AN, ANS General Purpose Long Interval Timers Overview The AN and ANS are ICs designed for general purpose long interval timers. They consists of an oscillator, frequency divider (flip-flop steps), output circuit, and power circuit. A cycle can be freely set with the external resistor (R T) and capacity (C T) of the oscillator. Features igh inflow and outflow current : I O =±ma max Small variation of oscillations Long interval timer setting : max week Applications Timers, integrating timers, superlow frequency oscillators Block Diagram () () () Oscillator Input Circuit Input Circuit To each block The pin numbers in ( ) are for the ANS. AN oltage Stabilizer.±. ANS.±....±..±..±.. +...±..±...±..±. -pin SIL Plastic Package (SIP-P-).±.. Circuit.±..±. 9.. () ().±. CC GND Unit : mm Unit : mm.±. -pin PANAFLAT Plastic Package (SOP-P-A)
Absolute Maximum Ratings (Ta= C) Parameter Symbol Rating Unit Supply voltage CC () oltage, (, ) Circuit voltage (9) () CC * Current Supply current I CC ma Circuit current I () ma Power dissipation P D mw Temperature Operating ambient temperature T opr to + C Storage temperature T stg to + C * When output is at, the pin number are for the ANS Recommended Operating Range (Ta= C) Parameter Symbol Range Operating supply voltage range CC. to Electrical Characteristics (Ta= C) Parameter Symbol Condition min typ max Supply current I CC CC=. ma Oscillator charging current I (I ) CC=, R=kΩ... ma Input current high level I I CC=, I= µa Input current low level I IL CC=., IL= µa voltage high level O CC=, I O=mA voltage high level O CC=9, I O=mA voltage low level OL CC=, I OL=mA. voltage low level OL CC=9, I OL=mA. Input voltage high level I Input voltage low level IL. Pin Descriptions Pin No. Symbol AN ANS S Internal stabilized power supply Oscillation stop input input GND Ground 9 CR C.R. connection CC Supply voltage ANS : The Pins,,,,, and are non-contact. Description Unit
Application Circuit ) Superlow frequency oscillator () () () + to µf CT CR ) Timer AN, ANS CC Pins numbers in ( ) are for the ANS T= Oscillation interval T O (S).9 (Ω) CT (F) interval T I (S) (kω) CT (µf) + to µf CT CR () Timer interval T t (S) () AN, ANS () () CC Pin numbers in ( ) are for the ANS (Timer control) ) Integrating timer () () AN, ANS () to + µf CT = () () () (kω) CT (µf) () () CC Pin numbers in ( ) are for the ANS Integration input CR TS = T + T + Integrating timer interval T S (s) (kω) CT (µf) + (T + T + ) Supplementary Descriptions Precautions on Use Obeserve the following in order to prevent destruction and reliability of the IC during its use. ) For distribution of the oscillation frequency, take about % (IC alone) into account at the time of designing. When accuracy is requested, use a variable resistor as a timed resistor to make adjustment. ) For the timed resistor, use a polyester capacitor with low tanδ, whose resistance is kω to MΩ and timed capacity of.µf. ) 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. ) Attach a capacity ( to µf) to the Pin () in order to protect the IC against noises and stabilize its operation. ) 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. ) 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. ) 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 () The pin numbers in ( ) are for the ANS T T
Truth Table (Positive Logic) Mode Oscillator Frequency divider L * L Start Clear Counting olds the previous state Counting olds the previous state Note) *Either L or will do. When the power is turned on, control proceeds to the mode or mode from the mode, depending on the reset/stop input state. Characteristics Curve Oscillation Frequency fosc (z) igh oltage O () f OSC R T CT=.µF µf µf µf Timed Resistance R T (kω) O I O Ta= C CC= 9 igh Current I O (ma) Timer Interval (s) Nomalized Oscillation fosc (.kz)....99 T t R T CT=µF µf µf.µf week day hrs. min. min. min. oltage OL (m) Timed Resistance R T (kω) Low Current I OL (ma) f OSC Ta CC= CT=.µF =kω.9 Ambient Temperature Ta ( C) Supply Current ICC (ma) 9 OL I OL I CC CC Ta= C CC= Ta= C Supply oltage CC ()
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