SGM811/SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
GENERAL DESCRIPTION
FEATURES
The SGM811/SGM812 supervisory circuits monitor the
● Superior Upgrade for MAX811/MAX812 and
power supply voltage in microprocessor and digital
ADM811/ADM812
systems. The SGM811/SGM812 are designed to
● Full Specified over Temperature
monitor eight different voltages; these voltages have
● Low Power Consumption: 13μA (TYP)
been selected for the effective monitoring of 1.8V, 2.5V,
● Precision Voltage Monitor: 1.8V, 2.5V, 3V, 3.3V
and 5V Options
3V, 3.3V and 5V supply voltage levels.
They provide a reset output during power-up, powerdown 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 nRESET
output
remains operational with VCC as low as 1V. The
● Reset Assertion Down to 1V VCC
● 150ms (MIN) Power-On Reset
Logic Low nRESET Output (SGM811)
Logic High RESET Output (SGM812)
● Manual Reset Input
● Available in Green SOT-143 and SOT-23-5 Packages
SGM811 provides an active low reset signal (nRESET)
while the SGM812 provides an active high signal
(RESET) output.
Included in this circuit is 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
APPLICATIONS
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
caused by an out-of-control or locked system. The
devices come in SOT-143 and SOT-23-5 packages.
TYPICAL APPLICATION
VCC
VCC
Microprocessor
System
SGM811
nMR
SG Micro Corp
www.sg-micro.com
nRESET
GND
100kΩ
nRESET
GND
JANUARY 2015 – REV. B. 4
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
PACKAGE/ORDERING INFORMATION
ORDERING
NUMBER
RESET
THRESHOLD
(V)
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
PACKING
OPTION
SGM811-LXN5/TR
4.63
SOT-23-5
-40℃ to +125℃
811L
Tape and Reel, 3000
SGM811-MXN5/TR
4.38
SOT-23-5
-40℃ to +125℃
811M
Tape and Reel, 3000
SGM811-JXN5/TR
4.00
SOT-23-5
-40℃ to +125℃
811J
Tape and Reel, 3000
SGM811-TXN5/TR
3.08
SOT-23-5
-40℃ to +125℃
811T
Tape and Reel, 3000
SGM811-SXN5/TR
2.93
SOT-23-5
-40℃ to +125℃
811S
Tape and Reel, 3000
SGM811-RXN5/TR
2.63
SOT-23-5
-40℃ to +125℃
811R
Tape and Reel, 3000
SGM811-ZXN5/TR
2.32
SOT-23-5
-40℃ to +125℃
811Z
Tape and Reel, 3000
SGM811-LXKA4/TR
4.63
SOT-143
-40℃ to +125℃
811L
Tape and Reel, 3000
SGM811-MXKA4/TR
4.38
SOT-143
-40℃ to +125℃
811M
Tape and Reel, 3000
SGM811-JXKA4/TR
4.00
SOT-143
-40℃ to +125℃
811J
Tape and Reel, 3000
SGM811-TXKA4/TR
3.08
SOT-143
-40℃ to +125℃
811T
Tape and Reel, 3000
SGM811-SXKA4/TR
2.93
SOT-143
-40℃ to +125℃
811S
Tape and Reel, 3000
SGM811-RXKA4/TR
2.63
SOT-143
-40℃ to +125℃
811R
Tape and Reel, 3000
SGM811-ZXKA4/TR
2.32
SOT-143
-40℃ to +125℃
811Z
Tape and Reel, 3000
SGM811-XXKA4/TR
1.63
SOT-143
-40℃
TO +125℃
811X
Tape and Reel, 3000
SGM812-LXN5/TR
4.63
SOT-23-5
-40℃ to +125℃
812L
Tape and Reel, 3000
SGM812-MXN5/TR
4.38
SOT-23-5
-40℃ to +125℃
812M
Tape and Reel, 3000
SGM812-JXN5/TR
4.00
SOT-23-5
-40℃ to +125℃
812J
Tape and Reel, 3000
SGM812-TXN5/TR
3.08
SOT-23-5
-40℃ to +125℃
812T
Tape and Reel, 3000
SGM812-SXN5/TR
2.93
SOT-23-5
-40℃ to +125℃
812S
Tape and Reel, 3000
SGM812-RXN5/TR
2.63
SOT-23-5
-40℃ to +125℃
812R
Tape and Reel, 3000
SGM812-ZXN5/TR
2.32
SOT-23-5
-40℃ to +125℃
812Z
Tape and Reel, 3000
SGM812-LXKA4/TR
4.63
SOT-143
-40℃ to +125℃
812L
Tape and Reel, 3000
SGM812-MXKA4/TR
4.38
SOT-143
-40℃ to +125℃
812M
Tape and Reel, 3000
SGM812-JXKA4/TR
4.00
SOT-143
-40℃ to +125℃
812J
Tape and Reel, 3000
SGM812-TXKA4/TR
3.08
SOT-143
-40℃ to +125℃
812T
Tape and Reel, 3000
SGM812-SXKA4/TR
2.93
SOT-143
-40℃ to +125℃
812S
Tape and Reel, 3000
SGM812-RXKA4/TR
2.63
SOT-143
-40℃ to +125℃
812R
Tape and Reel, 3000
SGM812-ZXKA4/TR
2.32
SOT-143
-40℃ to +125℃
812Z
Tape and Reel, 3000
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.
SG Micro Corp
www.sg-micro.com
JANUARY 2015
2
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
ABSOLUTE MAXIMUM RATINGS
(Typical values are at TA = +25℃, unless otherwise noted.)
Terminal Voltage (With Respect to Ground)
VCC ....................................................................... -0.3V to 6V
All Other Inputs ........................................-0.3V to VCC + 0.3V
Input Current
VCC, nMR ...................................................................... 20mA
Output Current
RESET, nRESET .......................................................... 20mA
Power Dissipation, PD @ TA = +25℃
SOT-23-5 ....................................................................... 0.4W
SOT-143 ...................................................................... 0.32W
Operating Temperature Range .................... -40℃ to +125℃
Junction Temperature .................................................+150℃
Storage Temperature Range ....................... -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................+260℃
ESD Susceptibility
HBM ............................................................................. 4000V
MM ................................................................................. 400V
OVERSTRESS CAUTION
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
ESD SENSITIVITY 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.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
PIN CONFIGURATIONS
SGM811/2 (TOP VIEW)
GND
nRESET/RESET
4
1
3
2
SGM811/2 (TOP VIEW)
VCC
nMR
SOT-143
GND
1
NC
2
nRESET/RESET
3
5
VCC
4
nMR
SOT-23-5
PIN DESCRIPTION
PIN NUMBER
NAME
SGM811
SGM812
FUNCTION
SOT-143 SOT-23-5 SOT-143 SOT-23-5
GND
1
1
1
1
Ground
NC
—
2
—
2
nRESET
2
3
—
—
RESET
—
—
2
3
nMR
3
4
3
4
VCC
4
5
4
5
No Connect.
Active Low Logic Output. nRESET remains low while VCC is below the
reset threshold or when nMR is low; nRESET then remains low for at
least 150ms after VCC rises above the reset threshold.
Active High Logic Output. RESET remains high while VCC is below the
reset threshold or when nMR is low; RESET then remains high for 240ms
(TYP) after VCC rises above the reset threshold.
Manual Reset Input Pin. This active low debounced input will ignore input
pulses of 100ns or less (TYP) and is guaranteed to accept input pulses of
greater than 10μs. Leave floating when not used.
Power Supply Voltage. Power supply voltage that is monitored.
SG Micro Corp
www.sg-micro.com
JANUARY 2015
3
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
ELECTRICAL CHARACTERISTICS
(VCC = 5V for L/M/J Models, 3.3V for T/S Models, 3V for R Model, 2.5V for Z Model, 1.8V for X Model, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
SUPPLY
Voltage
TA = 0℃ to +70℃
1.0
TA = -40℃ to +125℃
1.2
5.5
V
30
μA
50
μA
25
μA
45
μA
4.63
4.723
V
4.86
V
4.38
4.468
V
4.56
V
17
VCC < 5.5V, SGM81_L/M/J, TA = +25℃
VCC < 5.5V, SGM81_L/M/J, TA = -40℃ to +125℃
Current
13
VCC < 3.6V, SGM81_R/S/T/Z/X, TA = +25℃
VCC < 3.6V, SGM81_R/S/T/Z/X,
TA = -40℃ to +125℃
RESET VOLTAGE THRESHOLD
SGM81_L
SGM81_M
SGM81_J
SGM81_T
SGM81_S
SGM81_R
SGM81_Z
SGM811-X
TA = +25℃
4.537
TA = -40℃ to +125℃
4.40
TA = +25℃
4.292
TA = -40℃ to +125℃
4.16
TA = +25℃
3.92
TA = -40℃ to +125℃
3.8
TA = +25℃
3.003
TA = -40℃ to +125℃
2.92
TA = +25℃
2.857
TA = -40℃ to +125℃
2.78
TA = +25℃
2.564
TA = -40℃ to +125℃
2.50
TA = +25℃
2.262
TA = -40℃ to +125℃
2.22
TA = +25℃
1.589
TA = -40℃ to +125℃
1.55
Reset Threshold Temperature
Coefficient
VCC to RESET/nRESET Delay
Reset Active Timeout Period
4.00
4.08
V
4.2
V
3.08
3.157
V
3.23
V
2.93
3.003
V
3.08
V
2.63
2.696
V
2.76
V
2.32
2.378
V
2.42
V
1.63
1.671
V
1.71
V
30
VCC = VTH to (VTH - 100mV)
ppm/°C
20
TA = -40℃ to +85℃
150
TA = -40℃ to +125℃
100
240
μs
560
ms
840
ms
MANUAL RESET
Minimum Pulse Width
10
μs
Glitch Immunity
100
RESET/nRESET Propagation Delay
0.5
μs
1
MΩ
Pull-Up Resistance
ns
The Manual Reset Circuit Will Act On:
An Input Rising Above
VCC > VTH(MAX), SGM81_L/M/J
An Input Falling Below
VCC > VTH(MAX), SGM81_L/M/J
An Input Rising Above
VCC > VTH(MAX), SGM81_R/S/T/Z/X
An Input Falling Below
VCC > VTH(MAX), SGM81_R/S/T/Z/X
SG Micro Corp
www.sg-micro.com
2.3
V
0.8
V
0.7 × VCC
V
0.25 × VCC
V
JANUARY 2015
4
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V for L/M/J Models, 3.3V for T/S Models, 3V for R Model, 2.5V for Z Model, 1.8V for X Model, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RESET/nRESET OUTPUT VOLTAGE
Low (SGM811-R/S/T/Z/X)
VCC = VTH(MIN), ISINK = 1.2mA
0.3
V
Low (SGM811-L/M/J)
VCC = VTH(MIN), ISINK = 3.2mA
0.4
V
Low (SGM811-R/S/T/Z/X/L/M/J)
VCC > 1.0V, ISINK = 50μA
0.3
V
High (SGM811-R/S/T/Z/X)
VCC > VTH(MAX), ISOURCE = 500μA
0.8 × VCC
High (SGM811-L/M/J)
VCC > VTH(MAX), ISOURCE = 800μA
VCC - 1.5
Low (SGM812-R/S/T/Z/X)
VCC = VTH(MAX), ISINK = 1.2mA
0.3
V
Low (SGM812-L/M/J)
VCC = VTH(MAX), ISINK = 3.2mA
0.4
V
High (SGM812-R/S/T/Z/X/L/M/J)
1.8 V < VCC < VTH(MIN), ISOURCE = 150μA
SG Micro Corp
www.sg-micro.com
0.8 × VCC
V
V
V
JANUARY 2015
5
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
TYPICAL PERFORMANCE CHARACTERISTICS
Power-Down Reset Delay vs. Temperature
VOD = VTH - VCC
SGM811L/M/J
200
VOD = 10mV
150
VOD = 20mV
100
VOD = 100mV
50
0
-50
-30
-10
Power-Down Reset Delay vs. Temperature
300
10
30
50
VOD = 200mV
70
90
Power-Down Reset (µs)
Power-Down Reset (µs)
250
250
VOD = 10mV
200
VOD = 20mV
150
100
0
-50
-30
-10
Power-Up Reset Delay vs. Temperature
Supply Current (μA)
Power-Up Reset (ms)
70
90
110 130
25
255
250
245
240
235
230
20
VCC = 5.5V
15
VCC = 3.6V
10
5
225
-50
-30
-10
10
30
50
70
90
0
110 130
-50
-30
-10
10
Temperature (℃)
1.008
1.004
1.002
1
0.998
0.996
0.994
0.992
0.99
-50
-30
-10
10
30
50
70
Temperature (℃)
SG Micro Corp
www.sg-micro.com
50
70
90
110 130
Maximum Transient Duration without Causing a Reset Pulse vs.
Reset Comparator Overdrive
400
Maximum Transient Duration (µs)
1.006
0.988
30
Temperature (℃)
Normalized Reset Voltage Threshold vs. Temperature
Normalized Reset Threshold
50
Supply Current vs. Temperature (No Load)
260
220
30
30
SGM8_S
265
10
Temperature (℃)
Temperature (℃)
270
VOD = 200mV
VOD = 100mV
50
110 130
VOD = VTH - VCC
SGM811T/S/R
90
110 130
350
300
SGM811-L/M/J
250
200
150
100
50
0
SGM811-T/S/R
1
10
100
1000
Reset Comparator Overdrive, VTH - VCC (mV)
JANUARY 2015
6
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Reset Output Voltage vs. Supply Voltage
Supply Voltage
5VP-P
2V/div
Reset Output
Voltage
SGM811-R
SGM811-S
200ms/div
SG Micro Corp
www.sg-micro.com
JANUARY 2015
7
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
APPLICATION INFORMATION
Manual Reset
Each of the SGM811/SGM812 devices is equipped with
a manual reset input. This input is designed to operate
in a noisy environment where unwanted glitches could
be induced. These glitches could be produced by the
bouncing action of a switch contact, or where a manual
reset switch may be located some distance away from
the circuit (the cabling of which may pick-up noise).
The manual reset input is guaranteed to ignore logically
valid inputs that are faster than 100ns and to accept
inputs longer in duration than 10μs.
Very Accurate Reset Threshold
Because the SGM811/SGM812 can operate effectively
even when there are large degradations of the supply
voltages, the possibility of a malfunction during a power
failure is greatly reduced. Another advantage of the
SGM811/SGM812 is its very accurate internal voltage
reference circuit. Combined, these benefits produce an
exceptionally reliable microprocessor supervisory
circuit.
Ensuring A Valid Reset Output Down to Vcc
= 0V
When VCC falls below 1.0V, the SGM811/SGM812’s
nRESET no longer sinks current. Therefore, a high
impedance CMOS logic input connected to nRESET
may drift to undetermined logic levels. To eliminate this
problem, a 100kΩ resistor should be connected from
nRESET to ground.
On power-up and after VCC rises above the reset
threshold, an internal timer holds the reset output active
for 240ms (TYP). This is intended as a power-on reset
signal for the processor. It allows time for both the
power supply and the microprocessor to stabilize after
power-up. If a power supply brownout or interruption
occurs, the reset output is similarly activated and
remains active for 240ms (TYP) after the supply
recovers. This allows time for the power supply and
microprocessor to stabilize.
The SGM811 provides an active low reset output
(nRESET) while the SGM812 provides an active high
output (RESET). During power-down of the SGM811,
the nRESET output remains valid (low) with VCC as low
as 1V. This ensures that the microprocessor is held in a
stable shutdown condition as the supply falls and also
ensures that no spurious activity can occur via the
microprocessor as it powers up.
Glitch Immunity
The SGM811/SGM812 contain internal filtering circuitry
providing glitch immunity from fast transient glitches on
the power supply line.
VCC
nRESET
VTH
VTH
t1
VTH
VTH
t1
t1 = nRESET Time = 240ms (TYP)
VTH = nRESET Voltage Threshold
VCC
VCC
Figure 2. Power Fail nRESET Timing
SGM811
nRESET
GND
Figure 1. Ensuring a Valid nRESET Output Down to VCC =
0V
SG Micro Corp
www.sg-micro.com
Reset Output
Interfacing to Other Devices Output
The SGM811/SGM812 are designed to integrate with
as many devices as possible. One feature of the
SGM811/SGM812 is the reset output, which is directly
proportional to VCC (this is guaranteed only while VCC is
greater than 1V). This enables the part to be used with
both 3V and 5V, or any nominal voltage within the
minimum and maximum specifications for VCC.
JANUARY 2015
8
SGM811
SGM812
Microprocessor Supervisory
Circuits with Manual Reset Input
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
JANUARY 2015 ‒ REV.B.3 to REV.B.4
Added SGM811-1.63 Option.............................................................................................................................................................................. All
JANUARY 2013 ‒ REV.B.2 to REV.B.3
Added Recommended Land Pattern Information ......................................................................................................................................... 10, 11
Added Tape and Reel Information ............................................................................................................................................................... 12, 13
SG Micro Corp
www.sg-micro.com
JANUARY 2015
9
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOT-143
1.90
D
0.95
e1
e
2.2
E
E1
1.0
d
b
b1
0.20
0.55
0.95
RECOMMENDED LAND PATTERN (Unit: mm)
L
L1
A
A1
c
θ
0.250
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
0.900
1.150
0.035
0.045
A1
0.000
0.100
0.000
0.004
A2
0.900
1.050
0.035
0.041
b
0.300
0.500
0.012
0.020
b1
0.750
0.900
0.030
0.035
c
0.080
0.150
0.003
0.006
D
2.800
3.000
0.110
0.118
d
0.200 TYP
0.008 TYP
E
1.200
1.400
0.047
0.055
E1
2.250
2.550
0.089
0.100
2.000
0.071
0.020
8°
e
e1
0.95 TYP
1.800
L
0.037 TYP
0.55 REF
0.022 REF
L1
0.300
0.500
0.012
θ
0°
8°
0°
SG Micro Corp
www.sg-micro.com
0.079
TX00047.000
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOT-23-5
1.90
D
e1
E1
2.59
E
0.99
b
e
0.69
0.95
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
θ
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
c
0.2
Dimensions
In Inches
MIN
MAX
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
0.950 BSC
0.037 BSC
e1
1.900 BSC
0.075 BSC
SG Micro Corp
www.sg-micro.com
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
TX00033.000
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
W
P0
Q1
Q2
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
Q3
Q4
B0
Reel Diameter
A0
P1
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel
Diameter
Reel Width
W1
(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P0
(mm)
P1
(mm)
P2
(mm)
W
(mm)
Pin1
Quadrant
SOT-143
7″
9.5
3.20
2.80
1.30
4.0
4.0
2.0
8.0
Q3
SOT-23-5
7″
9.5
3.20
3.20
1.40
4.0
4.0
2.0
8.0
Q3
SG Micro Corp
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TX10000.000
DD0001
Package Type
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Pizza/Carton
7″ (Option)
368
227
224
8
7″
442
410
224
18
SG Micro Corp
www.sg-micro.com
DD0002
Reel Type
TX20000.000
工商网监
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