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.
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
10
µ
A Supply Current
Guaranteed Reset Valid to V
CC
= +1V
Power Supply Transient Immunity
No External Components
3-Pin SOT-23 Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical
µ
P and
µ
C Power Monitoring
Portable / Battery-Powered Equipment
Automotive
Low supply current makes the G690/G691 ideal for
use in portable equipment. The G690/G691 are avail-
able in 3-pin SOT-23 packages.
Pin Configuration
Typical Application Circuit
V
CC
3
V
CC
R
PULL-UP
*
V
CC
G690/G691
RESET
(RESET)
1
2
GND
µP
RESET
INPUT
GND
SOT-23
*G691 ONLY
Ver: 2.0
Aug 07, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Ordering Information
ORDER
NUMBER
G690LxxxT7xU
G690HxxxT7xU
G691LxxxT7xU
G690/G691
OUTPUT TYPE
PACKAGE
SOT-23
SOT-23
SOT-23
ORDER NUMBER
(Pb free)
G690LxxxT7xUf
G690HxxxT7xUf
G691LxxxT7xUf
TEMP.
RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
Push-Pull Active Low
Push-Pull Active High
Open-Drain
Order Number Identification
G69XX XXX T7
X X (f)
Pb free
Packing Type
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 : SOT-23
Pin Option
1
1 :
RESET
2 :
RESET
3 : GND
2
GND
V
CC
RESET
3
V
CC
GND
V
CC
RESET
RESET
Packing Type
U: Tape & Reel
4 : GND
5 : V
CC
6 : V
CC
*RESET for G690H
V
CC
GND
RESET
GND
Ver: 2.0
Aug 07, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Selector Guide
ORDER
NUMBER
G691L463T71U
G691L438T71U
G691L400T71U
G691L308T71U
G691L293T71U
G691L263T71U
G690H463T71U
G690H438T71U
G690H400T71U
G690H308T71U
G690H293T71U
G690H263T71U
G690L463T71U
G690L438T71U
G690L400T71U
G690L308T71U
G690L293T71U
G690L263T71U
G690/G691
TOP MARK
SOT-23
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
ORDER NUMBER
RESET THRESHOLD (V)
(Pb free)
G691L463T71Uf
G691L438T71Uf
G691L400T71Uf
G691L308T71Uf
G691L293T71Uf
G691L263T71Uf
G690H463T71Uf
G690H438T71Uf
G690H400T71Uf
G690H308T71Uf
G690H293T71Uf
G690H263T71Uf
G690L463T71Uf
G690L438T71Uf
G690L400T71Uf
G690L308T71Uf
G690L293T71Uf
G690L263T71Uf
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: SOT-23
Not all product options are ready for mass production, please contact factory for availability.
Selector Guide
ORDER
NUMBER
G691L463T72U
G691L438T72U
G691L400T72U
G691L308T72U
G691L293T72U
G691L263T72U
G690H463T72U
G690H438T72U
G690H400T72U
G690H308T72U
G690H293T72U
G690H263T72U
G690L463T72U
G690L438T72U
G690L400T72U
G690L308T72U
G690L293T72U
G690L263T72U
ORDER NUMBER
(Pb free)
G691L463T72Uf
G691L438T72Uf
G691L400T72Uf
G691L308T72Uf
G691L293T72Uf
G691L263T72Uf
G690H463T72Uf
G690H438T72Uf
G690H400T72Uf
G690H308T72Uf
G690H293T72Uf
G690H263T72Uf
G690L463T72Uf
G690L438T72Uf
G690L400T72Uf
G690L308T72Uf
G690L293T72Uf
G690L263T72Uf
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
SOT-23
687Fx
687Ex
687Dx
687Cx
687Bx
687Ax
686Lx
686Kx
686Jx
686Ix
686Hx
686Gx
686Fx
686Ex
686Dx
686Cx
686Bx
686Ax
Note: T7: SOT-23
Not all product options are ready for mass production, please contact factory for availability.
Ver: 2.0
Aug 07, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Selector Guide
ORDER
NUMBER
G691L463T73U
G691L438T73U
G691L400T73U
G691L308T73U
G691L293T73U
G691L263T73U
G690H463T73U
G690H438T73U
G690H400T73U
G690H308T73U
G690H293T73U
G690H263T73U
G690L463T73U
G690L438T73U
G690L400T73U
G690L308T73U
G690L293T73U
G690L263T73U
G690/G691
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
ORDER NUMBER
(Pb free)
G691L463T73Uf
G691L438T73Uf
G691L400T73Uf
G691L308T73Uf
G691L293T73Uf
G691L263T73Uf
G690H463T73Uf
G690H438T73Uf
G690H400T73Uf
G690H308T73Uf
G690H293T73Uf
G690H263T73Uf
G690L463T73Uf
G690L438T73Uf
G690L400T73Uf
G690L308T73Uf
G690L293T73Uf
G690L263T73Uf
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
TOP MARK
SOT-23
691Fx
691Ex
691Dx
691Cx
691Bx
691Ax
690Lx
690Kx
690Jx
690Ix
690Hx
690Gx
690Fx
690Ex
690Dx
690Cx
690Bx
690Ax
Note: T7: SOT-23
Not all product options are ready for mass production, please contact factory for availability.
Ver: 2.0
Aug 07, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
4
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
G690/G691
Output Current, RESET, RESET . . . . . . . . . . . . .20mA
Operating Temperature Range . . . . . . .-40
°
C to 105
°
C
Storage Temperature Range
. . . . . . . . . .
-65
°
C to 150
°
C
Reflow Temperature (soldering, 10sec)
. . . . . . . .
260
°
C
Stresses beyond those listed under
“
Absolute Maximum Ratings
”
may cause permanent damage to the device. These are stress ratings
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
= 25
°
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 (SOT-23)
I
CC
V
CC
<5.5V, G69_ _463/438/400_
V
CC
<3.6V, G69_ _308/293/263_
G69_ _463_
G69_ _438_
G69_ _400_
G69_ _308_
G69_ _293_
G69_ _263_
Reset Threshold Tempco
V
CC
to Reset Delay (Note 2)
Reset Active Timeout Period
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
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
SYMBOL
CONDITION
MIN
1.0
---
---
4.56
4.31
3.93
3.03
2.88
2.59
---
---
280
150
TYP MAX
---
22
10
4.63
4.38
4.00
3.08
2.93
2.63
40
7
---
---
5.5
30
23
4.70
4.45
4.06
3.12
2.97
2.67
---
---
640
UNIT
V
µA
Reset Threshold
V
TH
V
ppm/°C
µs
ms
550
RESET
Output Current Low (push-pull active
low, and open-drain active-low, G690L and
G691L)
8
---
---
mA
4.5
3
2
16
12
10
2
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
1
mA
µA
mA
mA
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)
I
OH
RESET
Open-Drain Output Leakage Current
V
CC
> V
TH
,
RESET
deasserted
(G691L)
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: 2.0
Aug 07, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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