Ama-PCB Pin Headers: Umhlahlandlela Wokukhetha Nokufaka

I-header ye-PCB, noma i-pin header, iwumugqa (noma imigqa) wama-conductive pitch ku-fixed pitch, ahlanganiswe ebhodini ukuze anikeze amaphuzu okuxhuma, izikhundla ze-jumper, noma indlela yokuhlanganisa amabhodi ndawonye. Abukeka engabalulekile, kodwa i-header iyisixhumi, futhi ukukhetha ubulili obungalungile, i-pitch, i-orientation, noma isitayela sokufaka kungumthombo ovamile wamabhodi angeke ahlangane, ahluleke ngomshini, noma angakwazi ukuhlanganiswa kahle. Lo mhlahlandlela uchaza ukuthi iyini i- PCB header , imininingwane echaza eyodwa, umehluko phakathi kwezinhlobo ze-through-hole kanye ne-surface-mount, kanye nendlela yokuwabeka nokuwahlanganisa ngokuthembekile.

Iyini i-Pin Header nokuthi isetshenziswa kuphi

I-pin header inikeza uxhumano lukagesi olulula noluphindaphindwayo emgqeni wezipini ezibekwe endaweni evamile. Ukufakwa kwepulasitiki kugcina izipini endaweni yazo futhi kusetha isikhala, kanye ne-pin solder ebhodini. Izipini zivela cishe yonke indawo:

• Ukuxhumana phakathi kwebhodi nebhodi, ukuxhumanisa inhloko ebhodini elilodwa elinesokhethi kwelinye.
• Izixhumanisi zebhodi kuya-ngocingo, lapho ikhebula elinesivalo esifanayo lixhuma khona ekhanda.
• Ama-Jumper kanye nokucushwa, lapho i-shunt ihlanganisa khona izikhonkwane ezimbili ukuze ibeke inketho.
• Amachweba okuhlela nokulungisa amaphutha, njengezihloko ezisetshenziswa ukukhanyisa i-microcontroller.
• Izixhumi zokunweba, njengezihloko zokubeka izinto emabhodini okuthuthukisa athandwayo.

Ngenxa yokuthi i-header iyisixhumi esibonakalayo sokuxhumanisa, ukukhetha kuncike ekutheni ixhumeka kuphi. Nquma lokho kuqala, bese imininingwane engezansi ilandela ngokwemvelo.

Imininingwane Echaza Isihloko

Isihloko sichazwa ngokugcwele yimingcele embalwa. Ukuwenza wonke abe ngcono yikho okwenza izingxenye ezimbili zihlangane futhi zihlale zithembekile.

Umkhuba owusizo ukucacisa inhloko kanye nomlingani wayo ndawonye, ​​​​ukuqinisekisa iphimbo, inani lephinikhodi, ubulili, kanye nokuhambisana kokuxhumana. Ukwehluleka okuningi kokuhlangana kuvela ekuxubeni izingxenye ezazingahloselwe ukulingana.

Isilinganiso Samanje: Amandla vs Amakhanda Esiginali

Akuwona wonke ama-header athwala umthwalo ofanayo. Elinye elisetshenziselwa amasignali kuphela linezidingo ezihluke kakhulu kumandla okuletha, futhi isilinganiso samanje yisona esiwahlukanisayo.

Yini ebeka isilinganiso samanje

• Usayizi wokuthintana kanye nengxenye ephambene yamaphini.
• Ukufakwa kweplati, okuthinta ukumelana nokuxhumana nokushisa.
• Inani lamaphini aseduze alayishwa ngesikhathi esisodwa, okudinga ukugxekwa.
• Ukuphakama kwezinga lokushisa okungakubekezelela umklamo.

Kumasignali, i-header ejwayelekile engu-2.54 mm ilungile. Ukuze uthole amandla, hlola isilinganiso samandla ngomshini womkhiqizi, susa amaphini alayishiwe eduze kanye nokushisa, bese uhambisa amaphini amaningana noma uhambise isixhumi samandla esizinikele kuma-currents aphezulu. Ukuhambisa umkhondo wokunikezwayo uye futhi ubuye ku-header yamandla kuyingxenye yokuphathwa kwamandla ezingeni lebhodi okuqinisekiswa ngesikhathi sokuhlanganiswa kwe-PCB , futhi kuhlangana nezinqumo ezibanzi zokushisa kanye nezamandla ngemuva kokukhiqizwa kwe-elekthronikhi yamandla.

Iphimbo: Kungani i-2.54 mm iyi-Standard

I-pitch iyindawo ephakathi nendawo phakathi kwamaphini, futhi yinto yokuqala okufanele ilunge ngoba i-header kanye nomngane wayo kumele babelane ngayo ngqo.

Izincazelo ezivamile

• 2.54 mm (0.1 intshi) iyindinganiso yakudala, ehambisana ne-ANSI/JEDEC. Kulula ukuyithengisa ngesandla, iqinile, futhi ihambisana nohlu olubanzi lwezintambo, amasokhethi, kanye nehadiwe yokwenza amaphrothotayipi, okwenza kube yinto ezenzakalelayo yomsebenzi omningi wenhloso evamile.
• 2.00 mm usayizi wokusika usayizi ngenkathi kulula ukuwuphatha.
• 1.27 mm cishe iphinda kabili ubukhulu futhi kuvamile lapho isikhala sincane.
• 1.00 mm futhi ama-pitch amahle afaka ukuxhumana okuningi endaweni encane kodwa kunzima ukuwahlanganisa nokuwaphatha.

Khetha iphimbo elikhulu kunawo wonke elifanelana nesabelomali sakho sesikhala. Iphimbo elincane lithenga ubuningi ngezindleko zokuqina komshini, ubunzima bokuhlanganisa, kanye nokutholakala kwezingxenye ezifanayo ngezinye izikhathi.

Ama-Header e-Through-Hole vs Surface-Mount

Indlela inhloko enamathela ngayo ebhodini iyisinqumo sesakhiwo kanye nesogesi.

Kusixhumi esixhunywe futhi sikhishwa njalo, noma esithwala umthwalo womshini, imbobo edlulayo ngokuvamile iyindlela ephephile ngoba amaphini anamathele ebhodini. Ama-header afakwa ngaphezulu agcina ibhodi lisebenza ngendlela eyodwa futhi akhulule umzila wengqimba yangaphakathi, kodwa kunoma yini ehlangabezana nokufakwa okuphindaphindiwe noma imithwalo eseceleni, engeza i-anchor yomshini, njengesikhonkwane sembobo edlulayo noma ithebhu yokubamba phansi, ukuze ukucindezeleka kungafiki emajoyintini e-solder kuphela. Noma ngabe yikuphi, ukugoqa kwenzeka ngesikhathi sokuhlanganiswa kwe-PCB, futhi isitayela sokufaka sinquma ukuthi iyiphi inqubo esetshenziswayo.

Ama-Header ambozwe, afakwe ukhiye, futhi ahlukaniswe

I-header ecacile ayinikezi sivikelo ekuxhunyweni ngendlela engafanele. Izinhlobo eziningana zengeza leso sivikelo.

• Amakhanda ambozwe (ibhokisi) zungeza izikhonkwane ngodonga lwepulasitiki, uzivikele futhi uqondise isixhumi sokuxhumanisa.
• Amakhanda anesihluthulelo engeza isikhala noma i-notch ukuze i-mate ifaneleke ngendlela eyodwa kuphela, ukuvimbela uxhumano olubuyiselwe emuva.
• Izakhiwo ezihlanganisiwe sebenzisa iphinikhodi evinjiwe noma isici esingalingani ukuze uphoqelele ukuqondiswa.

Kunoma yikuphi ukuxhumana lapho ukubuyisela emuva ipulaki kungalimaza ibhodi, imbobo yokuhlela, okokufaka ugesi, ikhebula leribhoni, khetha i-header embozwe futhi enesihluthulelo. Izindleko ezincane ezengeziwe zishibhile kakhulu kunokwehluleka kwensimu okubangelwa ukuxhumana okungemuva.

Ukufakwa Kwebhodi Eliya Ebhodini

Ama-header ayindlela evamile yokufaka amabhodi, ukuhlanganisa i-header yesilisa ebhodini elilodwa ne-socket yesifazane kwelinye ukudala i-assembly encane nehlukanisiwe. Amapharamitha abalulekile ukuphakama kwe-stack (okusethwe yi-header kanye ne-socket geometry), ukuqondanisa, kanye nokusekelwa kwemishini.

Amabhodi ahlanganisiwe abeka imithwalo yokugoba nokudlidliza ezixhumini, ngakho-ke ukwesekwa komshini, ama-standoff noma uhlaka, kususa ukucindezeleka eziphinini. Lapho i-stack ingaba yinde, ibuthakathaka, noma ingaphansi kokunyakaza okuqhubekayo, ukuxhumana okuguquguqukayo ngezinye izikhathi kuyimpendulo engcono: ukwakhiwa okuqinile okuguquguqukayo kungathatha indawo yezixhumi zebhodi nebhodi ngokuphelele ngesigaba esihlanganisiwe esiguquguqukayo, kususe isikhombimsebenzisi sokuhlangana esingakhululeka noma sikhathale. Ukuthi ukusebenzisa ama-stacking headers noma i-integrated flex link kuwukuhwebelana phakathi kwe-modularity nokuthembeka.

Umklamo Wezinyawo Nowomshini

Isihloko sisebenza kuphela uma unyawo lwaso luhambisana nengxenye futhi ibhodi lingakwazi ukuthwala umthwalo.

Ukuthola iphethini yezwe kahle

Sebenzisa indawo enconyiwe ngumenzi. Kuma-header angena emigodini, ububanzi bembobo kumele buvumelane nosayizi wephini nendawo efanele, kungaqini kangako ukuthi iphini ngeke ihlale noma ikhululeke kakhulu, ijoyinti libuthakathaka, futhi indandatho ehlanganisiwe kumele yanele. Kuma-header afakwa ngaphezulu, usayizi wephedi kanye negceke kumele kufane nengxenye futhi kushiye isikhala sokubekwa nokuhlolwa. Usayizi wembobo noma iphedi ongalungile uyimbangela evamile yama-header angalingani noma angahlangani kahle, futhi yilona kanye uhlobo lwephutha olubanjwa yi- DFM review ngaphambi kokwenziwa.

Ukuqina komshini

Ama-header athatha amandla okuphatha, ngakho-ke wabeke lapho ibhodi lisekelwa khona, uwagcine kude nezindawo ezigobekayo, bese wengeza imigodi yokufaka noma izindawo zokuma eduze kwezixhumi ezithwala umthwalo. Uma kubalwa amaphini amaningi noma ukusetshenziswa kakhulu, imigodi egobile inikeza isibopho esiqinile kakhulu semishini, okuyingxenye yesizathu esenza ama-header emigodi ahlala ethandwa kakhulu yizixhumi. Ikhwalithi yemigodi kanye ne-plating ngokwayo iwumsebenzi wekhwalithi yokukhiqiza i-PCB , ngakho inqubo yobuciko kanye nokukhetha i-header kusebenza ndawonye.

Amanothi Okubophela Nokuhlanganisa

Isitayela sokufaka sibeka indlela i-header ehlanganiswa ngayo, futhi amaphuzu ambalwa asebenzayo agcina amalunga ethembekile.

• Amakhanda angena emgodini Zihlanganiswa nge-wave, i-selective, noma i-hand soldering, ngokuvamile ngemva kokuba izingxenye ezibekwe phezu komhlaba seziphinde zageleza. Amaphini ayabambelela ebhodini, enikeza amalunga aqinile afanelekela ukuhlangana okuphindaphindiwe.
• Ama-header afakwa phezulu ziphinde zigeleze kanye nengxenye esele ye-SMT. Ngenxa yokuthi ijoyinti lisebusweni kuphela, i-anchor yomshini iwusizo kunoma iyiphi i-header ezobona ukucindezeleka.
• Amabhodi axubile Ngezingxenye ze-SMT kanye nezingxenye ze-through-hole, qalisa inqubo yokukhweza phezulu, bese ufaka izihloko ze-through-hole, ukugeleza okuvamile kwe-hybrid.

Ukutshela i-assembler yakho ukuthi yimaphi ama-header angena emgodini nokuthi yimaphi afakwa ngaphezulu kwe-surface kuvumela ukuthi bahlele inqubo efanele, ebaluleke kakhulu ngevolumu. Isitolo esihlinzeka ngokuhlanganiswa kwe-PCB okuphezulu okune-reflow kanye ne-selective noma i-wave soldering singakha ibhodi elixubile ngokuhlanzeka nangokuphindaphindwayo.

Cacisa i-header ngesethi yayo ephelele yamapharamitha, uyifanise nomlingani wayo, uyinike indawo efanele kanye nokusekelwa kwemishini, bese ukhetha inqubo yokunamathisela efanelana nayo. Ukwenza kanjalo kuguqula ingxenye ethobekile ibe uxhumano ongaluthemba. Ungafunda kabanzi mayelana ne-Highleap Electronics nokuthi sisingatha kanjani ukuhlanganiswa okuxubile kwemigodi kanye nokufakwa endaweni.

imibuzo ejwayelekile ukubuzwa

Iyiphi indlela evame kakhulu yokushaya i-pin header?

I-2.54 mm (0.1 intshi) iyona ejwayelekile kakhulu futhi ejwayelekile. Kulula ukuyibopha ngesandla futhi ihambisana nohlu olukhulu lwezintambo, amasokhethi, kanye nehadiwe yokubhala. Ama-pitch amahle njenge-2.00, 1.27, kanye ne-1.00 mm agcina isikhala kodwa kunzima ukuwaphatha.

Ingabe kufanele ngisebenzise ama-header angena ngembobo noma afakwa ngaphezulu?

Sebenzisa imbobo edlulayo ezixhumini ezivamise ukuxhunywa noma ezithwala umthwalo womshini, ngoba amaphini ayabambelela ebhodini ukuze aqine. Ama-header afakwa phezulu onge isikhala futhi agcina ibhodi lisebenza ngendlela eyodwa, kodwa engeza i-anchor yomshini uma i-header izobona ukucindezeleka.

Ngingavimba kanjani isixhumi ukuthi singaxhunywanga emuva?

Sebenzisa i-header embozwe futhi enesihluthulelo. I-shelf ivikela futhi iqondise amaphini, kanti ukhiye (isikhala noma i-notch) uvumela i-mate ukuthi ilingane ngendlela eyodwa kuphela. Lokhu kunconywa kakhulu kokufakwa kwamandla, ama-programming ports, kanye nezintambo zeribhoni.

Usayizi wembobo okufanele usetshenziswe yi-header footprint edlulayo?

Landela iphethini yomhlaba enconywe ngumenzi. Imbobo kumele ivumelane nobubanzi bephini kanye nendawo evulekile efanele, ibe nendandatho ehlanganisiwe eyanele, ingaqini kakhulu ukuba ihlale noma ikhululeke kakhulu ukuze ijoyinti eliqinile lihlale. Ukubuyekezwa kwe-DFM ngaphambi kokwenziwa kuqinisekisa ukuthi imbobo ilungile.

Ngingakwazi yini ukuhlanganisa amabhodi amabili anezihloko?

Yebo. Hlanganisa ikhanda lesilisa ebhodini elilodwa elinesokhethi lesifazane kwelinye, bese usetha ukuphakama kwesitaki nge-geometry ekhethiwe. Sekela isitaki ngomshini ngeziphazamiso noma uhlaka ukuze ukudlidliza nokugoba kungalayishi izikhonkwane. Ezimweni ezidinga amandla, isixhumanisi esiqinile singathatha indawo yezixhumi.

Ingabe ama-header e-SMD kanye ne-through-hole athengiswa ngendlela efanayo?

Cha. Ama-header afakwa ngaphezulu aphinde ageleze nezinye izingxenye ze-SMT, kuyilapho ama-header angena ngemigodi egobile egagasi, ekhethiwe, noma ethengiswa ngesandla, ngokuvamile ngemva kokugeleza kabusha. Ebhodini elixubile inqubo ye-SMT iqala ukusebenza, bese kufakwa ama-header angena ngemigodi.

Ingakanani i-pin header engathwala ugesi?

Kuya ngobukhulu bokuxhumana, i-plating, ukuthi zingaki izikhonkwane eziseduze ezilayishiwe, kanye nokwenyuka kwezinga lokushisa okuvunyelwe, ngakho hlola isilinganiso sephini ngayinye yomkhiqizi bese unquma izimo zangempela. Ama-header ajwayelekile angu-2.54 mm alungele amasignali; ngamandla, hlanganisa izikhonkwane eziningana noma sebenzisa isixhumi samandla esizinikele, bese ulinganisa ama-trace okuphakelwa ngokufanele ngesikhathi sokukhiqiza i-PCB.