SGM811/SGM812
Microprocessor Supervisory
with Manual Reset Input
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 1.8V, 2.5V, 3V,
3.3V and 5V 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 240ms. This holds the
microprocessor in a reset state until conditions have
stabilized. The
RESET
output remains operational with
V
CC
as low as 1V. The SGM811 provides an active low
reset signal (
RESET
) while the SGM812 provides an
active high signal (RESET) output.
GND
1
FEATURES
●
Superior Upgrade for MAX811/MAX812 and
ADM811/ADM812
●
Specified Over Temperature
●
Low Power Consumption (13μA TYP)
●
Precision Voltage Monitor: 1.8V, 2.5V, 3V, 3.3V
and 5V Options
●
Reset Assertion Down to 1V V
CC
●
150ms Min Power-On Reset
Logic Low
RESET
Output (SGM811)
Logic High RESET Output (SGM812)
●
Manual Reset Input
●
Green SOT-143 and SOT-23-5 Packages
PIN CONFIGURATIONS
(TOP VIEW)
SOT-143
4
V
CC
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
SOT-143 and SOT-23-5 packages.
GND
NC
RESET/RESET
1
2
3
4
MR
SOT-23-5
5
V
CC
RESET/RESET
2
3
MR
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
MR
GND
100kΩ
TYPICAL OPERATION CIRCUIT
V
CC
V
CC
MICROPROCESSOR
SYSTEM
RESET
GND
SGM811
RESET
SG Micro Corp
www.sg-micro.com
REV. B. 4
SGM811/812
PACKAGE/ORDERING INFORMATION
ORDERING
NUMBER
SGM811-LXN5/TR
SGM811-MXN5/TR
SGM811-JXN5/TR
SGM811-TXN5/TR
SGM811-SXN5/TR
SGM811-RXN5/TR
SGM811-ZXN5/TR
SGM811-LXKA4/TR
SGM811-MXKA4/TR
SGM811-JXKA4/TR
SGM811-TXKA4/TR
SGM811-SXKA4/TR
SGM811-RXKA4/TR
SGM811-ZXKA4/TR
SGM811-XXKA4/TR
SGM812-LXN5/TR
SGM812-M XN5/TR
SGM812-JXN5/TR
SGM812-TXN5/TR
SGM812-SXN5/TR
SGM812-RXN5/TR
SGM812-ZXN5/TR
SGM812-LXKA4/TR
SGM812-MXKA4/TR
SGM812-JXKA4/TR
SGM812-TXKA4/TR
SGM812-SXKA4/TR
SGM812-RXKA4/TR
SGM812-ZXKA4/TR
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
1.63
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
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
Microprocessor Supervisory
with Manual Reset Input
SPECIFIED
TEMPERATURE
RANGE
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃
TO
+125℃
PACKAGE
MARKING
811L
811M
811J
811T
811S
811R
811Z
811L
811M
811J
811T
811S
811R
811Z
811X
812L
812M
812J
812T
812S
812R
812Z
812L
812M
812J
812T
812S
812R
812Z
PACKING
OPTION
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
Tape and Reel, 3000
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
SG Micro Corp
www.sg-micro.com
2
SGM811/812
ELECTRICAL CHARACTERISTICS
Microprocessor Supervisory
with Manual Reset Input
(V
CC
TYP = 5V for L/M/J Models, 3.3V for T/S Models, 3V for R Models, 2.5V for Z Models, 1.8V for X Models; unless otherwise
noted.)
PARAMETER
SUPPLY
Voltage
T
A
= 0℃ to +70℃
T
A
= -40℃ to +125℃
V
CC
< 5.5V, SGM81_L/M/J, T
A
= +25℃
Current
V
CC
< 5.5V, SGM81_L/M/J, T
A
= -40℃ to +125℃
V
CC
< 3.6V, SGM81_R/S/T/Z/X, T
A
= +25℃
V
CC
< 3.6V, SGM81_R/S/T/Z/X, T
A
= -40℃ to +125℃
RESET VOLTAGE THRESHOLD
SGM81_L
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
T
A
= +25℃
T
A
= -40℃ to +125℃
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
1.589
1.55
30
V
CC
= V
TH
to (V
TH
- 100mV)
T
A
= -40℃ to +85℃
T
A
= -40℃ to +125℃
150
100
20
240
560
840
1.63
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
1.671
1.71
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
μs
ms
ms
13
1.0
1.2
17
5.5
5.5
30
50
25
45
V
V
μA
μA
μA
μA
CONDITIONS
MIN
TYP
MAX
UNITS
SGM81_M
SGM81_J
SGM81_T
SGM81_S
SGM81_R
SGM81_Z
SGM811X
Reset Threshold Temperature Coefficient
V
CC
to RESET/
RESET
Delay
Reset Active Timeout Period
MANUAL RESET
Minimum Pulse Width
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
10
100
0.5
1
μs
ns
μs
MΩ
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/X
V
CC
> V
TH(MAX)
, SGM81_R/S/T/Z/X
2.3
0.8
0.7 × V
CC
0.25 × V
CC
V
V
V
V
SG Micro Corp
www.sg-micro.com
3
SGM811/812
ELECTRICAL CHARACTERISTICS
Microprocessor Supervisory
with Manual Reset Input
(V
CC
TYP = 5V for L/M/J Models, 3.3V for T/S Models, 3V for R Models, 2.5V for Z Models, 1.8V for X Models; unless otherwise
noted.)
PARAMETER
RESET/
RESET
OUTPUT VOLTAGE
Low (SGM811R/S/T/Z/X)
Low (SGM811L/M/J)
Low (SGM811R/S/T/Z/X/L/M/J)
High (SGM811R/S/T/Z/X)
High (SGM811L/M/J)
Low (SGM812R/S/T/Z/X)
Low (SGM812L/M/J)
High (SGM812 R/S/T/Z/X/L/M/J)
V
CC
= V
TH(MIN)
, I
SINK
= 1.2mA
V
CC
= V
TH(MIN)
, I
SINK
= 3.2mA
V
CC
> 1.0V, I
SINK
= 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
SG Micro Corp
www.sg-micro.com
4
SGM811/812
ABSOLUTE MAXIMUM RATINGS
(Typical values are at T
A
= +25°C, unless otherwise noted.)
Terminal Voltage (With Respect to Ground)
V
CC
.............................................................................-0.3V to 6V
All Other Inputs.............................................-0.3V to V
CC
+ 0.3V
Input Current
V
CC
,
MR
.............................................................................20mA
Output Current
RESET,
RESET
.................................................................20mA
Power Dissipation, P
D
@ T
A
= +25℃
SOT-23-5.............................................................................0.4W
SOT-143........................................................................... 0.32W
Microprocessor Supervisory
with Manual Reset Input
Operating Temperature Range.........................-40℃ to +125℃
Junction Temperature.......................................................150℃
Storage Temperature........................................-65℃ to +150℃
Lead Temperature (Soldering, 10s)...................................260℃
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.
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.
PIN DESCRIPTION
PIN NUMBER
FUNCTION
NAME
SGM811
SGM812
SOT-143 SOT-23-5 SOT-143 SOT-23-5
GND
1
1
1
1
Ground
NC
2
2
No Connect.
Active Low Logic Output.
RESET
remains low while V
CC
is below
2
3
—
—
the reset threshold or when
MR
is low;
RESET
then remains low
RESET
for at least 150ms 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
RESET
—
—
2
3
remains high for 240ms (typical) after V
CC
rises above the reset
threshold.
Manual Reset. This active low debounced input will ignore input
3
4
3
4
pulses of 100ns or less (typical) and is guaranteed to accept input
MR
pulses of greater than 10μs. Leave floating when not used.
V
CC
4
5
4
5
Power supply voltage that is monitored.
SG Micro Corp
www.sg-micro.com
5
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