M51943A MITSUBISHI | Alldatasheet

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

DESCRIPTION

M51943A,B/M51944A,B are semiconductor integrated circuits PIN CONFIGURATION designed for detecting supply voltage and resetting all types of logic circuits such as CPUs. gg Blue They find extensive applications, including battery check- $ & fanc ing circuit, level detecting circuit and waveform shaping 3 = Blow circuit. 3 3 [2] nc FEATURES © [1] surpcy voitace © Few external parts Outline 5P5T ad @ Low threshold operating voltage (Supply voltage to keep oa low-state at low supply voltage << bcc eee eee nese esas O.6V (TYP,) at Ry = 22k2 S333 wre $F © Sudden change in power supply has minimal effect on the 2° 2° sure z= ICs VOLTAGE © Wide application range Outline SOT-89 © SIL package of the same height as DIP (5-pin SIP) © Extra small 3-pin package (3-pin FALT) surety VOLTAGE APPLICATION @sno octot Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and @outrut . microcomputer, Reset of logic circuit, Battery check circuit, NC: NO CONNECTION 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 B: Open Collector B: Open Collector 7 “oe 'r, 8: iP SH () outer () outeur ‘ ' H ' |= C) =| L C - =| GND GND MITSUBISHI Jaeee 7

MITSUBISHI <Dig./Ana. INTERFACE> MS 1943A,B/M51944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM 519434, BL MS51944A, BL surry “2 foo 4,28 F----- = ‘SUPPLY VOLTAGE o.65v b--y VOLTAGE 1 t OUTPUT " ouTPUT H STATE STATE L Lt OUTPUT t t UNDEFINED ABSOLUTE MAXIMUM RATINGS (Ta=25¥. unless otherwise noted) [vec | Sumpyvotege SS SSCiSSSCSCSCSCSCSSSSd [isk | Ouput Sik conan iY

8 Type (Open collector output) |

ke | Thana Deatng tazese nw PFT [sd | Teor | Opmategtonpentre ———SSCdSSSSSCSCSCSCS~CS~SCSCSCS~SS mw [sig | storage wperaure SSCS ELECTRICAL CHARACTERISTICS (ta=25%, unless otherwise noted) M519434 M519444 519438 519448 Symbol Parameter Test condit Unt ym ramet est conditions i [ min [ tye | Mex | [vs | etecingvotage Po Pats [aes Tv a OO | vs/aT | Detecting votiage Temperature Coeftcent | To TT ee | \\ Circuit Current [Aweveo=sv T= 70 [560 [ had trou Corn B ivpe Voo=5V [=| [so |” v. Output Saturation Volta v H reset type Voc = SV, Isink= 4m Lf orfee] | L reset type Minimum RL=2.2kQ, Vsat S0.4V oon | Tvesholé Operating votge say age u easoav| — [oe {08 | y for IC operation FL=100k2,Vsarso4v] — | 0.55 | 0.7 | Output Leakage Current [ewe fo Tt ee Type Ta= =30— FOBT a Tog Octo toc Gos [ Ape voo=8v.vo=t/exveo | ao fe | | en | reponse ine wien vVoocwngen=e | — | 6 — | ms] Propagation Deray Time Response time when Voc changes LH P= [ 3f = [Hs | 7-8 wales

MITSUBISHI <Dig./Ana. INTERFACE> MS 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) _ “ELT TTT cut | cae =o et Peet | hl | § sof Se TT LTT | te EGEGnen = KI 5 42r—— [va | SERN “EERE Beis “CTT TT ol - 4.22 i!) 3 50 75 100 125 —40 —20 oO 20 40 60 80 100 AMBIENT TEMPERATURE Ta (°C) AMBIENT TEMPERATURE Tg ec) THRESHOLD OPERATING VOLTAGE OUTPUT SATURATION VOLTAGE VS. (IL] reset type) OUTPUT SINK CURRENT 1.0) s 0.3, B = 0 4 RESET TYPE :Vec=4V | (| > 06 3 :Vec™5V, priate OLE oo Al Pee So pra. 22K60 2 4, A CANES iy eo WK

3 WS 5

| Wee ELE TT I | 0 0.2 404 06 0.8 1.0 0 1 2 3 4 Ey 6 SUPPLY VOLTAGE Vege (V) OUTPUT SINK CURRENT Igink (mA) OUTPUT LOAD CURRENT VS. CIRCUIT CURRENT VS. OUTPUT VOLTAGE AMBIENT TEMPERATURE (M519XXA) (M51943B, M51944B) CCT TLL, - al * » FT ce re ee

2 EE SSE TTT Bf

g 5 wot | oN TT oa —20 300] i <t g Hitt ttt = ot | | | | eH He CE ee i LETT TT ott | TTT 0 4 8 12 16 —40 —20 0 20 40 60 80 100 OUTPUT VOLTAGE Vo {V} ‘AMBIENT TEMPERATURE Tg ec) MITSUBISHI ate MESURE 1-9

MITSUBISHI <Dig./Ana. INTERFACE> M5 1943A,B/M51944A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES EXAMPLE OF APPLICATION CIRCUIT Reset Circuit of M5194XX Series Vee SUPPLY ' ‘SUPPLY © VOLTAGE gn O VOLTAGE beled o|RESET(RESET) Losic ciRcumT 6) O nd 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- R, to overcome the pull-down resistor. nected to GND and the nagative supply voltage respec- tively. oe MITSUBISHI 7-10 ees