{"id":10475,"date":"2026-07-20T04:13:28","date_gmt":"2026-07-20T04:13:28","guid":{"rendered":"https:\/\/ic-vendor.com\/74hc238d\/"},"modified":"2026-07-20T04:13:28","modified_gmt":"2026-07-20T04:13:28","slug":"74hc238d","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/74hc238d\/","title":{"rendered":"74HC238D"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The Nexperia 74HC238D is a 3-to-8 line decoder\/demultiplexer with 3-state outputs in an SO16 package. It accepts a 3-bit binary input and activates one of eight outputs. The device features three enable inputs for easy cascading and expansion, operating from 2.0 V to 6.0 V.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/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
\u0639\u0627\u0626\u0644\u0629 \u0627\u0644\u0645\u0646\u0637\u0642<\/td>\n74HC (CMOS)<\/td>\n<\/tr>\n
Decoding<\/td>\n3-to-8 line<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n15 ns (typical at 4.5V)<\/td>\n<\/tr>\n
Output Drive<\/td>\n\u00b15.2 mA<\/td>\n<\/tr>\n
Enable Inputs<\/td>\n3 (2 active HIGH, 1 active LOW)<\/td>\n<\/tr>\n
Number of Outputs<\/td>\n8 (active HIGH)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 3-to-8 line decoder\/demultiplexer with active HIGH outputs<\/li>\n
  • Three enable inputs for cascading and expansion<\/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
  • Complies with JEDEC standards<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Memory address decoding<\/li>\n
    • Demultiplexing in digital data routing<\/li>\n
    • Chip select signal generation<\/li>\n
    • Display digit selection circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Nexperia 74HC238D is a 3-to-8 line decoder\/demultiplexer with 3-state outputs in an SO16 package. It accepts a 3-bit binary input and activates one of eight outputs. The device features three enable inputs for easy cascading and expansion, operating from 2.0 V to 6.0 V. Key Specifications Supply Voltage (VCC) 2.0 V to […]<\/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":[1780],"chip_brand":[168],"class_list":["post-10475","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","tag-74hc238d","chip_brand-nxp"],"acf":{"brief_explanation":"3-to-8 line decoder\/demultiplexer, active HIGH outputs, 3 enable inputs, 2.0-6.0V, SO16, cascading","date_code":"","package_case":"SO16 (SOT109-1) 10.0 x 3.9 x 1.75 mm","in_stock":7326,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/74HC_HCT238.pdf","price":"$0.15 @ 1ku","product_introduction":"The Nexperia 74HC238D is a 3-to-8 line decoder\/demultiplexer with active HIGH outputs in an SO16 package. The device accepts a 3-bit binary address on inputs A0, A1, and A2, and activates the corresponding one of eight outputs (Y0 to Y7). Three enable inputs are provided \u2014 two active HIGH (E1, E2) and one active LOW (E3) \u2014 allowing easy cascading for larger decoder configurations such as 4-to-16 or 5-to-32 line decoders. The device operates from 2.0V to 6.0V with CMOS low power dissipation and high noise immunity. Input clamp diodes enable interfacing to voltages in excess of VCC. The device is specified from -40\u00b0C to +125\u00b0C and complies with JEDEC standards.","working_principle":"The 74HC238D decodes a 3-bit binary input (A0-A2) into one of eight mutually exclusive active HIGH outputs (Y0-Y7). An internal 3-to-8 decoder logic network uses the binary input to select which output goes HIGH while all others remain LOW. The enable logic combines three enable inputs: E1 and E2 (active HIGH) and E3 (active LOW). The decoder is active only when E1=HIGH, E2=HIGH, and E3=LOW. If any enable condition is not met, all outputs are forced LOW regardless of the address inputs. This enable structure simplifies cascading \u2014 for example, two 74HC238 devices can form a 4-to-16 decoder by using the fourth address bit to control the enable inputs. The CMOS implementation ensures low static power consumption with rail-to-rail output swing.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>A0<\/td>Input<\/td>Address input bit 0 (LSB)<\/td><\/tr>\n
      2<\/td>A1<\/td>Input<\/td>Address input bit 1<\/td><\/tr>\n
      3<\/td>A2<\/td>Input<\/td>Address input bit 2 (MSB)<\/td><\/tr>\n
      4<\/td>E3<\/td>Input<\/td>Enable input (active LOW)<\/td><\/tr>\n
      5<\/td>E2<\/td>Input<\/td>Enable input (active HIGH)<\/td><\/tr>\n
      6<\/td>E1<\/td>Input<\/td>Enable input (active HIGH)<\/td><\/tr>\n
      7<\/td>Y7<\/td>Output<\/td>Decoded output 7 (active HIGH)<\/td><\/tr>\n
      8<\/td>GND<\/td>Power<\/td>Ground (0 V)<\/td><\/tr>\n
      9<\/td>Y6<\/td>Output<\/td>Decoded output 6 (active HIGH)<\/td><\/tr>\n
      10<\/td>Y5<\/td>Output<\/td>Decoded output 5 (active HIGH)<\/td><\/tr>\n
      11<\/td>Y4<\/td>Output<\/td>Decoded output 4 (active HIGH)<\/td><\/tr>\n
      12<\/td>Y3<\/td>Output<\/td>Decoded output 3 (active HIGH)<\/td><\/tr>\n
      13<\/td>Y2<\/td>Output<\/td>Decoded output 2 (active HIGH)<\/td><\/tr>\n
      14<\/td>Y1<\/td>Output<\/td>Decoded output 1 (active HIGH)<\/td><\/tr>\n
      15<\/td>Y0<\/td>Output<\/td>Decoded output 0 (active HIGH)<\/td><\/tr>\n
      16<\/td>VCC<\/td>Power<\/td>Supply voltage<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Memory address decoding in microprocessor systems<\/li>\n
      • Chip select generation for multiple peripheral devices<\/li>\n
      • Digital demultiplexing in data routing circuits<\/li>\n
      • Display digit selection in multiplexed LED displays<\/li>\n
      • Industrial control signal distribution<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Texas Instruments<\/td>SN74HC238D<\/td>SOIC-16<\/td>Pin-to-pin compatible<\/td><\/tr>\n
        onsemi<\/td>MC74HC238ADR2G<\/td>SOIC-16<\/td>Equivalent function<\/td><\/tr>\n
        Toshiba<\/td>TC74HC238AP<\/td>DIP-16<\/td>Equivalent function<\/td><\/tr>\n
        Nexperia<\/td>74HCT238D<\/td>SO16<\/td>TTL input level variant<\/td><\/tr>\n
        Nexperia<\/td>74HC138D<\/td>SO16<\/td>Active LOW output variant<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=10475"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10475\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=10475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=10475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=10475"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10475"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}