PTI CMOS Dual Bus Memory Board 501-03883-00
PTI CMOS Dual Bus Memory Board 501-03883-00
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Stock #:
A CMOS Dual Bus Memory Board from PTI, assembly number 501-03883-00, this card is a vintage industrial PCB designed for dual bus CNC control system architectures. The board carries PCB number 503-52740 and is dated revision B, January 1984, consistent with early 1980s CNC memory expansion technology. The memory array is populated with Hitachi HM6264LP-15 CMOS static RAM ICs, visible across both sides of the board in a high density arrangement. A Tadiran lithium inorganic battery is present on the board for memory backup retention. Onboard logic ICs include Texas Instruments 74LS and 74ALS series devices, supporting the dual bus interface and address decoding functions. The board connects via dual card-edge connectors labeled CONN P1 and CONN P2, consistent with a backplane or motherboard slot installation. A write-protect switch is present and labeled ON and OFF. Board markings indicate 5V VCCA supply requirements at the power connector area. Multiple sub-assembly stickers are visible, including 502-70172-00, 502-70174-00, and 502-70196-00, referencing individual functional blocks on the assembly. This board is intended for use as a spare or replacement in legacy CNC control systems that accept this dual bus memory format.
Stock # 0226-659
