M731B1 Datasheet | SGS

COS/MOS INTEGRATED CIRCUIT M731 PRELIMINARY DATA ,16-STAGE COUNTER - LOW QUIESCENT POWER DISSIPATION - WIDE SUPPLY VOLTAGE RANGE: 3 to 17V ~ FULLY PROTECTED INPUTS - INVERTER AVAILABILITY FOR CRYSTAL OSCILLATOR TIMING APPLICATION - ADJUSTABLE FREQUENCY DIVIDER IN 127 STEPS - TEST OUTPUT AVAILABLE - MOTOR DRIVE STAGE OUTPUT The M731 (standard temperature range) is a 16 stage binary counter in COS/MOS technology in a single monolithic chip. An inverter is available for crystal oscillator application in which the function of the trimmer capacitor has been taken over by the variable frequency divider prised in the IC and used to set the correct output frequency. For this purpose seven adjustment terminals are provided on the M731: they are used to set the divider ratio to the required value with an accuracy of 10-6 . The adjustable frequency divider has been designed in such a way that the maximum output frequency is set when all adjustment terminals are either open-circuit or connected to pin 14. If one or more adjustment terminals are grounded (taken to pin 13), the output frequency decreases. The by-four-divided oscillator frequency may be checked at a separate test output (pin 8) non-reactive with respect to the oscillator. With an oscillator frequency of 4.194812 MHz, the series-connected push-pull output stage supplies a symmetrical square wave signal with a pulse duty factor of 0.5 and a repetition frequency of 64 Hz if the variable frequency divider is set to its medium valu:!. The device is available in 14 lead dual in-line plastic or ceramic...