Global Mixed-mode Technology Inc.
G690/G691
Microprocessor Reset IC
Features
Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
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- 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 SOT23 packages.
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
10µA Supply Current
Guaranteed Reset Valid to V
CC
= +1V
Power Supply Transient Immunity
No External Components
3-Pin SOT23 Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable / Battery-Powered Equipment
Automotive
Pin Configuration
Typical Application
V
CC
3
V
CC
R
PULL-UP
*
V
CC
G690/G691
RESET
(RESET)
1
2
GND
RESET
INPUT
µP
GND
SOT23
*G691 ONLY
Ver: 1.6
Mar 22, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Ordering Information
PART
G690LxxxT7x
G690LxxxT7xf
G690HxxxT7x
G690HxxxT7xf
G691LxxxT7x
G691LxxxT7xf
TEMP. RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
G690/G691
OUTPUT TYPE
Push-Pull Active Low
Push-Pull Active Low
Push-Pull Active High
Push-Pull Active High
Open-Drain
Open-Drain
Order Number Identification
G69XX
XXX
T7
X(f)
Pb free
Pin Option
Package Type
Threshold Voltage Option
Part Number
PART NUMBER
G690L : Push-Pull Active Low Output
G690H : Push-Pull Active High Output
G691L : Open-Drain Output
THRESHOLD VOLTAGE OPTION
* xxx specifies the threshold voltage.
e.g. 263 denotes the 2.63V threshold voltage.
PACKAGE TYPE
T7 : SOT23
PIN OPTION
1
1 :
RESET
2 :
RESET
3 : GND
4 : GND
5 : V
CC
6 : V
CC
*RESET for G690H
2
GND
V
CC
RESET
3
V
CC
GND
V
CC
RESET
RESET
V
CC
GND
RESET
GND
Ver: 1.6
Mar 22, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
2
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
G690/G691
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 4mW/°C above +70°C)….320mW
Operating Temperature Range …........-40°C to +105°C
Storage Temperature Range..….….….-65°C to +150°C
Lead Temperature (soldering, 10s) ..…....…....….260°C
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
= -40°C to +105°C, unless otherwise noted. Typical values are at T
A
= +25°C, 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
V
CC
Range
Supply Current (SOT23)
I
CC
SYMBOL
T
A
= 0°C +70°C
T
A
= -40°C +105°C
CONDITION
MIN
1.0
1.2
TYP MAX
5.5
5.5
30
23
4.70
4.75
4.86
4.45
4.50
4.56
4.06
4.10
4.20
3.11
3.15
3.23
2.96
3.00
3.08
2.66
2.70
2.76
UNIT
V
µA
T
A
= -40°C +105°C
V
CC
<5.5V, G69_ _463/438/400_
V
CC
<3.6V, G69_ _308/293/263_
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +85°C to +105°C
4.56
4.50
4.40
4.31
4.25
4.16
3.93
3.89
3.80
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
22
10
4.63
G69_ _463_
4.38
G69_ _438_
4.00
G69_ _400_
Reset Threshold
V
TH
G69_ _308_
3.08
V
2.93
G69_ _293_
2.63
G69_ _263_
Ver: 1.6
Mar 22, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Electrical Characteristics
(Continued)
G690/G691
MIN
TYP MAX
40
7
280
140
8
4.5
3
2
16
12
10
2
1
mA
µA
mA
mA
640
ms
550
mA
(V
CC
= full range, T
A
= -40°C to +105°C, unless otherwise noted. Typical values are at T
A
= +25°C, 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
Reset Threshold Tempco
V
CC
to Reset Delay (Note 2)
Reset Active Timeout Period
SYMBOL
CONDITION
V
CC
= V
TH
to (V
TH
– 100mV)
V
CC
= V
TH
max,
G69_ _ 463/438/400
V
CC
= V
TH
max,
G69_ _308/293/263
UNIT
ppm/°C
µs
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
V
CC
= 5V, V
RESET
= 4.5V,
G690L463/438/400
V
CC
= 3.3V, V
RESET
= 2.8V,
G690L308/293
V
CC
= 3V, V
RESET
= 2.5V,
G690L263
V
CC
= 5V, V
RESET
= 0.5V,
G690H463/438/400
V
CC
= 3.3V, V
RESET
= 0.5V,
G690H308/293
V
CC
= 3V, V
RESET
= 0.5V,
G690H263
V
CC
= 2.5V, V
RESET
= 2V
V
CC
> V
TH
,
RESET
deasserted
RESET
Output Current High (push-pull active
low, G690L)
I
OH
RESET Output Current Low (push-pull active
high, G690H)
I
OL
RESET Output Current High (push-pull active
high, G690H)
RESET
Open-Drain Output Leakage Current
(G691L)
I
OH
Note 1: Production testing done at T
A
= +25°C; limits over temperature guaranteed by design.
Note 2: RESET output is for G690L/G691L; While RESET output is for G690H.
Ver: 1.6
Mar 22, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Selector Guide
PART/SUFFIX
G691L463T71
G691L438T71
G691L400T71
G691L308T71
G691L293T71
G691L263T71
G690H463T71
G690H438T71
G690H400T71
G690H308T71
G690H293T71
G690H263T71
G690L463T71
G690L438T71
G690L400T71
G690L308T71
G690L293T71
G690L263T71
G690/G691
TOP MARK
SOT23
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
RESET THRESHOLD (V)
4.63
4.38
4.00
3.08
2.93
2.63
4.63
4.38
4.00
3.08
2.93
2.63
4.63
4.38
4.00
3.08
2.93
2.63
OUTPUT TYPE
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Note: T7: SOT23
Not all product options are ready for mass production, please contact factory for availability.
Selector Guide
PART/SUFFIX
G691L463T71f (Pb free)
G691L438T71f (Pb free)
G691L400T71f (Pb free)
G691L308T71f (Pb free)
G691L293T71f (Pb free)
G691L263T71f (Pb free)
G690H463T71f (Pb free)
G690H438T71f (Pb free)
G690H400T71f (Pb free)
G690H308T71f (Pb free)
G690H293T71f (Pb free)
G690H263T71f (Pb free)
G690L463T71f (Pb free)
G690L438T71f (Pb free)
G690L400T71f (Pb free)
G690L308T71f (Pb free)
G690L293T71f (Pb free)
G690L263T71f (Pb free)
RESET THRESHOLD (V)
4.63
4.38
4.00
3.08
2.93
2.63
4.63
4.38
4.00
3.08
2.93
2.63
4.63
4.38
4.00
3.08
2.93
2.63
OUTPUT TYPE
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
TOP MARK
SOT23
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
Note: T7: SOT23
Not all product options are ready for mass production, please contact factory for availability.
Ver: 1.6
Mar 22, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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