DS1287 realtime clock replacement

[ppppenguin]

I've designed those Dallas chips into projects I've done for my clients so I'm as guilty as anyone else. At the time they were seen as a simple and convenient solution. At least with an RTC you aren't losing calibration data as you might in some (for example) Tektronix kit which used similar devices with memory.

I don't have the headroom above the PCB to do very much with cutting it open and fitting an external battery. At least it's plugged into a socket so if I want to bodge it I can do it safely away from the equipment.