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 SOT89 or SOT23 or SC70 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 SOT89, SOT23 and SC70 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
3
1
2
GND
RESET
INPUT
µP
GND
SOT 89
SOT23/SC70
*G691 ONLY
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Ordering Information
PART
G690LxxxTxx
G690HxxxTxx
G691LxxxTxx
TEMP. RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
G690/G691
OUTPUT TYPE
Push-Pull Active Low
Push-Pull Active High
Open-Drain
Order Number Identification
G69XX
XXX
TX
X
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
T2 : SOT 89
T7 : SOT 23
T9 : SC 70
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: 1.3
Oct 31, 2002
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 SOT89……………………………………….500mW
3-Pin SOT23 (derate 4mW/°C above +70°C)….320mW
3-Pin SC70 (derate 2.17mW/°C above +70°C)..174mW
Operating Temperature Range …........-40°C to +105°C
Storage Temperature Range..….….….-65°C to +150°C
Lead Temperature (soldering, 10s) ..…....…......+300°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 UNITS
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
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: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Electrical Characteristics
(Continued)
G690/G691
MIN
TYP MAX UNITS
40
7
280
140
8
4.5
3
2
16
12
10
2
1
mA
µA
mA
mA
640
ms
550
mA
ppm/°C
µs
(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
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.
Selector Guide
PART/SUFFIX
G691L463Tx1
G691L438Tx1
G691L400Tx1
G691L308Tx1
G691L293Tx1
G691L263Tx1
G690H463Tx1
G690H438Tx1
G690H400Tx1
G690H308Tx1
G690H293Tx1
G690H263Tx1
G690L463Tx1
G690L438Tx1
G690L400Tx1
G690L308Tx1
G690L293Tx1
G690L263Tx1
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
SOT 89
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
TOP MARK
SOT 23
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
SC70
689Fx
689Ex
689Dx
689Cx
689Bx
689Ax
688Lx
688Kx
688Jx
688Ix
688Hx
688Gx
688Fx
688Ex
688Dx
688Cx
688Bx
688Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Selector Guide
PART/SUFFIX
G691L463Tx2
G691L438Tx2
G691L400Tx2
G691L308Tx2
G691L293Tx2
G691L263Tx2
G690H463Tx2
G690H438Tx2
G690H400Tx2
G690H308Tx2
G690H293Tx2
G690H263Tx2
G690L463Tx2
G690L438Tx2
G690L400Tx2
G690L308Tx2
G690L293Tx2
G690L263Tx2
G690/G691
SOT 89
687Fx
687Ex
687Dx
687Cx
687Bx
687Ax
686Lx
686Kx
686Jx
686Ix
686Hx
686Gx
686Fx
686Ex
686Dx
686Cx
686Bx
686Ax
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
SC70
687Fx
687Ex
687Dx
687Cx
687Bx
687Ax
686Lx
686Kx
686Jx
686Ix
686Hx
686Gx
686Fx
686Ex
686Dx
686Cx
686Bx
686Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
Selector Guide
PART/SUFFIX
G691L463Tx3
G691L438Tx3
G691L400Tx3
G691L308Tx3
G691L293Tx3
G691L263Tx3
G690H463Tx3
G690H438Tx3
G690H400Tx3
G690H308Tx3
G690H293Tx3
G690H263Tx3
G690L463Tx3
G690L438Tx3
G690L400Tx3
G690L308Tx3
G690L293Tx3
G690L263Tx3
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
SOT 89
691Fx
691Ex
691Dx
691Cx
691Bx
691Ax
690Lx
690Kx
690Jx
690Ix
690Hx
690Gx
690Fx
690Ex
690Dx
690Cx
690Bx
690Ax
TOP MARK
SOT 23
691Fx
691Ex
691Dx
691Cx
691Bx
691Ax
690Lx
690Kx
690Jx
690Ix
690Hx
690Gx
690Fx
690Ex
690Dx
690Cx
690Bx
690Ax
SC70
691Fx
691Ex
691Dx
691Cx
691Bx
691Ax
690Lx
690Kx
690Jx
690Ix
690Hx
690Gx
690Fx
690Ex
690Dx
690Cx
690Bx
690Ax
Note: T2: SOT89; T7: SOT23; T9: SC70
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
Microcontroller MCU
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