SGM823 [SGMICRO]
Microprocessor Supervisory Circuit with Watchdog Timer and Manual Reset;
| 型号： | SGM823 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | Microprocessor Supervisory Circuit with Watchdog Timer and Manual Reset |
| 文件： | 总10页 (文件大小：617K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM823
Microprocessor Supervisory Circuit
with Watchdog Timer and Manual Reset
GENERAL DESCRIPTION
FEATURES
The SGM823 is an integrated microprocessor
supervisory device with watchdog and manual reset
functions. Compared with the design using a single IC
or discrete components, this integration design has the
advantage of improving system stability and accuracy.
The special design on SGM823 can ignore the fast
transients on VCC.
● Ultra-Low Supply Current: < 1μA (TYP)
● Precision Supply-Voltage Monitor
4.63V for SGM823-L
3.08V for SGM823-T
2.93V for SGM823-S
2.63V for SGM823-R
● Guaranteed nRESET Valid at VCC = 1V
● Push-Pull nRESET Output
The SGM823 has four fixed reset threshold voltages
of 4.63V, 3.08V, 2.93V and 2.63V. When VCC is as low
as 1V, the reset output can still operate. And it also has
a low-level active manual reset nMR function.
● Reset Pulse Width: 200ms (TYP)
● Debounced TTL/CMOS-Compatible
● Manual Reset Input
● Watchdog Timer with 1.6s (TYP) Timeout
● Fully Specified over Temperature
● Power-Supply Transient Immunity
● Without External Components
● -40℃ to +125℃ Operating Temperature Range
● Available in a Green SOT-23-5 Package
The SGM823 is available in a Green SOT-23-5 package.
It operates over an ambient temperature range of -40℃
to +125℃.
APPLICATIONS
Computers
Portable Equipment
Automotive Equipment
Intelligent Instruments
Critical μP Power Monitoring
TYPICAL APPLICATION
VCC
VCC
Microprocessor
VCC
nRESET
nRESET
SGM823
nMR
WDI
I/O
Manual
Reset
GND
GND
SG Micro Corp
www.sg-micro.com
JULY 2020–REV. A.2
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
PACKAGE/ORDERING INFORMATION
RESET
THRESHOLD (V)
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
4.63
3.08
2.93
2.63
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SGM823-LXN5G/TR
SGM823-TXN5G/TR
SGM823-SXN5G/TR
SGM823-RXN5G/TR
MNFXX
MG6XX
MG7XX
MG8XX
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
SGM823
MARKING INFORMATION
NOTE: XX = Date Code.
YYY X X
Date Code - Week
Date Code - Year
Serial Number
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
OVERSTRESS CAUTION
Terminal Voltage (with Respect to GND)
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.
VCC ................................................................-0.3V to 6.0V
All Other Inputs .................................-0.3V to (VCC + 0.3V)
Input Current
V
CC ........................................................................... 20mA
GND ......................................................................... 20mA
Output Current
All Outputs................................................................ 20mA
Package Thermal Resistance
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged if ESD protections are
not considered carefully. 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 even small parametric changes could cause the
device not to meet the published specifications.
SOT-23-5, θJA .......................................................... 234℃/W
Junction Temperature................................................+150℃
Storage Temperature Range....................... -65℃ to +150℃
Lead Temperature (Soldering, 10s)...........................+260℃
ESD Susceptibility
HBM.............................................................................4000V
MM.................................................................................400V
CDM ............................................................................1000V
RECOMMENDED OPERATING CONDITIONS
Ambient Temperature Range........................-40℃ to +125℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
JULY 2020
2
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
PIN CONFIGURATION
(TOP VIEW)
nRESET
GND
1
2
5
4
VCC
nMR
WDI
3
SOT-23-5
PIN DESCRIPTION
PIN
NAME
nRESET
GND
FUNCTION
Active-Low Reset Output Pin. It delivers a 200ms (TYP) low pulse when activated. nRESET remains
low if VCC is below the reset threshold or nMR is logic low. It goes (or remains) low for 200ms after any
of the following events: VCC rises above the reset threshold, a watchdog expiry triggers a reset, or the
nMR input goes from low to high.
1
2
Ground.
Manual Reset Input Pin. nRESET keeps low when nMR is low. When nMR is high, nRESET becomes
high after a 200ms timeout period. It is an active-low reset input with an internal 59kΩ pull-up resistor.
nMR can be driven by a CMOS logic or by a switch shorting to GND. If not used, leave it open or
3
nMR
connect it to VCC
.
Watchdog Input Pin. If the high or low state of WDI exceeds the watchdog timeout period, the internal
watchdog timer is expired and a reset is triggered. The internal watchdog timer is clear while a reset is
asserted. The timer is also cleared if the WDI input is changed (on rising or falling edges). The
watchdog feature is disabled if the WDI is left open or if it is connected to a three-stated buffer output.
4
5
WDI
VCC
Supply Voltage Pin.
SG Micro Corp
JULY 2020
www.sg-micro.com
3
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
ELECTRICAL CHARACTERISTICS
(TA = +25℃, VCC = 4.73V to 5.5V for SGM823-L, VCC = 3.14V to 5.5V for SGM823-T, VCC = 2.99V to 5.5V for SGM823-S, VCC
2.68V to 5.5V for SGM823-R, Full = -40℃ to +125℃, unless otherwise noted.)
=
PARAMETER
CONDITIONS
TEMP
Full
MIN
TYP
MAX
5.5
UNITS
Operating Voltage Range (VCC
)
1
V
VCC = 3.6V
VCC = 5.5V
Full
0.5
0.7
1.2
Supply Current (ISUPPLY
)
μA
Full
1.4
4.55
4.54
3.03
3.02
2.88
2.87
2.59
2.58
4.63
4.63
3.08
3.08
2.93
2.93
2.63
2.63
20
4.70
4.73
3.13
3.14
2.98
2.99
2.67
2.68
+25℃
Full
SGM823-L
SGM823-T
SGM823-S
SGM823-R
+25℃
Full
nRESET Threshold (VnRST
)
V
+25℃
Full
+25℃
Full
SGM823-L
SGM823-T
SGM823-S
SGM823-R
+25℃
+25℃
+25℃
+25℃
Full
14
nRESET Threshold Hysteresis (VHYS
)
mV
13
12
nRESET Threshold Temperature Coefficient
20
ppm/℃
nRESET Pulse Width (tRP
)
Full
140
200
290
0.4
ms
SGM823-L, VCC = VnRST(MAX)
ISOURCE = 120μA
SGM823-T/S/R, VCC = VnRST(MAX)
ISOURCE = 30μA
,
Full
Full
Full
VCC - 1.5
VOH
,
0.8 × VCC
SGM823-L, VCC = VnRST(MIN)
ISINK = 3.2mA
,
nRESET Output Voltage
V
SGM823-T/S/R, VCC = VnRST(MIN)
ISINK = 1.2mA
,
VOL
Full
Full
Full
0.3
0.3
460
VCC = 1V, VCC falling, ISINK = 50μA
SGM823-L, nRESET = 0V,
VCC = 5.5V
nRESET Output Short-Circuit Current
(ISOURCE
μA
)
SGM823-T/S/R, nRESET = 0V,
VCC = 3.6V
Full
430
VCC to Reset Delay (tRD
)
VnRST - VCC = 100mV
84
μs
sec
ns
+25℃
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Watchdog Timeout Period (tWD
)
1.1
90
1.6
2.4
0.8
0.8
0.5
0.8
WDI Pulse Width (tWP
)
VIL = 0V, VIH = VCC
VCC = 5V
Low
High
Low
High
VCC = 5V
3.5
0.7 × VCC
-0.5
WDI Input Threshold
V
VnRST(MAX) < VCC < 3.6V
VnRST(MAX) < VCC < 3.6V
WDI = VCC, time average
WDI = 0V, time average
0.02
WDI Input Current
nMR Input Voltage
μA
-0.01
VIL
VIH
V
2
nMR Pulse Width (tMR
)
300
ns
ns
nMR Noise Immunity
(Pulse width with no reset)
nMR to nRESET Out Delay (tMD
130
59
+25℃
)
Full
Full
470
78
ns
nMR Pull-Up Resistance (Internal)
44
kΩ
SG Micro Corp
www.sg-micro.com
JULY 2020
4
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
TYPICAL PERFORMANCE CHARACTERISTICS
nRESET Timeout Period vs. Temperature
nRESET Comparator Propagation Delay vs. Temperature
240
230
220
210
200
190
180
140
120
100
80
VCC Falling
60
40
20
-50 -25
0
25
50
75 100 125 150
-50 -25
0
25
50
75 100 125 150
Temperature (℃)
Temperature (℃)
Watchdog Timeout Period vs. Temperature
Normalized nRESET Threshold Voltage vs. Temperature
1.06
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.04
1.02
1.00
0.98
0.96
0.94
-50 -25
0
25
50
75 100 125 150
-50 -25
0
25
50
75 100 125 150
Temperature (℃)
Temperature (℃)
SG Micro Corp
www.sg-micro.com
JULY 2020
5
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
FUNCTIONAL BLOCK DIAGRAM
VCC
+
_
1.25V
Reset
Generator
nRESET
nMR
+
-
Watchdog
Transition Detector
Watchdog
Timer
WDI
SGM823
GND
SG Micro Corp
www.sg-micro.com
JULY 2020
6
Microprocessor Supervisory Circuit
SGM823
with Watchdog Timer and Manual Reset
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
JULY 2020 ‒ REV.A.1 to REV.A.2
Page
Updated Features section....................................................................................................................................................................................1
Changed Detailed Description section .................................................................................................................................................................7
JANUARY 2020 ‒ REV.A to REV.A.1
Page
Changed Electrical Characteristics section..........................................................................................................................................................4
Changed Typical Performance Characteristics section ........................................................................................................................................5
Changed Figure 1................................................................................................................................................................................................7
Changes from Original (DECEMBER 2018) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
JULY 2020
7
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOT-23-5
1.90
D
e1
2.59
E1
E
0.99
b
e
0.95
0.69
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
c
θ
0.2
A2
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
1.250
0.100
1.150
0.500
0.200
3.020
1.700
2.950
MIN
MAX
0.049
0.004
0.045
0.020
0.008
0.119
0.067
0.116
A
A1
A2
b
1.050
0.000
1.050
0.300
0.100
2.820
1.500
2.650
0.041
0.000
0.041
0.012
0.004
0.111
0.059
0.104
c
D
E
E1
e
0.950 BSC
1.900 BSC
0.037 BSC
0.075 BSC
e1
L
0.300
0°
0.600
8°
0.012
0°
0.024
8°
θ
SG Micro Corp
www.sg-micro.com
TX00033.000
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
SOT-23-5
7″
9.5
3.20
3.20
1.40
4.0
4.0
2.0
8.0
Q3
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
7″ (Option)
7″
368
442
227
410
224
224
8
18
SG Micro Corp
www.sg-micro.com
TX20000.000
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