I have some legacy designs that use obsolete 68HC705J2 MCUs. These are 20 pin DIP with 2K ROM in a OTP package. A J1 version is still around but not enough ROM... I'd like to keep the board and kit but need replacements for this MCU. I can't find them anywhere - even considered using an J2 SOIC with package converters but nothing available.
Anyone know of a pin compatible part, or another MCU from that could be substituted? Worst case, I could rewrite the 05 code and rearrange a daughterboard for another MCU, but that's alot to do.....only minor code changes need for the updates as is..