NCP803SN400T1G [ONSEMI]
Very Low Supply Current 3-Pin Microprocessor Reset Monitor; 极低的电源电流3引脚微处理器复位监控器
| 型号： | NCP803SN400T1G |
| 厂家： | 
ONSEMI |
| 描述： | Very Low Supply Current 3-Pin Microprocessor Reset Monitor |
| 文件： | 总10页 (文件大小：135K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX803 Series,
NCP803 Series
Very Low Supply Current
3-Pin Microprocessor
Reset Monitor
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MARKING
The MAX803/NCP803 is a cost−effective system supervisor circuit
designed to monitor VCC in digital systems and provide a reset signal to
the host processor when necessary. No external components are
required.
The reset output is driven active within 10 msec of VCC falling
through the reset voltage threshold. Reset is maintained active for a
timeout period which is trimmed by the factory after VCC rises above
the reset threshold. The MAX803/NCP803 has an open drain
active−low RESET output. Both devices are available in SOT−23 and
SC−70 packages.
DIAGRAM
3
3
SOT−23
(TO−236)
CASE 318
xxx MG
G
1
1
2
2
SC−70
(SOT−323)
CASE 419
The MAX803/NCP803 is optimized to reject fast transient glitches
on the VCC line. Low supply current of 0.5 mA (VCC = 3.2 V) make
these devices suitable for battery powered applications.
xx MG
G
1
Features
xxx
M
G
= Specific Device Code
= Date Code
= Pb−Free Package
• Precision V Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V
CC
Supplies
• Precision Monitoring Voltages from 1.2 V to 4.9 V Available
in 100 mV Steps
(Note: Microdot may be in either location)
• Four Guaranteed Minimum Power−On Reset Pulse Width Available
(1 ms, 20 ms, 100 ms, and 140 ms)
• RESET Output Guaranteed to VCC = 1.0 V
• Low Supply Current
PIN CONFIGURATION
GND
1
• VCC Transient Immunity
V
CC
3
• No External Components
• Wide Operating Temperature: −40°C to 105°C
2
RESET
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
SOT−23/SC−70
(Top View)
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microprocessor Power Supply Monitoring
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
V
CC
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 8 of this data sheet.
V
V
CC
CC
R
pull−up
MAX803
NCP803
mP
RESET
C = 100 nF
RESET
GND
GND
0
0
Figure 1. Typical Application Diagram
©
Semiconductor Components Industries, LLC, 2013
1
Publication Order Number:
June, 2013 − Rev. 7
MAX803/D
MAX803 Series, NCP803 Series
3
2
Timeout
Counter
Oscillator
V
CC
RESET
Vref
1 GND
Figure 2. NCP803, MAX803 Series Open−Drain Active−Low Output
PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
GND
Ground
RESET
RESET output remains low while V is below the reset voltage threshold, and for a reset timeout
CC
period after V rises above reset threshold.
CC
3
V
CC
Supply Voltage: C = 100 nF is recommended as a bypass capacitor between V and GND.
CC
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
V
Value
Unit
V
Power Supply Voltage (V to GND)
−0.3 to 6.0
CC
CC
RESET Output Voltage (CMOS)
−0.3 to (V + 0.3)
V
CC
Input Current, V
20
20
mA
CC
Output Current, RESET
dV/dt (V
mA
)
CC
100
V/msec
°C/W
Thermal Resistance, Junction−to−Air (Note 1)
SOT−23
SC−70
R
q
JA
301
314
Operating Junction Temperature Range
Storage Temperature Range
T
−40 to +105
−65 to +150
+260
°C
°C
°C
V
J
T
stg
Lead Temperature (Soldering, 10 Seconds)
ESD Protection
T
sol
2000
200
Human Body Model (HBM): Following Specification JESD22−A114
Machine Model (MM): Following Specification JESD22−A115
Latchup Current Maximum Rating: Following Specification JESD78 Class II
I
mA
Latchup
200
200
Positive
Negative
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
2
1. This based on a 35x35x1.6mm FR4 PCB with 10mm of 1 oz copper traces under natural convention conditions and a single component
characterization.
2. The maximum package power dissipation limit must not be exceeded.
T
* T
J(max)
A
with T
= 150°C
P
D
+
J(max)
R
qJA
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2
MAX803 Series, NCP803 Series
ELECTRICAL CHARACTERISTICS T = −40°C to +105°C unless otherwise noted. Typical values are at T = +25°C. (Note 3)
A
A
Characteristic
Symbol
Min
Typ
Max
Unit
V
CC
Range
V
T = 0°C to +70°C
T = −40°C to +105°C
A
1.0
1.2
−
−
5.5
5.5
A
Supply Current
I
mA
CC
V
CC
= 3.3 V
T = −40°C to +85°C
A
−
−
0.5
−
1.2
2.0
A
T = 85°C to +105°C
V
CC
= 5.5 V
T = −40°C to +85°C
A
−
−
0.8
−
1.8
2.5
A
T = 85°C to +105°C
V
TH
V
Reset Threshold (V Decreasing) (Note 4)
in
MAX803SQ463/NCP803SN463
T = +25°C
A
T = +85°C to +105°C
A
4.56
4.51
4.40
4.63
−
−
4.70
4.75
4.88
A
T = −40°C to +85°C
MAX803SQ438/NCP803SN438
T = +25°C
4.31
4.27
4.16
4.38
4.00
4.45
4.49
4.60
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
NCP803SN400
T = +25°C
3.94
3.90
3.80
4.06
4.10
4.20
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
MAX803SQ308/NCP803SN308
T = +25°C
3.04
3.00
2.92
3.08
−
−
3.11
3.15
3.23
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
MAX803SQ293/NCP803SN293
T = +25°C
2.89
2.85
2.78
2.93
−
−
2.96
3.00
3.08
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
NCP803SN263
T = +25°C
2.59
2.55
2.50
2.63
−
−
2.66
2.70
2.76
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
NCP803SN232
T = +25°C
2.29
2.26
2.20
2.32
−
−
2.35
2.38
2.45
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
NCP803SN160
T = +25°C
1.58
1.56
1.52
1.60
−
−
1.62
1.64
1.68
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
MAX803SN120, MAX803SQ120
T = +25°C
1.18
1.17
1.14
1.20
−
−
1.22
1.23
1.26
A
T = −40°C to +85°C
A
T = +85°C to +105°C
A
Detector Voltage Threshold Temperature Coefficient
−
−
30
10
−
−
ppm/°C
msec
V
CC
to Reset Delay V = V to (V − 100 mV)
CC TH TH
Reset Active TimeOut Period (Note 5)
MAX803SN(Q)293D1
t
msec
RP
1.0
20
100
140
−
−
−
−
3.3
66
330
460
MAX803SN(Q)293D2/MAX803SN(Q)308D2
MAX803SN(Q)293D3
MAX803SN(Q)293
RESET Output Voltage Low
V
OL
−
−
0.3
V
V
CC
= V − 0.2 V
TH
1.6 V v V v 2.0 V, I
= 0.5 mA
= 1.2 mA
= 3.2 mA
TH
SINK
SINK
SINK
2.1 V v V v 4.0 V, I
TH
4.1 V v V v 4.9 V, I
TH
RESET Leakage Current V u V , RESET De−asserted
I
LEAK
−
−
1
mA
CC
TH
3. Production testing done at T = 25°C, over temperature limits guaranteed by design.
A
4. Contact your ON Semiconductor sales representative for other threshold voltage options.
5. Contact your ON Semiconductor sales representative for timeout options availability for other threshold voltage options.
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3
MAX803 Series, NCP803 Series
TYPICAL OPERATING CHARACTERISTICS
0.7
0.6
0.5
0.5
V
TH
= 1.2 V
V
TH
= 4.63 V
85°C
25°C
0.4
85°C
25°C
0.3
0.2
0.4
0.3
−40°C
0.2
0.1
0
−40°C
0.1
0
0.5
1.5
2.5
3.5
4.5
5.5
6.5
0.5
1.5
2.5
3.5
4.5
5.5
6.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Figure 3. Supply Current vs. Supply Voltage
Figure 4. Supply Current vs. Supply Voltage
0.4
0.3
0.2
1.002
1.001
85°C
V
TH
= 2.93 V
1.000
0.999
0.998
0.997
0.996
V
= 4.63 V
TH
25°C
−40°C
V
= 1.2 V
TH
0.1
0
0.995
0.994
0.5
1.5
2.5
3.5
4.5
5.5
6.5
−50 −25
0
25
50
75
100
125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
Figure 5. Supply Current vs. Supply Voltage
Figure 6. Normalized Reset Threshold Voltage
vs. Temperature
0.5
100
80
V
TH
= 4.63 V
I
= 500 mA
SINK
0.4
0.3
0.2
RESET ASSERTED
V
= 5.0 V
CC
60
V
CC
= 3.3 V
= 1.0 V
85°C
25°C
40
V
CC
20
0
0.1
0
−40°C
−50
−25
0
25
50
75
100
0.5 1.0
1.5 2.0
2.5 3.0 3.5
4.0 4.5 5.0
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Figure 7. Supply Current vs. Temperature
Figure 8. Output Voltage Low vs. Supply
Voltage
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MAX803 Series, NCP803 Series
TYPICAL OPERATING CHARACTERISTICS
125
100
75
300
V
OD
= V −V
V = V −V
OD CC TH
CC TH
V
= 10 mV
OD
240
V
= 10 mV
OD
180
120
V
OD
= 20 mV
V
= 20 mV
OD
50
V
OD
= 100 mV
V
OD
= 100 mV
60
0
25
0
V
OD
= 200 mV
V
OD
= 200 mV
−50
−25
0
25
50
75
100
125
−50
−25
0
25
50
75
100
125
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 9. Power−Down Reset Delay vs.
Temperature and Overdrive (VTH = 1.2 V)
Figure 10. Power−Down Reset Delay vs.
Temperature and Overdrive (VTH = 4.63 V)
1.3
1.2
1.1
1.0
0.9
0.8
0.7
−50
−25
0
25
50
75
100
TEMPERATURE (°C)
Figure 11. Normalized Power−Up Reset vs.
Temperature
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5
MAX803 Series, NCP803 Series
Detail Operation Description
The MAX803, NCP803 series microprocessor reset
supervisory circuits are designed to monitor the power
supplies in digital systems and provide a reset signal to the
processor without any external components. Figure 2 shows
the timing diagram and a typical application below. Initially
power interruption and
deficient, it will fall below the lower detector threshold
V
becomes significantly
CC
(V ). This event causes the RESET output to be in the low
TH−
state for the MAX803 and NCP803 devices. After
completion of the power interruption, V will rise to its
CC
consider that input voltage V is at a nominal level greater
nominal level and become greater than the V . This
CC
TH
than the voltage detector upper threshold (V ). And the
sequence activates the internal oscillator circuitry and
digital counter to count. After the count of the timeout
period, the reset output will revert back to the original state.
TH
RESET
(RESET) output voltage (Pin 2) will be in the high
state for MAX803 and NCP803 devices. If there is an input
V
V
V
CC
TH+
TH–
Input Voltage
V
V
CC
Reset Output
TH–
MAX803, NCP803
0V
V
V
CC
Reset Output
MAX810
TH–
0V
t
RP
Figure 12. Timing Waveforms
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MAX803 Series, NCP803 Series
APPLICATIONS INFORMATION
VCC Transient Rejection
the NCP803/MAX803 has Open−Drain and active−low
output, it typically uses a pullup resistor. With this device,
RESET will most likely not maintain an active condition,
but will drift to a non−active level due to the pullup resistor
and the reduced sinking capability of the open−drain device.
Therefore, this device is not recommended for applications
where the RESET pin is required to be valid down to
The MAX803/NCP803 series provides accurate VCC
monitoring and reset timing during power−up,
power−down, and brownout/sag conditions, and rejects
negative−going transients (glitches) on the power supply
line. Figure 13 shows the maximum transient duration vs.
maximum negative excursion (overdrive) for glitch
rejection. Any combination of duration and overdrive which
lies under the curve will not generate a reset signal.
Combinations above the curve are detected as a brownout or
power−down. Typically, transient that goes 100 mV below
the reset threshold and lasts 5.0 ms or less will not cause a
reset pulse. Transient immunity can be improved by adding
a capacitor in close proximity to the VCC pin of the
MAX803.
V
CC
= 0 V.
V
CC
V
CC
R1
MAX809
NCP803
100 k*
RESET
V
CC
GND
V
TH
Overdrive
*Assume High−Z Reset Input to Microprocessor
Figure 14. RESET Signal Integrity
Duration
MAX803 RESET Output Allows Use With Two Power
Supplies
250
200
150
100
50
In numerous applications the pullup resistor place on the
RESET output is connected to the supply voltage monitored
by the IC. Nevertheless, a different supply voltage can also
power this output and so level−shift from the monitored
supply to reset the microprocessor. However, if the
NCP803/MAX803’s supply goes blew 1 V, the RESET
output ability to sink current will decrease and the result is
a high state on the pin even though the supply’s IC is under
V
TH
= 4.63 V
the threshold level. This occurs at a V level that depends
CC
V
TH
= 1.2 V
on the R
value and the voltage which is connected.
pullup
1
2
V
CC
V
CC
0
10
60
110
160
210 260
310
360 410
RESET COMPARATOR OVERDRIVE (mV)
V
V
CC
Figure 13. Maximum Transient Duration vs.
CC
R
pullup
MAX803
NCP803
Overdrive for Glitch Rejection at 25°C
Microprocessor
RESET
RESET
RESET Signal Integrity During Power−Down
The MAX803/NCP803 RESET output is valid to VCC
=
GND
GND
1.0 V. Below this voltage the output becomes an “open
circuit” and does not sink current. This means CMOS logic
inputs to the Microprocessor will be floating at an
undetermined voltage. Most digital systems are completely
shutdown well above this voltage. However, in situations
where RESET must be maintained valid to VCC = 0 V, since
Figure 15. MAX803 RESET Output with Two Supplies
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7
MAX803 Series, NCP803 Series
ORDERING, MARKING AND THRESHOLD INFORMATION
Vth**
(V)
Time out***
(ms)
Part Number
Description
Marking
Package
Shipping
NCP803SN160T1G
1.60
2.32
2.63
2.93
3.08
4.00
4.38
4.63
1.20
2.93
2.93
2.93
1.20
2.63
2.93
3.08
140−460
140−460
140−460
140−460
140−460
140−460
140−460
140−460
140−460
1−3.3
SCQ
SOT23−3
(Pb−Free)
NCP803SN232T1G
NCP803SN263T1G
NCP803SN293T1G
NCP803SN308T1G
NCP803SN400T1G
NCP803SN438T1G
NCP803SN463T1G
NCP803SN120T1G
NCP803SN293D1T1G
NCP803SN293D2T1G
NCP803SN293D3T1G
MAX803SQ120T1G
MAX803SQ263T1G
MAX803SQ293T1G
SQR
SQC
SQD
SQE
RAD
SQF
SQG
SSW
SSX
SSY
SSZ
ZV
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
SOT23−3
(Pb−Free)
20−66
SOT23−3
(Pb−Free)
Open Drain RESET
3000 / Tape & Reel
100−330
140−460
140−460
140−460
SOT23−3
(Pb−Free)
SC70−3
(Pb−Free)
SX
SC70−3
(Pb−Free)
ZW
SC70−3
(Pb−Free)
MAX803SQ308T1G
NCV803SQ308T1G*
MAX803SQ438T1G
140−460
140−460
140−460
ZX
ZA
ZY
SC70−3
(Pb−Free)
4.38
4.63
2.93
2.93
3.08
SC70−3
(Pb−Free)
MAX803SQ463T1G
MAX803SQ293D1T1G
MAX803SQ293D2T1G
140−460
1−3.3
ZZ
YA
YB
SC70−3
(Pb−Free)
SC70−3
(Pb−Free)
20−66
SC70−3
(Pb−Free)
MAX803SQ308D2T1G
NCV803SQ308D2T1G*
MAX803SQ293D3T1G
20−66
20−66
SY
CY
YC
SC70−3
(Pb−Free)
2.93
100−330
SC70−3
(Pb−Free)
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP
Capable.
**Contact your ON Semiconductor sales representative for other threshold voltage options.
***Contact your ON Semiconductor sales representative for timeout options availability for other threshold voltage options.
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8
MAX803 Series, NCP803 Series
PACKAGE DIMENSIONS
SOT−23 (TO236)
CASE 318−08
ISSUE AP
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
D
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH
THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM
THICKNESS OF BASE MATERIAL.
SEE VIEW C
3
4. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH,
PROTRUSIONS, OR GATE BURRS.
H
E
MILLIMETERS
INCHES
NOM
0.040
0.002
0.018
0.005
0.114
0.051
0.075
0.008
0.021
0.094
−−−
E
DIM
A
A1
b
c
D
E
e
L
L1
MIN
0.89
0.01
0.37
0.09
2.80
1.20
1.78
0.10
0.35
2.10
0°
NOM
1.00
0.06
0.44
0.13
2.90
1.30
1.90
0.20
0.54
2.40
−−−
MAX
MIN
0.035
0.001
0.015
0.003
0.110
0.047
0.070
0.004
0.014
0.083
0°
MAX
0.044
0.004
0.020
0.007
0.120
0.055
0.081
0.012
0.029
0.104
10°
1.11
0.10
0.50
0.18
3.04
1.40
2.04
0.30
0.69
2.64
10°
c
1
2
b
0.25
e
q
H
A
E
q
L
A1
L1
VIEW C
SOLDERING FOOTPRINT
0.95
0.037
0.95
0.037
2.0
0.079
0.9
0.035
mm
inches
ǒ
Ǔ
SCALE 10:1
0.8
0.031
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MAX803 Series, NCP803 Series
PACKAGE DIMENSIONS
SC−70 (SOT−323)
CASE 419−04
ISSUE N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
D
e1
MILLIMETERS
INCHES
DIM
A
A1
A2
b
c
D
E
e
e1
L
MIN
0.80
0.00
NOM
0.90
0.05
0.70 REF
0.35
0.18
2.10
1.24
1.30
0.65 BSC
0.38
MAX
1.00
0.10
MIN
0.032
0.000
NOM
0.035
0.002
0.028 REF
0.014
0.007
0.083
0.049
0.051
0.026 BSC
0.015
MAX
0.040
0.004
3
E
H
E
1
2
0.30
0.10
1.80
1.15
1.20
0.40
0.25
2.20
1.35
1.40
0.012
0.004
0.071
0.045
0.047
0.016
0.010
0.087
0.053
0.055
b
e
0.20
2.00
0.56
2.40
0.008
0.079
0.022
0.095
H
2.10
0.083
E
c
A
A2
0.05 (0.002)
L
A1
SOLDERING FOOTPRINT*
0.65
0.025
0.65
0.025
1.9
0.075
0.9
0.035
0.7
0.028
mm
inches
ǒ
Ǔ
SCALE 10:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
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