{"id":7961,"date":"2026-06-28T06:10:25","date_gmt":"2026-06-28T06:10:25","guid":{"rendered":"https:\/\/materialparts.com\/sn74ls08n-3\/"},"modified":"2026-06-28T11:45:13","modified_gmt":"2026-06-28T11:45:13","slug":"sn74ls08n-3","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/sn74ls08n-3\/","title":{"rendered":"SN74LS08N"},"content":{"rendered":"

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

The SN74LS08N from Texas Instruments is a quad 2-input positive AND gate with LS TTL technology, 15ns propagation delay, and industry-standard 7408 pinout in a 14-pin PDIP package.<\/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
Number of Gates<\/td>\n4 (quad 2-input AND)<\/td>\n<\/tr>\n
\u0639\u0627\u0626\u0644\u0629 \u0627\u0644\u0645\u0646\u0637\u0642<\/td>\nLS (Low-power Schottky)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n4.75V to 5.25V (5V nominal)<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n15ns typical @ 5V<\/td>\n<\/tr>\n
Output Drive (IOL\/IOH)<\/td>\n8mA \/ -0.4mA<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nPDIP-14 (19.3 x 6.35mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Four independent 2-input AND gates<\/li>\n
  • LS TTL technology<\/li>\n
  • 15ns typical propagation delay<\/li>\n
  • Industry-standard 7408 pinout<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Signal gating (enable with condition)<\/li>\n
    • Address decoding<\/li>\n
    • Clock enabling<\/li>\n
    • Data validation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74LS08N from Texas Instruments is a quad 2-input positive AND gate with LS TTL technology, 15ns propagation delay, and industry-standard 7408 pinout in a 14-pin PDIP package. Key Specifications Number of Gates 4 (quad 2-input AND) Logic Family LS (Low-power Schottky) Supply Voltage 4.75V to 5.25V (5V nominal) Propagation Delay 15ns typical […]<\/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":[138],"class_list":["post-7961","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad 2-input AND gate, LS TTL, 15ns, PDIP-14","date_code":"","package_case":"PDIP-14 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)","in_stock":8000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74ls08.pdf","price":"$0.25 @ 1ku","product_introduction":"The SN74LS08N from Texas Instruments contains four independent 2-input AND gates in a 14-pin PDIP package. Each gate performs Y = A AND B; the output is HIGH only when BOTH inputs are HIGH. The AND gate is fundamental to digital logic: it implements the logical conjunction, the core of conditional enabling. When a data signal must pass only when an enable condition is met, the AND gate is the natural choice. In address decoding, multiple high-order address bits are ANDed to generate a chip select signal. The 7408 is the AND counterpart of the 7400 NAND: same pinout, but non-inverted output. DeMorgan's theorem shows that AND can be built from NAND + inverter, but the dedicated 7408 is simpler and faster. The N suffix denotes the PDIP-14 through-hole package.","working_principle":"Each AND gate in the SN74LS08N performs Y = A AND B. Truth table: 00\u21920, 01\u21920, 10\u21920, 11\u21921. The output is HIGH only when both inputs are HIGH simultaneously. For gating: one input carries the signal (data, clock), the other carries the enable. When enable is HIGH, the signal passes through; when enable is LOW, the output is always LOW regardless of the signal. For active-LOW enabling, use a NAND gate instead. For 3-input AND, cascade: feed the output of one 2-input AND and the third input into another AND gate. For a 4-input AND, use three 2-input AND gates in a tree structure. The AND gate is also used in product-of-sums logic: A AND B = A\u00b7B in Boolean algebra. The 15ns propagation delay means the output responds to input changes within 15ns.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>1A<\/td>Input<\/td>Gate 1 input A<\/td><\/tr>\n
      2<\/td>1B<\/td>Input<\/td>Gate 1 input B<\/td><\/tr>\n
      3<\/td>1Y<\/td>Output<\/td>Gate 1 output (AND)<\/td><\/tr>\n
      4<\/td>2A<\/td>Input<\/td>Gate 2 input A<\/td><\/tr>\n
      5<\/td>2B<\/td>Input<\/td>Gate 2 input B<\/td><\/tr>\n
      6<\/td>2Y<\/td>Output<\/td>Gate 2 output (AND)<\/td><\/tr>\n
      7<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      8<\/td>3Y<\/td>Output<\/td>Gate 3 output (AND)<\/td><\/tr>\n
      9<\/td>3A<\/td>Input<\/td>Gate 3 input A<\/td><\/tr>\n
      10<\/td>3B<\/td>Input<\/td>Gate 3 input B<\/td><\/tr>\n
      11<\/td>4Y<\/td>Output<\/td>Gate 4 output (AND)<\/td><\/tr>\n
      12<\/td>4A<\/td>Input<\/td>Gate 4 input A<\/td><\/tr>\n
      13<\/td>4B<\/td>Input<\/td>Gate 4 input B<\/td><\/tr>\n
      14<\/td>VCC<\/td>Power<\/td>Supply (5V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Clock Gate:<\/strong> Clock signal on input A; enable on input B; output = gated clock; stops when enable=LOW<\/li>\n
      • Address Decode:<\/strong> A15 and A14 \u2192 AND gate; output HIGH only when both address bits are HIGH; chip select for memory range<\/li>\n
      • Data Enable:<\/strong> Data signal on input A; read-enable on input B; output = data only when read-enable is HIGH<\/li>\n
      • 3-Input AND:<\/strong> Output of gate 1 (A AND B) feeds input of gate 2 with C; result = A AND B AND C<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Supply<\/th><\/tr>\n
        74LS08N<\/td>TI\/Nexperia<\/td>Original TTL version with 5V-only supply, typical propagation delay 10-15ns<\/td>DIP-14<\/td>5V TTL<\/td><\/tr>\n
        74LS08D<\/td>TI\/Nexperia<\/td>Surface-mount SOIC version of LS with identical logic function<\/td>SOIC-14<\/td>5V TTL<\/td><\/tr>\n
        74HC08D<\/td>TI\/Nexperia<\/td>CMOS version with wide 2-6V supply range, lower power consumption and higher noise immunity<\/td>SOIC-14<\/td>2-6V CMOS<\/td><\/tr>\n
        74HC08N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of HC family for prototyping and repair<\/td>DIP-14<\/td>2-6V CMOS<\/td><\/tr>\n
        74HCT08D<\/td>TI\/Nexperia<\/td>CMOS with TTL-compatible input levels, ideal for mixing with LS devices at 5V<\/td>SOIC-14<\/td>4.5-5.5V TTL-in<\/td><\/tr>\n
        74HCT08N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of HCT family for prototyping and repair<\/td>DIP-14<\/td>4.5-5.5V TTL-in<\/td><\/tr>\n
        74AC08D<\/td>TI\/Nexperia<\/td>Advanced CMOS with 2-6V supply and higher output drive current (24mA vs 6mA for HC)<\/td>SOIC-14<\/td>2-6V CMOS<\/td><\/tr>\n
        74AC08N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of AC family for prototyping and repair<\/td>DIP-14<\/td>2-6V CMOS<\/td><\/tr>\n
        74LVC08D<\/td>TI\/Nexperia<\/td>Low-voltage CMOS for 1.65-3.6V modern logic with 24mA output drive and bus-hold inputs<\/td>SOIC-14<\/td>1.65-3.6V CMOS<\/td><\/tr>\n
        74LVC08N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of LVC family for prototyping and repair<\/td>DIP-14<\/td>1.65-3.6V CMOS<\/td><\/tr>\n<\/table>\n

        The 7408 is a Quad 2-Input AND Gate. Family variants span from the original LS TTL (5V only) to modern LVC\/AUP (down to 0.8V). HC and HCT versions offer 2-6V CMOS operation with HCT providing TTL-compatible input thresholds for mixed 5V systems. CD4000-series equivalents offer the widest 3-18V supply range at the cost of lower switching speed. DIP packages (N suffix) are through-hole; SOIC (D suffix) and TSSOP are surface-mount.<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=7961"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7961\/revisions"}],"predecessor-version":[{"id":8171,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7961\/revisions\/8171"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7961"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7961"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}