{"id":7959,"date":"2026-06-28T06:10:23","date_gmt":"2026-06-28T06:10:23","guid":{"rendered":"https:\/\/materialparts.com\/sn74ls283n-2\/"},"modified":"2026-06-28T11:45:16","modified_gmt":"2026-06-28T11:45:16","slug":"sn74ls283n-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74ls283n-2\/","title":{"rendered":"SN74LS283N"},"content":{"rendered":"

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

The SN74LS283N from Texas Instruments is a 4-bit binary full adder with fast carry, performing 4-bit addition in a single 24ns cycle in a 16-pin PDIP package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n
\u529f\u80fd<\/td>\n4-bit binary full adder with fast carry<\/td>\n<\/tr>\n
\u903b\u8f91\u5bb6\u65cf<\/td>\nLS (Low-power Schottky)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n4.75V to 5.25V (5V nominal)<\/td>\n<\/tr>\n
Addition Time<\/td>\n24ns typical (16-bit using 4 cascaded chips)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPDIP-16 (19.3 x 6.35mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 4-bit parallel addition in one IC<\/li>\n
  • Internal fast carry lookahead<\/li>\n
  • Cascadable for wider additions<\/li>\n
  • C0 input for multi-byte arithmetic<\/li>\n
  • C4 output for carry propagation<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Arithmetic logic unit (ALU)<\/li>\n
    • Address calculation<\/li>\n
    • Digital signal processing<\/li>\n
    • Binary counter\/multiplier building block<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74LS283N from Texas Instruments is a 4-bit binary full adder with fast carry, performing 4-bit addition in a single 24ns cycle in a 16-pin PDIP package. Key Specifications Function 4-bit binary full adder with fast carry Logic Family LS (Low-power Schottky) Supply Voltage 4.75V to 5.25V (5V nominal) Addition Time 24ns 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-7959","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"4-bit binary full adder, fast carry, LS TTL, PDIP-16","date_code":"","package_case":"PDIP-16 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)","in_stock":3000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74ls283.pdf","price":"$0.60 @ 1ku","product_introduction":"The SN74LS283N from Texas Instruments is a 4-bit binary full adder that adds two 4-bit numbers (A0-A3 and B0-B3) plus a carry-in (C0) and produces a 4-bit sum (\u03a30-\u03a33) plus a carry-out (C4). The internal fast carry lookahead generates the C4 output without waiting for the carry to ripple through all four stages, making the 4-bit addition time only 24ns. For wider additions, the C4 output of one 74283 connects to the C0 input of the next, creating an 8-bit adder with two chips, or a 16-bit adder with four chips. The 74283 is the building block of arithmetic logic units (ALUs) in simple processors and digital signal processing systems. The N suffix denotes the PDIP-16 through-hole package.","working_principle":"The SN74LS283N adds A[3:0] + B[3:0] + C0 and outputs \u03a3[3:0] + C4. Internally, it uses carry lookahead logic: instead of computing each bit's carry sequentially (ripple carry), it generates all carries simultaneously using the generate (G) and propagate (P) signals. Gi = Ai AND Bi (stage i generates a carry); Pi = Ai XOR Bi (stage i propagates an incoming carry). The carry at each stage is: Ci+1 = Gi OR (Pi AND Ci). For a 4-bit adder: C1 = G0 + P0\u00b7C0, C2 = G1 + P1\u00b7G0 + P1\u00b7P0\u00b7C0, C3 = G2 + P2\u00b7G1 + P2\u00b7P1\u00b7G0 + P2\u00b7P1\u00b7P0\u00b7C0, C4 = G3 + P3\u00b7G2 + P3\u00b7P2\u00b7G1 + P3\u00b7P2\u00b7P1\u00b7G0 + P3\u00b7P2\u00b7P1\u00b7P0\u00b7C0. This reduces the carry propagation from 4 gate delays (ripple) to 2 gate delays (lookahead), enabling the 24ns total addition time. The sum at each bit is: \u03a3i = Pi XOR Ci. For subtraction (A\u2212B), complement B and add 1 (set C0=1): A \u2212 B = A + NOT(B) + 1.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>C0<\/td>Input<\/td>Carry input (from lower-order adder or 0\/1)<\/td><\/tr>\n
      2<\/td>\u03a31<\/td>Output<\/td>Sum bit 1 (2^1)<\/td><\/tr>\n
      3<\/td>A1<\/td>Input<\/td>Input A bit 1<\/td><\/tr>\n
      4<\/td>B1<\/td>Input<\/td>Input B bit 1<\/td><\/tr>\n
      5<\/td>A2<\/td>Input<\/td>Input A bit 2<\/td><\/tr>\n
      6<\/td>B2<\/td>Input<\/td>Input B bit 2<\/td><\/tr>\n
      7<\/td>VCC<\/td>Power<\/td>Supply (5V)<\/td><\/tr>\n
      8<\/td>\u03a33<\/td>Output<\/td>Sum bit 3 (2^3)<\/td><\/tr>\n
      9<\/td>\u03a34<\/td>Output<\/td>Sum bit 4 (2^4, or C4 in some pinouts)<\/td><\/tr>\n
      10<\/td>A4<\/td>Input<\/td>Input A bit 4 (MSB)<\/td><\/tr>\n
      11<\/td>B4<\/td>Input<\/td>Input B bit 4 (MSB)<\/td><\/tr>\n
      12<\/td>\u03a32<\/td>Output<\/td>Sum bit 2 (2^2)<\/td><\/tr>\n
      13<\/td>A3<\/td>Input<\/td>Input A bit 3<\/td><\/tr>\n
      14<\/td>B3<\/td>Input<\/td>Input B bit 3<\/td><\/tr>\n
      15<\/td>\u03a30<\/td>Output<\/td>Sum bit 0 (LSB)<\/td><\/tr>\n
      16<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • 4-Bit Adder:<\/strong> Two 4-bit inputs A[3:0] and B[3:0]; C0=0; output \u03a3[3:0] + C4; 0+0=0 to 15+15=30 (C4=1, \u03a3=14)<\/li>\n
      • 8-Bit Adder:<\/strong> Two 74283 chips; low chip C4 \u2192 high chip C0; adds 8-bit numbers in ~50ns<\/li>\n
      • Subtractor:<\/strong> A \u2212 B: connect B inputs through inverters (74LS04); set C0=1; result = A + NOT(B) + 1 = A \u2212 B<\/li>\n
      • Incrementer:<\/strong> Set B=0001 and C0=0; result = A + 1; useful for program counters<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Supply<\/th><\/tr>\n
        74LS283N<\/td>TI\/Nexperia<\/td>Original TTL version with 5V-only supply, typical propagation delay 10-15ns<\/td>DIP-16<\/td>5V TTL<\/td><\/tr>\n
        74LS283D<\/td>TI\/Nexperia<\/td>Surface-mount SOIC version of LS with identical logic function<\/td>SOIC-16<\/td>5V TTL<\/td><\/tr>\n
        74HC283D<\/td>TI\/Nexperia<\/td>CMOS version with wide 2-6V supply range, lower power consumption and higher noise immunity<\/td>SOIC-16<\/td>2-6V CMOS<\/td><\/tr>\n
        74HC283N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of HC family for prototyping and repair<\/td>DIP-16<\/td>2-6V CMOS<\/td><\/tr>\n
        74HCT283D<\/td>TI\/Nexperia<\/td>CMOS with TTL-compatible input levels, ideal for mixing with LS devices at 5V<\/td>SOIC-16<\/td>4.5-5.5V TTL-in<\/td><\/tr>\n
        74HCT283N<\/td>TI\/Nexperia<\/td>Through-hole DIP version of HCT family for prototyping and repair<\/td>DIP-16<\/td>4.5-5.5V TTL-in<\/td><\/tr>\n<\/table>\n

        The 74283 is a 4-Bit Binary Full Adder. 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\/zh\/wp-json\/wp\/v2\/posts\/7959","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=7959"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7959\/revisions"}],"predecessor-version":[{"id":8173,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7959\/revisions\/8173"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7959"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}