{"id":3688,"date":"2026-06-08T02:02:10","date_gmt":"2026-06-08T02:02:10","guid":{"rendered":"https:\/\/materialparts.com\/sn74hc245dwr\/"},"modified":"2026-06-08T02:02:10","modified_gmt":"2026-06-08T02:02:10","slug":"sn74hc245dwr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74hc245dwr\/","title":{"rendered":"SN74HC245DWR"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The SN74HC245DWR from Texas Instruments is an octal bus transceiver with 3-state outputs providing bidirectional data communication between buses. It features direction control, output enable, 12ns propagation delay, and operates from 2V to 6V in a 20-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u529f\u80fd<\/td>\nOctal Bus Transceiver<\/td>\n<\/tr>\n
\u6e20\u9053<\/td>\n8<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2V to 6V<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n12ns (typ)<\/td>\n<\/tr>\n
Output Drive<\/td>\n+\/-6mA @ 5V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\n3 \u5dde<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-20<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide operating voltage range: 2V to 6V<\/li>\n
  • High-current 3-state outputs drive bus lines directly<\/li>\n
  • Low power consumption: 80uA max ICC<\/li>\n
  • Typical propagation delay of 12ns<\/li>\n
  • Direction control (DIR) and output enable (OE)<\/li>\n
  • Non-inverting data path<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Microprocessor bus interfacing<\/li>\n
    • Memory address\/data bus buffering<\/li>\n
    • Level translation between voltage domains<\/li>\n
    • Data acquisition system bus isolation<\/li>\n
    • Industrial control bus driving<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74HC245DWR from Texas Instruments is an octal bus transceiver with 3-state outputs providing bidirectional data communication between buses. It features direction control, output enable, 12ns propagation delay, and operates from 2V to 6V in a 20-pin SOIC package. Key Specifications Function Octal Bus Transceiver Channels 8 Supply Voltage 2V to 6V Propagation […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[138],"class_list":["post-3688","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Octal 3-state bus transceiver, 2-6V, 12ns tpd, +\/-6mA drive, SOIC-20","date_code":"","package_case":"SOIC-20 (12.8 x 10.3 x 2.45 mm)","in_stock":6162,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74hc245.pdf","price":"$0.57 @ 1ku","product_introduction":"The SN74HC245DWR from Texas Instruments is an octal bus transceiver with 3-state outputs designed for asynchronous bidirectional communication between data buses. The device allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device, effectively isolating the buses. With a wide operating voltage range of 2V to 6V, the device is compatible with both 3.3V and 5V systems. The high-current 3-state outputs can drive bus lines directly or up to 15 LSTTL loads. Low power consumption of 80uA maximum ICC makes it suitable for power-sensitive applications. The device features a typical propagation delay of 12ns and non-inverting data path. It is available in a 20-pin SOIC package rated for -40 to 85 C operation.","working_principle":"The SN74HC245DWR operates as a bidirectional bus switch with tri-state outputs. Key subsystems include: (1) Direction Control Logic - the DIR input selects whether data flows from A-to-B (DIR=HIGH) or B-to-A (DIR=LOW); (2) Output Enable Logic - the active-low OE input controls the 3-state output buffers; when OE is HIGH, all outputs are high-impedance, isolating the buses; (3) Eight Bidirectional Channels - each channel consists of a pair of tri-state buffers with complementary enable logic ensuring only one direction is active at a time; (4) Input Clamp Diodes - provide protection against voltage overshoot and enable interfacing with voltages exceeding VCC through current-limiting resistors. The non-inverting architecture preserves data polarity through the transceiver.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>DIR<\/td>Input<\/td>Direction control (HIGH: A to B, LOW: B to A)<\/td><\/tr>
      2-9<\/td>A1-A8<\/td>I\/O<\/td>Bus A data input\/output lines<\/td><\/tr>
      10<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      11-18<\/td>B8-B1<\/td>I\/O<\/td>Bus B data input\/output lines<\/td><\/tr>
      19<\/td>OE<\/td>Input<\/td>Output enable (active low)<\/td><\/tr>
      20<\/td>VCC<\/td>Power<\/td>Power supply (2V to 6V)<\/td><\/tr><\/table>","application_scenarios":"
      • Microprocessor system bus buffering and bidirectional data transfer<\/li>
      • Memory interface address\/data bus driving<\/li>
      • Voltage level translation between 3.3V and 5V domains<\/li>
      • Industrial control system bus isolation and multiplexing<\/li>
      • Data acquisition front-end bus switching<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Nexperia<\/td>74HC245D<\/td>SOIC-20<\/td>Pin-compatible equivalent<\/td><\/tr>
        ON Semiconductor<\/td>MC74HC245DWG<\/td>SOIC-20<\/td>Pin-compatible equivalent<\/td><\/tr>
        Texas Instruments<\/td>SN74LVC245APWR<\/td>TSSOP-20<\/td>1.65-3.6V, 24mA drive<\/td><\/tr>
        Nexperia<\/td>74LVC245APW<\/td>TSSOP-20<\/td>Low voltage, higher drive<\/td><\/tr>
        Texas Instruments<\/td>SN74HCT245DWR<\/td>SOIC-20<\/td>TTL input compatible<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=3688"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3688\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3688"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}