GTM GN809

ISSUED DATE :2006/08/18
REVISED DATE :
GN809
Processor Supervisory
Description
The GN809 family allows the user to customize the CPU reset function without any external components. The
user has a large choice of reset voltage thresholds and output driver configurations, all of which are preset at
the factory. Each wafer is trimmed to the customer’s specifications.
These circuits monitor the power supply voltage of up based systems. When the power supply voltage drops
below the voltage threshold a reset is asserted immediately (within an interval TD1). The reset remains asserted
after the supply voltage rises above the voltage threshold for a time interval, TD2. The reset output is active low
(RESETB). The reset output may be configured as either push/pull or open drain. The state of the reset output
is guaranteed to be correct for supply voltage greater than 1V.
Space saving SOT-23 package and micropower quiescent current (<3.0uA) make this family a natural for
portable battery powered equipment.
Features
Tight Voltage Threshold Tolerance ±1.5%
Wide Temperature Range -40 to 80
Low Quiescent Current <3.0uA
Lead Free Products Meet RoHS standards
Typical Operating Circuit
GN809
Applications
Power Supplies
Data Acquisition Systems
Applications using CPUs
Consumer Electronics
Computer Peripherals
Portable Electronics
Note:* External pull-up resistor is required if
open-drain output is used. 10k is recommended.
Package Dimensions
SOT-23
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
2.70
3.10
2.40
2.80
1.40
1.60
0.35
0.50
0
0.10
0.45
0.55
REF.
G
H
K
J
L
M
Millimeter
Min.
Max.
1.90 REF.
1.00
1.30
0.10
0.20
0.40
0.85
1.15
0
10
Block Diagram
GN809 with Push-Pull RESET
GN809
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ISSUED DATE :2006/08/18
REVISED DATE :
Pin Description
Pin Name
Pin Description
Gnd
Ground
RESETB
RESETB is active low and push-pull output
VIN
Positive power supply. A reset is asserted after this voltage drops below a predetermined. After VIN rises
above that level the reset output remains asserted until the end of the reset timeout period.
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
VIN
7
V
Input Current, VIN
20
mA
Output Current, RESETB
20
mA
100
V/ s
Input Voltage
Rate of Rise, VIN
Ambient Temperature Range
TA
-40 ~ +85
Junction Temperature Range
TJ
-40 ~ +125
Storage Temperature Range
TSTG
-65 ~ +150
Maximum Junction Temperature
Tj Max
150
jc
140
Thermal Resistance
Internal Power Dissipation
/W
ja
285
/W
PD
400
mW
Solder Iron (10 Sec)*
350
EDS Classification
B**
Caution: Stress above the listed absolute maximum rating may cause permanent damage of the device
*MIL-STDS-202G 210F
**HBM B: 2000V ~ 3999V
Electrical Characteristics Ta=25
Parameter
VIN Range
Supply Current
Reset Threshold Voltage
Symbol
VRange
IIN
(unless otherwise noted)
Min
TYP
Max
Unit
TA=-40 ~ +85
Condition
1
-
5.5
V
VIN= VTH*1.10
-
-
3.0
VIN= VTH*1.10, TA=-40 ~ +85
-
-
5.0
VTH(NOM)
-
VTH(NOM)
VTH(NOM)
-
VTH(NOM)
10
30
60
mV
30
50
160
ppm
-
-
0.2
V
0.8*VIN
-
-
V
-1.5%
VTH
TA=-40 ~ +85
Hysteresis Range (Note2)
RESET Threshold
Tempco (Note2)
RESETB Output
Voltage Low
VHYST
VOL
-2.0%
VRelease-VTH (Note1)
VIN<VTH(MIN), ISINK=1.2mA
TA=-40 ~ +85
ISOURCE=0.5mA
VIN>1.8V
RESETB Output
Voltage High
VOH
VIN>VTH(MAX)
VIN to Reset Delay
Reset Timeout Period
TD1
TD2
VIN= VTH-100mV, TA=-40 ~ +85
TA=-40 ~ +85
ISOURCE=0.15mA
1.8V VIN>1.0V
A
+1.5%
mV
+2.0%
-
40
-
80
150
230
S
mS
Note 1: The data based on V TH=2.7V part type.
2: Guaranteed by Design
GN809
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ISSUED DATE :2006/08/18
REVISED DATE :
Ordering Information ( contd.)
Part Number
Marking
Output Voltage
Part Number
Marking
Output Voltage
GN809-20
820XX
2.00V
GN809-21
821XX
2.10V
GN809-23
823XX
2.32V
GN809-26
826XX
2.63V
GN809-29
829XX
2.93V
GN809-31
831XX
3.08V
GN809-46
846XX
4.63V
Timing Diagram
Application Information
Supply Transients
These device have a certain immunity to fast negative going transients. In the following pages the graph
titled “Glitch Rejection” indicates the maximum allowable glitch amplitude and duration to avoid triggering an
unintended reset. As shown in the graph shorter transient can have large amplitudes without triggering resets.
Characteristics Curve
GN809
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ISSUED DATE :2006/08/18
REVISED DATE :
GN809-26
GN809-26
GN809-26
210
190
170
150
GN809-26
130
110
90
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.
GTM reserves the right to make changes to its products without notice.
GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.
GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.
TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785
China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China
TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165
GN809
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