ON NCP803SN232T1G Very low supply current 3-pin microprocessor reset monitor Datasheet

MAX803 Series,
NCP803 Series
Very Low Supply Current
3-Pin Microprocessor
Reset Monitor
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.
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.
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MARKING
DIAGRAM
3
3
SOT-23
(TO-236)
CASE 318
1
xxx MG
G
1
2
2
SC-70
(SOT-323)
CASE 419
xx MG
G
1
Features
•Precision VCC Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V
Supplies
•Precision Monitoring Voltages from 1.2 V to 4.9 V Available
in 100 mV Steps
•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
•VCC Transient Immunity
•No External Components
•Wide Operating Temperature: -40°C to 105°C
•Pb-Free Packages are Available
Typical Applications
xxx
M
G
= Specific Device Code
= Date Code
= Pb-Free Package
(Note: Microdot may be in either location)
PIN CONFIGURATION
GND
1
3
RESET
VCC
2
SOT-23/SC-70
•Computers
•Embedded Systems
•Battery Powered Equipment
•Critical Microprocessor Power Supply Monitoring
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
VCC
DEVICE MARKING INFORMATION
VCC
VCC
C = 100 nF
MAX803
NCP803
RESET
See general marking information in the device marking
section on page 7 of this data sheet.
Rpull-up
mP
RESET
GND
GND
0
0
Figure 1. Typical Application Diagram
© Semiconductor Components Industries, LLC, 2007
October, 2007 - Rev. 4
1
Publication Order Number:
MAX803/D
MAX803 Series, NCP803 Series
3
Timeout
Counter
VCC
2
Oscillator
RESET
Vref
1 GND
Figure 2. NCP803, MAX803 Series Open-Drain Active-Low Output
PIN DESCRIPTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Pin No.
Symbol
1
GND
2
RESET
3
VCC
Description
Ground
RESET output remains low while VCC is below the reset voltage threshold, and for a reset timeout
period after VCC rises above reset threshold.
Supply Voltage: C = 100 nF is recommended as a bypass capacitor between VCC and GND.
ABSOLUTE MAXIMUM RATINGS
Rating
Power Supply Voltage (VCC to GND)
Symbol
Value
Unit
VCC
-0.3 to 6.0
V
-0.3 to (VCC + 0.3)
V
20
mA
RESET Output Voltage (CMOS)
Input Current, VCC
Output Current, RESET
20
mA
dV/dt (VCC)
100
V/msec
RqJA
301
314
°C/W
Operating Junction Temperature Range
TJ
-40 to +105
°C
Storage Temperature Range
Tstg
-65 to +150
°C
Lead Temperature (Soldering, 10 Seconds)
Tsol
+260
°C
Thermal Resistance, Junction-to-Air (Note 1)
SOT-23
SC-70
ESD Protection
Human Body Model (HBM): Following Specification JESD22-A114
Machine Model (MM): Following Specification JESD22-A115
Latchup Current Maximum Rating: Following Specification JESD78 Class II
Positive
Negative
V
2000
200
ILatchup
mA
200
200
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.
1. This based on a 35x35x1.6mm FR4 PCB with 10mm2 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.
TJ(max) * TA
with TJ(max) = 150°C
PD +
RqJA
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2
MAX803 Series, NCP803 Series
ELECTRICAL CHARACTERISTICS TA = -40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C. (Note 3)
Symbol
Characteristic
VCC Range
TA = 0°C to +70°C
TA = -40°C to +105°C
Min
Typ
Max
1.0
1.2
-
5.5
5.5
Unit
V
Supply Current
VCC = 3.3 V
TA = -40°C to +85°C
TA = 85°C to +105°C
VCC = 5.5 V
TA = -40°C to +85°C
TA = 85°C to +105°C
ICC
Reset Threshold (Vin Decreasing) (Note 4)
MAX803SQ463/NCP803SN463
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
VTH
mA
-
0.5
-
1.2
2.0
-
0.8
-
1.8
2.5
V
4.56
4.51
4.40
4.63
-
4.70
4.75
4.88
MAX803SQ438/NCP803SN438
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
4.31
4.27
4.16
4.38
4.45
4.49
4.60
MAX803SQ308/NCP803SN308
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
3.04
3.00
2.92
3.08
-
3.11
3.15
3.23
MAX803SQ293/NCP803SN293
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
2.89
2.85
2.78
2.93
-
2.96
3.00
3.08
NCP803SN263
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
2.59
2.55
2.50
2.63
-
2.66
2.70
2.76
NCP803SN232
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
2.29
2.26
2.20
2.32
-
2.35
2.38
2.45
NCP803SN160
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
1.58
1.56
1.52
1.60
-
1.62
1.64
1.68
1.18
1.17
1.14
1.20
-
1.22
1.23
1.26
-
30
-
-
10
-
MAX803SN120, MAX803SQ120
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
Detector Voltage Threshold Temperature Coefficient
VCC to Reset Delay VCC = VTH to (VTH - 100 mV)
Reset Active TimeOut Period (Note 5)
MAX803SN(Q)293D1
MAX803SN(Q)293D2/MAX803SN(Q)308D2
MAX803SN(Q)293D3
MAX803SN(Q)293
tRP
RESET Output Voltage Low
VCC = VTH - 0.2 V
1.6 V v VTH v 2.0 V, ISINK = 0.5 mA
2.1 V v VTH v 4.0 V, ISINK = 1.2 mA
4.1 V v VTH v 4.9 V, ISINK = 3.2 mA
RESET Leakage Current
VCC u VTH, RESET De-asserted
msec
msec
1.0
20
100
140
-
3.3
66
330
460
VOL
-
-
0.3
V
ILEAK
-
-
1
mA
3. Production testing done at TA = 25°C, over temperature limits guaranteed by design.
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
ppm/°C
MAX803 Series, NCP803 Series
TYPICAL OPERATING CHARACTERISTICS
0.5
0.7
VTH = 1.2 V
VTH = 4.63 V
85°C
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
0.6
0.5
25°C
0.4
0.3
-40°C
0.2
0.4
85°C
0.3
25°C
0.2
-40°C
0.1
0.1
0
0
0.5
1.5
2.5
3.5
4.5
5.5
6.5
0.5
1.5
2.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
NORMALIZED THRESHOLD VOLTAGE
85°C
VTH = 2.93 V
0.3
25°C
-40°C
0.1
0
1.5
2.5
3.5
4.5
5.5
6.5
1.001
1.000
VTH = 4.63 V
0.999
0.998
0.997
VTH = 1.2 V
0.996
0.995
0.994
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
Figure 5. Supply Current vs. Supply Voltage
Figure 6. Normalized Reset Threshold Voltage
vs. Temperature
100
OUTPUT VOLTAGE VCC (mV)
SUPPLY CURRENT (mA)
1.002
SUPPLY VOLTAGE (V)
0.5
0.4
VCC = 5.0 V
0.3
VCC = 3.3 V
0.2
VCC = 1.0 V
0.1
0
-50
6.5
5.5
Figure 4. Supply Current vs. Supply Voltage
0.4
0.5
4.5
SUPPLY VOLTAGE (V)
Figure 3. Supply Current vs. Supply Voltage
0.2
3.5
VTH = 4.63 V
ISINK = 500 mA
RESET ASSERTED
80
60
85°C
40
25°C
20
-40°C
0
-25
0
25
50
75
100
0.5 1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Figure 7. Supply Current vs. Temperature
Figure 8. Output Voltage Low vs. Supply
Voltage
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4
5.0
MAX803 Series, NCP803 Series
POWER-DOWN RESET DELAY (msec)
125
VOD = VCC-VTH
100
VOD = 10 mV
75
50
VOD = 20 mV
VOD = 100 mV
25
VOD = 200 mV
0
-50
-25
0
25
50
75
300
240
180
120
VOD = 20 mV
VOD = 100 mV
60
125
100
VOD = VCC-VTH
VOD = 10 mV
VOD = 200 mV
0
-50
-25
0
25
50
75
100
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)
NORMALIZED POWER-UP RESET TIMEOUT
POWER-DOWN RESET DELAY (msec)
TYPICAL OPERATING CHARACTERISTICS
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-50
-25
0
25
50
75
TEMPERATURE (°C)
Figure 11. Normalized Power-Up Reset vs.
Temperature
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5
100
125
MAX803 Series, NCP803 Series
Detail Operation Description
power interruption and VCC becomes significantly
deficient, it will fall below the lower detector threshold
(VTH-). This event causes the RESET output to be in the low
state for the MAX803 and NCP803 devices. After
completion of the power interruption, VCC will rise to its
nominal level and become greater than the VTH. This
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.
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
consider that input voltage VCC is at a nominal level greater
than the voltage detector upper threshold (VTH). And the
RESET (RESET) output voltage (Pin 2) will be in the high
state for MAX803 and NCP803 devices. If there is an input
Input Voltage
VCC
VTH+
VTH–
VCC
Reset Output
MAX803, NCP803
Reset Output
MAX810
VTH–
0V
VCC
VTH–
0V
tRP
Figure 12. Timing Waveforms
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6
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
VCC = 0 V.
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.
VCC
VCC
MAX809
NCP803
R1
100 k*
RESET
VCC
GND
VTH
Overdrive
*Assume High-Z Reset Input to Microprocessor
Figure 14. RESET Signal Integrity
MAXIMUM TRANSIENT DURATION (msec)
Duration
MAX803 RESET Output Allows Use With Two Power
Supplies
250
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
the threshold level. This occurs at a VCC level that depends
on the Rpullup value and the voltage which is connected.
200
150
VTH = 4.63 V
100
VTH = 1.2 V
50
0
10
VCC1
60
110
160
210
260
310
VCC2
360 410
RESET COMPARATOR OVERDRIVE (mV)
VCC
MAX803
NCP803
RESET
Figure 13. Maximum Transient Duration vs.
Overdrive for Glitch Rejection at 25°C
RESET Signal Integrity During Power-Down
The MAX803/NCP803 RESET output is valid to VCC =
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
GND
Rpullup
VCC
Microprocessor
RESET
GND
Figure 15. MAX803 RESET Output with Two Supplies
ORDERING, MARKING AND THRESHOLD INFORMATION
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7
MAX803 Series, NCP803 Series
ORDERING, MARKING AND THRESHOLD INFORMATION
Part Number
Vth*
(V)
Time out**
(ms)
NCP803SN160T1
1.60
NCP803SN160T1G
1.60
NCP803SN232T1
Description
Marking
Package
140-460
SCQ
SOT23-3
140-460
SCQ
SOT23-3
(Pb-Free)
2.32
140-460
SQR
SOT23-3
NCP803SN232T1G
2.32
140-460
SQR
SOT23-3
(Pb-Free)
NCP803SN263T1
2.63
140-460
SQC
SOT23-3
NCP803SN263T1G
2.63
140-460
SQC
SOT23-3
(Pb-Free)
NCP803SN293T1
2.93
140-460
SQD
SOT23-3
NCP803SN293T1G
2.93
140-460
SQD
SOT23-3
(Pb-Free)
NCP803SN308T1
3.08
140-460
SQE
SOT23-3
NCP803SN308T1G
3.08
140-460
SQE
SOT23-3
(Pb-Free)
NCP803SN438T1
4.38
140-460
SQF
SOT23-3
NCP803SN438T1G
4.38
140-460
SQF
SOT23-3
(Pb-Free)
NCP803SN463T1
4.63
140-460
SQG
SOT23-3
NCP803SN463T1G
4.63
140-460
SQG
SOT23-3
(Pb-Free)
NCP803SN120T1G
1.20
140-460
SSW
SOT23-3
(Pb-Free)
NCP803SN293D1T1G
2.93
1-3.3
SSX
SOT23-3
(Pb-Free)
NCP803SN293D2T1G
2.93
20-66
SSY
SOT23-3
(Pb-Free)
NCP803SN293D3T1G
2.93
100-330
SSZ
SOT23-3
(Pb-Free)
MAX803SQ120T1G
1.20
140-460
ZV
SC70-3
(Pb-Free)
MAX803SQ263T1G
2.63
140-460
SX
SC70-3
(Pb-Free)
MAX803SQ293T1G
2.93
140-460
ZW
SC70-3
(Pb-Free)
MAX803SQ308T1G
3.08
140-460
ZX
SC70-3
(Pb-Free)
MAX803SQ438T1G
4.38
140-460
ZY
SC70-3
(Pb-Free)
MAX803SQ463T1G
4.63
140-460
ZZ
SC70-3
(Pb-Free)
MAX803SQ293D1T1G
2.93
1-3.3
YA
SC70-3
(Pb-Free)
MAX803SQ293D2T1G
2.93
20-66
YB
SC70-3
(Pb-Free)
MAX803SQ308D2T1G
3.08
20-66
SY
SC70-3
(Pb-Free)
MAX803SQ293D3T1G
2.93
100-330
YC
SC70-3
(Pb-Free)
Open Drain RESET
Shipping
3000 / Tape & Reel
*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 AN
D
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD
THICKNESS IS THE MINIMUM THICKNESS OF
BASE MATERIAL.
4. 318-01 THRU -07 AND -09 OBSOLETE, NEW
STANDARD 318-08.
SEE VIEW C
3
HE
E
c
1
2
b
DIM
A
A1
b
c
D
E
e
L
L1
HE
0.25
e
q
A
L
A1
L1
MIN
0.89
0.01
0.37
0.09
2.80
1.20
1.78
0.10
0.35
2.10
MILLIMETERS
NOM
MAX
1.00
1.11
0.06
0.10
0.44
0.50
0.13
0.18
2.90
3.04
1.30
1.40
1.90
2.04
0.20
0.30
0.54
0.69
2.40
2.64
VIEW C
SOLDERING FOOTPRINT*
0.95
0.037
0.95
0.037
2.0
0.079
0.9
0.035
0.8
0.031
SCALE 10:1
mm Ǔ
ǒinches
*For additional information on our Pb-Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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9
MIN
0.035
0.001
0.015
0.003
0.110
0.047
0.070
0.004
0.014
0.083
INCHES
NOM
0.040
0.002
0.018
0.005
0.114
0.051
0.075
0.008
0.021
0.094
MAX
0.044
0.004
0.020
0.007
0.120
0.055
0.081
0.012
0.029
0.104
MAX803 Series, NCP803 Series
PACKAGE DIMENSIONS
SC-70 (SOT-323)
CASE 419-04
ISSUE M
D
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
e1
3
E
HE
1
DIM
A
A1
A2
b
c
D
E
e
e1
L
HE
2
b
e
0.05 (0.002)
c
A2
A
MIN
0.80
0.00
0.30
0.10
1.80
1.15
1.20
2.00
MILLIMETERS
NOM
MAX
0.90
1.00
0.05
0.10
0.7 REF
0.35
0.40
0.18
0.25
2.10
2.20
1.24
1.35
1.30
1.40
0.65 BSC
0.425 REF
2.10
2.40
MIN
0.032
0.000
0.012
0.004
0.071
0.045
0.047
0.079
INCHES
NOM
0.035
0.002
0.028 REF
0.014
0.007
0.083
0.049
0.051
0.026 BSC
0.017 REF
0.083
MAX
0.040
0.004
0.016
0.010
0.087
0.053
0.055
0.095
L
A1
SOLDERING FOOTPRINT*
0.65
0.025
0.65
0.025
1.9
0.075
0.9
0.035
0.7
0.028
SCALE 10:1
mm Ǔ
ǒinches
*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
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MAX803/D
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