Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment SOLARTRON 7081 Mickle diagrams mm58174
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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
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