SGM811
SGM812
GENERAL DESCRIPTION
The SGM811/SGM812 supervisory circuits monitor the
power supply voltage in microprocessor and digital
systems. The SGM811/SGM812 is designed to monitor
seven different voltages, these voltages have been selected
for the effective monitoring of 2.5V, 3 V, 3.3 V, and 5 V
supply voltage levels.
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 SGM811 provides an active low reset
signal (
RESET
) while the SGM812 provides an active high
signal (RESET) output.
The SGM811/SGM812 has a manual reset input. The
manual reset function is very useful, especially if the circuit
in which the SGM811/SGM812 is operating enters into a
state that can only be detected by the user. Allowing the
user to reset a system manually can reduce the damage or
danger that could otherwise be caused by an out-of-control
or locked system. The devices come in a 4-pin SOT143
and 5-pin SOT23 packages.
Microprocessor Supervisory
with Manual Reset Input
FEATURES
−
Superior Upgrade for MAX811/MAX812 and
ADM811/ADM812
−
Specified over Temperature
−
Low Power Consumption (17
μA
Typ)
−
Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V
Options
−
Reset Assertion Down to 1 V V
CC
−
160 ms Min Power-On Reset
Logic Low
RESET
Output (SGM811)
Logic High RESET Output (SGM812)
−
Manual Reset Input
−
Compact 4-Pin SOT143 and 5-Pin SOT23 Packages
PIN CONFIGURATIONS（TOP VIEW）
SOT143-4
GND
1
4
V
CC
RESET/RESET
2
3
MR
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
SOT23-5
GND
NC
RESET/RESET
1
2
3
4
MR
5
V
CC
TYPICAL OPERATION CIRCUIT
V
CC
V
CC
MICROPROCESSOR
SYSTEM
RESET
100KO
GND
GND
SGM811
RESET
MR
Shengbang Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
Nov 2006
ORDERING INFORMATION
ORDERING
NUMBER
SGM811-LXN5
SGM811-M XN5
SGM811-JXN5
SGM811-T XN5
SGM811-S XN5
SGM811-R XN5
SGM811-Z XN5
SGM811-LXKA4
SGM811-MX KA4
SGM811-JX KA4
SGM811-TX KA4
SGM811-SX KA4
SGM811-RX KA4
SGM811-Z X KA4
SGM812-LXN5
SGM812-M XN5
SGM812-JXN5
SGM812-T XN5
SGM812-S XN5
SGM812-R XN5
SGM812-Z XN5
SGM812-LX KA4
SGM812-MX KA4
SGM812-JX KA4
SGM812-TX KA4
SGM812-SX KA4
SGM812-RX KA4
SGM812-Z X KA4
RESET
THRESHOLD
(V)
4.63
4.38
4.00
3.08
2.93
2.63
2.32
4.63
4.38
4.00
3.08
2.93
2.63
2.32
4.63
4.38
4.00
3.08
2.93
2.63
2.32
4.63
4.38
4.00
3.08
2.93
2.63
2.32
PECKAGE
TYPE
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
811L
811M
811J
811T
811S
811R
811Z
811L
811M
811J
811T
811S
811R
811Z
812L
812M
812J
812T
812S
812R
812Z
812L
812M
812J
812T
812S
812R
812Z
PACKAGE
OPTION
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
SOT143-4
- 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
- 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
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
SGM811/812
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
Voltage
T
A
= 0°C to 70°C
T
A
= - 40°C to +125°C
V
CC
< 5.5 V, SGM81_L/M/J, T
A
= 25°C
Current
V
CC
< 5.5 V, SGM81_L/M/J, T
A
= - 40°C to +125°C
V
CC
< 3.6 V, SGM81_R/S/T/Z, T
A
= 25°C
V
CC
< 3.6 V, SGM81_R/S/T/Z, T
A
= - 40°C to +125°C
RESET VOLTAGE THRESHOLD
SGM81_L
SGM81_M
SGM81_J
SGM81_T
SGM81_S
SGM81_R
SGM81_Z
RESET THRESHOLD
Temperature Coefficient
V
CC
to RESET/
RESET
Delay
Reset Active Timeout Period
T
A
= - 40°C to +125°C
MANUAL RESET
100
840
ms
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
T
A
= - 40°C to +125°C
T
A
= 25°C
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
CONDITIONS
MIN
1.0
1.2
TYP
MAX
5.5
5.5
UNITS
V
V
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
µs
20
17
30
50
25
45
4.63
4.38
4.00
3.08
2.93
2.63
2. 23
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
30
V
CC
= V
TH
to (V
TH
–100 mV)
T
A
=
- 40°C to +85°C
160
20
240
560
ms
Minimum Pulsewidth
Glitch Immunity
RESET/
RESET
Propagation
Delay
Pull-Up Resistance
The Manual Reset Circuit Will Act On:
An Input Rising Above
An Input Falling Below
An Input Rising Above
An Input Falling Below
V
CC
> V
TH(MAX)
, SGM81_L/M/J
V
CC
> V
TH(MAX)
, SGM81_L/M/J
V
CC
> V
TH(MAX)
, SGM81_R/S/T/Z
V
CC
> V
TH(MAX)
, SGM81_R/S/T/Z
10
µs
100
0.5
1
2.3
0.8
0.7×V
CC
0.25×V
CC
ns
µs
MΩ
V
V
V
V
3
SGM811/812
ELECTRICAL CHARACTERISTICS
(continued)
(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
RESET/
RESET
OUTPUT VOLTAGE
Low (SGM811R/S/T/Z)
Low (SGM811L/M/J)
Low (SGM811R/S/T/Z/L/M/J)
High (SGM811R/S/T/Z)
High (SGM811L/M/J)
Low (SGM812R/S/T/Z)
Low (SGM812L/M/J)
High (SGM812 R/S/T/Z/L/M/J)
V
CC
= V
TH(MIN)
, I
SINK
= 1.2mA
V
CC
= V
TH(MIN)
, I
SINK
= 3.2mA
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
0.8×V
CC
0.8×V
CC
V
CC
– 1.5
0.3
0.4
0.3
0.4
0.3
V
V
V
V
V
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
(Typical values are at T
A
= 25°C, unless otherwise noted.)
Terminal Voltage (With Respect to Ground)
V
CC
................................................................................–0.3 V to +6 V
All Other Inputs ............................................ –0.3 V to V
CC
+ 0.3 V
Input Current
V
CC
,
MR
................................................................................ 20 mA
Output Current
RESET,
RESET
..................................................................... 20 mA
Power Dissipation, P
D
@ T
A
= 25℃
SOT23-5 .....................................................................................0.4W
SOT143-4.................................................................................. 0.32W
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
Pin Number
NAME
SGM811
SOT143-4 SOT23-5
GND
1
1
2
2
3
—
SGM812
SOT143-4
1
Ground
No connect.
Active Low Logic Output.
RESET
remains low while V
CC
is below the reset
threshold or when
MR
is low;
RESET
then remains low for at least 160 ms after
V
CC
rises above the reset threshold.
Active High Logic Output. RESET remains high while V
CC
is below the reset
threshold or when
MR
is low; RESET then remains high for 240 ms (typical) after
V
CC
rises above the reset threshold.
Manual Reset. This active low debounced input will ignore input pulses of 100 ns or
less (typical) and is guaranteed to accept input pulses of greater than 10 µs. Leave
floating when not used.
Power supply voltage that is monitored.
4
FUNCTION
NC
RESET
RESET
—
—
2
MR
V
CC
3
4
4
5
3
4
SGM811/812
TYPICAL PERFORMANCE CHARACTERISTICS
Power-Down RESET Delay vs.Temperature
250
SGM811L/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
SGM811T/S/R
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(℃)
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
SGM811S
Supply Current vs. Temperature (No Load)
30
25
V
CC
= 5.5V
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
SGM811T/S/R
SGM811L/M/J
1.008
Temperature(℃)
５
RESET Comparator Overdrive
,
V
TH
- V
CC
(mV)
SGM811/812
电子工程世界
