{"id":3006,"date":"2026-05-29T04:38:49","date_gmt":"2026-05-29T04:38:49","guid":{"rendered":"https:\/\/materialparts.com\/sn74hc245pwr\/"},"modified":"2026-05-29T06:56:18","modified_gmt":"2026-05-29T06:56:18","slug":"sn74hc245pwr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74hc245pwr\/","title":{"rendered":"SN74HC245PWR"},"content":{"rendered":"

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

The Texas Instruments SN74HC245PWR is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. Packaged in a 20-pin TSSOP (PW), it operates over a wide 2 V to 6 V supply range with typical propagation delay of 12 ns. The DIR and OE control pins provide flexible bus direction and output enable management.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n8<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2 V ~ 6 V<\/td>\n<\/tr>\n
Propagation Delay (tpd)<\/td>\n12 ns typical<\/td>\n<\/tr>\n
Output Drive Current<\/td>\n\u00b16 mA at 5 V<\/td>\n<\/tr>\n
IOL \/ IOH (max)<\/td>\n7.8 mA \/ -7.8 mA<\/td>\n<\/tr>\n
ICC (Supply Current)<\/td>\n80 \u00b5A max<\/td>\n<\/tr>\n
Input Current<\/td>\n1 \u00b5A max<\/td>\n<\/tr>\n
\u8f93\u5165\u7c7b\u578b<\/td>\nCMOS<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nCMOS, 3-State<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTSSOP-20 (PW) (6.5\u00d76.4 mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide operating voltage range: 2 V to 6 V<\/li>\n
  • High-current 3-state outputs can drive bus lines directly or up to 15 LSTTL loads<\/li>\n
  • Low power consumption: 80 \u00b5A max ICC<\/li>\n
  • Typical propagation delay of 12 ns for high-speed data transfer<\/li>\n
  • Balanced outputs and positive input clamp diodes<\/li>\n
  • Direction control (DIR) and output enable (OE) for flexible bus management<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Microprocessor and microcontroller bus interface<\/li>\n
    • Memory bank switching and data routing<\/li>\n
    • Level translation between voltage domains<\/li>\n
    • Buffer and line driver for data buses<\/li>\n
    • Industrial communication and control systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Texas Instruments SN74HC245PWR is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. Packaged in a 20-pin TSSOP (PW), it operates over a wide 2 V to 6 V supply range with typical propagation delay of 12 ns. The DIR and OE control pins provide flexible […]<\/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-3006","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Octal bus transceiver, 3-state outputs, 2-6V, 12ns tpd, TSSOP-20","date_code":"","package_case":"TSSOP-20 (6.5\u00d76.4 mm)","in_stock":2638,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74hc245.pdf","price":"$0.252 @ 1ku","product_introduction":"The SN74HC245PWR from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. The device is part of the 74HC (High-Speed CMOS) logic family, offering a wide operating voltage range from 2 V to 6 V. The control function implementation minimizes external timing requirements. Data transmission direction is controlled by the DIR input, while the active-low OE (output enable) input can disable the device to effectively isolate the buses. The 3-state outputs can drive bus lines directly or up to 15 LSTTL loads, making this device ideal for buffering and bus driving in microprocessor systems.","working_principle":"The SN74HC245PWR contains eight bidirectional transceiver channels organized as A-bus and B-bus pairs. The DIR pin determines 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 active-low OE pin controls the output state: when OE is low, the selected direction outputs are active; when OE is high, both A and B outputs are placed in a high-impedance (3-state) state, effectively disconnecting the device from both buses. The internal CMOS structure uses complementary N-channel and P-channel transistors to achieve low static power consumption (80 \u00b5A max) while providing balanced output drive capability of \u00b16 mA at 5 V. Positive input clamp diodes protect the inputs from electrostatic discharge and voltage overshoot.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>DIR<\/td>Input<\/td>Direction control: H = A\u2192B, L = B\u2192A<\/td><\/tr>
      2-9<\/td>A1-A8<\/td>I\/O<\/td>A-bus data lines (bidirectional)<\/td><\/tr>
      10<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      11-18<\/td>B8-B1<\/td>I\/O<\/td>B-bus data lines (bidirectional)<\/td><\/tr>
      19<\/td>OE<\/td>Input<\/td>Output enable (active low)<\/td><\/tr>
      20<\/td>VCC<\/td>Power<\/td>Supply voltage (2-6V)<\/td><\/tr><\/table>","application_scenarios":"
      • Microprocessor bus interface: Bidirectional buffering between CPU data bus and peripheral devices with direction control<\/li>
      • Memory bank switching: Isolating and selecting between multiple memory banks using OE for bank enable<\/li>
      • Level translation: Translating logic signals between 3.3V and 5V domains in mixed-voltage systems<\/li>
      • Data acquisition systems: Buffering ADC\/DAC data buses to isolate sensitive analog circuitry from digital noise<\/li>
      • Industrial backplane: Driving and receiving data on shared backplane buses with 3-state isolation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>SN74HCT245PWR<\/td>TSSOP-20<\/td>HCT version, TTL-compatible inputs (4.5-5.5V)<\/td><\/tr>
        TI<\/td>SN74AHC245PWR<\/td>TSSOP-20<\/td>AHC version, faster (2-5.5V)<\/td><\/tr>
        Nexperia<\/td>74HC245PW<\/td>TSSOP-20<\/td>Direct equivalent from Nexperia<\/td><\/tr>
        TI<\/td>SN74LVC245APWR<\/td>TSSOP-20<\/td>LVC version, 1.65-3.6V, higher drive<\/td><\/tr>
        Diodes Inc<\/td>74HC245S<\/td>SOIC-20<\/td>Direct equivalent in SOIC package<\/td><\/tr>
        onsemi<\/td>MC74HC245ADWR2G<\/td>SOIC-20<\/td>Equivalent with automotive-grade option<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3006","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=3006"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3006\/revisions"}],"predecessor-version":[{"id":3021,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3006\/revisions\/3021"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3006"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}