AN6780 PANASONIC | Alldatasheet

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Technical content

The AN6780 and AN6780S are ICs designed for general pur- pose long interval timers. They consists of an oscillator, fre- quency divider (flip-flop 15steps), output circuit, and power circuit. A cycle can be freely set with the external resistor (R and capacity (CT) of the oscillator. n Features

  • High inflow and outflow current : IO =±15mA max
  • Small variation of oscillations
  • Long interval timer setting : max 1 week n Applications Timers, integrating timers, superlow frequency oscillators AN6780, AN6780S General Purpose Long Interval Timers 0.3 + 0.1 – 0.05 18.2–0.3 6.0–0.3 2.4–0.25 1.5–0.25 0.5–0.1 2.54 1.5–0.25 3.0–0.3 Unit : mmAN6780 3.5–0.25 7-pin SIL Plastic Package (SIP007-P-0000) Voltage Stabilizer To each block Input Circuit Input Circuit Oscillator The pin numbers in ( ) are for the AN6780S. Output Circuit F/F F/F F/F (2) (9) (4) (6) V CC (12) (11) (8) GND n Block Diagram Unit : mmAN6780S 1.24 0.4–0.25 1.270.1–0.1 0.3 1.5–0.2 0.65 0.15 6.5–0.3 4.2–0.3 14-pin PANAFLAT Plastic Package (SOP014-P-0225A) 10.1–0.3

V 1–4 (2–8) V 2, 3–4 (4, 6–8) V 5–4 (9–8) V 6–4 (11–8) ICC I6 (11) PD Topr Tstg V V V V V mA mA mW Parameter Symbol Rating Unit n Absolute Maximum Ratings (Ta=25˚C) V CC *1 360 –20 to +75 –55 to +125 –15 Voltage Current Power dissipation Temperature Supply voltage Circuit voltage Supply current Circuit current Operating ambient temperature Storage temperature *1 When output is at “H”, the pin number are for the AN6780S Parameter Symbol Range n Recommended Operating Range (Ta=25˚C) Operating supply voltage range V CC 4.5V to 12V Parameter Symbol Condition min typ max n Electrical Characteristics (Ta=25˚C) Supply current ICC 10 mA6.5V CC =12V Oscillator charging current I1 (I2)m A 0.3V CC =5V, R=10kΩ Input current high level IIH 10 µAV CC =12V, VIH=12V Input current low level IIL µAV CC =4.5V, VIL=0V Output voltage high level V OH1 VV CC =5V, IOH =–1mA VV CC =9V, IOH =–10mAOutput voltage high level V OH2 VV CC =5V, IOL =10mAOutput voltage low level V OL1 VV CC =9V, IOL =10mAOutput voltage low level V OL2 VInput voltage high level V IH VInput voltage low level V IL 0.8 0.4 500 0.35 0.4 0.26 Unit n Pin Descriptions AN6780 Pin No. DescriptionSymbol AN6780S V S Stop Reset GND CR Output V CC Internal stabilized power supply Oscillation stop input Reset input Ground C.R. connection Output Supply voltage AN6780S : The Pins1, 3, 5, 7,10, 13 and 14 are non-contact.

(2) (4) (6) (8) V CC Pins numbers in ( ) are for the AN6780S Oscillation interval TO (S) 0.69RT (Ω ) · CT (F) Output interval TI (S) 22R T (kΩ ) · CT (µF) Integrating timer interval TS (s) 11R T (kΩ ) · CT (µF) + (T1 + T2 + ···) Timer interval Tt (S) 11R T (kΩ ) · CT (µF) R T 1 to 10µF C T R L V CR Output TO T1= 32768TO (9) AN6780, AN6780S (11) (12) V CC Pin numbers in ( ) are for the AN6780S Reset (Timer control) R T 1 to 10µF C T R L AN6780, AN6780S V CR Reset TO TS = T1 + T2 + 16384TO Stop Output T1 T2 V CR Output Reset TO V CC R T Pin numbers in ( ) are for the AN6780S 1 to 10µF C T R L AN6780, AN6780S Tt =16384T O Tt 1) Superlow frequency oscillator 2) Timer 3) Integrating timer Integration input (2) (4) (6) (8) (9) (11) (12) (2) (4) (6) (8) (9) (11) (12) n Application Circuit The pin numbers in ( ) are for the AN6780S (11) Obeserve the following in order to prevent destruction and reliability of the IC during its use. 1) For distribution of the oscillation frequency, take about 17% (IC alone) into account at the time of designing. When accuracy is requested, use a variable resistor as a timed resistor to make adjustment. 2) For the timed resistor, use a polyester capacitor with low tand, whose resistance is 1kΩ to 1MΩ and timed capacity of 0.1µF. 3) The values obtained from the timer interval calcuation expression, etc. in Application Circuit change depending on accuracy of the timed capacity in the actual set, etc. 4) Attach a capacity (1 to 10µF) to the Pin1 (2) in order to protect the IC against noises and stabilize its operation. 5) During normal operation, when you turn on the power after extremely short period of power-off, note that auto reset may not be applied due to residual potential of external capacity. 6) Take a proper countermeasure noises in order to prevent malfunctioning from being caused by external noises. Particularly, when setting a long interval, pay attention to the external noises. 7) When a plunger or relay is connected to the output circuit, connect diodes to both ends of the coil in order to protect the IC against counter electromotive power generated after power-off n Supplementary Descriptions

  • Precautions on Use

L H H Reset H L Stop Stop Start Stop Oscillator Clear Counting Stop Holds the previous state Frequency divider H Counting Stop Holds the previous state Output

  • Truth Table (Positive Logic) Note) *Either L or H will do. When the power is turned on, control proceeds to the mode 2 or mode 3 from the mode 1, depending on the reset/stop input state. 105 104 103 102 10–1 10–2 Timed Resistance RT (kΩ ) Oscillation Frequency fOSC (Hz) fOSC – RT C T=0.1 µF 1µF 10µF 100 µF High Output Current IOH (mA) High Output Voltage VOH (V) V OH – IOH 0 4 8 12 16 20 10 10 2 103 106 105 104 103 102 Timed Resistance RT (kΩ ) Timer Interval Tt (s) Tt – RT 200 160 120 Low Output Current IOL (mA) Output Voltage VOL (mV) V OL – IOL 10 10 3 0 4 8 12 16 20102 CT=100 µF 10µF 1µF 0.1 µF 1week 1day 10hrs. 60min. 10min. 1min. Ta=25˚C Supply Voltage VCC (V) Supply Current ICC (mA) ICC –V CC Ta=25˚CTa=25˚C 1.02 1.01 1.00 0.99 0.98 Ambient Temperature Ta (˚C) Nomalized Oscillation fOSC (14.5kHz) fOSC – Ta –40 0 40 80 120 V CC =5V C T=0.1µF R T=1kΩ 12V V CC =5V V CC =12V 2468 1 0 1 2 1 4 1 6 Tt n Characteristics Curve