SGM800
Low-Power, SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
GENERAL DESCRIPTION
The SGM800 low-power micro-processor supervisor
circuit monitors system voltages from 1.6V to 5V. This
device performs a single function: it asserts a reset signal
whenever the V
CC
supply voltage falls below its reset
threshold. The reset output remains asserted for the
reset timeout period after V
CC
rises above the reset
threshold. The reset timeout is externally set by a
capacitor to provide more flexibility.
The SGM800 has an active-low, open-drain reset output.
It is available in Green SOT-23-5 package and is
specified over an ambient temperature range of -40℃ to
+85℃.
FEATURES
Monitor System Voltages from 1.6V to 5V
Capacitor-Adjustable Reset Timeout Period
Low Quiescent Current (3µA TYP)
Open-Drain
RESET
Output Option
Guaranteed
RESET
Valid to V
CC
= 1V
Immune to Short V
CC
Transients
Available in Green SOT-23-5 Package
APPLICATIONS
Portable Equipment
Battery-Powered Computers/Controllers
Automotive
Medical Equipment
Intelligent Instruments
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Computers
TYPICAL APPLICATION
V
CC
V
CC
MICROPROCESSOR
SYSTEM
SRT
C
SRT
SGM800
RESET
GND
RESET
GND
SG Micro Corp
www.sg-micro.com
REV. A. 1
SGM800
Low-Power, SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
PACKAGE/ORDERING INFORMATION
MODEL
PIN-PACKAGE
RESET
THRESHOLD (TYP)
1.63V
SGM800
SOT-23-5
2.32V
2.63V
2.93V
ORDERING
NUMBER
SGM800-1.63YN5G/TR
SGM800-2.32YN5G/TR
SGM800-2.63YN5G/TR
SGM800-2.93YN5G/TR
PACKAGE
MARKING
S69XX
S6AXX
S6BXX
S6CXX
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
NOTE: Order number and package marking are defined as the follow:
ORDER NUMBER
SGM800 - X X X G / TR
Tape and Reel
Green product
Package Type
N5
Y
1.63
2.32
2.63
2.93
SOT-23-5
-40℃ to +85℃
1.63V
2.32V
2.63V
2.93V
MARKING INFORMATION
SYY X X
Date code - Month ("A" = Jan. "B" = Feb.
…
"L" = Dec.)
Date code - Year ("A" = 2010, "B" = 2011
…)
Chip I.D.
For example: S69BA (2011, January)
Operating Temperature Range
Reset Threshold
ABSOLUTE MAXIMUM RATINGS
All Voltages Referenced to GND
V
CC
.............................................................................-0.3V to 6V
RESET
(open-drain).................................................-0.3V to 6V
Input Current (all pins)........................................................20mA
Output Current (
RESET
) ....................................................20mA
Operating Temperature Range ...........................-40℃ to +85℃
Storage Temperature Range ............................-65℃ to +150℃
Junction Temperature........................................................150℃
Lead Temperature (Soldering, 10s) ..................................260℃
ESD Susceptibility
HBM................................................................................. 3000V
MM......................................................................................300V
NOTE:
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.
SG Micro Corp
www.sg-micro.com
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage because
very small parametric changes could cause the device not to
meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
2
SGM800
Low-Power, SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
PIN CONFIGURATION
(TOP VIEW)
SGM800
SRT
1
2
5
RESET
GND
N.C.
3
4
SOT-23-5
V
CC
PIN DESCRIPTION
PIN
NAME
FUNCTION
Set Reset Timeout Input. Connect a capacitor between SRT and ground to
set the timeout period. Determine the period as follows:
t
RP
= 2.6 × 10
6
× C
SRT
+ 340 × 10
-6
with t
RP
in seconds and C
SRT
in farads.
Ground.
Not Internally Connected. Can be connected to GND.
Supply Voltage and Reset Threshold Monitor Input.
RESET
changes from high to low whenever V
CC
drops below the selected
reset threshold voltage.
RESET
remains low for the reset timeout period
1
SRT
2
3
4
5
GND
N.C.
V
CC
RESET
after V
CC
exceeds the reset threshold.
SG Micro Corp
www.sg-micro.com
3
SGM800
Low-Power, SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
ELECTRICAL CHARACTERISTICS
(V
CC
= 1V to 5.5V, T
A
= -40℃ to +85℃, typical values are at V
CC
= 5V and T
A
= +25℃, unless otherwise specified.)
PARAMETER
Supply Voltage Range
SYMBOL
V
CC
V
CC
≤
5.0V
Supply Current
I
CC
V
CC
≤
3.3V
V
CC
≤
2.0V
V
CC
Reset Threshold Accuracy
Hysteresis
V
CC
to Reset Delay
Reset Timeout Period
V
SRT
Ramp Current
V
SRT
Ramp Threshold
RESET
Output Voltage Low
CONDITIONS
MIN
1.0
TYP
MAX
5.5
UNITS
V
3.9
3.4
3.0
V
TH
- 2.5%
V
TH
- 3.5%
4 × V
TH
7.0
5.5
4.8
V
TH
+ 2.5%
V
TH
+ 3.5%
V
mV
µs
5.75
ms
nA
V
0.3
0.3
0.4
1
µA
V
μA
V
TH
V
HYST
t
RD
t
RP
I
RAMP
V
TH-RAMP
V
OL
T
A
= +25℃
T
A
= -40℃ to +85℃
V
CC
falling at 1mV/µs
C
SRT
= 1500pF
C
SRT
= 0
V
SRT
= 0 to 0.65V, V
CC
= 1.6V to 5V
V
CC
= 1.6V to 5V (V
RAMP
rising)
V
CC
≥
1.0V, I
SINK
= 50µA
V
CC
≥
2.7V, I
SINK
= 1.2mA
V
CC
≥
4.5V, I
SINK
= 3.2mA
80
3.00
4.25
0.34
210
0.6
RESET
Output Leakage Current,
Open-Drain
I
LKG
V
CC
> V
TH
, reset not asserted
SG Micro Corp
www.sg-micro.com
4
SGM800
Low-Power, SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
TYPICAL PERFORMANCE CHARACTERISTICS
V
CC
= 5V, C
SRT
= 1500pF, T
A
= +25℃, unless otherwise noted.
Supply Current vs. Supply Voltage
5
Reset Timeout Period vs. C
SRT
10000
Reset Timeout Period (ms)
+85℃
Supply Current (μA)
4
3
+25℃
2
1
V
TH
= 1.63V
0
0
1
2
3
4
5
6
Supply Voltage (V)
-40℃
1000
100
10
1
0.1
0.01
0.1
1
10
100
1000
C
SRT
(nF)
Reset Timeout Period vs. Temperature
500
Reset Timeout Period vs. Temperature
5.0
Reset Timeout Period (ms)
C
SRT
= 1500pF
4.8
4.6
4.4
4.2
4.0
Reset Timeout Period (μs)
C
SRT
= 0
460
420
380
340
300
-50
-25
0
25
50
75
100
Temperature (℃)
-50
-25
0
25
50
75
100
Temperature (℃)
Maximum Transient Duration vs. Reset
Threshold Overdrive
60
V
TH
= 2.93V
Transient Duration (µs)
50
40
30
20
10
0
Normalized Reset Threshold vs. Temperature
1.006
Normalized Reset Threshold
1.004
1.002
1.000
0.998
0.996
0.994
-50
-25
0
25
50
Temperature (℃)
75
100
0
200
400
600
800
1000
Reset Threshold Overdrive (mV)
SG Micro Corp
www.sg-micro.com
5
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