{"id":5164,"date":"2026-06-09T09:04:52","date_gmt":"2026-06-09T09:04:52","guid":{"rendered":"https:\/\/materialparts.com\/sn74ls245n\/"},"modified":"2026-06-09T09:04:52","modified_gmt":"2026-06-09T09:04:52","slug":"sn74ls245n","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74ls245n\/","title":{"rendered":"SN74LS245N"},"content":{"rendered":"

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

The SN74LS245N from Texas Instruments is an octal bus transceiver with 3-state outputs and direction control, designed for asynchronous two-way communication between data buses.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
Bits<\/td>\n8 (octal)<\/td>\n<\/tr>\n
Direction Control<\/td>\nDIR pin<\/td>\n<\/tr>\n
Output Enable<\/td>\nActive low (OE)<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n12 ns typical<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n4.75V to 5.25V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n24 mA sink<\/td>\n<\/tr>\n
Technology<\/td>\n74LS (Low-power Schottky)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPDIP-20<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Octal bidirectional bus transceiver<\/li>\n
  • 3-state outputs<\/li>\n
  • Direction control (DIR)<\/li>\n
  • Output enable (active low)<\/li>\n
  • Non-inverting data path<\/li>\n
  • Standard LS-TTL logic levels<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Microprocessor bus interface<\/li>\n
    • Memory bank switching<\/li>\n
    • Data bus buffering<\/li>\n
    • Board-level bus isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74LS245N from Texas Instruments is an octal bus transceiver with 3-state outputs and direction control, designed for asynchronous two-way communication between data buses. Key Specifications Manufacturer Texas Instruments Bits 8 (octal) Direction Control DIR pin Output Enable Active low (OE) Propagation Delay 12 ns typical Supply Voltage 4.75V to 5.25V Output Current […]<\/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-5164","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Octal bus transceiver, 3-state, DIR control, LS-TTL, PDIP-20","date_code":"","package_case":"PDIP-20 (24.3 x 6.35 mm, 2.54mm pitch)","in_stock":14799,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74ls245.pdf","price":"$0.60 @ 1ku","product_introduction":"The SN74LS245N from Texas Instruments is an octal bidirectional bus transceiver with 3-state outputs, designed for interfacing two data buses. The DIR pin controls data flow direction, while the active-low OE pin enables or disables all outputs. The non-inverting data path makes it ideal for buffering microprocessor buses, memory interfaces, and I\/O port expansion in 5V TTL systems.","working_principle":"The 74LS245 contains eight bidirectional transceiver elements. When OE is LOW and DIR is HIGH, data flows from A to B. When OE is LOW and DIR is LOW, data flows from B to A. When OE is HIGH, both A and B outputs are in high-impedance state, effectively disconnecting the two buses. The LS-TTL Schottky-clamped design provides fast switching with moderate power consumption.","pin_description":"
      Pin Group<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>DIR<\/td>Direction control<\/td><\/tr>
      2-9<\/td>A1-A8<\/td>Bus A I\/O<\/td><\/tr>
      10<\/td>GND<\/td>Ground<\/td><\/tr>
      11-18<\/td>B8-B1<\/td>Bus B I\/O<\/td><\/tr>
      19<\/td>OE<\/td>Output enable (active low)<\/td><\/tr>
      20<\/td>VCC<\/td>5V supply<\/td><\/tr><\/table>","application_scenarios":"
      • Microprocessor data bus buffering<\/li>
      • Memory interface transceivers<\/li>
      • I\/O expansion board isolation<\/li>
      • Multi-master bus arbitration<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Notes<\/th><\/tr>
        TI<\/td>SN74HC245N<\/td>CMOS version (2-6V)<\/td><\/tr>
        TI<\/td>SN74LVC245AN<\/td>3.3V CMOS version<\/td><\/tr>
        Nexperia<\/td>74HC245D<\/td>SOIC version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5164","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=5164"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5164\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5164"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}