448-989

MICROPROCESSOR MC6802P The part number 448-989 is Zenith's internal stock numbering for the Motorola MC6802P, a classic 8-bit monolithic microprocessor. Zenith cross-referenced third-party semiconductors under their own proprietary numbers (often formatting the "989" suffix as a category indicator for specific integrated circuits) to manage service parts for their TVs, computer monitors, and terminal systems.Technical SpecificationsCore Architecture: It features an 8-bit data bus and a 16-bit address bus, capable of directly mapping up to 64 KB of memory.On-Chip RAM: Includes 128 bytes of internal RAM located between addresses $0000 and $007F. The first 32 bytes can be retained via a low-power standby voltage mode.Internal Clock: Contains an integrated clock oscillator and driver circuit, which eliminates the need for an external clock generator chip (unlike the original MC6800).Package Form: Housed in a standard 40-pin plastic Dual In-line Package (DIP).Common Applications & SubstitutionsZenith Hardware: This microprocessor was frequently deployed in Zenith Data Systems terminals (such as the Z-19), early computer peripherals, and advanced television control boards from the late 1970s and 1980s.Pinball & Arcade Systems: Outside of Zenith equipment, the MC6802P is highly recognized as a main processor or sound driver on pinball MPU boards, such as those made by Williams and Bally.Interchangeability: The chip can directly replace a Motorola MC6808 if the circuit design accounts for the internal RAM configuration. It is also functionally identical to Hitachi's licensed version, the HD6802P.