{"id":6788,"date":"2026-06-21T12:24:43","date_gmt":"2026-06-21T12:24:43","guid":{"rendered":"https:\/\/materialparts.com\/74hc138pw118\/"},"modified":"2026-06-21T12:24:43","modified_gmt":"2026-06-21T12:24:43","slug":"74hc138pw118","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/74hc138pw118\/","title":{"rendered":"74HC138PW,118"},"content":{"rendered":"

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

The 74HC138PW,118 from Nexperia is a 3-to-8 line decoder\/demultiplexer with inverting outputs in a 16-pin TSSOP package, featuring three enable inputs for easy cascading.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\n3-to-8 Line Decoder\/Demultiplexer<\/td>\n<\/tr>\n
\u903b\u8f91\u5bb6\u65cf<\/td>\n74HC (CMOS)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.0 V to 6.0 V<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n12 ns (typical)<\/td>\n<\/tr>\n
Output Drive<\/td>\n+\/-5.2 mA<\/td>\n<\/tr>\n
Enable Inputs<\/td>\n2 active LOW (E1, E2), 1 active HIGH (E3)<\/td>\n<\/tr>\n
Outputs<\/td>\n8 active LOW (Y0-Y7)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTSSOP-16<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +125C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 3-to-8 line decoding with active LOW outputs<\/li>\n
  • Three enable inputs for easy parallel expansion<\/li>\n
  • Demultiplexing capability<\/li>\n
  • Ideal for memory chip select decoding<\/li>\n
  • ESD protection exceeds 2000 V HBM<\/li>\n
  • Wide 2.0 V to 6.0 V supply range<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Memory chip select decoding<\/li>\n
    • I\/O port address decoding<\/li>\n
    • Data demultiplexing<\/li>\n
    • Clock distribution networks<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 74HC138PW,118 from Nexperia is a 3-to-8 line decoder\/demultiplexer with inverting outputs in a 16-pin TSSOP package, featuring three enable inputs for easy cascading. Key Specifications Type 3-to-8 Line Decoder\/Demultiplexer Logic Family 74HC (CMOS) Supply Voltage 2.0 V to 6.0 V Propagation Delay 12 ns (typical) Output Drive +\/-5.2 mA Enable Inputs 2 […]<\/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":[13,20],"tags":[],"chip_brand":[140],"class_list":["post-6788","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-nexperia"],"acf":{"brief_explanation":"3-to-8 Decoder\/Demux, Inverting, 2-6V, 12ns, TSSOP-16","date_code":"","package_case":"TSSOP-16 (5.0 x 4.4 x 1.1 mm)","in_stock":12543,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/74HC138_HCT138.pdf","price":"$0.12 @ 1ku","product_introduction":"The 74HC138PW,118 from Nexperia is a high-speed 3-to-8 line decoder\/demultiplexer with inverting outputs. The device accepts three binary-weighted address inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active LOW outputs (Y0 to Y7). Three enable inputs (two active LOW E1 and E2, one active HIGH E3) allow easy parallel expansion to a 1-of-32 decoder using four devices and one inverter. The 74HC138 can also function as an eight-output demultiplexer by using one enable input as the data input. The TSSOP-16 package provides a compact footprint for space-constrained designs.","working_principle":"The 74HC138PW decodes a 3-bit binary address to activate one of eight outputs. The three address inputs (A0, A1, A2) select which output Yn goes LOW. All outputs remain HIGH unless the device is enabled (E1=LOW, E2=LOW, E3=HIGH). When enabled, the selected output corresponding to the binary address goes LOW while all other outputs remain HIGH. This implements the 3-to-8 decoding function. For demultiplexer operation, the data signal is applied to one of the active-LOW enable inputs while the other enables are held at their active states. The data is then routed to the output selected by the address inputs. The multiple enable inputs facilitate cascading: four 74HC138 devices plus one inverter create a 5-to-32 decoder without additional logic.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>A0<\/td>Input<\/td>Address input LSB<\/td><\/tr>
      2<\/td>A1<\/td>Input<\/td>Address input<\/td><\/tr>
      3<\/td>A2<\/td>Input<\/td>Address input MSB<\/td><\/tr>
      4<\/td>E1<\/td>Input<\/td>Enable 1 (active LOW)<\/td><\/tr>
      5<\/td>E2<\/td>Input<\/td>Enable 2 (active LOW)<\/td><\/tr>
      6<\/td>E3<\/td>Input<\/td>Enable 3 (active HIGH)<\/td><\/tr>
      7,9,10,11,12,13,14,15<\/td>Y7-Y0<\/td>Output<\/td>Decoded outputs (active LOW)<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      16<\/td>VCC<\/td>Power<\/td>Supply voltage (2.0-6.0V)<\/td><\/tr><\/table>","application_scenarios":"
      • Memory bank chip select decoding in multi-bank SRAM systems<\/li>
      • I\/O port address decoding for 8 peripheral devices<\/li>
      • Clock demultiplexing to distribute one clock to 8 targets<\/li>
      • 1-of-32 decoder expansion using four cascaded devices<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Nexperia<\/td>74HCT138PW<\/td>TSSOP-16<\/td>TTL input levels<\/td><\/tr>
        TI<\/td>SN74HC138PWR<\/td>TSSOP-16<\/td>Pin-compatible<\/td><\/tr>
        onsemi<\/td>MC74HC138ADTR2G<\/td>TSSOP-16<\/td>Pin-compatible<\/td><\/tr>
        Nexperia<\/td>74HC138D<\/td>SOIC-16<\/td>Same function, wider package<\/td><\/tr>
        Nexperia<\/td>74HC238PW<\/td>TSSOP-16<\/td>Non-inverting outputs<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6788","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=6788"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6788\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6788"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}