLY
SOT23/SC70
SOT 89
1
2
1
2
3
3
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G690/G691
Global Mixed-mode Technology Inc.
Ordering Information
PART TEMP.
RANGE
OUTPUT
TYPE
G690LxxxTxx
-40C ~ +105C
Push-Pull Active Low
G690HxxxTxx
-40C ~ +105C
Push-Pull Active High
G691LxxxTxx
-40C ~ +105C
Open-Drain
Order Number Identification
G69XX XXX TX X
Pin Option
Package Type
Threshold Voltage Option
Part Number
PART NUMBER
THRESHOLD VOLTAGE OPTION
G690L : Push-Pull Active Low Output
* xxx specifies the threshold voltage.
G690H : Push-Pull Active High Output
e.g. 263 denotes the 2.63V threshold voltage.
G691L : Open-Drain Output
PACKAGE TYPE
PIN OPTION
T2 : SOT 89
1
2
3
T7 : SOT 23
1 :
RESET
GND
V
CC
T9 : SC 70
2 :
RESET
V
CC
GND
3 : GND
RESET
V
CC
4 : GND
V
CC
RESET
5 : V
CC
GND
RESET
6 : V
CC
RESET
GND
*RESET for G690H
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G690/G691
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Terminal Voltage (with respect to GND)
V
CC
..................................................-0.3V to +6.0V
RESET, RESET (push-pull)...........-0.3V to (V
CC
+ 0.3V)
RESET (open drain).............................-0.3V to +6.0V
Input Current, V
CC
................................................20mA
Output Current, RESET, RESET ........................20mA
Continuous Power Dissipation (T
A
= +70C)
3-Pin SOT89..............................................500mW
3-Pin SOT23 (derate 4mW/C above +70C)....320mW
3-Pin SC70 (derate 2.17mW/C above +70C)..174mW
Operating Temperature Range ...........-40C to +105C
Storage Temperature Range..............-65C to +150C
Lead Temperature (soldering, 10s) ..................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rat-
ings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of
the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(V
CC
= full range, T
A
= -40C to +105C, unless otherwise noted. Typical values are at T
A
= +25C, V
CC
= 5V
for 463/438/400 versions, V
CC
= 3.3V for 308/293 versions, and V
CC
= 3V for 263 version.) (Note 1)
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
T
A
= 0C +70C
1.0
5.5
V
CC
Range
T
A
= -40C +105C
1.2
5.5
V
V
CC
<5.5V, G69_ _463/438/400_
22
30
Supply Current (SOT23)
I
CC
T
A
= -40C +105C
V
CC
<3.6V, G69_ _308/293/263_
10
23
A
T
A
= +25C
4.56 4.63
4.70
T
A
= -40C to +85C
4.50
4.75
G69_ _463_
T
A
= +85C to +105C
4.40
4.86
T
A
= +25C
4.31 4.38
4.45
T
A
= -40C to +85C
4.25
4.50
G69_ _438_
T
A
= +85C to +105C
4.16
4.56
T
A
= +25C
3.93 4.00
4.06
T
A
= -40C to +85C
3.89
4.10
G69_ _400_
T
A
= +85C to +105C
3.80
4.20
T
A
= +25C
3.04
3.08 3.11
T
A
= -40C to +85C
3.00
3.15
G69_ _308_
T
A
= +85C to +105C
2.92
3.23
T
A
= +25C
2.89
2.93 2.96
T
A
= -40C to +85C
2.85
3.00
G69_ _293_
T
A
= +85C to +105C
2.78
3.08
T
A
= +25C
2.59
2.63 2.66
T
A
= -40C to +85C
2.55
2.70
Reset Threshold
V
TH
G69_ _263_
T
A
= +85C to +105C
2.50
2.76
V
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G690/G691
Global Mixed-mode Technology Inc.
Electrical Characteristics
(Continued)
(V
CC
= full range, T
A
= -40C to +105C, unless otherwise noted. Typical values are at T
A
= +25C, V
CC
= 5V
for 463/438/400 versions, V
CC
= 3.3V for 308/293 versions, and V
CC
= 3V for 263 version.) (Note 1)
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
Reset Threshold Tempco
40
ppm/C
V
CC
to Reset Delay (Note 2)
V
CC
= V
TH
to (V
TH
100mV)
7
s
V
CC
= V
TH
max,
G69_ _ 463/438/400
280 640
Reset Active Timeout Period
V
CC
= V
TH
max,
G69_ _308/293/263
140 550
ms
RESET
Output Current Low (push-pull active low,
and open-drain active-low, G690L and G691L)
I
OL
V
CC
= 2.5V, V
RESET
= 0.5V
8 mA
V
CC
= 5V, V
RESET
= 4.5V,
G690L463/438/400
4.5
V
CC
= 3.3V, V
RESET
= 2.8V,
G690L308/293
3
RESET
Output Current High (push-pull active
low, G690L)
I
OH
V
CC
= 3V, V
RESET
= 2.5V,
G690L263
2
mA
V
CC
= 5V, V
RESET
= 0.5V,
G690H463/438/400
16
V
CC
= 3.3V, V
RESET
= 0.5V,
G690H308/293
12
RESET Output Current Low (push-pull active
high, G690H)
I
OL
V
CC
= 3V, V
RESET
= 0.5V,
G690H263
10
mA
RESET Output Current High (push-pull active
high, G690H)
I
OH
V
CC
= 2.5V, V
RESET
= 2V
2
mA
RESET
Open-Drain Output Leakage Current
(G691L)
V
CC
> V
TH
, RESET deasserted
1 A
Note 1: Production testing done at T
A
= +25C; limits over temperature guaranteed by design.
Note 2: RESET output is for G690L/G691L; While RESET output is for G690H.
Selector Guide
TOP MARK
PART/SUFFIX
RESET THRESHOLD (V)
OUTPUT TYPE
SOT 89
SOT 23
SC70
G691L463Tx1 4.63
Open-Drain
689Fx
689Fx
689Fx
G691L438Tx1 4.38
Open-Drain
689Ex
689Ex
689Ex
G691L400Tx1 4.00
Open-Drain
689Dx
689Dx
689Dx
G691L308Tx1 3.08
Open-Drain
689Cx
689Cx
689Cx
G691L293Tx1 2.93
Open-Drain
689Bx
689Bx
689Bx
G691L263Tx1 2.63
Open-Drain
689Ax
689Ax
689Ax
G690H463Tx1 4.63 Push-Pull
RESET
688Lx
688Lx
688Lx
G690H438Tx1 4.38 Push-Pull
RESET
688Kx
688Kx
688Kx
G690H400Tx1
4.00
Push-Pull
RESET 688Jx 688Jx 688Jx
G690H308Tx1
3.08
Push-Pull
RESET 688Ix 688Ix 688Ix
G690H293Tx1 2.93 Push-Pull
RESET
688Hx
688Hx
688Hx
G690H263Tx1 2.63 Push-Pull
RESET
688Gx
688Gx
688Gx
G690L463Tx1 4.63
Push-Pull
688Fx
688Fx
688Fx
G690L438Tx1 4.38
Push-Pull
688Ex
688Ex
688Ex
G690L400Tx1 4.00
Push-Pull
688Dx
688Dx
688Dx
G690L308Tx1 3.08
Push-Pull
688Cx
688Cx
688Cx
G690L293Tx1 2.93
Push-Pull
688Bx
688Bx
688Bx
G690L263Tx1 2.63
Push-Pull
688Ax
688Ax
688Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G690/G691
Global Mixed-mode Technology Inc.
Selector Guide
TOP MARK
PART/SUFFIX
RESET THRESHOLD (V)
OUTPUT TYPE
SOT 89
SOT 23
SC70
G691L463Tx2
4.63
Open-Drain 687Fx 687Fx 687Fx
G691L438Tx2
4.38
Open-Drain 687Ex 687Ex 687Ex
G691L400Tx2
4.00
Open-Drain 687Dx 687Dx 687Dx
G691L308Tx2
3.08
Open-Drain 687Cx 687Cx 687Cx
G691L293Tx2
2.93
Open-Drain 687Bx 687Bx 687Bx
G691L263Tx2
2.63
Open-Drain
687Ax 687Ax 687Ax
G690H463Tx2
4.63
Push-Pull
RESET 686Lx 686Lx 686Lx
G690H438Tx2
4.38
Push-Pull
RESET 686Kx 686Kx 686Kx
G690H400Tx2
4.00
Push-Pull
RESET 686Jx 686Jx 686Jx
G690H308Tx2
3.08
Push-Pull
RESET 686Ix 686Ix 686Ix
G690H293Tx2
2.93
Push-Pull
RESET 686Hx 686Hx 686Hx
G690H263Tx2
2.63
Push-Pull
RESET 686Gx 686Gx 686Gx
G690L463Tx2
4.63
Push-Pull
686Fx 686Fx 686Fx
G690L438Tx2
4.38
Push-Pull
686Ex 686Ex 686Ex
G690L400Tx2
4.00
Push-Pull
686Dx 686Dx 686Dx
G690L308Tx2
3.08
Push-Pull
686Cx 686Cx 686Cx
G690L293Tx2
2.93
Push-Pull
686Bx 686Bx 686Bx
G690L263Tx2
2.63
Push-Pull
686Ax 686Ax 686Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
Selector Guide
TOP MARK
PART/SUFFIX
RESET THRESHOLD (V)
OUTPUT TYPE
SOT 89
SOT 23
SC70
G691L463Tx3
4.63
Open-Drain 691Fx 691Fx 691Fx
G691L438Tx3
4.38
Open-Drain 691Ex 691Ex 691Ex
G691L400Tx3
4.00
Open-Drain 691Dx 691Dx 691Dx
G691L308Tx3
3.08
Open-Drain 691Cx 691Cx 691Cx
G691L293Tx3
2.93
Open-Drain 691Bx 691Bx 691Bx
G691L263Tx3
2.63
Open-Drain
691Ax 691Ax 691Ax
G690H463Tx3
4.63
Push-Pull
RESET 690Lx 690Lx 690Lx
G690H438Tx3
4.38
Push-Pull
RESET 690Kx 690Kx 690Kx
G690H400Tx3
4.00
Push-Pull
RESET 690Jx 690Jx 690Jx
G690H308Tx3
3.08
Push-Pull
RESET 690Ix 690Ix 690Ix
G690H293Tx3
2.93
Push-Pull
RESET 690Hx 690Hx 690Hx
G690H263Tx3
2.63
Push-Pull
RESET 690Gx 690Gx 690Gx
G690L463Tx3
4.63
Push-Pull
690Fx 690Fx 690Fx
G690L438Tx3
4.38
Push-Pull
690Ex 690Ex 690Ex
G690L400Tx3
4.00
Push-Pull
690Dx 690Dx 690Dx
G690L308Tx3
3.08
Push-Pull
690Cx 690Cx 690Cx
G690L293Tx3
2.93
Push-Pull
690Bx 690Bx 690Bx
G690L263Tx3
2.63
Push-Pull
690Ax 690Ax 690Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
PDF 
ZIP