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. http://onsemi.com 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 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 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 http://onsemi.com 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. http://onsemi.com 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 http://onsemi.com 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 http://onsemi.com 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 http://onsemi.com 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 http://onsemi.com 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. http://onsemi.com 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. http://onsemi.com 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 are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 http://onsemi.com 10 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative MAX803/D