{"id":6698,"date":"2026-06-19T01:29:27","date_gmt":"2026-06-19T01:29:27","guid":{"rendered":"https:\/\/materialparts.com\/74hct245d-2\/"},"modified":"2026-06-19T01:29:27","modified_gmt":"2026-06-19T01:29:27","slug":"74hct245d-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/74hct245d-2\/","title":{"rendered":"74HCT245D"},"content":{"rendered":"

Productos<\/h2>\n

The 74HCT245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs and TTL-compatible input levels in an SOIC-20 package. Featuring DIR direction control and OE output enable, with \u00b16 mA drive at 5V, it is ideal for bidirectional data communication between TTL and CMOS buses in 5V systems.<\/p>\n

Especificaciones<\/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
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n4.5V to 5.5V (HCT)<\/td>\n<\/tr>\n
Retardo de propagaci\u00f3n<\/td>\n10 ns typical @ 5V<\/td>\n<\/tr>\n
Output Drive<\/td>\n\u00b16 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>\nTTL (74HCT245)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
Paquete<\/td>\nSOIC-20 (SOT163-1, 12.8\u00d77.5 mm)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • TTL-compatible input levels for 5V system interfacing<\/li>\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
  • \u00b16 mA output drive at 5V<\/li>\n
  • CMOS low power with TTL input compatibility<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • 5V microprocessor bus interfacing with TTL logic<\/li>\n
    • Bidirectional data communication in 5V systems<\/li>\n
    • TTL-to-CMOS bus level translation<\/li>\n
    • Memory and I\/O bus buffering in mixed TTL\/CMOS systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 74HCT245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs and TTL-compatible input levels in an SOIC-20 package. Featuring DIR direction control and OE output enable, with \u00b16 mA drive at 5V, it is ideal for bidirectional data communication between TTL and CMOS buses in 5V systems. Key Specifications Logic […]<\/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-6698","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, TTL inputs, SOIC-20","date_code":"","package_case":"SOIC-20 \/ SOT163-1 (12.8\u00d77.5\u00d72.65 mm, 1.27mm pitch)","in_stock":2000,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/74HC_HCT245.pdf","price":"$0.22 @ 1ku","product_introduction":"The 74HCT245D from Nexperia is an octal bidirectional bus transceiver with 3-state outputs and TTL-compatible input levels in an SOIC-20 package. With DIR direction control, OE output enable, and \u00b16 mA drive, it is ideal for bidirectional data communication between TTL and CMOS buses in 5V microprocessor systems.","working_principle":"The 74HCT245D provides bidirectional data transfer between two 8-bit buses (A and B) with TTL-compatible input thresholds. The DIR pin controls data flow direction: HIGH for A\u2192B, LOW for B\u2192A. The OE pin (active-LOW) enables or disables the outputs; when HIGH, both buses are isolated in high-impedance state. The HCT input stage accepts standard TTL logic levels (VIH=2.0V, VIL=0.8V) while the output provides CMOS rail-to-rail swings, making it an effective TTL-to-CMOS bus bridge. The eight non-inverting transceiver channels support 3-state outputs for multi-device bus sharing.","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 (TTL-level 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 (4.5-5.5V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • 5V microprocessor bus interfacing with TTL logic levels<\/li>\n
      • Bidirectional data communication in 5V digital systems<\/li>\n
      • TTL-to-CMOS bus level translation and bridging<\/li>\n
      • Memory and I\/O bus buffering in mixed TTL\/CMOS systems<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Nexperia<\/td>74HC245D<\/td>SOIC-20<\/td>CMOS input levels (2.0-6.0V)<\/td><\/tr>\n
        TI<\/td>SN74HCT245DW<\/td>SOIC-20<\/td>Functionally equivalent<\/td><\/tr>\n
        ON Semi<\/td>MC74HCT245ADWR2G<\/td>SOIC-20<\/td>Functionally equivalent<\/td><\/tr>\n
        Nexperia<\/td>74HCT245PW<\/td>TSSOP-20<\/td>Smaller footprint<\/td><\/tr>\n
        Nexperia<\/td>74HCT640D<\/td>SOIC-20<\/td>Inverting transceiver version<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6698"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6698\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6698"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}