{"id":10476,"date":"2026-07-20T04:13:30","date_gmt":"2026-07-20T04:13:30","guid":{"rendered":"https:\/\/ic-vendor.com\/74hc244d\/"},"modified":"2026-07-20T04:13:30","modified_gmt":"2026-07-20T04:13:30","slug":"74hc244d","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/74hc244d\/","title":{"rendered":"74HC244D"},"content":{"rendered":"

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

The Nexperia 74HC244D is an octal buffer\/line driver with 3-state outputs in an SO20 package. It features two 4-bit groups with separate enable controls, operates from 2.0 V to 6.0 V, and provides \u00b16 mA output drive. Ideal for bus driving and signal buffering in digital systems.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Supply Voltage (VCC)<\/td>\n2.0 V to 6.0 V<\/td>\n<\/tr>\n
\u903b\u8f91\u5bb6\u65cf<\/td>\n74HC (CMOS)<\/td>\n<\/tr>\n
Number of Buffers<\/td>\n8 (2 x 4-bit groups)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\n3-state (non-inverting)<\/td>\n<\/tr>\n
Output Drive<\/td>\n\u00b16 mA<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n13 ns (typical at 4.5V)<\/td>\n<\/tr>\n
Enable Inputs<\/td>\n2 (active LOW, one per 4-bit group)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Octal non-inverting buffer\/line driver with 3-state outputs<\/li>\n
  • Two 4-bit groups with separate enable controls<\/li>\n
  • Wide supply voltage range from 2.0 V to 6.0 V<\/li>\n
  • CMOS low power dissipation with high noise immunity<\/li>\n
  • Input clamp diodes for interfacing to voltages above VCC<\/li>\n
  • Non-inverting data path for signal integrity<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Bus buffering and line driving in microprocessor systems<\/li>\n
    • Memory address and data bus drivers<\/li>\n
    • 3-state bus interface for multi-master systems<\/li>\n
    • Signal isolation and buffering<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Nexperia 74HC244D is an octal buffer\/line driver with 3-state outputs in an SO20 package. It features two 4-bit groups with separate enable controls, operates from 2.0 V to 6.0 V, and provides \u00b16 mA output drive. Ideal for bus driving and signal buffering in digital systems. Key Specifications Supply Voltage (VCC) 2.0 […]<\/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":[13],"tags":[1781],"chip_brand":[168],"class_list":["post-10476","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","tag-74hc244d","chip_brand-nxp"],"acf":{"brief_explanation":"Octal non-inverting buffer\/line driver, 3-state, 2x 4-bit groups, 2.0-6.0V, SO20, \u00b16mA drive","date_code":"","package_case":"SO20 (SOT163-1) 12.8 x 5.3 x 1.75 mm","in_stock":6912,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/74HC_HCT244.pdf","price":"$0.28 @ 1ku","product_introduction":"The Nexperia 74HC244D is an octal non-inverting buffer\/line driver with 3-state outputs in an SO20 package. The device is organized as two 4-bit groups, each with its own active LOW output enable input (1OE and 2OE). When the enable input is LOW, the corresponding buffer outputs follow the inputs; when HIGH, the outputs are placed in a high-impedance OFF-state. This organization allows the two 4-bit groups to be controlled independently, providing flexibility for bus-oriented applications. The device operates from 2.0V to 6.0V with \u00b16 mA output drive capability. Input clamp diodes allow interfacing to voltages in excess of VCC using current limiting resistors. The device is specified from -40\u00b0C to +125\u00b0C and complies with JEDEC standards.","working_principle":"The 74HC244D contains eight independent non-inverting buffers divided into two groups of four. Each group is controlled by an active LOW output enable (1OE for group 1, 2OE for group 2). When the enable is LOW, the buffer passes the input signal to the output with minimal propagation delay (13 ns typical at 4.5V). When the enable is HIGH, the output enters a high-impedance 3-state condition, effectively disconnecting the buffer from the bus. This allows multiple 74HC244 devices to share a common bus without contention. The non-inverting architecture preserves signal polarity, making the device suitable for address and data bus buffering. The CMOS implementation provides rail-to-rail output swing with low static power consumption.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>1OE<\/td>Input<\/td>Output enable for group 1 (active LOW)<\/td><\/tr>\n
      2-5<\/td>1A0-1A3<\/td>Input<\/td>Data inputs for group 1<\/td><\/tr>\n
      6<\/td>GND<\/td>Power<\/td>Ground (0 V)<\/td><\/tr>\n
      7-9<\/td>2Y4-2Y6<\/td>Output<\/td>Data outputs for group 2 (bits 4-6)<\/td><\/tr>\n
      10<\/td>2OE<\/td>Input<\/td>Output enable for group 2 (active LOW)<\/td><\/tr>\n
      11<\/td>2OE<\/td>Input<\/td>Output enable for group 2 (active LOW)<\/td><\/tr>\n
      12-15<\/td>1Y3-1Y0<\/td>Output<\/td>Data outputs for group 1<\/td><\/tr>\n
      16-19<\/td>2A3-2A0<\/td>Input<\/td>Data inputs for group 2<\/td><\/tr>\n
      20<\/td>VCC<\/td>Power<\/td>Supply voltage<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Microprocessor address and data bus buffering<\/li>\n
      • Memory interface line driving<\/li>\n
      • 3-state bus interface for multi-master digital systems<\/li>\n
      • Signal isolation between subsystems<\/li>\n
      • Industrial control bus drivers<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Texas Instruments<\/td>SN74HC244D<\/td>SOIC-20<\/td>Pin-to-pin compatible<\/td><\/tr>\n
        onsemi<\/td>MC74HC244ADWR2G<\/td>SOIC-20<\/td>Equivalent function<\/td><\/tr>\n
        Toshiba<\/td>TC74HC244AP<\/td>DIP-20<\/td>Equivalent function<\/td><\/tr>\n
        Nexperia<\/td>74HCT244D<\/td>SO20<\/td>TTL input level variant<\/td><\/tr>\n
        Nexperia<\/td>74HC244PW<\/td>TSSOP20<\/td>Same function, TSSOP package<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10476"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10476\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10476"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}