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 V
CC
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 V
CC
falling
through the reset voltage threshold. Reset is maintained active for a
timeout period which is trimmed by the factory after V
CC
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 V
CC
line. Low supply current of 0.5
mA
(V
CC
= 3.2 V) make
these devices suitable for battery powered applications.
Features
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MARKING
DIAGRAM
3
1
2
SC−70
(SOT−323)
CASE 419
1
xxx
= Specific Device Code
M
= Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
SOT−23
(TO−236)
CASE 318
1
3
xxx MG
G
2
xx MG
G
•
Precision V
CC
Monitor for 1.5 V, 1.8 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 V
CC
= 1.0 V
Low Supply Current
V
CC
Transient Immunity
No External Components
Wide Operating Temperature: −40°C to 105°C
Pb−Free Packages are Available
Computers
Embedded Systems
Battery Powered Equipment
Critical Microprocessor Power Supply Monitoring
V
CC
V
CC
C = 100 nF
MAX803
NCP803
RESET
GND
0
V
CC
R
pull−up
μP
RESET
GND
0
PIN CONFIGURATION
GND
1
3
2
SOT−23/SC−70
(Top View)
V
CC
RESET
Typical Applications
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 7 of this data sheet.
Figure 1. Typical Application Diagram
©
Semiconductor Components Industries, LLC, 2006
1
March, 2006 − Rev. 0
Publication Order Number:
MAX803/D
MAX803 Series, NCP803 Series
PIN DESCRIPTION
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Á
Á
1
2
3
GND
Ground
RESET
V
CC
RESET output remains low while V
CC
is below the reset voltage threshold, and for a reset timeout
period after V
CC
rises above reset threshold.
Supply Voltage: C = 100 nF is recommended as a bypass capacitor between V
CC
and GND.
Pin No.
Symbol
Description
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
V
CC
Value
Unit
V
V
mA
mA
Power Supply Voltage (V
CC
to GND)
RESET Output Voltage (CMOS)
Input Current, V
CC
Output Current, RESET
dV/dt (V
CC
)
Thermal Resistance, Junction−to−Air (Note 1)
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 Seconds)
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
SOT−23
SC−70
−0.3 to 6.0
−0.3 to (V
CC
+ 0.3)
20
20
100
V/msec
°C/W
°C
°C
°C
V
R
qJA
T
J
T
stg
T
sol
301
314
−40 to +105
−65 to +150
+260
2000
200
I
Latchup
200
200
mA
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. This based on a 35x35x1.6mm FR4 PCB with 10mm
2
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 T
J(max)
= 150°C
PD
+
R
qJA
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MAX803 Series, NCP803 Series
ELECTRICAL CHARACTERISTICS
T
A
= −40°C to +105°C unless otherwise noted. Typical values are at T
A
= +25°C. (Note 3)
Characteristic
V
CC
Range
T
A
= 0°C to +70°C
T
A
= −40°C to +105°C
Supply Current
V
CC
= 3.3 V
T
A
= −40°C to +85°C
T
A
= 85°C to +105°C
V
CC
= 5.5 V
T
A
= −40°C to +85°C
T
A
= 85°C to +105°C
Reset Threshold (V
in
Decreasing) (Note 4)
MAX803SQ463/NCP803SN463
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
MAX803SQ438/NCP803SN438
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
MAX803SQ308/NCP803SN308
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
MAX803SQ293/NCP803SN293
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
NCP803SN263
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
NCP803SN232
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
NCP803SN160
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
MAX803SN120, MAX803SQ120
T
A
= +25°C
T
A
= −40°C to +85°C
T
A
= +85°C to +105°C
Detector Voltage Threshold Temperature Coefficient
V
CC
to Reset Delay V
CC
= V
TH
to (V
TH
− 100 mV)
Reset Active TimeOut Period (Note 5)
MAX803SN(Q)293D1
MAX803SN(Q)293D2
MAX803SN(Q)293D3
MAX803SN(Q)293
RESET Output Voltage Low
V
CC
= V
TH
− 0.2 V
1.6 V
v
V
TH
v
2.0 V, I
SINK
= 0.5 mA
2.1 V
v
V
TH
v
4.0 V, I
SINK
= 1.2 mA
4.1 V
v
V
TH
v
4.9 V, I
SINK
= 3.2 mA
RESET Leakage Current
V
CC
u
V
TH
, RESET De−asserted
t
RP
1.0
20
100
140
V
OL
−
−
−
−
−
−
3.3
66
330
460
0.3
V
I
CC
−
−
−
−
V
TH
4.56
4.51
4.40
4.31
4.27
4.16
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
2.29
2.26
2.20
1.58
1.56
1.52
1.18
1.17
1.14
−
−
4.63
−
−
4.38
4.70
4.75
4.88
4.45
4.49
4.60
3.11
3.15
3.23
2.96
3.00
3.08
2.66
2.70
2.76
2.35
2.38
2.45
1.62
1.64
1.68
1.22
1.23
1.26
−
−
ppm/°C
msec
msec
0.5
−
0.8
−
1.2
2.0
1.8
2.5
V
Symbol
Min
1.0
1.2
Typ
−
−
Max
5.5
5.5
mA
Unit
V
3.08
−
−
2.93
−
−
2.63
−
−
2.32
−
−
1.60
−
−
1.20
−
−
30
10
I
LEAK
−
−
1
μA
3. Production testing done at T
A
= 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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MAX803 Series, NCP803 Series
TYPICAL OPERATING CHARACTERISTICS
0.7
V
TH
= 1.2 V
0.6
SUPPLY CURRENT (mA)
0.5
25°C
0.4
0.3
−40°C
0.2
0.1
0
0.5
1.5
2.5
3.5
4.5
5.5
6.5
SUPPLY VOLTAGE (V)
0
0.5
1.5
2.5
3.5
4.5
5.5
6.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
85°C
0.4
85°C
25°C
0.2
−40°C
0.5
V
TH
= 4.63 V
0.3
0.1
Figure 2. Supply Current vs. Supply Voltage
Figure 3. Supply Current vs. Supply Voltage
V
TH
= 2.93 V
SUPPLY CURRENT (mA)
0.3
85°C
NORMALIZED THRESHOLD VOLTAGE
0.4
1.002
1.001
1.000
V
TH
= 4.63 V
0.999
0.998
0.997
V
TH
= 1.2 V
0.996
0.995
0.994
−50
−25
0
25
50
75
100
125
25°C
0.2
−40°C
0.1
0
0.5
1.5
2.5
3.5
4.5
5.5
6.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
Figure 4. Supply Current vs. Supply Voltage
Figure 5. Normalized Reset Threshold Voltage
vs. Temperature
100
OUTPUT VOLTAGE V
CC
(mV)
V
TH
= 4.63 V
I
SINK
= 500
mA
RESET ASSERTED
0.5
SUPPLY CURRENT (mA)
0.4
V
CC
= 5.0 V
0.3
V
CC
= 3.3 V
0.2
V
CC
= 1.0 V
0.1
0
−50
80
60
85°C
40
25°C
20
−40°C
0
0.5 1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
−25
0
25
50
75
100
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Figure 6. Supply Current vs. Temperature
Figure 7. Output Voltage Low vs. Supply
Voltage
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MAX803 Series, NCP803 Series
TYPICAL OPERATING CHARACTERISTICS
POWER−DOWN RESET DELAY (msec)
V
OD
= V
CC
−V
TH
100
V
OD
= 10 mV
75
V
OD
= 20 mV
V
OD
= 100 mV
25
V
OD
= 200 mV
0
−50
−25
0
25
50
75
100
125
TEMPERATURE (°C)
POWER−DOWN RESET DELAY (msec)
125
300
V
OD
= 10 mV
240
V
OD
= V
CC
−V
TH
180
V
OD
= 20 mV
V
OD
= 100 mV
60
V
OD
= 200 mV
0
−50
−25
0
25
50
75
100
125
TEMPERATURE (°C)
50
120
Figure 8. Power−Down Reset Delay vs.
Temperature and Overdrive (V
TH
= 1.2 V)
NORMALIZED POWER−UP RESET TIMEOUT
Figure 9. Power−Down Reset Delay vs.
Temperature and Overdrive (V
TH
= 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 10. Normalized Power−Up Reset vs.
Temperature
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