SGM803
SGM809
SGM810
GENERAL DESCRIPTION
The SGM803/SGM809/SGM810 supervisory circuits
monitor the power supply voltage in microprocessor and
digital systems. They provide a reset output during
power-up, power-down and brownout conditions. On
power-up, an internal timer holds reset asserted for 240 ms.
This holds the microprocessor in a reset state until
conditions have stabilized. The
RESET
output remains
operational with V
CC
as low as 1 V. The SGM803/SGM809
provides an active low reset signal (
RESET
) while the
SGM810 provides an active high signal (RESET) output.
The SGM809/SGM810 have push-pull outputs, whereas the
SGM803 has an open-drain output, which requires an
external pull-up resistor.
Seven reset threshold voltage options are available suitable
for monitoring 2.5V, 3V, 3.3V, and 5V supply voltages.
The reset comparator features built-in glitch immunity,
making it immune to fast transients on V
CC
.
The low supply current of typically 17
µ
A makes the
SGM803/SGM809/SGM810 ideal for use in portable, battery
operated equipment. They are available in the 3-pin SOT23
package.
Microprocessor Supervisory
Circuit in 3-Pin SOT23
FEATURES
−
Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V
Options
−
Superior Upgrade for MAX803/MAX809/MAX810
and SGM803/SGM809/SGM810
−
Fully Specified over Temperature
−
Low Power Consumption (17μA Typ)
−
Reset Assertion Down to 1 V V
CC
−
160 ms Min Power-On Reset
Open-Drain
RESET
Output(SGM803)
Push-Pull
RESET
Output (SGM809)
Push-Pull RESET Output (SGM810)
−
Compact 3-Pin SOT23 Package
PIN CONFIGURATIONS（TOP VIEW）
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
GND
1
SGM803
SGM809
SGM810
RESET/RESET
2
3
V
CC
SOT23-3
TYPICAL OPERATION CIRCUIT
RESET
V
CC
V
CC
R
PULL-UP
SGM803 only
1
SGM803/SGM809
RESET
MICROPROCESSOR
SYSTEM
RESET
SGM809-
ZXN3L
(only)
GND
2
3
V
CC
SOT23-3(L-Type)
GND
GND
Shengbang Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
REV. B
ORDERING INFORMATION
MODEL
RESET
THRESHOLD
(V)
4.63
4.38
3.08
2.93
2.63
2.32
4.63
4.38
4.00
SGM809
3.08
2.93
2.63
2.32
2.32
4.63
4.38
4.00
SGM810
3.08
2.93
2.63
2.32
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
SGM803-LXN3
SGM803-MXN3
SGM803-TXN3
SGM803-SXN3
SGM803-RXN3
SGM803-ZXN3
SGM809-LXN3
SGM809-MXN3
SGM809-JXN3
SGM809-TXN3
SGM809-SXN3
SGM809-RXN3
SGM809-ZXN3
SGM809-ZXN3L
SGM810-LXN3
SGM810-MXN3
SGM810-JXN3
SGM810-TXN3
SGM810-SXN3
SGM810-RXN3
SGM810-ZXN3
PACKAGE
MARKING
803L
803M
803T
803S
803R
803Z
809L
809M
809J
809T
809S
809R
809Z
809ZL
810L
810M
810J
810T
810S
810R
810Z
PACKAGE
OPTION
SGM803
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
2
SGM803/809/810
ABSOLUTE MAXIMUM RATINGS
(Typical values are at T
A
= 25°C, unless otherwise noted.)
V
CC
................................................................................–0.3 V to +6 V
RESET,
RESET
...............................................–0.3 V to V
CC
+0.3 V
Input Current , V
CC
.................................................................20 mA
Output Current, RESET,
RESET
......................................... 20 mA
Rate of Rise, V
CC
.................................................................100 V/µs
Power Dissipation, P
D
@ T
A
= 25℃
SOT23-3 .....................................................................................0.4W
Package Thermal Resistance
SOT23-3,
θ
JA
....................................................................... 250℃/W
Operating Temperature Range...........................- 40°C to +125°C
Junction Temperature...........................................................+150°C
Storage Temperature.............................................- 65°C to +150°C
Lead Temperature (soldering, 10s).....................................+260°C
ESD Susceptibility
HBM..........................................................................................4000V
MM..............................................................................................400V
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.
PIN DESCRIPTION
NAME
GND
SGM803
1
2
Pin Number
SGM809-
SGM809
ZXN3L
1
2
2
1
SGM810
1
—
Ground
Active Low reset.
RESET
remains low while V
CC
is below the reset
threshold, and remains low for 240 ms (typ) after V
CC
rises above the
reset threshold.
Active High reset. RESET remains high while V
CC
is below the reset
RESET
—
—
—
2
threshold, and remains high for 240 ms (typ) after V
CC
rises above the
reset threshold.
V
CC
3
3
3
3
Power supply voltage that is monitored.
FUNCTION
RESET
3
SGM803/809/810
ELECTRICAL CHARACTERISTICS
(V
CC
Typ = 5 V for L/M/J Models, 3.3 V for T/S Models, 3 V for R Models, 2.5 V for Z Models; unless otherwise noted.)
PARAMETER
SUPPLY
T
A
= 0°C to 70°C
Voltage
T
A
= - 40°C to +125°C
V
CC
< 5.5 V, SGM8_L/M/J, T
A
= 25°C
V
CC
< 5.5 V, SGM8_L/M/J, T
A
= - 40°C to +125°C
Current
V
CC
< 3.6 V, SGM8_R/S/T/Z, T
A
= 25°C
V
CC
< 3.6 V, SGM8_R/S/T/Z, T
A
= - 40°C to +125°C
RESET VOLTAGE THRESHOLD
T
A
= 25°C
SGM8_L
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM8_M
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM809J/SGM810J
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM8_T
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM8_S
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM8_R
T
A
= - 40°C to +125°C
T
A
= 25°C
SGM8_Z
RESET THRESHOLD
Temperature Coefficient
V
CC
to RESET/
RESET
Delay
Reset Active Timeout Period
V
CC
= V
TH
to (V
TH
–100 mV)
T
A
=
- 40°C to +85°C
160
100
T
A
= - 40°C to +125°C
4.537
4.40
4.292
4.16
3.92
3.8
3.003
2.92
2.857
2.78
2.564
2.50
2.262
2.22
30
20
240
560
840
2.32
2.63
2.93
3.08
4.00
4.38
4.63
4.723
4.86
4.468
4.56
4.08
4.2
3.157
3.23
3.003
3.08
2.696
2.76
2.378
2.42
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
µs
ms
ms
17
1.0
1.2
20
5.5
5.5
30
50
25
45
V
V
µA
µA
µA
µA
CONDITIONS
MIN
TYP
MAX
UNITS
T
A
= - 40°C to +125°C
RESET/
RESET
OUTPUT VOLTAGE
Low (SGM803R/S/T/Z)
Low (SGM809R/S/T/Z)
Low (SGM803L/M/J)
Low (SGM809L/M/J)
Low (SGM803R/S/T/L/M/J/Z)
Low (SGM809R/S/T/L/M/J/Z)
High (SGM809R/S/T/Z)
High (SGM809L/M/J)
Low (SGM810R/S/T/Z)
Low (SGM810L/M/J)
High (SGM810 R/S/T/L/M/J)
V
CC
= V
TH(MIN)
, I
SINK
= 1.2mA
0.3
V
V
CC
= V
TH(MIN)
, I
SINK
= 3.2mA
0.4
V
V
CC
> 1.0 V, I
SIN
K = 50µA
V
CC
> V
TH(MAX)
, I
SOURCE
= 500µA
V
CC
> V
TH(MAX)
, I
SOURCE
= 800µA
V
CC
= V
TH(MAX)
, I
SINK
= 1.2mA
V
CC
= V
TH(MAX)
, I
SINK
= 3.2mA
1.8 V < V
CC
< V
TH(MIN)
, I
SOURCE
= 150µA
V
CC
> V
TH
, reset de-asserted
0.8×V
CC
0.8×V
CC
V
CC
– 1.5
0.3
V
V
V
0.3
0.4
V
V
V
RESET
Open-Drain Output
Leakage Current (SGM803)
1
µA
Specifications subject to change without notice.
４
SGM803/809/810
TYPICAL PERFORMANCE CHARACTERISTICS
Power-Down RESET Delay vs.Temperature
250
SGM8_L/M/J
V
OD
= V
TH
- V
CC
V
OD
= 10mV
150
100
50
0
-50 -30 -10
10
30
50
70
90
110 130
V
OD
= 100mV
V
OD
= 200mV
V
OD
= 20mV
Power-Down RESET Delay vs.Temperature
300
SGM8_T/S/R/Z
V
OD
= V
TH
- V
CC
V
OD
= 10mV
Power-Down RESET (µS)
200
Power-Down RESET (µS)
250
200
150
100
50
0
-50 -30 -10
V
OD
= 20mV
V
OD
= 100mV
V
OD
= 200mV
10
30
50
70
90
110 130
Temperature(℃)
Temperature(℃)
Supply Current vs. Temperature (No Load)
30
25
V
CC
= 5.5V
Power-Up RESET Delay vs.Temperature
264
262
260
258
256
254
252
250
248
-50 -30 -10
10
30
50
70
90
110 130
SGM809S
Power-Down RESET (mS)
Supply Current (µA)
20
15
10
5
0
-50 -30 -10
10
30
50
70
V
CC
= 3.6V
90
110 130
Temperature(℃)
Temperature(℃)
Normalized RESET Voltage Threshold vs.
Temperature
Normalized RESET Threshold
1.006
1.004
1.002
1
0.998
0.996
0.994
0.992
0.99
0.988
-50 -30 -10
10
30
50
70
90
110 130
Maximum Transient Duration Without Causing a
Reset Pulse vs. RESET Comparator Overdrive
Maximum Transient Duration (µS)
400
350
300
250
200
150
100
50
0
1
10
100
1000
SGM8_R/S/T/Z
SGM8_L/M/J
1.008
Temperature(℃)
RESET Comparator Overdrive
,
V
TH
- V
CC
(mV)
５
SGM803/809/810
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