M51943A 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 <Dig./Ana. INTERFACE> M5S1943A,B/M51944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES

DESCRIPTION

M51943A,B/M51944,,B are semiconductor integrated circuits PIN CONFIGURATION designed for detecting supply voltage and resetting all types of logic circuits such as CPUs. er They find extensive applications, including battery check- § S Falnc ing circuit, level detecting circuit and waveform shaping 2 = Bow circuit. a eote FEATURES © [1] surety voitace © Few external parts Outline SP5T ad © Low threshold operating voltage (Supply voltage to keep oa low-state at low supply voltage s< cee cece eee cesses + O.6V (TYP, at Ry = 22kQ S333 lo z= © Sudden change in power supply has minimal effect on the 202 suey z= ICs VOLTAGE © Wide application range Outline SOT-B9 © SIL package of the same height as DIP (5-pin SIP) © Extra small 3-pin package (3-pin FALT) surety VOLTAGE APPLICATION @eno ®O® Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and @outrut _. microcomputer, Reset of logic circuit, Battery check circuit, ine: NOLCONNECTION Outline TO-92L Switching circuit back-up voltage, Level detecting circuit, Waveform shaping circuit, Delay waveform generating circuit, DC-DC converter, Over voltage protection circuit. RECOMMENDED OPERATING CONDITION BLOCK DIAGRAM M51943A,B M51944A,B VOLTAGE A: Bulvin Load VOLTAGE A Buin Lod 8: Open Collector 8: Open Collector _=s a en 4 7 7 rd \\™ od a () ovteut (_) outeut [J _— GND GND 2tENESAS 1-7

MITSUBISHI <Dig./Ana. INTERFACE> M5 1943A,B/MS1944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM M51943A, BL M51944A, BL SUPPLY P a ‘SUPPLY VOLTAGE 0.65V F--~ VOLTAGE : : OUTPUT a OUTPUT 4 L Lt OUTPUT t t ABSOLUTE MAXIMUM RATINGS (Ta=257. unless otherwise noted) a SS a Yo Telit wilinge A Type (Output with constant current load) ioc ¥

8 Type Open eolecior cubu ee

a ELECTRICAL CHARACTERISTICS (ta=25°, unless otnermse noted) M5194440 M519448 cma oon Tama rm a st condtons " [Mn [tw | Mox_| [vs | Omwcing voinge PSs a fs || a [ vs/at | Dewcing vaage TenoortureCoefigent | CY P| — | | Lreset ype Minimum | AL=22kQ,Veuzoav| —~ | 0.67 | 0.8 | Ke suf voltae v ‘og | ee for ke operation FL=100k2,Vearso4v] — | 0.95 | 0.7 | Response tine when Voo changes WU P= pet — [| Propagation Deray Time Cie | Response te when Voo changes LH a ztENESAS 7-8

MITSUBISHI <Dig./Ana. INTERFACE> M5 1943A,B/M51944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES TYPICAL CHARACTERISTICS TYPICAL CHARACTERISTICS DETECTING VOLTAGE VS. THERMAL DERATING AMBIENT TEMPERATURE (MAXIMUM RATING) (Supply voltage detecting series) 1000, 434 ee eee eee € 800) i. "EA toe |] Pat eT TLE = 3

7 Saat 11 TTT I

B PRIX SPIN'SIP 2 a 40 SSC) Zaz & 5° a PERN 2 HH Bees PTT TTT ol 4.22 C) 23 50 7 100 125 —40 —20 0 20 40 60 80 100 AMBIENT TEMPERATURE Ta (°C) AMBIENT TEMPERATURE Ty (°C) THRESHOLD OPERATING VOLTAGE OUTPUT SATURATION VOLTAGE Vs. ([L] reset type) OUTPUT SINK CURRENT 1.0) S 0.3 B =z oe “ RESET TYPE :Voo=4V | a “TT TA aL ye | 8 \\' Ru=2.2kQ) Fa q < S gos aN ee ee | | LZ) Ved

7 TW] 4

° roy 0 oO 0.2 0.4 0.6 a8 1.0 ° 1 ri 3 4 5 6 SUPPLY VOLTAGE Veg (V) OUTPUT SINK CURRENT Isink (mA) OUTPUT LOAD CURRENT VS. CIRCUIT CURRENT VS. OUTPUT VOLTAGE AMBIENT TEMPERATURE (M519XXA) {M519438, M51944B) CTT 1.11 _ 3 s HET aot TT Pee ee : eee Tf pers Bf vere veowion vermis] = ot | oN Q -2 3 300] a g@ Ett ttt sot | | | eto eee ETT lee ia LEE Ty I ott] | TT | 0 4 8 12 16 —40 —20 o 20 40 60 80 100 OUTPUT VOLTAGE Vo (V) AMBIENT TEMPERATURE Ta (°C) ztENESAS

MITSUBISHI <Dig./Ana. INTERFACE> MS 1943A,B/M51944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES Ca EXAMPLE OF APPLICATION CIRCUIT Reset Circuit of M5194XX Series Veo SUPPLY ' SUPPLY © VOLTAGE gr © VOLTAGE babe olRESET(RESET) LOGIC CIRCUIT 6) OGNo Note 1. When the detecting supply voltage is 4.25V, Note 4. It is better to use the M5195XX series to cause a M51943 and M51944 are used. When the voltage is delay, but if the delay is caused by the M5194XxX series, anything except 4.25V, M51945 and M51946 are the delay capacitor Cd is applied between the output used. and GND. Note 2. If the M5194XX and the logic circuit share acom- Note 5. When the reset terminal in the logic circuit is of mon power source, type A (built-in load type) can be the low reset type, M51943 and M51945 are used and used whether a pull-up resister is included in the logic when the terminal is of the high reset type, M51944 and circuit or not. M51946 are used. Note 3. The logic circuit preferably should not have a Note 6. When a negative supply voltage is used, the supply pull-down resistor, but if one is present, add load resistor voltage side of M5194XX and the GND side are con- RL to overcome the pull-down resistor. nected to GND and the nagative supply voltage respec- tively. ee 2tENESAS 7-10