NCP803SN308T1 [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： | NCP803SN308T1 |
| 厂家： | 
ONSEMI |
| 描述： | Very Low Supply Current 3-Pin Microprocessor Reset Monitor |
| 文件： | 总8页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NCP803
Very Low Supply Current
3−Pin Microprocessor
Reset Monitor
The 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 µsec of VCC falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after VCC rises above the reset threshold. The
NCP803 has an open drain active-low RESET output. The output of
the NCP803 is guaranteed valid down to VCC = 1.0 V and is available
in a SOT-23 package.
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MARKING
DIAGRAM
3
3
SOT-23
(TO-236)
CASE 318
xxxM
1
1
2
2
The NCP803 is optimized to reject fast transient glitches on the VCC
line. Low supply current of 1.0 µA (VCC = 3.2 V) make this device
suitable for battery powered applications.
xxx = Specific Device Code
= Monthly Date Code
M
Features
• Precision VCC Monitor for 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
• Precision Monitoring Voltages from 1.6 V to 4.9 V Available
in 100 mV Steps
PIN CONFIGURATION
1
GND
• 140 msec Guaranteed Minimum RESET Output Duration
• RESET Output Guaranteed to VCC = 1.0 V
• Low 1.0 µA Supply Current
V
CC
3
• VCC Transient Immunity
• Small SOT-23 Package
RESET
2
• No External Components
• Wide Operating Temperature: -40°C to 105°C
SOT-23*
(Top View)
Typical Applications
NOTE: *SOT-23 is equivalent to JEDEC (TO-236)
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical µP Power Supply Monitoring
ORDERING INFORMATION
Device
Package
Shipping
NCP803SNxxxT1 SOT-23
3000/Tape & Reel
V
CC
NOTE: The “xxx” denotes a suffix for V voltage threshold
cc
options - see page 6 for more details.
V
CC
V
CC
R
pull- up
NCP803
RESET
µP
RESET
C = 100 nF
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
GND
GND
0
0
Figure 1. Typical Application Diagram
Semiconductor Components Industries, LLC, 2003
1
Publication Order Number:
May, 2003 - Rev. 4
NCP803/D
NCP803
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 240 msec (typ.)
CC
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* (Note 1)
Rating
Symbol
V
Value
Unit
V
Supply Voltage (V to GND)
6.0
CC
CC
RESET
-0.3 to (V + 0.3)
V
CC
Input Current, V
20
20
mA
mA
V/µsec
°C/W
°C
CC
Output Current, RESET
dV/dt (V
)
100
CC
Thermal Resistance, Junction to Air
Operating Temperature Range
Storage Temperature Range
R
491
q
JA
T
-40 to +105
-65 to +150
+260
A
T
°C
stg
Lead Temperature (Soldering, 10 Seconds)
Latch-up performance:
T
°C
sol
I
mA
Latch- up
Negative
150
*Maximum Ratings are those values beyond which damage to the device may occur.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 4000 V per MIL-STD-883, Method 3015.
Machine Model Method 400 V.
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
NCP803
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
1.0
1.2
-
-
5.5
5.5
A
T
= -40°C to +105°C
A
Supply Current
I
µA
CC
V
CC
= 3.3 V
T
= -40°C to +85°C
-
-
0.5
-
1.2
2.0
A
T = 85°C to +105°C
A
V
CC
= 5.5 V
T
= -40°C to +85°C
-
-
0.8
-
1.8
2.5
A
T = 85°C to +105°C
A
Reset Threshold (Note 4)
V
TH
V
NCP803SN463
T = +25°C
4.56
4.51
4.39
4.63
-
-
4.70
4.75
4.87
A
T
A
= -40°C to +85°C
T = +85°C to +105°C
A
NCP803SN438
T = +25°C
4.31
4.27
4.16
4.38
-
-
4.45
4.49
4.60
A
T
A
= -40°C to +85°C
T = +85°C to +105°C
A
NCP803SN308
T = +25°C
3.04
3.00
2.92
3.08
-
-
3.11
3.15
3.23
A
T
A
= -40°C to +85°C
T = +85°C to +105°C
A
NCP803SN293
T = +25°C
2.89
2.85
2.78
2.93
-
-
2.96
3.00
3.08
A
T
A
= -40°C to +85°C
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
A
= -40°C to +85°C
T = +85°C to +105°C
A
NCP803SN232
T = +25°C
2.29
2.26
2.20
2.32
-
-
2.35
2.38
2.44
A
T
A
= -40°C to +85°C
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
A
= -40°C to +85°C
T = +85°C to +105°C
A
Reset Temperature Coefficient
-
30
10
240
-
-
ppm/°C
µsec
msec
V
V
CC
to Reset Delay V = V to (V - 100 mV)
-
140
-
-
CC
TH
TH
Reset Active Timeout Period
RESET Output Voltage Low
460
0.3
V
OL
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
I
-
-
1
µA
LEAK
V
u V , RESET De-asserted
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.
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3
NCP803
APPLICATIONS INFORMATION
VCC Transient Rejection
Processors With Bidirectional I/O Pins
The NCP803 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 2 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 µs or
less will not cause a reset pulse. Transient immunity can be
improved by adding a capacitor in close proximity to the VCC
pin.
Some µP’s (such as Motorola 68HC11) have
bi-directional reset pins which interface easily with the
Open Drain RESET output of the NCP803. As shown in
Figure 3, one can connect directly to the RESET output of
the NCP803 to the RESET pin of the µP. The pull-up resistor
avoids an undetermined voltage of the RESET pin.
V
CC
R
V
CC
V
CC
pull- up
NCP803
RESET
GND
µP
C = 100 nF
RESET
V
CC
GND
V
TH
0
0
Overdrive
Figure 3. Interfacing to Bidirectional Reset I/O
NCP803 RESET Output Allows Use With Two Power
Supplies
Duration
In numerous applications the pull-up resistor placed 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 µP. However, if the
NCP803’s supply goes below 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
300
250
200
150
100
V
TH
= 4.9 V
level. This occurs at a VCC level that depends on the R
value and the voltage to which it is connected.
pull- up
V
TH
= 3.08 V
V
= 1.6 V
TH
50
0
+3.3 V
+5.0 V
10
20
30
40
50
60
70
80
90 100
RESET COMPARATOR OVERDRIVE (mV)
R
V
CC
V
CC
pull- up
Figure 2. Maximum Transient Duration vs. Overdrive
NCP803
µP
RESET
GND
for Glitch Rejection at 25°C
C = 100 nF
RESET
GND
0
0
Figure 4. RESET Output with Two Power Supplies
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4
NCP803
TYPICAL CHARACTERISTICS
1.8
1.4
105°C
85°C
V
TH
= 1.60 V
V
TH
= 3.08 V
1.6
1.4
1.2
1.0
1.2
1.0
0.8
0.6
0.4
0.2
105°C
85°C
25°C
25°C
0.8
0.6
0.4
0.2
0
0°C
0°C
-40 °C
-40 °C
0
0.5
1.5
2.5
3.5
4.5
5.5
0.5
1.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Figure 5. Supply Current vs. Supply Voltage
Figure 6. Supply Current vs. Supply Voltage
1.001
1.6
1.4
1.2
1.0
105°C
V
TH
= 1.60 V
1.000
0.999
0.998
0.997
0.996
0.995
0.994
V
TH
= 4.90 V
V
TH
= 3.08 V
85°C
25°C
V
TH
= 4.90 V
0.8
0°C
0.6
0.4
-40 °C
0.2
0
0.993
-40
0.5
1.5
2.5
3.5
4.5
5.5
-20
0
20
40
60
80
100 120
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
Figure 7. Supply Current vs. Supply Voltage
Figure 8. Normalized Reset Threshold Voltage
vs. Temperature
280
350
300
250
200
150
100
50
270
260
250
240
230
220
210
V
TH
= 4.90 V
V
= 4.90 V
TH
V
V
= 3.08 V
= 1.60 V
TH
V
TH
= 3.08 V
TH
V
= 1.60 V
0
TH
200
-40
0
-40
-20
0
20
40
60
80
100 120
-20
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 9. Power-up Reset Timeout vs. Temperature
Figure 10. Power-down Reset Timeout vs.
Temperature (Overdrive = 20 mV)
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5
NCP803
TAPING FORM
Component Taping Orientation for 3L SOT-23 (JEDEC-236) Devices
USER DIRECTION OF FEED
DEVICE
MARKING
PIN 1
Standard Reel Component Orientation
(Mark Right Side Up)
Tape & Reel Specifications Table
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-23
8 mm
4 mm
3000
7 inches
MARKING AND THRESHOLD INFORMATION
ON Semiconductor Part #
NCP803SN160T1
V
*
Marking (Note 5)
SCQM
TH
1.60
2.32
2.63
2.93
3.08
4.38
4.63
NCP803SN232T1
SQRM
NCP803SN263T1
SQCM
NCP803SN293T1
SQDM
NCP803SN308T1
SQEM
NCP803SN438T1
SQFM
NCP803SN463T1
SQGM
*Contact your ON Semiconductor sales representative for other threshold voltage options.
5. M = Monthly Date Code
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6
NCP803
PACKAGE DIMENSIONS
SOT-23
PLASTIC PACKAGE (TO-236)
CASE 318-08
ISSUE AH
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.
A
L
3
S
4. 318−03 AND −07 OBSOLETE, NEW STANDARD
318−08.
B
1
2
INCHES
DIM MIN MAX
MILLIMETERS
MIN
2.80
1.20
0.89
0.37
1.78
MAX
3.04
1.40
1.11
V
G
A
B
C
D
G
H
J
0.1102 0.1197
0.0472 0.0551
0.0350 0.0440
0.0150 0.0200
0.0701 0.0807
0.50
2.04
0.100
0.177
0.69
1.02
2.64
0.60
0.0005 0.0040 0.013
0.0034 0.0070 0.085
C
K
L
0.0140 0.0285
0.0350 0.0401
0.0830 0.1039
0.0177 0.0236
0.35
0.89
2.10
0.45
S
V
H
J
D
K
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7
NCP803
SENSEFET is a trademark of Semiconductor Components Industries, LLC.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make
changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death
may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
Literature Fulfillment:
JAPAN: ON Semiconductor, Japan Customer Focus Center
2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051
Phone: 81-3-5773-3850
Literature Distribution Center for ON Semiconductor
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Email: ONlit@hibbertco.com
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For additional information, please contact your local
Sales Representative.
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NCP803/D
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