{"product_id":"national-semiconductor-dm8544n-tri-state-quad-switch-debouncer-ttl-16-pin-dip","title":"National Semiconductor DM8544N TRI-STATE Quad Switch Debouncer TTL 16-Pin DIP","description":"ITEM SPECIFICS\u003cbr\u003eBrand: National Semiconductor\u003cbr\u003eMPN: DM8544N\u003cbr\u003eSeries: DM7544\/DM8544\u003cbr\u003eType: TRI-STATE Quad Switch Debouncer\u003cbr\u003eLogic Technology: TTL\u003cbr\u003eNumber of Channels: 4\u003cbr\u003eOutput Type: TRI-STATE\u003cbr\u003ePackage: 16-Pin Molded DIP\u003cbr\u003eMounting Type: Through Hole\u003cbr\u003eAdditional Visible Markings: I\u003cbr\u003eDate Code: 8227 (1982, week 27)\u003cbr\u003eQuantity: 1\u003cbr\u003eCondition: New\u003cbr\u003e\u003cbr\u003eDESCRIPTION\u003cbr\u003eNational Semiconductor DM8544N TRI-STATE quad switch debouncer in a 16-pin molded dual in-line package. The photographed unit carries the National Semiconductor logo with the I8227 and DM8544N markings. A light-colored stripe of residue is visible across the pin 1 end of the package; see photos.\u003cbr\u003e\u003cbr\u003eFeatures:\u003cbr\u003eFour switch debouncer channels in one package.\u003cbr\u003eTRI-STATE outputs.\u003cbr\u003eTTL logic family.\u003cbr\u003eDesigned for front panels and similar applications where switch contact bounce must be eliminated.\u003cbr\u003e16-pin molded DIP for through-hole mounting.\u003cbr\u003e\u003cbr\u003eCompatibility:\u003cbr\u003eDirect replacement for DM8544N and DM8544 in boards designed for the DM8544 pinout. Common in front-panel switch inputs on vintage test equipment, instrumentation, and industrial controls.\u003cbr\u003e\u003cbr\u003eQ\u0026amp;A:\u003cbr\u003eQ: What does the DM8544 do?\u003cbr\u003eA: It removes contact bounce from mechanical switches so each press produces a single clean logic transition.\u003cbr\u003e\u003cbr\u003eQ: What is the difference between the DM7544 and DM8544?\u003cbr\u003eA: They are the same function in National Semiconductor's DM7544\/DM8544 family. The DM7544 is the military-temperature version and the DM8544 is the commercial version.\u003cbr\u003e\u003cbr\u003eQ: What does I8227 mean?\u003cbr\u003eA: 8227 is the date code (1982, week 27).\u003cbr\u003e\u003cbr\u003eTroubleshooting:\u003cbr\u003eCheck the supply voltage at the VCC and ground pins.\u003cbr\u003eIf outputs float, check the TRI-STATE enable input.\u003cbr\u003eConfirm switch wiring matches the datasheet connection diagram.\u003cbr\u003eCompare input and output states against the datasheet function table.\u003cbr\u003e\u003cbr\u003eDISCLAIMER\u003cbr\u003ePlease review all photos and specifications before purchasing, and make sure this part is right for your application. Item is sold as shown in the photos.\u003cbr\u003e\u003cbr\u003eLEGAL DISCLAIMER\u003cbr\u003eAmerican Industrial Parts Group is not an authorized distributor, reseller, or representative of National Semiconductor. All product names, trademarks, brands, and logos are the property of their respective owners and are used for identification purposes only. As an independent reseller, the original manufacturer warranty does not apply.\u003cbr\u003e\u003cbr\u003eDM8544N, DM8544, 8544N, DM7544, National Semiconductor DM8544N, NSC DM8544N, quad switch debouncer, switch debouncer IC, switch debounce circuit, push button debounce circuit, hardware debounce circuit, TRI-STATE debouncer, 16-pin DIP IC, vintage TTL IC 1982, front panel switch bounce fix, push button double trigger repair.\u003cbr\u003e\u003cbr\u003eThank you for shopping with American Industrial Parts Group!","brand":"National Semiconductor","offers":[{"title":"Default Title","offer_id":50015594512539,"sku":"NS-DM8544N-N","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/0857\/7435\/files\/national-semiconductor-dm8544n-quad-switch-debouncer-dip-16-1-american-industrial-parts-group.jpg?v=1793578169","url":"https:\/\/americanindustrialpartsgroup.com\/products\/national-semiconductor-dm8544n-tri-state-quad-switch-debouncer-ttl-16-pin-dip","provider":"American Industrial Parts Group","version":"1.0","type":"link"}