SOLARTRON mm58174 free download

File name mm58174.pdf

MM58174A Microprocessor-Compatible Real-Time Clock May 1991 MM58174A Microprocessor-Compatible Real-Time Clock Y TTL compatible General Description Y Low power standby operation (2 2V 10 mA) The MM58174A is a low-threshold metal-gate CMOS circuit Y Low cost internally biased oscillator that functions as a real-time clock and calendar in bus-ori- ented microprocessor systems The device includes an in- Y Low cost 16-pin dual-in-line package terrupt timer which may be programmed to one of three Y Available for commercial and military temperature times Timekeeping is maintained down to 2 2V to allow low ranges power standby battery operation The timebase is generat- ed from a 32768 Hz crystal-controlled oscillator Applications Y Point-of-sale terminals Features Y Word processors Y Microprocessor compatible Y Teller terminals Y Tenths of seconds seconds tens of seconds minutes Y Event recorders tens of minutes day of week days tens of days Y Microprocessor-controlled instrumentation months tens of months independent registers Y Microprocessor time clock Y Automatic leap year calculation Y TV VCR reprogramming Y Internal pull-ups to safeguard data Y Intelligent telephone Y Protection for read during data changing Y Independent interrupt system with open drain output Block Diagram TL F 6681