SGM802
Low-Power, SC70/SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
GENERAL DESCRIPTION
The SGM802 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 SGM802 has an active-high, push-pull reset output.
It is available in Green SC70-4 (R) and SOT-143
packages. The SGM802 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)
Push-Pull RESET Output Option
Guaranteed RESET Valid to V
CC
= 1V
Immune to Short V
CC
Transients
Available in Green SC70-4 (R) and SOT-143
Packages
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
SGM802
RESET
GND
RESET
GND
SG Micro Corp
www.sg-micro.com
REV. A. 2
SGM802
Low-Power, SC70/SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
PACKAGE/ORDERING INFORMATION
MODEL
PIN-PACKAGE
RESET
THRESHOLD (TYP)
1.63V
2.32V
SOT-143
2.63V
2.93V
SGM802
1.63V
2.32V
SC70-4 (R)
2.63V
2.93V
NOTE:
XX
= Date Code.
Green (RoHS & HSF):
SG Micro Corp defines "Green" to mean
Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact
your SGMICRO representative directly.
SGM802-2.63YC4G/TR
SGM802-2.93YC4G/TR
S7FXX
S80XX
Tape and Reel, 3000
Tape and Reel, 3000
SGM802-1.63YC4G/TR
SGM802-2.32YC4G/TR
S7DXX
S7EXX
Tape and Reel, 3000
Tape and Reel, 3000
SGM802-2.63YKA4G/TR
SGM802-2.93YKA4G/TR
S7AXX
S7BXX
Tape and Reel, 3000
Tape and Reel, 3000
ORDERING
NUMBER
SGM802-1.63YKA4G/TR
SGM802-2.32YKA4G/TR
PACKAGE
MARKING
S78XX
S79XX
PACKING
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
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: S78BA (2011, January)
ABSOLUTE MAXIMUM RATINGS
All Voltages Referenced to GND
V
CC
.............................................................................-0.3V to 6V
SRT, RESET (Push-Pull)............................-0.3V to (V
CC
+ 0.3V)
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.
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.
SG Micro Corp
www.sg-micro.com
2
SGM802
Low-Power, SC70/SOT µP Reset Circuit with
Capacitor-Adjustable Reset Timeout Delay
PIN CONFIGURATIONS
(TOP VIEW)
SGM802
GND
4
RESET
V
CC
1
SGM802
4
RESET
1
V
CC
2
3
SRT
GND
2
3
SC70-4 (R)
SRT
SOT-143
PIN DESCRIPTION
PIN
NAME
SOT-143
1
2
SC70-4 (R)
2
1
GND
V
CC
Ground.
Supply Voltage and Reset Threshold Monitor Input.
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.
RESET changes from low to high whenever V
CC
drops below the selected
reset threshold voltage. RESET remains high for the reset timeout period
after V
CC
exceeds the reset threshold.
FUNCTION
3
3
SRT
4
4
RESET
SG Micro Corp
www.sg-micro.com
3
SGM802
Low-Power, SC70/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
V
TH
V
HYST
t
RD
t
RP
I
RAMP
V
TH-RAMP
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
SOURCE
= 1µA
RESET Output Voltage High
V
OH
V
CC
≥
1.8V, I
SOURCE
= 150µA
V
CC
≥
2.7V, I
SOURCE
= 500µA
V
CC
≥
4.5V, I
SOURCE
= 800µA
V
CC
≥
1.8V, I
SINK
= 500µA
RESET Output Voltage Low
V
OL
V
CC
≥
2.7V, I
SINK
= 1.2mA
V
CC
≥
4.5V, I
SINK
= 3.2mA
0.8 × V
CC
0.8 × V
CC
0.8 × V
CC
0.8 × V
CC
0.3
0.3
0.4
V
V
3.00
T
A
= +25℃
T
A
= -40℃ to +85℃
V
TH
- 2.5%
V
TH
- 3.5%
4 × V
TH
80
4.25
0.34
210
0.6
5.75
CONDITIONS
MIN
1.0
3.9
3.4
3.0
TYP
MAX
5.5
7.0
5.5
4.8
V
TH
+ 2.5%
V
TH
+ 3.5%
V
mV
µs
ms
nA
V
μA
UNITS
V
SG Micro Corp
www.sg-micro.com
4
SGM802
Low-Power, SC70/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
6
Supply Current (μA)
5
4
3
2
1
0
0
1
2
3
4
5
6
Supply Voltage (V)
V
TH
= 1.63V
+85℃
+25℃
-40℃
10000
Reset Timeout Period (ms)
1000
100
10
1
0.1
0.01
Reset Timeout Period vs. C
SRT
0.1
1
10
100
1000
C
SRT
(nF)
Reset Timeout Period vs. Temperature
500
460
420
380
340
300
-50
-25
0
25
50
75
100
Temperature (℃)
Reset Timeout Period (ms)
Reset Timeout Period (μs)
C
SRT
= 0
4.6
Reset Timeout Period vs. Temperature
C
SRT
= 1500pF
4.5
4.4
4.3
4.2
4.1
-50
-25
0
25
50
75
100
Temperature (℃)
Normalized Reset Threshold vs. Temperature
1.006
Normalized Reset Threshold
Transient Duration (µs)
70
Maximum Transient Duration vs. Reset
Threshold Overdrive
V
TH
= 2.93V
1.004
1.002
1.000
0.998
0.996
0.994
-50
-25
0
25
50
Temperature (℃)
75
100
60
50
40
30
20
10
0
200
400
600
800
Reset Threshold Overdrive (mV)
1000
SG Micro Corp
www.sg-micro.com
5
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
