{"product_id":"pti-electronics-cmos-dual-bus-memory-board-501-03883-00-0226-640","title":"PTI Electronics CMOS Dual Bus Memory Board 501-03883-00","description":"\u003cp\u003eA CMOS Dual Bus Memory board from PTI Electronics, this card carries part number 501-03883-00 with secondary board number 502-03093-00 visible on the label. The date code reads 22-85, indicating manufacture in 1985. The board is populated with Fujitsu MB8416A-15L 2Kx8 static CMOS RAM integrated circuits across multiple IC positions, with date codes ranging from 8433 to 8449, consistent with the 1984 to 1985 production timeframe. Logic support ICs visible in the lower section of the board include SN74LS640N, SN74LS340N, SN74LS273N, SN74S283N, SN74LS240N, SN74LS244N, SN74LS04, and related 74-series logic devices. The board features gold-plated card edge connectors on three sides, consistent with a multi-bus or proprietary backplane interface used in industrial CNC or process control systems of the period. Silkscreen labels identify connectors as CONN A1, CONN P1, and EXPANSION BUS. A write protect switch labeled SW1 is present, with ON and OFF positions marked. The board also carries internal sub-assembly references 502-70144-00, 502-70145-00, and 502-70146-00 visible on installed daughter components. Serial number 465004 and lot reference RB 1\/84 are printed on the board edge. The board is stored in its original anti-static protective bag. Compatible system application is not confirmed from photos alone.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-640\u003c\/p\u003e","brand":"PTI Electronics","offers":[{"title":"Default Title","offer_id":48891783086320,"sku":"m00640","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/A3D87501-1491-427C-99D7-7F5FD4407193.jpg?v=1772029044","url":"https:\/\/mroexchange.com\/products\/pti-electronics-cmos-dual-bus-memory-board-501-03883-00-0226-640","provider":"MRO Exchange","version":"1.0","type":"link"}