NCP304A Voltage Detector Series The NCP304A is a second generation ultra−low current voltage detector. This device is specifically designed for use as a reset controller in portable microprocessor based systems where extended battery life is paramount. This device features a highly accurate undervoltage detector with hysteresis which prevents erratic system reset operation as the comparator threshold is crossed. The NCP304A consists of complementary output devices that are available with either an active high or active low reset output. The NCP304A is available in the SC−82AB package with standard undervoltage thresholds. Additional thresholds that range from 0.9 V to 4.9 V in 100 mV steps can be manufactured. http://onsemi.com 4 1 SC−82AB SQ SUFFIX CASE 419C Features • • • • • • Quiescent Current of 1.0 mA Typical High Accuracy Undervoltage Threshold of 2.0% Wide Operating Voltage Range of 0.8 V to 10 V Complementary Output Active Low or Active High Reset Output This is a Pb−Free Device PIN CONNECTIONS AND MARKING DIAGRAM Vin 3 Reset Output SUD M G G Typical Applications • • • • 4 NC Microprocessor Reset Controller Low Battery Detection Power Fail Indicator Battery Backup Detection 1 2 GND (Top View) SUD = Specific Device Code M = Date Code G = Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the ordering information section on page 5 of this data sheet. NCP304ALSQxxT1 Complementary Output Configuration Input 4 * Vref 3 2 Reset Output GND This device contains 38 active transistors. *The representative block diagram depicts active low reset output ‘L’ suffix devices. The comparator input is interchanged for the active high output ‘H’ suffix devices. Figure 1. Representative Block Diagrams © Semiconductor Components Industries, LLC, 2008 September, 2008 − Rev. 1 1 Publication Order Number: NCP304A/D NCP304A MAXIMUM RATINGS (Note 1) Rating Input Power Supply Voltage (Pin 4) Symbol Value Unit Vin 12 V Output Voltage (Pin 3) Complementary, NCP304A VOUT Output Current (Pin 3) (Note 2) IOUT 70 mA Thermal Resistance, Junction−to−Air RqJA 285 °C/W Maximum Junction Temperature TJ +125 °C Storage Temperature Range Tstg −55 to +150 °C Latchup Performance (Note 3) Positive Negative V −0.3 to Vin+0.3 ILATCHUP mA 500 170 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 device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883, Method 3015. Machine Model Method 200 V. 2. The maximum package power dissipation limit must not be exceeded. TJ(max)−TA PD + RqJA 3. Maximum Ratings per JEDEC standard JESD78. ELECTRICAL CHARACTERISTICS (For all values TA = 25°C, unless otherwise noted.) Symbol Min Typ Max Unit Detector Threshold (Pin 4, Vin Decreasing) VDET− 4.214 4.3 4.386 V Detector Threshold Hysteresis (Pin 4, Vin Increasing) VHYS 0.129 0.225 0.301 V − − − − 3.0 3.9 Characteristic NCP304A − 4.3 Supply Current (Pin 4) (Vin = 4.14 V) (Vin = 6.3 V) Iin mA Maximum Operating Voltage (Pin 4) Vin(max) − − 10 V Minimum Operating Voltage (Pin 4) (TA = −40°C to 85°C) Vin(min) − − 0.55 0.65 0.70 0.80 V Reset Output Current (Pin 3, Active Low ‘L’ Suffix Devices) IOUT mA N−Channel Sink Current, NCP304A (VOUT = 0.05 V, Vin = 0.70 V) (VOUT = 0.50 V, Vin = 1.5 V) 0.01 1.0 0.05 2.0 − − P−Channel Source Current, NCP304A (VOUT = 5.9 V, Vin = 8.0 V) 1.5 3.0 − Reset Output Current (Pin 3, Active High ‘H’ Suffix Devices) IOUT N−Channel Sink Current, NCP304A (VOUT = 0.5 V, Vin = 5.0 V) P−Channel Source Current, NCP304A (VOUT = 0.4 V, Vin = 0.7 V) (VOUT = GND, Vin = 1.5 V) mA 6.3 11 − 0.011 0.525 0.04 0.6 − − Propagation Delay Input to Output (Figure 2) ms NCP304A Series Output Transition, High to Low (Note 4) Output Transition, Low to High (Note 4) tpHL tpLH − − 10 21 − 60 4. The time interval between the rising edge of VDD input pulse from 0.7 V to (+VDET) +2.0 V and output voltage level becoming to VDD/2. http://onsemi.com 2 NCP304A VDET+ + 2 Input Voltage, Pin 2 0.7 0V 5V Reset Output Voltage, Pin 1 2.5 V NCP305L Open Drain 0.5 V 0V VDET+ + 2 VDET+ + 2 2 Reset Output Voltage, Pin 1 NCP304AL Complementary 0.1 V 0V tpLH tpHL NCP304A is measured with a 10 pF capacitive load. The reset output voltage waveforms are shown for the active low ‘L’ devices. The upper detector threshold, VDET+ is the sum of the lower detector threshold, VDET− plus the input hysteresis, VHYS. Figure 2. Propagation Delay Measurement Conditions Table 1. NCP304A SERIES ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V Detector Threshold Vin Low Vin High Vin Low Vin High P−Channel Source Current VHYS (V) Iin (mA) (Note 5) Iin (mA) (Note 6) IOUT (mA) (Note 7) IOUT (mA) (Note 8) IOUT (mA) (Note 9) Typ Typ Typ VDET− (V) Part Number Min Typ Max Min Typ Max Typ Typ NCP304ALSQ43T1 4.214 4.3 4.386 0.129 0.215 0.301 1.1 1.3 5. 6. 7. 8. 9. N−Channel Sink Current Detector Threshold Hysteresis Supply Current Vin = VDET− − 0.16 V Condition 2: Vin = VDET− + 2.0 V Condition 3: Vin = 0.7 V, VOUT = 0.05 V, Active Low ‘L’ Suffix Devices Condition 4: Vin = 1.5 V, VOUT = 0.5 V, Active Low ‘L’ Suffix Devices Condition 5: Vin = 8.0 V, VOUT = 5.9 V, Active Low ‘L’ Suffix Devices http://onsemi.com 3 3.0 4.9 7.0 4.8 6.0 VOUT, OUTPUT OUTPUT (V) VDET, DETECTOR THRESHOLD VOLTAGE (V) NCP304A VDET+ 4.7 4.6 VDET− 4.5 4.4 4.3 −50 −25 0 25 75 50 4.0 3.0 2.0 TA = −30°C TA = 25°C TA = 85°C 1.0 0 100 TA, AMBIENT TEMPERATURE (°C) 2.0 4.0 3.0 Vin, INPUT VOLTAGE (V) Figure 3. NCP304A Series 4.5 V Detector Threshold Voltage vs. Temperature Figure 4. NCP304AL Series 4.5 V Reset Output Voltage vs. Input Voltage 2.0 0 1.0 5.0 6.0 IOUT, OUTPUT SINK CURRENT (mA) 12 TA = 25°C Iin, INPUT CURRENT (mA) 5.0 1.5 1.0 0.5 0 0 2.0 6.0 4.0 Vin, INPUT VOLTAGE (V) 8.0 10 10 TA = −30°C 8.0 TA = 25°C 6.0 TA = 85°C 4.0 2.0 0 0 1.0 2.0 3.0 4.0 5.0 Vin, INPUT VOLTAGE (V) Figure 5. NCP304A Series 4.5 V Input Current vs. Input Voltage Figure 6. NCP304AH Series 4.5 V Reset Output Sink Current vs. Input Voltage OPERATING DESCRIPTION The NCP304A is a second generation ultra−low current voltage detectors. Figures 7 and 8 show a timing diagram and a typical application. Initially consider that input voltage Vin is at a nominal level and it is greater than the voltage detector upper threshold (VDET+), and the reset output (Pin 3) will be in the high state for active low devices, or in the low state for active high devices. If there is a power interruption and Vin becomes significantly deficient, it will fall below the lower detector threshold (VDET−). This sequence of events causes the Reset output to be in the low state for active low devices, or in the high state for active high devices. After completion of the power interruption, Vin will again return to its nominal level and become greater than the VDET+. The voltage detector has built−in hysteresis to prevent erratic reset operation as the comparator threshold is crossed. Although this device is specifically designed for use as a reset controller in portable microprocessor based systems, it offers a cost−effective solution in numerous applications where precise voltage monitoring is required. http://onsemi.com 4 NCP304A Vin Input Voltage, Pin 2 VDET+ VDET− Vin Reset Output (Active Low), Pin 1 VDET+ VDET− 0V Vin Reset Output (Active High), Pin 1 VDET+ VDET− 0V Figure 7. Timing Waveforms APPLICATION CIRCUIT INFORMATION VDD 4 NCP304A Series 2 VDD Input * 3 Reset Reset Output Microprocessor * Required for GN D GND NCP305 Figure 8. Microprocessor Reset Circuit ORDERING INFORMATION Device Threshold Voltage Output Type NCP304ALSQ43T1G 4.3 CMOS Reset Marking Package Shipping† Active Low SUD SC−82AB (Pb−Free) 3000 / Tape & Reel NOTE: Additional active low threshold devices, ranging from 0.9 V to 4.9 V in 100 mV increments and NCP304A active high output devices, ranging from 0.9 V to 4.9 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability. †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. http://onsemi.com 5 NCP304A PACKAGE DIMENSIONS SC−82AB SQ SUFFIX CASE 419C−02 ISSUE E NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. 419C−01 OBSOLETE. NEW STANDARD IS 419C−02. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. A G C D 3 PL N 3 4 K B S 1 DIM A B C D F G H J K L N S 2 F L H J 0.05 (0.002) MILLIMETERS MIN MAX 1.8 2.2 1.15 1.35 0.8 1.1 0.2 0.4 0.3 0.5 1.1 1.5 0.0 0.1 0.10 0.26 0.1 −−− 0.05 BSC 0.2 REF 1.8 2.4 INCHES MIN MAX 0.071 0.087 0.045 0.053 0.031 0.043 0.008 0.016 0.012 0.020 0.043 0.059 0.000 0.004 0.004 0.010 0.004 −−− 0.002 BSC 0.008 REF 0.07 0.09 SOLDERING FOOTPRINT* 1.30 0.0512 0.65 0.026 0.95 0.037 0.90 0.035 0.70 0.028 1.90 0.075 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. 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. 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