NJU7706/07 VOLTAGE DETECTOR

Transcription

1 OLTAGE DETECTOR GENERAL DESCRIPTION The /07 is a high precision voltage detector with a built-in delay time generator of fixed time. The /07 is useful for preventing malfunction of microprocessor or DSP through monitoring power supply voltage. The delay function achieves set wait time when supply voltage is unstable. Moreover, the delay function can make a sequence that other devices in application work and stabilize before microcomputer or DSP works. The detection voltage is internally fixed with an accuracy of 1.0%, and three fixed delay times 50ms, 100ms and 200ms are available. Manual reset function can output reset signal irrespective of detection voltage. is Nch. Open Drain and is a C-MOS output type. Small packaging makes and suitable for space conscious applications. FEATURES High Precision Detection oltage ±1.0% Low Quiescent Current 1.3µA typ. Detection oltage Range (0.1 step) Delay Time(Built-in Fixed Type) 50ms /100ms /200ms(Built-in Fixed Type) ON/OFF switch of delay time( pin) Manual Reset Active L : NJU770*F**A Active "H" : NJU770*F**B Output Configuration : Nch. Open Drain type : C-MOS Output type Package Outline SOT-23-5 PACKAGE OUTLINE /07F PIN CONFIGURATION /07F PIN FUNCTION er

2 EQUIALENT CIRCUIT Delay Circuit Delay Circuit ref ref **A* **B* Delay Circuit Delay Circuit ref ref **A* **B* er

3 DETECTION OLTAGE RANK LIST Device Name DET Logic Delay Time NJU770*F25A1 2.5 NJU770*F26A1 2.6 NJU770*F27A1 2.7 NJU770*F28A1 2.8 Active L NJU770*F29A ms NJU770*F03A1 3.0 NJU770*F39A1 3.9 NJU770*F42A1 4.2 NJU770*F27B1 2.7 Active H NJU770*F15A2 1.5 NJU770*F18A2 1.8 NJU770*F19A2 1.9 NJU770*F21A2 2.1 NJU770*F22A2 2.2 NJU770*F25A2 2.5 NJU770*F27A2 2.7 NJU770*F28A2 2.8 NJU770*F29A2 2.9 NJU770*F03A2 3.0 Active L NJU770*F31A ms NJU770*F39A2 3.9 NJU770*F04A2 4.0 NJU770*F42A2 4.2 NJU770*F43A2 4.3 NJU770*F45A2 4.5 NJU770*F46A2 4.6 NJU770*F06A2 6.0 NJU770*F25B2 2.5 NJU770*F27B2 2.7 Active H NJU770*F42B2 4.2 NJU770*F27A3 2.7 NJU770*F39A3 3.9 Active L NJU770*F42A ms NJU770*F27B3 2.7 Active H er

4 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL RATINGS UNIT Input oltage +10 Output oltage Input oltage of pin Input oltage of pin Output Current I OUT 50 ma Power Dissipation P D SOT (*1) 200(*2) mw Operating Temperature Topr C Storage Temperature Tstg C (*1) : Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) (*2) : Device itself ELECTRICAL CHARACTERISTICS (Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Detection oltage DET -1.0% +1.0% Hysteresis oltage HYS m Quiescent Current I SS = DET +1 DET = ersion DET = ersion µa Output Current I OUT Nch, DS =0.5 = =2.4 ( 2.7 ersion) ma Output Leak Current I LEAK = =9 0.1 µa Detection oltage Temperature Coefficient DET / Ta Ta=0 +85 C ±100 ppm/ C Delay Time 1 t d1 F*** ms = DET +1, F*** ms = L Level F*** ms Delay Time 2 t d2 = DET +1, = H Level µs Input oltage of _H 1.5 pin _L Input oltage of _H 1.5 pin (Active L ) _L Input oltage of _H -0.3 pin (Active H ) _L Impedance of pin R MΩ Operating oltage (*3) =100kΩ (*3): The minimum operating voltage( OPL ) indicates the same value of the input voltage( ) on condition that becomes 10% or less of the input voltage( ) er

5 TEST CIRCUIT Circuit Operating Current TEST CIRCUIT Detection voltage / Minimum operating voltage TEST CIRCUIT A Iss DET/ OPL pin Input voltage TEST CIRCUIT Leak current / Output current TEST CIRCUIT I LEAK / I OUT A / DS Delay time1 TEST CIRCUIT Delay time2 TEST CIRCUIT Oscilloscope Oscilloscope ch1 ch2 ch1 ch2 OUT er

6 TYPICAL APPLICATION 1 Power Supply Monitor Circuit ( line COMMON) Reset Signal INPUT Micro-Processor etc. 2 Power Supply Monitor Circuit ( line SEPARATE) 1 2 Reset Signal INPUT Micro-Processor etc er

7 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL RATINGS UNIT Input oltage +10 Output oltage Input oltage of pin Input oltage of pin Output Current I OUT 50 ma Power Dissipation P D SOT (*4) 200(*5) mw Operating Temperature Topr C Storage Temperature Tstg C (*4) : Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) (*5) : Device itself ELECTRICAL CHARACTERISTICS (Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Detection oltage DET -1.0% +1.0% Hysteresis oltage HYS m Quiescent Current I SS = DET +1 DET = ersion DET = ersion µa Nch, DS =0.5 = DD =2.4 ( 2.7 ersion) Output Current I =4.8 ( 3.9 ersion) OUT ma =6.0 Pch, DS = ( ersion) =8.4 ( 5.7 ersion) Detection oltage Temperature Coefficient DET / Ta Ta=0 +85 C ±100 ppm/ C Delay Time 1 t d1 F*** ms = DET +1, F*** ms = L Level F*** ms Delay Time 2 t d2 = DET +1, = H Level µs Input oltage of _H 1.5 pin _L Input oltage of _H 1.5 pin (Active L ) _L Input oltage of _H -0.3 pin (Active H ) _L Impedance of pin R MΩ Operating oltage (*6) =100kΩ (*6): The minimum operating voltage( OPL ) indicates the same value of the input voltage( ) on condition that becomes 10% or less of the input voltage( ). er

8 TEST CIRCUIT Circuit Operating Current TEST CIRCUIT Detection voltage TEST CIRCUIT A Iss DET Nch Output current TEST CIRCUIT Pch Output current TEST CIRCUIT DS I OUT A I OUT A DS pin Input voltage TEST CIRCUIT Minimum operating voltage TEST CIRCUIT OPL er

9 Delay time1 TEST CIRCUIT Delay time2 TEST CIRCUIT Oscilloscope Oscilloscope ch1 ch2 ch1 ch2 OUT TYPICAL APPLICATION 1 Power Supply Monitor Circuit (DD line COMMON) Reset Signal INPUT Micro-Processor etc. er

10 Functional Description (1) Basic operation Detection voltage ( DET) Supply voltage () Minimum operation voltage ( OPL) Output voltage () Hysteresis voltage ( HYS) Release voltage ( DET + HYS) (1) When supply voltage( ) drops below detection voltage( DET ), Output voltage( ) changes "H" to "L" to alert reset state. (2) The reset state is kept while is lower than release voltage. The release voltage is a sum of DET and Hysterisis voltage ( HYS ). Please refer to the (*7) below. (3) When becomes higher than the release voltage and reset release delay time fixed by internal is past, then changes from "L" to "H" to resume normal state. (*7) HYS is to avoid unstable state caused by rapid voltage change at nearby DET. Delay time (*8): C-MOS output product () : When less than OPL, is free of the shaded region. (2) Description of Manual Reset Reset signal can output independently with. Logic of Operation Active "L" = "L" => Reset "ON" Active "H" = "H" => Reset "ON" If Manual Reset is not required, please connect terminal as following. Logic of Connection Active "L" Connect terminal to or open Active "H" Connect terminal to GND or open [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights er