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| Back 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 sec 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. The NCP803 is optimized to reject fast transient glitches on the VCC line. Low supply current of 1.0 A (VCC = 3.2 V) make this device suitable for battery powered applications. Features http://onsemi.com MARKING DIAGRAM 3 1 2 3 SOT-23 (TO-236) CASE 318 1 xxx = Specific Device Code M = Monthly Date Code xxxM 2 * 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 140 msec Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to VCC = 1.0 V Low 1.0 A Supply Current VCC Transient Immunity Small SOT-23 Package No External Components Wide Operating Temperature: -40C to 105C Computers Embedded Systems Battery Powered Equipment Critical P Power Supply Monitoring VCC VCC NCP803 C = 100 nF RESET GND 0 VCC P RESET GND 0 PIN CONFIGURATION GND 1 3 VCC RESET 2 SOT-23* (Top View) Typical Applications NOTE: *SOT-23 is equivalent to JEDEC (TO-236) ORDERING INFORMATION Device NCP803SNxxxT1 Package SOT-23 Shipping 3000/Tape & Reel NOTE: The "xxx" denotes a suffix for Vcc voltage threshold options - see page 6 for more details. Rpull-up DEVICE MARKING INFORMATION See general marking information in the device marking section on page 6 of this data sheet. Figure 1. Typical Application Diagram (c) Semiconductor Components Industries, LLC, 2002 1 January, 2002 - Rev. 2 Publication Order Number: NCP803/D NCP803 ABSOLUTE MAXIMUM RATINGS* (Note 1) Rating Supply Voltage (VCC to GND) RESET Input Current, VCC Output Current, RESET dV/dt (VCC) Thermal Resistance, Junction to Air Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Seconds) Latch-up performance: Negative *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. TJ(max) * TA with TJ(max) = 150C PD + RqJA RqJA TA Tstg Tsol ILatch-up 150 Symbol VCC Value 6.0 -0.3 to (VCC + 0.3) 20 20 100 491 -40 to +105 -65 to +150 +260 Unit V V mA mA V/sec C/W C C C mA 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 (Note 4) NCP803SN308 TA = +25C TA = -40C to +85C TA = +85C to +105C NCP803SN293 TA = +25C TA = -40C to +85C TA = +85C to +105C ICC - - - - VTH 3.04 3.00 2.92 2.89 2.85 2.78 3.08 - - 2.93 - - 2.63 - - 3.11 3.15 3.23 2.96 3.00 3.08 2.66 2.70 2.76 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 A Unit V NCP803SN263 2.59 TA = +25C 2.55 TA = -40C to +85C 2.50 TA = +85C to +105C 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. http://onsemi.com 2 NCP803 ELECTRICAL CHARACTERISTICS (continued) TA = -40C to +105C unless otherwise noted. Typical values are at TA = +25C. (Note 5) Characteristic Reset Temperature Coefficient VCC to Reset Delay VCC = VTH to (VTH - 100 mV) Reset Active Timeout Period 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 VOL Symbol Min - - 140 - Typ 30 10 240 - Max - - 460 0.3 Unit ppm/C sec msec V ILEAK - - 1 A 5. Production testing done at TA = 25C, over temperature limits guaranteed by design. PIN DESCRIPTION Pin No. 1 2 3 Symbol GND Ground Description AAAAAAAAAAAAAAAAAAAAAAAA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A AAAAAAAAAAAAAAAAAAAAAAAA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAA AAAA RESET VCC RESET output remains low while VCC is below the reset voltage threshold, and for 240 msec (typ.) after VCC rises above reset threshold. Supply Voltage: C = 100 nF is recommended as a bypass capacitor between VCC and GND. http://onsemi.com 3 NCP803 APPLICATIONS INFORMATION VCC Transient Rejection 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 s or less will not cause a reset pulse. Transient immunity can be improved by adding a capacitor in close proximity to the VCC pin. VCC VTH Overdrive Some P'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 P. The pull-up resistor avoids an undetermined voltage of the RESET pin. VCC VCC NCP803 C = 100 nF RESET GND 0 RESET GND 0 Rpull-up VCC P Processors With Bidirectional I/O Pins Figure 3. Interfacing to Bidirectional Reset I/O Duration MAXIMUM TRANSIENT DURATION (s) I 300 250 200 150 100 50 0 10 VTH = 4.9 V NCP803 RESET Output Allows Use With Two Power Supplies VTH = 3.08 V VTH = 1.6 V 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 P. 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 level. This occurs at a VCC level that depends on the Rpull-up value and the voltage to which it is connected. +3.3 V +5.0 V 20 30 40 50 60 70 80 90 100 VCC NCP803 C = 100 nF RESET GND 0 RESET GND 0 Rpull-up VCC P RESET COMPARATOR OVERDRIVE (mV) Figure 2. Maximum Transient Duration vs. Overdrive for Glitch Rejection at 25C Figure 4. RESET Output with Two Power Supplies http://onsemi.com 4 NCP803 TYPICAL CHARACTERISTICS 1.8 1.6 SUPPLY CURRENT (mA) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0.5 1.5 2.5 3.5 4.5 5.5 25C 0C -40C 85C VTH = 1.60 V 105C 1.4 1.2 SUPPLY CURRENT (mA) 1.0 0.8 0.6 0.4 0.2 0 0.5 VTH = 3.08 V 105C 85C 25C 0C -40C 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 1.6 1.4 SUPPLY CURRENT (mA) 1.2 1.0 0.8 0.6 0.4 -40C 0.2 0 0.5 1.5 2.5 3.5 4.5 5.5 0C 25C 85C VTH = 4.90 V 105C 1.001 NORMALIZED VTH VOLTAGE 1.000 V = 3.08 V 0.999 TH 0.998 0.997 0.996 0.995 0.994 -20 0 20 40 60 80 100 120 VTH = 4.90 V VTH = 1.60 V 0.993 -40 SUPPLY VOLTAGE (V) TEMPERATURE (C) Figure 7. Supply Current vs. Supply Voltage Figure 8. Normalized Reset Threshold Voltage vs. Temperature POWER-DOWN RESET TIMEOUT (mS) 350 300 250 200 150 100 50 0 -40 VTH = 1.60 V -20 0 20 40 60 80 100 VTH = 3.08 V VTH = 4.90 V 280 POWER-UP RESET TIMEOUT (mS) 270 260 250 240 230 220 210 200 -40 -20 0 20 40 60 80 100 120 VTH = 3.08 V VTH = 1.60 V VTH = 4.90 V TEMPERATURE (C) TEMPERATURE (C) Figure 9. Power-up Reset Timeout vs. Temperature Figure 10. Power-down Reset Timeout vs. Temperature (Overdrive = 20 mV) http://onsemi.com 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 SOT-23 Carrier Width (W) 8 mm Pitch (P) 4 mm Part Per Full Reel 3000 Reel Size 7 inches MARKING AND THRESHOLD INFORMATION ON Semiconductor Part # Semicond ctor NCP803SN263T1 NCP803SN293T1 NCP803SN308T1 VTH* 2.63 2.93 3.08 Marking (Note 6) SQCM SQDM SQEM *Contact your ON Semiconductor sales representative for other threshold voltage options. 6. M = Monthly Date Code http://onsemi.com 6 NCP803 PACKAGE DIMENSIONS SOT-23 PLASTIC PACKAGE (TO-236) CASE 318-08 ISSUE AH A L 3 1 2 BS 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. 318-03 AND -07 OBSOLETE, NEW STANDARD 318-08. DIM A B C D G H J K L S V INCHES MIN MAX 0.1102 0.1197 0.0472 0.0551 0.0350 0.0440 0.0150 0.0200 0.0701 0.0807 0.0005 0.0040 0.0034 0.0070 0.0140 0.0285 0.0350 0.0401 0.0830 0.1039 0.0177 0.0236 MILLIMETERS MIN MAX 2.80 3.04 1.20 1.40 0.89 1.11 0.37 0.50 1.78 2.04 0.013 0.100 0.085 0.177 0.35 0.69 0.89 1.02 2.10 2.64 0.45 0.60 V G C D H K J http://onsemi.com 7 NCP803 ON Semiconductor and are 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: 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: ONlit@hibbertco.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 NCP803/D |
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