The TK68HC24 Port Replacement Unit Tekmos, working in cooperation with Motorola, has designed a replacement for the Motorola MC68HC24. This part is designed to be identical to the Motorola part, and is a drop-in replacement for the Motorola part. We provide the part in both the 40 PDIP version and the 44 PLCC version.
All parts are at the fastest speed grade.
Here is a product brief , in pdf format, describing the part. The TK68HC24 can be purchased directly from Tekmos. Volume production orders can be delivered within 12 weeks after the receipt of an accepted order. However, most orders are shipped on receipt. Here is the pricing schedule for the TK68HC24.