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146818A A46D rtc real time clock ram MC146818AP 6800 ic


146818A A46D RTC Real Time Clock + RAM MC146818AP, MC146818P, 6800 Family IC
146818A is the Enhanced version of the MC146818P 8-bit CMOS Real-Time Clock-Calendar integrated circuit from Motorola's MC6800 family.
This RTC circuit has two distinct uses. First, it is designed as a battery powered CMOS part including all the common battery backed-up functions such as RAM, Time and Calendar. Secondly, the 146818A may be used with a CMOS Microprocessor to relieve the software of the timekeeping workload and to extend the available RAM of an MPU such as the MC146805E2.
The basic features of 146818A are:
- Internal Time Base and Oscillator
- Counts seconds, minutes and hours of the day
- Counts days of the week, date month and year
- Binary or BCD representation of Time, Calendar and alarm
- 12- or 24-Hour Clock with AM and PM in 12-Hour mode
- Daylight savings time option
- Automatic End of Month detection
- Automatic Leap Year compensation
- Microprocessor bus compatible
- 14 bytes of clock and control registers
- 50 bytes of general purpose RAM
EUROPE (All countries): 7...10 days
ALL OTHER destinations (North and South America, Asia, Africa, etc.): 10...15 days
1. Wire transfer. I would prefer if you can send a direct wire transfer to my bank account in Bulgaria, in EUR or USD. I will provide all IBAN and BIC / SWIFT codes you will need for these transfers. I will provide full details of an intermediary bank too (only if necessary). If a bank transfer to my country is not possible or if it is too expencive, I can provide bank accounts in United Kingdom (UK), Germany and France with their respective IBAN account numbers. Full bank details will be provided upon request.
4.1. International Postal Money Orders from countries like Japan and Italy (and from other countries) that are sent from a post office and should be cashed at my local post office. These postal money orders should be sent to my Bulgarian street address. If you need more infomration, please contact me.



146818A A46D rtc real time clock ram MC146818AP 6800 ic