M730D1 Datasheet | SGS

~/MOS INTEGRATED CIRCUIT ~ M730 PRELIMINARY DATA ~-STAGE COUNTER ~ LOW QUIESCENT POWER DISSIPATION - WIDE SUPPLY VOLTAGE RANGE: 3 to 17V II FULLY PROTECTED INPUTS .. INVERTER AVAILABILITY FOR CRYSTAL OSCILLATOR TIMING APPLICATION - ADJUSTABLE FREQUENCY DIVIDER IN 127 STEPS it TEST OUTPUT AVAILABLE - MOTOR DRIVE STAGE OUTPUT the M730 (standard temperature range I is a 23 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 let the correct output frequency. For th is purpose, seven adjustment terminals are provided on the M730: 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.lf one or more adjustment terminals are grounded (taken to pin 131, the output frequency decreases. The by-four-divided oscillator frequency may be checked at a separate test output (pin 81 non-reactive with resp"ct to the oscillator. Based on this check the output frequency and consequently the accuracy of the clock may be adjusted at the ter- minal1 to 7 by means of the variable frequency divider. 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 0.5 Hz if the variable frequency divider is set to its medium value. The device is available in 14 lead dual in-line plasti C or ceramic...