M51849L MITSUBISHI | Alldatasheet

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MITSUBISHI <LINEAR ICs> MS1849L,FP COUNTER TIMER

DESCRIPTION

The M51849 is a semiconductor integrated circuit designed PIN CONFIGURATION (TOP VIEW) for controller of long time delay, consisting of 11 stage divider by IIL. The time base period of oscillator is ex- reser[i] tended 1024 times, determing by the 11 stage divider by OSCILLATION stop controt [>] ILL, and the maximum output period is 10 hours. cr inpuT[3] z FEATURES REFERENCE VOLTAGE[4] @ Timing from 100ms through 10 hr max cnofs] g @ High current output can sink (30mA peak) Vee[e] r © Built-in stabilization zener se © Built-in power on reset STABILIZATION ZENER output[8] APPLICATION : Precision timing, time delay generation, Ultra-low- Outline 8P5 frequency oscillator OSCILLATION STOP RECOMMENDED OPERATING CONDITIONS cr input [1] Po] conTROL Supply voltage ---:--- SV~Vz(Vz=pin © Zener voltage) REPERENCE (ZI EZ [laeser Rated supply voltage sss: 6VE10% no fH z Fe} nc eno [a] 3 OUTPUT Vee [5] [6] STABILIZATION ZENER Outline 10P2-C NC : NO CONNECTION BLOCK DIAGRAM GND STABILIZATION ZENER Vee t POWER ON REFERENCE RESET VOLTAGE 1 CR INPUT FFI Fre | ----4 Frio FFI chy () output R R R R OSCILLATOR | a OSCILILATION STOP CONTROL. RESET MITSUBISHI 3-16 Paes :

MITSUBISHI <LINEAR ICs> M51849L,FP COUNTER TIMER COUNTER TIMER ABSOLUTE MAXIMUM RATINGS (12=25€, unless oterwise noted) [Sebo] Parameter a Te [zenereuret Sd [Ta a oe [eg [Power dpeton 6076) | mw | [Ke | memaisonung ea 3.6(L/FP) | Topr [Opening emperor [stg sioageonpermirg ens ELECTRICAL CHARACTERISTICS (1a-25¢. vec~6v unless otherwise noted) ee ee SS [ve | zerervotage ima SSC~i | 8 a a ee se tg | Rewat ewe | Ves Osean top votags pps fis vy [ioe | Osetaten stop put curent | a [Vow | Woreuputvotage areata | [ver [tow ouput votogs ST nnetona e e | || Open possi ing om | = rmnpaccusey Pe |= Tenperaurecootignt 00 | | |= supp votagerejectonrato nt serv | a a MITSUBISHI oases 3-17

MITSUBISHI <LINEAR ICs> MS1849L,FP COUNTER TIMER TYPICAL CHARACTERISTICS (1o=25¢. unless otherwise noted) THERMAL DERATING CIRCUIT CURRENT VS. (MAXIMUM RATING) SUPPLY VOLTAGE 500) 5 att tlt| {Lite = 400} 4 Bag |S <| . 3 /\\ é é 3 \\S : 2 20 7 3 2 pt LUND | og EE 8 100) Ty eo ol 0 rr a i a 0 2 4 6 8 10 AMBIENT TEMPERATURE Ta(C) SUPPLY VOLTAGE Voc(V) OUTPUT VOLTAGE VS. OUTPUT VOLTAGE VS. OUTPUT SINK CURRENT OUTPUT SOURCE CURRENT 10 10 f=[ [1 = Se w uw 6 3 3 2 > 4 a 5 oo A ia i z 0.01 — 0 | | a) 1 10 100 0.1 1 10 100 OUTPUT SINK CURRENT Isink(mA) OUTPUT SOURCE CURRENT source (mA) RESISTANCE VS. DELAY TIME 10* Woortv Wa A ZA 3 R= 200K. / | £ oo L Fy 5 0 Z| a \\A 10 Z| 10K 100K 1M 10m RESISTANCE Rr(2) aa SRR 3-18 ELECTRIC

MITSUBISHI <LINEAR ICs> MS51849L,FP COUNTER TIMER PIN DESCRIPTION Voc by a variable resistor or resistor division (Ry, Rez). 1. Reset pin <pin@(L), pin@(FP)> The capacitor Cy is corrected by minutely adjusting this This pin is used to stop counter operation. If the pin is in voltage by a variable resistor. The voltage can be set be- the high state, the counter is cleared and oscillation is tween 0.4V to 0.8V. The oscillator may not function if the stopped. Connect this pin to GND, if not used. Voltage is outside this range. 2. Oscillation stop control pin <pin@(L), pindd(FP)> 5. Stabilization zener pin <pin@(L), pin@(FP)> It the pin is in the high state, the oscillation stops. But the A zener diode of approximately 6.4V is connected be- status of counter is not maintained, and therefore, if the tween this pin and pin © (GND). Set the resistance so pin is reset to the low state, timing operation is resumed. that the zener current is 5mA. Connect the pin to GND, if not used. 6. Output pin <pin®@(L), pin@(FP)> 3. CR input pin <pin@(L), pin@(FP)> The output voltage changes from the low state to the The capacitor Cy and resistor Rr are connected to this high state when the oscillation period is 1024 times of To, pin. The oscillation period is given in the following equa- and the voltage returns from the high state to the low tion. The resistor Rr should be 1k2 or above. state when the period is 2048 times for one cycle. The 4. Reference voltage pin <pin@(L), pin@(FP)> voltage can sink or source up to 10mA(typ.). Care must The highest voltage for the oscillation level is supplied at be taken in power supply variation in the integrated cir- this pin, The voltage should be set at approximately 2/3 cuit when the output load current is large. APPLICATION EXAMPLE Monostable operation M51849L_ © OTTPUT 5.1k bd om & g 10. OUTPUT WAVEFORM 560 fe O12 The delay time in the above application example is given by : Tp#800Cy-Rr(sec) The timing resistor Ry should be 1k or above. Precautions for use 3. This integrated operates at ultra-low supply voltage. 1. GR input pin <pin@(L), pin@(FP)> must not be directly Theretore it is very sensitive to external noise and is connected to Vcc to avoid destruction of the integrated subject to misoperation. - circuit. A capacitor must be connected near the Vcc pin <pin 2. Timing accuracy should be fine-tune to use external GIL), pin@(FP)> to avoid noise. resister series with Ry when that need less than +5%. MITSUBISHI oe MRS 3-19