SGM706-TYS8G/TR [SGMICRO]
Low-Cost, Microprocessor Supervisory Circuit;
| 型号： | SGM706-TYS8G/TR |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | Low-Cost, Microprocessor Supervisory Circuit |
| 文件： | 总13页 (文件大小：1016K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM706
Low-Cost, Microprocessor
Supervisory Circuit
GENERAL DESCRIPTION
FEATURES
The SGM706 microprocessor supervisory circuit
reduces the complexity and number of components
required to monitor power supply and monitor
microprocessor activity. It significantly improves system
reliability and accuracy compared to separate ICs or
discrete components.
● Precision Supply-Voltage Monitor
4.65V for SGM706-L
4.40V for SGM706-M
4.0V for SGM706-J
3.08V for SGM706-T
2.93V for SGM706-S
2.63V for SGM706-R
The SGM706 provides power supply monitoring
circuitry that generates a reset output during power-up,
power-down and brownout conditions. The reset output
remains operational with VCC as low as 1V.
Independent watchdog monitoring circuitry is also
provided. This is activated if the watchdog input has not
been toggled within 1.6 seconds.
● Guaranteed
Valid at VCC = 1V
RESET
● 200ms Reset Pulse Width
● Debounced TTL/CMOS-Compatible
Manual-Reset Input
● Independent Watchdog Timer (1.6sec) Timeout
● Voltage Monitor for Power-Fail or Low-Battery
Warning
In addition, there is a 1.25V threshold detector for
power-fail warning, low-battery detection, or monitoring
an additional power supply. An active-low manual-reset
● -40℃ to +85℃ Operating Temperature Range
● SGM706 is Available in Green SOIC-8 Package
● SGM706-S is Available in both Green SOIC-8 and
MSOP-8 Packages
input ( ) is also included.
MR
The SGM706 is available in Green SOIC-8 package.
The SGM706-S is available in both Green SOIC-8 and
MSOP-8 packages. They operate over an ambient
temperature range of -40℃ to +85℃.
APPLICATIONS
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical μP Power Monitoring
TYPICAL APPLICATION
UNREGULATED DC
+5V DC LINEAR
REGULATOR
MICROPROCESSOR
VCC
VCC
RESET
RESET
WDI
I/O LINE
NMI
SGM706
PFI
MR
WDO
PFO
INTERRUPT
PUSHBUTTON
SWITCH
SG Micro Corp
DECEMBER2017–REV.B
www.sg-micro.com
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
PACKAGE/ORDERING INFORMATION
RESET
THRESHOLD (V)
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKAGE
OPTION
MODEL
SGM706-LYS8
XXXXX
4.65
4.40
4.0
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
MSOP-8
SOIC-8
SGM706-LYS8G/TR
SGM706-MYS8G/TR
SGM706-JYS8G/TR
SGM706-TYS8G/TR
SGM706-SYS8G/TR
SGM706-SYMS8G/TR
SGM706-RYS8G/TR
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
SGM706-MYS8
XXXXX
SGM706-JYS8
XXXXX
SGM706-TYS8
XXXXX
SGM706
3.08
2.93
2.93
2.63
SGM706-SYS8
XXXXX
SGM706S
YMS8
XXXXX
SGM706-RYS8
XXXXX
NOTE: XXXXX = Date Code and Vendor 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.
ABSOLUTE MAXIMUM RATINGS
(Typical values are at TA = +25℃, unless otherwise noted.)
Terminal Voltage (with respect to GND)
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.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete 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.
VCC ..................................................................-0.3V to 6.0V
All Other Inputs ...................................-0.3V to (VCC + 0.3V)
Input Current, VCC ........................................................ 20mA
GND........................................................................... 20mA
Output Current, (all outputs) ....................................... 20mA
Operating Temperature Range...................... -40℃ to +85℃
Junction Temperature................................................+150℃
Storage Temperature................................... -65℃ to +150℃
Lead Temperature (Soldering, 10s)...........................+260℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuitdesign, specificationor other related things if necessary
without notice at any time.
ESD Susceptibility
HBM............................................................................ 4000V
MM................................................................................ 300V
OVERSTRESS CAUTION
Stresses beyond those listed may cause permanent damage
to the device. Functional operation of the device at these or
any other conditions beyond those indicated in the
operational section of the specification is not implied.
Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
2
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
PIN CONFIGURATIONS
SGM706-L/M/J/T/S/R (TOP VIEW)
SGM706-S (TOP VIEW)
1
2
3
4
1
2
3
4
8
8
7
6
5
RESET
WDO
MR
WDI
MR
VCC
WDO
RESET
WDI
PFO
PFI
7
6
5
SGM706
-L/M/J/T/S/R
SGM706-S
GND
PFI
VCC
GND
PFO
SOIC-8
MSOP-8
PIN DESCRIPTION
PIN
NAME
FUNCTION
SOIC-8
MSOP-8
Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input
has an internal 250μA (VCC = +5V) pull-up current. It can be driven from a TTL or CMOS
logic line as well as shorted to ground with a switch.
1
3
MR
2
3
4
5
VCC
Power Supply Voltage that is monitored.
0V Ground Reference for all signals.
GND
Power-Fail Voltage Monitor Input. When PFI is less than 1.25V,
Connect PFI to GND or VCC when not used.
goes low.
PFO
4
5
6
7
PFI
Power-Fail Output goes low and sinks current when PFI is less than 1.25V; otherwise
stays high.
PFO
PFO
Watchdog Input. If WDI remains high or low for 1.6sec, the internal watchdog timer runs
out and WDO goes low (BLOCK DIAGRAM). Floating WDI or connecting WDI to a
high-impedance three-state buffer disables the watchdog feature. The internal watchdog
timer clears whenever reset is asserted, WDI is three-stated, or WDI sees a rising or
falling edge.
Active-Low Reset Output pulses low for 200ms when triggered, and stays low whenever
VCC is below the reset threshold (4.65V for SGM706-L, 4.4V for SGM706-M, 4.0V for
SGM706-J, 3.08V for SGM706-T and 2.93V for SGM706-S, 2.63V for SGM706-R). It
6
7
8
1
WDI
RESET
remains low for 200ms after VCC rises above the reset threshold or
goes from low to
MR
high. A watchdog timeout will not trigger
unless
is connected to
WDO
.
MR
RESET
Watchdog Output pulls low when the internal watchdog timer finishes its 1.6sec count
and does not go high again until the watchdog is cleared. also goes low during
WDO
low-line conditions. Whenever VCC is below the reset threshold,
stays low;
WDO
8
2
WDO
however, unlike
,
does not have a minimum pulse width. As soon as VCC
RESET WDO
rises above the reset threshold,
goes high with no delay.
WDO
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
3
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
ELECTRICAL CHARACTERISTICS
(VCC = 4.75V to 5.5V for SGM706-L; VCC = 4.5V to 5.5V for SGM706-M; VCC = 4.07V to 5.5V for SGM706-J; VCC = 3.14V to 5.5V
for SGM706-T; VCC = 2.95V to 5.5V for SGM706-S; VCC = 2.68V to 5.5V for SGM706-R; TA = -40°C to +85°C, unless otherwise
noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
V
Operating Voltage Range (VCC
)
1.0
Supply Current (ISUPPLY
)
50
4.65
4.4
150
μA
SGM706-L
SGM706-M
SGM706-J
SGM706-T
4.5
4.75
4.5
4.25
3.91
3.02
2.85
2.82
2.56
4.0
4.07
3.14
2.95
2.95
2.68
Reset Threshold (VRT
)
3.08
2.93
2.93
2.63
40
V
SGM706-S (SOIC-8)
SGM706-S (MSOP-8)
SGM706-R
SGM706-L, SGM706-M
SGM706-J
34
Reset Threshold Hysteresis
mV
SGM706-T, SGM706-S
SGM706-R
25
22
Reset Pulse Width (tRS
)
120
200
280
ms
V
ISOURCE = 800μA
ISINK = 3.2mA
0.7 × VCC
Output Voltage
0.4
0.3
RESET
VCC = 1V, ISINK = 50μA
Watchdog Timeout Period (tWD
)
1.0
70
1.6
2.25
sec
ns
WDI Pulse Width (tWP
)
VIL = 0.4V, VIH = VCC
VCC = 5V
Low
High
Low
High
0.8
0.8
150
VCC = 5V
3.5
WDI Input Threshold
V
VRST(MAX) < VCC < 3.6V
VRST(MAX) < VCC < 3.6V
WDI = VCC
0.7 × VCC
50
WDI Input Current
μA
WDI = 0V
-150
-50
I
SOURCE = 800μA
ISINK = 1.2mA
= 0V
0.7 × VCC
Output Voltage
WDO
V
0.4
100
250
600
μA
Pull-Up Current
MR
MR
MR
ns
Pulse Width (tMR
)
Low
0.8
V
TA = +25℃
Input Threshold
MR
High
2
350
1.3
ns
V
to Reset Out Delay (tMD
)
MR
PFI Input Threshold
PFI Input Current
VCC = 5V
1.18
1.25
0.2
nA
ISOURCE = 800μA
0.7 × VCC
Output Voltage
V
PFO
ISINK = 3.2mA
0.4
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
4
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
FUNCTIONAL BLOCK DIAGRAM
WATCHDOG
6
WATCHDOG
8
TRANSITION
DETECTOR
WDI
TIMER
WDO
VCC
TIMEBASE FOR
RESET AND
WATCHDOG
250μA
1
2
MR
VCC
7
RESET
GENERATOR
RESET
+
_
4.65V for SGM706-L*
4
+
_
5
PFI
PFO
1.25V
SGM706 SOIC-8 Package
3
GND
* 4.65V for SGM706-L
4.40V for SGM706-M
4.0V for SGM706-J
3.08V for SGM706-T
2.93V for SGM706-S
2.63V for SGM706-R
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
5
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
TYPICAL PERFORMANCE CHARACTERISTICS
10kΩ
VCC
VCC
RESET
RESET
30pF
2kΩ
VCC
VCC
RESET
GND
RESET
330pF
GND
+5V
PFI
+
-
PFO
+5V
30pF
1kΩ
+1.25V
1kΩ
PFI
PFO
30pF
+
-
+1.25V
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
6
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
7
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
APPLICATION NOTES
Monitoring a Negative Voltage
Ensuring a Valid RESET Output Down to
VCC = 0V
The power-fail comparator can also monitor a negative supply
rail (Figure 3). When the negative rail is good (a negative
When VCC falls below 1V, the SGM706
output no
RESET
voltage of large magnitude),
is low, and when the
PFO
negative rail is degraded (a negative voltage of lesser
magnitude), is high. By adding the resistors and
longer sinks current-it becomes an open circuit.
High-impedance CMOS logic inputs can drift to undetermined
voltages if left undriven. If a pull-down resistor is added to the
PFO
transistor as shown, a high
triggers reset. As long as
PFO
pin as shown in Figure 1, any stray charge or
RESET
remains high, the SGM706 will keep reset asserted
PFO
leakage currents will be drained to ground, holding
RESET
low. Resistor value (R1) is not critical. It should be about
100kΩ, large enough not to load and small enough
(
= low, RESET = high). Note that this circuit’s
RESET
accuracy depends on the PFI threshold tolerance, the VCC
line, and the resistors.
RESET
to pull
to ground.
RESET
+5V
100kΩ
VCC
MR
R1
R2
SGM706
SGM706
100kΩ
PFI
PFO
2N3904
RESET
RESET
GND
TO μP
R1
V-
+5V
0V
MR
Figure 1.
Valid to Ground Circuit
RESET
+5V
0V
PFO
Monitoring Voltages Other Than the
VTRIP
0V
V-
Unregulated DC Input
5 – 1.25
R1
1.25 - VTRIP
R2
Monitor voltages other than the unregulated DC by
connecting a voltage divider to PFI and adjusting the ratio
appropriately. If required, add hysteresis by connecting a
resistor (with a value approximately 10 times the sum of the
two resistors in the potential divider network) between PFI
=
VTRIP < 0
Figure 3. Monitoring a Negative Voltage
Interfacing to μPs with Bidirectional Reset
Pins
and
. A capacitor between PFI and GND will reduce the
PFO
power-fail circuit’s sensitivity to high-frequency noise on the
line being monitored. can be asserted on other
μPs with bidirectional reset pins, such as the Motorola
68HC11 series, can contend with the SGM706
RESET
output is driven high and
RESET
RESET
voltages in addition to the +5V VCC line. Connect
output. If, for example, the
to
PFO
the Microprocessor wants to pull it low, indeterminate logic
to initiate a
pulse when PFI drops below 1.25V.
MR
RESET
levels may result. To correct this, connect a 4.7kΩ resistor
Figure 2 shows the SGM706 configured to assert
when the +5V supply falls below the reset threshold, or when
the +12V supply falls below approximately 11V.
RESET
between the
output and the μP reset I/O, as in
RESET
Figure 4. Buffer the
components.
output to other system
RESET
+12V +5V
BUFFRED RESET TO OTHER SYSTEM COMPONENTS
TO μP
VCC
RESET
VCC
VCC
1MΩ
1%
Microprocessor
SGM706
SGM706
4.7kΩ
MR
RESET
RESET
130kΩ
1%
GND
GND
PFI
PFO
GND
Figure 4. Interfacing to Microprocessors with
Bidirectional Reset I/O
Figure 2. Monitoring Both +5V and +12V
SG Micro Corp
DECEMBER 2017
www.sg-micro.com
8
Low-Cost, Microprocessor
Supervisory Circuit
SGM706
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DECEMBER 2017 ‒ REV.A.4 to REV.B
Changed Electrical Characteristics section..........................................................................................................................................................4
AUGUST 2017 ‒ REV.A.3 to REV.A.4
SGM706-S Added MSOP-8 Package ................................................................................................................................................................All
MARCH 2017 ‒ REV.A.2 to REV.A.3
Changed Packing Option.....................................................................................................................................................................................2
JANUARY 2013 ‒ REV.A.1 to REV.A.2
Added Recommended Land Pattern Information ...............................................................................................................................................10
Added Tape and Reel Information ............................................................................................................................................................... 11, 12
MAY 2011 ‒ REV.A to REV.A.1
Updated Package Description ...........................................................................................................................................................................All
Changes from Original (APRIL 2010) to REV.A
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
DECEMBER 2017
9
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOIC-8
0.6
D
e
2.2
E1
E
5.2
b
1.27
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
c
θ
A2
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
1.750
0.250
1.550
0.510
0.250
5.100
4.000
6.200
MIN
MAX
0.069
0.010
0.061
0.020
0.010
0.200
0.157
0.244
A
A1
A2
b
1.350
0.100
1.350
0.330
0.170
4.700
3.800
5.800
0.053
0.004
0.053
0.013
0.006
0.185
0.150
0.228
c
D
E
E1
e
1.27 BSC
0.050 BSC
L
0.400
0°
1.270
8°
0.016
0°
0.050
8°
θ
SG Micro Corp
www.sg-micro.com
TX00010.000
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
MSOP-8
b
E1
E
4.8
1.02
e
0.41
0.65
RECOMMENDED LAND PATTERN (Unit: mm)
D
L
A
c
A1
θ
A2
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
1.100
0.150
0.950
0.380
0.230
3.100
3.100
5.050
MIN
MAX
0.043
0.006
0.037
0.015
0.009
0.122
0.122
0.199
A
A1
A2
b
0.820
0.020
0.750
0.250
0.090
2.900
2.900
4.750
0.032
0.001
0.030
0.010
0.004
0.114
0.114
0.187
c
D
E
E1
e
0.650 BSC
0.026 BSC
L
0.400
0°
0.800
6°
0.016
0°
0.031
6°
θ
SG Micro Corp
www.sg-micro.com
TX00014.000
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
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 Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
SOIC-8
13″
13″
12.4
12.4
6.40
5.20
5.40
3.30
2.10
1.50
4.0
4.0
8.0
8.0
2.0
2.0
12.0
12.0
Q1
Q1
MSOP-8
SG Micro Corp
TX10000.000
www.sg-micro.com
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)
Reel Type
Pizza/Carton
13″
386
280
370
5
SG Micro Corp
www.sg-micro.com
TX20000.000
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