MAX803 Series, NCP803 Series. Very Low Supply Current 3-Pin Microprocessor Reset Monitor

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1 MAX8 Series, NCP8 Series Very Low Supply Current -Pin Microprocessor Reset Monitor The MAX8/NCP8 is a costeffective system supervisor circuit designed to monitor 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 1 sec of falling through the reset voltage threshold. Reset is maintained active for a timeout period which is trimmed by the factory after rises above the reset threshold. The MAX8/NCP8 has an open drain activelow output. Both devices are available in SOT2 and SC7 packages. The MAX8/NCP8 is optimized to reject fast transient glitches on the line. Low supply current of.5 A ( =.2 V) make these devices suitable for battery powered applications. Features Precision Monitor for 1.5 V, 2.5 V,. V,. V, and 5. V Supplies Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 1 mv Steps Four Guaranteed Minimum PowerOn Reset Pulse Width Available (1 ms, 2 ms, 1 ms, and 14 ms) Output Guaranteed to = 1. V Low Supply Current Transient Immunity No External Components Wide Operating Temperature: 4 C to 15 C These Devices are PbFree and are RoHS Compliant Typical Applications Computers Embedded Systems Battery Powered Equipment Critical Microprocessor Power Supply Monitoring 1 2 xxx M SOT2 (TO26) CASE 18 PIN CONFIGURATION 1 2 SC7 (SOT2) CASE 419 SOT2/SC7 (Top View) MARKING DIAGRAM 1 2 = Specific Device Code = Date Code = PbFree Package xxx M xx M (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. 1 C = 1 nf MAX8 NCP8 R pullup P DEVICE MARKING INFORMATION See general marking information in the device marking section on page 8 of this data sheet. Figure 1. Typical Application Diagram Semiconductor Components Industries, LLC, 215 August, 215 Rev. 9 1 Publication Order Number: MAX8/D

2 MAX8 Series, NCP8 Series Timeout Counter Oscillator 2 Vref 1 Figure 2. NCP8, MAX8 Series OpenDrain ActiveLow Output PIN DESCRIPTION Pin No. Symbol Description ÁÁÁÁÁÁÁÁÁÁ 1 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Ground ÁÁÁÁ 2 ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ output remains low while is below the reset voltage threshold, and for a reset timeout ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ period after rises above reset threshold. ÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply Voltage: C = 1 nf is recommended as a bypass capacitor between and. ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ABSOLUTE MAXIMUM RATINGS Rating Symbol Value Unit Power Supply Voltage ( to ). to 6. V Output Voltage (CMOS). to ( +.) V Input Current, 2 ma Output Current, 2 ma dv/dt ( ) 1 V/ sec Thermal Resistance, JunctiontoAir (Note 1) SOT2 SC7 R JA 1 14 Operating Junction Temperature Range T J 4 to +125 C Storage Temperature Range T stg 65 to +15 C Lead Temperature (Soldering, 1 Seconds) T sol +26 C C/W ESD Protection Human Body Model (HBM): Following Specification JESD22A114 Machine Model (MM): Following Specification JESD22A V Latchup Current Maximum Rating: Following Specification JESD78 Class II Positive Negative I Latchup 2 2 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. This based on a 5x5x1.6mm FR4 PCB with 1mm 2 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. PD T J(max) TA with T J(max) = 15 C R JA ma 2

3 MAX8 Series, NCP8 Series ELECTRICAL CHARACTERISTICS T A = 4 C to +15 C unless otherwise noted. Typical values are at. (Note ) Characteristic Symbol Min Typ Max Unit Range V T A = C to +7 C T A = 4 C to +15 C (Note 4) Supply Current =. V T A = 4 C to +85 C T A = 85 C to +15 C (Note 5) = 5.5 V T A = 4 C to +85 C T A = 85 C to +15 C (Note 5) Reset Threshold (V in Decreasing) (Note 6) MAX8SQ46/NCP8SN46 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) MAX8SQ48/NCP8SN48 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) NCP8SN4 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) MAX8SQ8/NCP8SN8 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) MAX8SQ29/NCP8SN29 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) NCP8SN26 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) NCP8SN22 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) NCP8SN16 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) MAX8SN12, MAX8SQ12 T A = 4 C to +85 C T A = +85 C to +15 C (Note 5) I CC V TH t Detector Voltage Threshold Temperature Coefficient ppm/ C to Reset Delay = V TH to (V TH 1 mv) 1 sec Reset Active TimeOut Period (Note 6) msec MAX8SN(Q)29D1 MAX8SN(Q)29D2/MAX8SN(Q)8D2 MAX8SN(Q)29D MAX8SN(Q)29 RP Output Voltage Low = V TH.2 V 1.6 V V TH 2. V, I SINK =.5 ma 2.1 V V TH 4. V, I SINK = 1.2 ma 4.1 V V TH 4.9 V, I SINK =.2 ma V OL. V Leakage Current V TH, Deasserted I LEAK 1 A. Production testing done at T A = 25 C, over temperature limits guaranteed by design. 4. For NCV automotive devices, this temperature range is T A = 4 C to +125 C. 5. For NCV automotive devices, this temperature range is T A = +85 C to +125 C. 6. Contact your ON Semiconductor sales representative for other threshold voltage and timeout options A V

4 MAX8 Series, NCP8 Series TYPICAL OPERATING CHARACTERISTICS SUPPLY CURRENT ( A) V TH = 1.2 V 85 C 25 C 4 C SUPPLY CURRENT ( A) V TH = 4.6 V 85 C 25 C 4 C SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Figure. Supply Current vs. Supply Voltage Figure 4. Supply Current vs. Supply Voltage SUPPLY CURRENT ( A) V 85 C TH = 2.9 V 25 C 4 C NORMALIZED THRESHOLD VOLTAGE V TH = 4.6 V V TH = 1.2 V SUPPLY VOLTAGE (V) Figure 5. Supply Current vs. Supply Voltage TEMPERATURE ( C) Figure 6. Normalized Reset Threshold Voltage vs. Temperature SUPPLY CURRENT ( A) = 5. V =. V = 1. V OUTPUT VOLTAGE (mv) V TH = 4.6 V I SINK = 5 A ASSERTED 85 C 25 C 4 C TEMPERATURE ( C) Figure 7. Supply Current vs. Temperature SUPPLY VOLTAGE (V) Figure 8. Output Voltage Low vs. Supply Voltage 4

5 MAX8 Series, NCP8 Series POWERDOWN DELAY ( sec) V OD = 2 mv V OD = 1 mv V OD = 1 mv TYPICAL OPERATING CHARACTERISTICS V OD = V TH V OD = 2 mv V OD = 2 mv TEMPERATURE ( C) TEMPERATURE ( C) Figure 9. PowerDown Reset Delay vs. Temperature and Overdrive (V TH = 1.2 V) POWERDOWN DELAY ( sec) V OD = 1 mv V OD = 2 mv V OD = 1 mv V OD = V TH Figure 1. PowerDown Reset Delay vs. Temperature and Overdrive (V TH = 4.6 V) NORMALIZED POWERUP TIMEOUT TEMPERATURE ( C) Figure 11. Normalized PowerUp Reset vs. Temperature 5

6 MAX8 Series, NCP8 Series Detail Operation Description The MAX8, NCP8 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 is at a nominal level greater than the voltage detector upper threshold (VTH). And the () output voltage (Pin 2) will be in the high state for MAX8 and NCP8 devices. If there is an input power interruption and becomes significantly deficient, it will fall below the lower detector threshold (V TH ). This event causes the output to be in the low state for the MAX8 and NCP8 devices. After completion of the power interruption, will rise to its nominal level and become greater than the V TH. 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. Input Voltage V TH+ V TH Reset Output MAX8, NCP8 V TH V Reset Output MAX81 V TH V t RP Figure 12. Timing Waveforms 6

7 MAX8 Series, NCP8 Series APPLICATIONS INFORMATION Transient Rejection The MAX8/NCP8 series provides accurate monitoring and reset timing during powerup, powerdown, and brownout/sag conditions, and rejects negativegoing transients (glitches) on the power supply line. Figure 1 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 powerdown. Typically, transient that goes 1 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 pin of the MAX8. the NCP8/MAX8 has OpenDrain and activelow output, it typically uses a pullup resistor. With this device, will most likely not maintain an active condition, but will drift to a nonactive level due to the pullup resistor and the reduced sinking capability of the opendrain device. Therefore, this device is not recommended for applications where the pin is required to be valid down to = V. MAX89 NCP8 R1 1 k* V TH Overdrive *Assume HighZ Reset Input to Microprocessor MAXIMUM TRANSIENT DURATION ( sec) Duration V TH = 4.6 V V TH = 1.2 V COMPARATOR OVERDRIVE (mv) 41 Figure 14. Signal Integrity MAX8 Output Allows Use With Two Power Supplies In numerous applications the pullup resistor place on the output is connected to the supply voltage monitored by the IC. Nevertheless, a different supply voltage can also power this output and so levelshift from the monitored supply to reset the microprocessor. However, if the NCP8/MAX8 s supply goes blew 1 V, the 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 level that depends on the R pullup value and the voltage which is connected. 1 2 Figure 1. Maximum Transient Duration vs. Overdrive for Glitch Rejection at 25 C Signal Integrity During PowerDown The MAX8/NCP8 output is valid to = 1. 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 must be maintained valid to = V, since V R CC pullup MAX8 Microprocessor NCP8 Figure 15. MAX8 Output with Two Supplies 7

8 MAX8 Series, NCP8 Series ORDERING, MARKING AND THRESHOLD INFORMATION Vth** Part Number (V) NCP8SN16T1G Time out*** (ms) Description Marking Package Shipping NCP8SN29DT1G SSZ SOT2 Open Drain (PbFree) SCQ SOT2 (PbFree) NCP8SN22T1G SQR SOT2 (PbFree) NCP8SN26T1G SQC SOT2 (PbFree) NCP8SN29T1G SQD SOT2 (PbFree) NCP8SN8T1G SQE SOT2 (PbFree) NCP8SN4T1G RAD SOT2 (PbFree) NCP8SN48T1G SQF SOT2 (PbFree) NCP8SN46T1G SQG SOT2 (PbFree) NCP8SN12T1G SSW SOT2 (PbFree) NCP8SN29D1T1G SSX SOT2 (PbFree) NCP8SN29D2T1G SSY SOT2 (PbFree) MAX8SQ12T1G ZV SC7 (PbFree) MAX8SQ26T1G SX SC7 (PbFree) MAX8SQ29T1G ZW SC7 (PbFree) MAX8SQ8T1G ZX SC7 NCV8SQ8T1G* 1446 ZA (PbFree) MAX8SQ48T1G ZY SC7 (PbFree) MAX8SQ46T1G ZZ SC7 (PbFree) MAX8SQ29D1T1G YA SC7 (PbFree) MAX8SQ29D2T1G YB SC7 (PbFree) MAX8SQ8D2T1G SY SC7 NCV8SQ8D2T1G* 266 CY (PbFree) MAX8SQ29DT1G YC SC7 (PbFree) NCP8SN29TG SQD SOT2 (PbFree) / Tape & Reel 1 / Tape & Reel *NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AECQ1 Qualified and PPAP Capable. **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. 8

9 MAX8 Series, NCP8 Series PACKAGE DIMENSIONS SOT2 (TO26) CASE 188 ISSUE AP A E A1 D 1 2 e b HE SEE VIEW C L1 L c.25 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, CONTROLLING DIMENSION: INCH.. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. 4. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. MILLIMETERS INCHES DIM MIN NOM MAX MIN NOM MAX A A b c D E e L L H E VIEW C SOLDERING FOOTPRINT SCALE 1:1 mm inches 9

10 MAX8 Series, NCP8 Series PACKAGE DIMENSIONS SC7 (SOT2) CASE 4194 ISSUE N D e1 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, CONTROLLING DIMENSION: INCH. H E 1 2 e E b MILLIMETERS INCHES DIM MIN NOM MAX MIN NOM MAX A A A2.7 REF.28 REF b c D E e e1.65 BSC.26 BSC L H E A A2 c.5 (.2) A1 L SOLDERING FOOTPRINT* SCALE 1:1 mm inches *For additional information on our PbFree strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC s product/patent coverage may be accessed at /site/pdf/patentmarking.pdf. 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 LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor E. 2nd Pkwy, Aurora, Colorado 811 USA Phone: or Toll Free USA/Canada Fax: or Toll Free USA/Canada orderlit@onsemi.com N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative MAX8/D