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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.
Features http://onsemi.com 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 VCC 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 VCC = 1.0 V Low Supply Current VCC Transient Immunity No External Components Wide Operating Temperature: -40C to 105C Pb-Free Packages are Available Computers Embedded Systems Battery Powered Equipment Critical Microprocessor Power Supply Monitoring
VCC VCC C = 100 nF MAX803 NCP803 RESET GND 0 VCC Rpull-up P RESET GND 0
PIN CONFIGURATION
GND 1
3 2 SOT-23/SC-70 (Top View)
VCC
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
(c) 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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1 2 3 GND Ground RESET VCC 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.
Pin No.
Symbol
Description
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol VCC
Value
Unit V V mA mA
Power Supply Voltage (VCC to GND) RESET Output Voltage (CMOS) Input Current, VCC Output Current, RESET dV/dt (VCC) 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 (VCC + 0.3) 20 20 100
V/msec C/W C C C V
RqJA TJ Tstg Tsol
301 314 -40 to +105 -65 to +150 +260 2000 200
ILatchup 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 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) = 150C PD + RqJA
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MAX803 Series, NCP803 Series
ELECTRICAL CHARACTERISTICS TA = -40C to +105C unless otherwise noted. Typical values are at TA = +25C. (Note 3)
Characteristic VCC Range TA = 0C to +70C TA = -40C to +105C Supply Current VCC = 3.3 V TA = -40C to +85C TA = 85C to +105C VCC = 5.5 V TA = -40C to +85C TA = 85C to +105C Reset Threshold (Vin Decreasing) (Note 4) MAX803SQ463/NCP803SN463 TA = +25C TA = -40C to +85C TA = +85C to +105C MAX803SQ438/NCP803SN438 TA = +25C TA = -40C to +85C TA = +85C to +105C MAX803SQ308/NCP803SN308 TA = +25C TA = -40C to +85C TA = +85C to +105C MAX803SQ293/NCP803SN293 TA = +25C TA = -40C to +85C TA = +85C to +105C NCP803SN263 TA = +25C TA = -40C to +85C TA = +85C to +105C NCP803SN232 TA = +25C TA = -40C to +85C TA = +85C to +105C NCP803SN160 TA = +25C TA = -40C to +85C TA = +85C to +105C MAX803SN120, MAX803SQ120 TA = +25C TA = -40C to +85C TA = +85C to +105C 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)293D3 MAX803SN(Q)293 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 tRP 1.0 20 100 140 VOL - - - - - - 3.3 66 330 460 0.3 V ICC - - - - VTH 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
ILEAK
-
-
1
A
3. Production testing done at TA = 25C, 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 VTH = 1.2 V 0.6 SUPPLY CURRENT (mA) 0.5 25C 0.4 0.3 -40C 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) 85C 0.4 85C 25C 0.2 -40C 0.5 VTH = 4.63 V
0.3
0.1
Figure 2. Supply Current vs. Supply Voltage
Figure 3. Supply Current vs. Supply Voltage
VTH = 2.93 V SUPPLY CURRENT (mA) 0.3
85C
NORMALIZED THRESHOLD VOLTAGE
0.4
1.002 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
25C 0.2 -40C
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 VCC (mV) VTH = 4.63 V ISINK = 500 mA RESET ASSERTED
0.5
SUPPLY CURRENT (mA)
0.4 VCC = 5.0 V 0.3 VCC = 3.3 V 0.2 VCC = 1.0 V 0.1 0 -50
80
60 85C 40 25C 20 -40C 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) VOD = VCC-VTH 100 VOD = 10 mV 75 VOD = 20 mV VOD = 100 mV 25 VOD = 200 mV 0 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) POWER-DOWN RESET DELAY (msec) 125 300 VOD = 10 mV 240 VOD = VCC-VTH
180 VOD = 20 mV VOD = 100 mV 60 VOD = 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 (VTH = 1.2 V)
NORMALIZED POWER-UP RESET TIMEOUT
Figure 9. 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 10. Normalized Power-Up Reset vs. Temperature
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MAX803 Series, NCP803 Series
APPLICATIONS INFORMATION
VCC Transient Rejection
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 11 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
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.
VCC
VCC MAX809 NCP803 RESET
R1 100 k*
GND VTH Overdrive *Assume High-Z Reset Input to Microprocessor
Figure 12. RESET Signal Integrity
Duration MAXIMUM TRANSIENT DURATION (msec) 250
MAX803 RESET Output Allows Use With Two Power Supplies
200
150 VTH = 4.63 V 100 VTH = 1.2 V
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 the threshold level. This occurs at a VCC level that depends on the Rpullup value and the voltage which is connected.
VCC1 VCC2 360 410
0 10
60
110
160
210
260
310
RESET COMPARATOR OVERDRIVE (mV)
Figure 11. Maximum Transient Duration vs. Overdrive for Glitch Rejection at 25C RESET Signal Integrity During Power-Down
VCC MAX803 NCP803 RESET GND
Rpullup
VCC
Microprocessor
RESET GND
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
Figure 13. MAX803 RESET Output with Two Supplies
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MAX803 Series, NCP803 Series
ORDERING, MARKING AND THRESHOLD INFORMATION
Part Number NCP803SN160T1 NCP803SN160T1G NCP803SN232T1 NCP803SN232T1G NCP803SN263T1 NCP803SN263T1G NCP803SN293T1 NCP803SN293T1G NCP803SN308T1 NCP803SN308T1G NCP803SN438T1 NCP803SN438T1G NCP803SN463T1 NCP803SN463T1G NCP803SN120T1G NCP803SN293D1T1G NCP803SN293D2T1G NCP803SN293D3T1G MAX803SQ120T1G MAX803SQ293T1G MAX803SQ308T1G MAX803SQ438T1G MAX803SQ463T1G MAX803SQ293D1T1G MAX803SQ293D2T1G MAX803SQ293D3T1G Vth* (V) 1.60 1.60 2.32 2.32 2.63 2.63 2.93 2.93 3.08 3.08 4.38 4.38 4.63 4.63 1.20 2.93 2.93 2.93 1.20 2.93 3.08 4.38 4.63 2.93 2.93 2.93 Time out** (ms) 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 140-460 1-3.3 20-66 100-330 140-460 140-460 140-460 140-460 140-460 1-3.3 20-66 100-330 Open Drain RESET Description Marking SCQ SCQ SQR SQR SQC SQC SQD SQD SQE SQE SQF SQF SQG SQG SSW SSX SSY SSZ ZV ZW ZX ZY ZZ YA YB YC Package SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 SOT23-3 (Pb-Free) SOT23-3 (Pb-Free) SOT23-3 (Pb-Free) SOT23-3 (Pb-Free) SOT23-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) SC70-3 (Pb-Free) 3000 / Tape & Reel Shipping
For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *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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MAX803 Series, NCP803 Series
PACKAGE DIMENSIONS
SOT-23 (TO236) CASE 318-08 ISSUE AN
D
3 SEE VIEW C 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. DIM A A1 b c D E e L L1 HE 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 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
E
1 2
HE c b e q 0.25
A L A1 L1 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 inches
*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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MAX803 Series, NCP803 Series
PACKAGE DIMENSIONS
SC-70 (SOT-323) CASE 419-04 ISSUE M
D e1
3 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH.
HE
1 2
E
b e
A 0.05 (0.002)
A2 L
c
DIM A A1 A2 b c D E e e1 L HE
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
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 inches
*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 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. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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MAX803/D

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