M51981ML RENESAS | Alldatasheet
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Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp. The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices and power devices. Renesas Technology Corp. Customer Support Dept. April 1, 2003 7tENESAS Renesas Technology Corp.
MITSUBISHI <Standard Linear ICs> VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES
DESCRIPTION
M51981 are semiconductor integrated circuits designed for PIN CONFIGURATION (TOP VIEW) detecting supply voltage and resetting all types of logic circuits such as CPUs. 3 OUTPUT They find extensive applications,including battery checking circuits, a level detecting circuit and waveform shaping circuit. fo) GND FEATURES 2 [7] SuPPLy * Few external parts. VOLTAGE * Low threshold operating voltage (Supply voltage to keep js, * Sudden change in power supply has minimal effect on the ICs a * Wide application range 2 APPLICATION & * Reset pulse generation for almost all logic circuits * Battery checking, level detecting, waveform shaping circuits (1) SUPPLY * Delayed waveform generator VOLTAGE * Switching circuit to a back-up power supply (2) GND * DC/DC converter (3) OUTPUT * Over voltage protection circuit RECOMMENDED OPERATING CONDITION (1) (2)(3) BLOCK DIAGRAM SUPPLY VOLTAGE i Rt (3) OUTPUT GND 1/3) 1999-8- 24 2ENESAS (17s)
MITSUBISHI <Standard Linear ICs> VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM SUPPLY hia ' Vs iW VOLTAGE ' 4 i O.67V] 7 tot OUTPUT ' STATE H L t OUTPUT UNDEFIND ABSOLUTE MAXINUM RATINGS (Ta=25°C Unless otherwise noted) Symbol Test condition Pic |SuppyVotage OT OC—C—SSC“‘<;<SStSStStt TU VY [sink OutputSink Curent [Cd TCS | [Vo |OutputVotage _—*| ‘Oulputwithconstantcurentioad || ‘pat 700 [Pt [Poweroissosion Fcsoray | 500 mw K , , are | Topr_|Operating Temperature [SSCSC=*d "30 10 85 [Tstg [Storage Temperature | A010 +125 ELECTRICAL CHARACTERISTICS (Ta=25°C, Unless otherwise noted) Parameter Symbol| Parameter | Teetieoncition il [Vs [Detecting Vonage 20440 4.60 | [Avs _|FysterisisVotage——[ CCSCSCSCSCSC~dSS | | 80 mV Detecting Voltage Vs/AT | Temperature Coefficient 0.01 %IrC [icc |CroutGurent vom SSC~C~—~idSC YO | Vsat_ |Output Saturation Voltage | Voc=aviisinksama SST S| 2 | 04 | V | Pt |Operating Voltage for'Coperaton [ri=tookn,vsatso.av{ —— | 085 | 07 | © Pion foupatestage Curent | ro Toa] [TPH acation beray Time [Response time when Veo changesHtot | —— | ¢ | —— | 2/3) 1999-8- 24 stENESAS ( )
MITSUBISHI <Standard Linear ICs> VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES Example of application circuit Reset Circuit of M51981 Vcc SUPPLY SUPPLY OUTPUT Note 1. The logic circuit preferably should not have a pull-down resistor,but if one is prese- nt,add load resistor RL to overcome the pull- down resistor. 1999-8- 24 7tENESAS (37/3)