AN6780, AN6780S General Purpose Long Interval Timers ■ Overview AN6780 Unit : mm The AN6780 and AN6780S are ICs designed for general purpose long interval timers. They consists of an oscillator, frequency divider (flip-flop 15steps), output circuit, and power circuit. A cycle can be freely set with the external resistor (RT) and capacity (CT) of the oscillator. 2.4±0.25 3.5±0.25 2.54 7 6 5 18.2±0.3 • High inflow and outflow current : IO=±15mA max • Small variation of oscillations • Long interval timer setting : max 1 week 4 0.5±0.1 1.5±0.25 ■ Features 3 2 1 + 0.1 0.3 – 0.05 ■ Applications 1.5±0.25 6.0±0.3 3.0±0.3 Timers, integrating timers, superlow frequency oscillators 7-pin SIL Plastic Package (SIP007-P-0000) 14 13 12 11 10 9 8 0.3 4.2±0.3 0.15 0.65 0.1±0.1 10.1±0.3 1 2 3 4 5 6 7 1.5±0.2 1.24 Unit : mm 1.27 0.4±0.25 AN6780S 6.5±0.3 14-pin PANAFLAT Plastic Package (SOP014-P-0225A) ■ Block Diagram (2) 1 7 Voltage Stabilizer VCC (12) To each block 5 2 (9) (4) Oscillator Input Circuit F/F 1 F/F 2 F/F 15 Output Circuit 6 (11) 3 (6) Input Circuit 4 (8) The pin numbers in ( ) are for the AN6780S. GND ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating VCC 13 Supply voltage Voltage Circuit voltage Current V V1–4 (2–8) 0 4 V V2, 3–4 (4, 6–8) 0 13 V V5–4 (9–8) 0 4 V V6–4 (11–8) VCC *1 Supply current ICC 30 Circuit current I6 (11) Power dissipation Temperature Unit V mA –15 15 PD mA 360 mW Operating ambient temperature Topr –20 to +75 ˚C Storage temperature Tstg –55 to +125 ˚C *1 When output is at “H”, the pin number are for the AN6780S ■ Recommended Operating Range (Ta=25˚C) Parameter Symbol Range VCC 4.5V to 12V Operating supply voltage range ■ Electrical Characteristics (Ta=25˚C) Parameter Symbol Supply current ICC Oscillator charging current I1 (I2) Condition VCC=12V VCC=5V, R=10kΩ min typ max Unit 4 6.5 10 mA 0.26 0.3 0.35 mA Input current high level IIH VCC=12V, VIH=12V 10 µA Input current low level IIL VCC=4.5V, VIL=0V 500 µA Output voltage high level VOH1 VCC=5V, IOH=–1mA 3 Output voltage high level VOH2 VCC=9V, IOH=–10mA 5 Output voltage low level VOL1 VCC=5V, IOL=10mA 0.4 V Output voltage low level VOL2 VCC=9V, IOL=10mA 0.4 V Input voltage high level VIH Input voltage low level VIL Pin No. Symbol 1 2 VS 2 4 Stop Oscillation stop input 3 6 Reset Reset input 4 8 GND Ground 5 9 CR 6 11 Output 7 12 VCC Internal stabilized power supply C.R. connection Output Supply voltage AN6780S : The Pins1, 3, 5, 7,10, 13 and 14 are non-contact. V 0.8 Description AN6780S V 2 ■ Pin Descriptions AN6780 V V ■ Application Circuit 1) Superlow frequency oscillator VCR AN6780, AN6780S (2) 1 (4) 2 (6) 3 (8) 4 (9) 5 TO (11) (12) 6 7 Reset VCC RT + 1 to 10µF – RL CT Pins numbers in ( ) are for the AN6780S Stop T1 T2 Output VCR TS = T1 + T2 + 16384TO TO Integrating timer interval TS (s) 11RT (kΩ) · CT (µF) + (T1 + T2 + ···) Output T1= 32768TO Oscillation interval TO (S) 0.69RT (Ω) · CT (F) Output interval TI (S) 22RT (kΩ) · CT (µF) 2) Timer AN6780, AN6780S (2) 1 + 1 to 10µF – (4) 2 (6) 3 (8) 4 (9) 5 (11) (12) 6 7 VCC RT RL CT Pin numbers in ( ) are for the AN6780S Reset (Timer control) VCR TO Reset Output Tt =16384TO Tt Timer interval Tt (S) 11RT (kΩ) · CT (µF) 3) Integrating timer AN6780, AN6780S (2) 1 (4) 2 (6) 3 (8) 4 (9) 5 (11) (12) 6 7 ■ Supplementary Descriptions • Precautions on Use 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 tanδ, 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 VCC 1 to + 10µF – RT RL CT Pin numbers in ( ) are for the AN6780S Integration input (11) 6 The pin numbers in ( ) are for the AN6780S • Truth Table (Positive Logic) Mode Reset L Stop * Oscillator 1 Stop Clear Frequency divider H Output 2 H H Start Counting Counting 3 H L Stop Stop Holds the previous state Stop Holds the previous state 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. ■ Characteristics Curve fOSC – RT Tt – RT Ta=25˚C 106 =0 T 103 1µ .1 µF F 102 10 µF 10 10 0µ F 1 10–1 F 0µ 10 105 = CT 104 µF 10 F 1µ 10min. µF .1 1min. 103 2 0 160 12V 120 80 40 10 10–2 1 10 102 1 103 Timed Resistance RT (kΩ) 1 10 102 0 103 VOH – IOH VCC=12V 8 9V 4 5V 12 16 High Output Current IOH (mA) 20 12 16 20 ICC –VCC 10 Ta=25˚C VCC=5V CT=0.1µF RT=1kΩ 9 Supply Current ICC (mA) Nomalized Oscillation fOSC (14.5kHz) 12 8 8 fOSC – Ta Ta=25˚C 4 4 Low Output Current IOL (mA) 1.02 0 0 Timed Resistance RT (kΩ) 16 High Output Voltage VOH (V) 1day 10hrs. 60min. 10 VCC=5V 1week Output Voltage VOL (mV) C 0 VOL– IOL 200 Tt 104 Timer Interval Tt (s) Oscillation Frequency fOSC (Hz) 105 1.01 1.00 0.99 8 7 6 5 4 3 2 1 0.98 –40 0 40 80 120 Ambient Temperature Ta (˚C) 0 0 2 4 6 8 10 12 14 Supply Voltage VCC (V) 16