The NCP302 and NCP303 series are second generation ultra−low
current voltage detectors that contain a programmable time delay
generator. These devices are specifically designed for use as reset
controllers in portable microprocessor based systems where extended
battery life is paramount.
Each series features a highly accurate undervoltage detector with
hysteresis and an externally programmable time delay generator. This
combination of features prevents erratic system reset operation.
The NCP302 series consists of complementary output devices that
are available with either an active high or active low reset. The
NCP303 series has an open drain N−Channel output with an active low
reset output.
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1
THIN SOT23−5/TSOP−5/SC59−5
CASE 483
Features
• Quiescent Current of 0.5 A Typical
• High Accuracy Undervoltage Threshold of 2.0%
• Externally Programmable Time Delay Generator
• Wide Operating Voltage Range of 0.8 V to 10 V
• Complementary or Open Drain Output
• Active Low or Active High Reset
• Pb−Free Packages are Available
T ypical Applications
• Microprocessor Reset Controller
• Low Battery Detection
• Power Fail Indicator
• Battery Backup Detection
NCP302xSNxxT1
Complementary Output Configuration
2 Input
PIN CONNECTIONS AND
MARKING DIAGRAM
Reset
Output
Input
Ground
xxx =Specific Device Code
Y= Year
W= Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 22 of this data sheet.
Open Drain Output Configuration
2 Input
NCP303LSNxxT1
1
2
3
(Top View)
xxxYW
5
C
D
4
N.C.
1 Reset Output
R
D
V
ref
3GND
5C
* Inverter for active low devices.
*Buffer for active high devices.
Semiconductor Components Industries, LLC, 2005
January, 2005 − Rev. 14.5
1
*
D
This device contains 28 active transistors.
Figure 1. Representative Block Diagrams
Reset
Output
1Publication Order Number:
V
ref
3GND
R
D
5C
D
NCP302/D
NCP302, NCP303
Á
Á
Á
Á
Á
Á
Á
Á
MAXIMUM RATINGS
RatingSymbolValueUnit
Input Power Supply Voltage (Pin 2)
Delay Capacitor Pin Voltage (Pin 5)
Output Voltage (Pin 1)
Complementary, NCP302
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N−Channel Open Drain, NCP303
Output Current (Pin 1) (Note 2)
Thermal Resistance Junction−to−Air
Maximum Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Moisture Sensitivity Level (TA = 235°C)
Latchup Performance
Positive
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Negative
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 device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.
2. The maximum package power dissipation limit must not be exceeded.
Maximum Operating Voltage (Pin 2)V
Minimum Operating Voltage (Pin 2)
(T
= −40°C to 85°C)
A
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices)
Nch Sink Current, NCP302, NCP303
= 0.05V, Vin = 0.70V)
(V
OUT
= 0.50V, Vin = 1.5V)
(V
OUT
Pch Source Current, NCP302
(V
= 5.9V, Vin = 8.0V)1.510.5−
OUT
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices)
Nch Sink Current, NCP302, NCP303
(V
= 0.5 V, Vin = 5.0 V)6.311−
OUT
Pch Source Current, NCP302
(V
= 0.4 V, Vin = 0.7 V)
OUT
= GND, Vin = 1.5 V)
(V
OUT
CD Delay Pin Threshold Voltage (Pin 5)
= 5.17 V)
(V
in
Delay Capacitor Pin Sink Current (Pin 5)
(V
= 0.7 V, VCD = 0.1V)
in
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= 1.5 V, VCD = 0.5V)
(V
in
ÁÁÁ
Delay Pullup Resistance (Pin 5)R
I
OUT
I
OUT
V
TCD
I
CD
V
DET−
HYS
I
in(max)
V
in(min)
I
OUT
I
OUT
V
TCD
I
CD
mA
0.01
1.0
0.05
2.0
−
−
mA
0.011
0.525
0.04
0.6
−
−
V
2.253.043.83
A
2.0
ÁÁ
200
D
0.51.02.0M
4.606
120
ÁÁ
1600
4.70
−
ÁÁ
−
4.794
Á
V
0.1410.2350.329V
in
−
ÁÁ
−
0.34
ÁÁ
0.53
1.0
ÁÁ
1.4
A
Á
−−10V
−
−
0.55
0.65
0.70
0.80
V
mA
0.01
1.0
0.05
2.0
−
−
mA
0.011
0.525
0.04
0.6
−
−
V
2.593.494.40
A
2.0
ÁÁ
200
D
0.51.02.0M
120
ÁÁ
1600
−
ÁÁ
−
Á
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V
DET+
+ 2.0 V
NCP302, NCP303
+ 2.0 V
V
DET+
NCP303LNCP302L
Input Voltage,
Pin 2
0.7 V
GND
5.0 V
2.5 V
GND
t
D1
t
D2
Reset Output
Voltage, Pin 1
V
V
DET+
DET+
0.7 V
GND
+ 2.0 V
+ 2.0 V
2
GND
t
D1
t
D2
NCP302 and NCP303 series are measured with a 10 pF capacitive load. NCP303 has an additional 470 k pullup resistor
connected from the reset output to +5.0 V. The reset output voltage waveforms are shown for the active low ‘L’ devices. Output
time delay t
threshold, V
and tD2 are dependent upon the delay capacitance. Refer to Figures 12, 13, and 14. The upper detector
D1
is the sum of the lower detector threshold, V
DET+
Figure 2. Measurement Conditions for tD1 and t
plus the input hysteresis, V
DET−
D2
HYS
.
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NCP302, NCP303
D
ld
T able 1. ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V