{"id":6697,"date":"2026-06-19T01:29:25","date_gmt":"2026-06-19T01:29:25","guid":{"rendered":"https:\/\/materialparts.com\/74hc245d-2\/"},"modified":"2026-06-19T01:29:25","modified_gmt":"2026-06-19T01:29:25","slug":"74hc245d-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/74hc245d-2\/","title":{"rendered":"74HC245D"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The 74HC245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs in an SOIC-20 package. It features an output enable (OE, active-LOW) and direction control (DIR) for bidirectional data flow between two 8-bit buses. With \u00b17.8 mA output drive, CMOS low power, and non-inverting 3-state outputs, it is the standard choice for bus interfacing and bidirectional data communication.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Logic Function<\/td>\nOctal bus transceiver, 3-state<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2.0V to 6.0V<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n10 ns typical @ 5V<\/td>\n<\/tr>\n
Output Drive<\/td>\n\u00b17.8 mA @ 5V<\/td>\n<\/tr>\n
Direction Control<\/td>\nDIR pin (A\u2192B or B\u2192A)<\/td>\n<\/tr>\n
Output Enable<\/td>\nOE pin (active-LOW)<\/td>\n<\/tr>\n
Max Frequency<\/td>\n36 MHz<\/td>\n<\/tr>\n
Input Levels<\/td>\nCMOS (74HC245)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-20 (SOT163-1, 12.8\u00d77.5 mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Octal bidirectional bus interface with 3-state outputs<\/li>\n
  • Direction control (DIR): A-to-B or B-to-A<\/li>\n
  • Output enable (OE, active-LOW) for bus isolation<\/li>\n
  • Non-inverting outputs<\/li>\n
  • \u00b17.8 mA output drive at 5V<\/li>\n
  • Input clamp diodes for overvoltage interface<\/li>\n
  • CMOS low power dissipation<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Microprocessor\/microcontroller bus interfacing<\/li>\n
    • Bidirectional data bus communication<\/li>\n
    • Memory and I\/O bus buffering and isolation<\/li>\n
    • Level translation between mixed-voltage buses<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 74HC245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs in an SOIC-20 package. It features an output enable (OE, active-LOW) and direction control (DIR) for bidirectional data flow between two 8-bit buses. With \u00b17.8 mA output drive, CMOS low power, and non-inverting 3-state outputs, it is the standard choice […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[26,13],"tags":[],"chip_brand":[140],"class_list":["post-6697","post","type-post","status-publish","format-standard","hentry","category-digital-signal-processors-dsp","category-integrated-circuits-ics","chip_brand-nexperia"],"acf":{"brief_explanation":"Octal bus transceiver, bidirectional, 3-state, SOIC-20","date_code":"","package_case":"SOIC-20 \/ SOT163-1 (12.8\u00d77.5\u00d72.65 mm, 1.27mm pitch)","in_stock":5000,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/74HC_HCT245.pdf","price":"$0.25 @ 1ku","product_introduction":"The 74HC245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs in an SOIC-20 package. With DIR direction control and OE output enable, \u00b17.8 mA drive, and CMOS low power, it is the standard choice for microprocessor bus interfacing, bidirectional data communication, and memory I\/O bus buffering.","working_principle":"The 74HC245D provides bidirectional data transfer between two 8-bit buses (A and B). The DIR pin controls the data flow direction: when DIR is HIGH, data flows from A to B; when DIR is LOW, data flows from B to A. The OE pin (active-LOW) controls the output enable: when OE is HIGH, all outputs enter high-impedance state, effectively isolating the two buses. When OE is LOW, data flows in the direction selected by DIR. The eight transceiver channels are non-inverting and provide 3-state outputs for bus sharing. Multiple 74HC245Ds can share a common bus using OE-based arbitration. The input clamp diodes protect against voltages exceeding VCC.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>DIR<\/td>Input<\/td>Direction control (HIGH=A\u2192B, LOW=B\u2192A)<\/td><\/tr>\n
      2-9<\/td>A0-A7<\/td>I\/O<\/td>Bus A data (bidirectional)<\/td><\/tr>\n
      10<\/td>GND<\/td>Power<\/td>Ground (0V)<\/td><\/tr>\n
      11-18<\/td>B0-B7<\/td>I\/O<\/td>Bus B data (bidirectional)<\/td><\/tr>\n
      19<\/td>OE<\/td>Input<\/td>Output enable (active LOW)<\/td><\/tr>\n
      20<\/td>VCC<\/td>Power<\/td>Supply voltage (2.0-6.0V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Microprocessor\/microcontroller bidirectional bus interfacing<\/li>\n
      • Data bus communication between subsystems<\/li>\n
      • Memory and I\/O bus buffering and isolation<\/li>\n
      • Level translation between mixed-voltage buses<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Nexperia<\/td>74HCT245D<\/td>SOIC-20<\/td>TTL input levels (4.5-5.5V)<\/td><\/tr>\n
        TI<\/td>SN74HC245DW<\/td>SOIC-20<\/td>Functionally equivalent<\/td><\/tr>\n
        ON Semi<\/td>MC74HC245ADWR2G<\/td>SOIC-20<\/td>Functionally equivalent<\/td><\/tr>\n
        Nexperia<\/td>74HC245PW<\/td>TSSOP-20<\/td>Smaller footprint<\/td><\/tr>\n
        Nexperia<\/td>74HC640D<\/td>SOIC-20<\/td>Inverting transceiver version<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=6697"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6697\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6697"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6697"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}