{"id":8006,"date":"2026-06-28T06:38:20","date_gmt":"2026-06-28T06:38:20","guid":{"rendered":"https:\/\/materialparts.com\/cd4028be\/"},"modified":"2026-06-28T11:44:05","modified_gmt":"2026-06-28T11:44:05","slug":"cd4028be","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/cd4028be\/","title":{"rendered":"CD4028BE"},"content":{"rendered":"

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

The CD4028BE from Texas Instruments is a BCD-to-decimal decoder that converts a 4-bit BCD input to one-of-ten active-HIGH outputs \u2014 the CMOS counterpart of the 7442 with inverted output polarity, in a 16-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\n\n
\u0627\u0644\u0648\u0638\u064a\u0641\u0629<\/td>\nBCD-to-decimal decoder (4-line to 10-line)<\/td>\n<\/tr>\n
Technology<\/td>\nCD4000B CMOS<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3V to 18V<\/td>\n<\/tr>\n
Inputs<\/td>\nA, B, C, D (4-bit BCD)<\/td>\n<\/tr>\n
Outputs<\/td>\n0-9 (active-HIGH, mutually exclusive)<\/td>\n<\/tr>\n
Invalid Input<\/td>\nAll outputs LOW for BCD 10-15<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n150-250ns typical @ VDD=10V<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55 \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
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nPDIP-16 (19.3 x 9.4mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • BCD to one-of-ten active-HIGH decoding<\/li>\n
  • All outputs LOW for invalid BCD codes (10-15)<\/li>\n
  • Can also serve as 3-to-8 decoder (D=LOW)<\/li>\n
  • 3V-18V wide supply range<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • BCD display decoding<\/li>\n
    • Decimal output selection<\/li>\n
    • Code validation<\/li>\n
    • Digital meter displays<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CD4028BE from Texas Instruments is a BCD-to-decimal decoder that converts a 4-bit BCD input to one-of-ten active-HIGH outputs \u2014 the CMOS counterpart of the 7442 with inverted output polarity, in a 16-pin PDIP package. Key Specifications Function BCD-to-decimal decoder (4-line to 10-line) Technology CD4000B CMOS Supply Voltage 3V to 18V Inputs A, […]<\/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-8006","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"BCD-to-decimal decoder, active-HIGH outputs, CMOS 3-18V, PDIP-16","date_code":"","package_case":"PDIP-16 (19.3 x 9.4 x 4.57mm, 2.54mm pitch, through-hole)","in_stock":3000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/cd4028b.pdf","price":"$0.50 @ 1ku","product_introduction":"The CD4028BE from Texas Instruments is a BCD-to-decimal decoder that converts a 4-bit BCD input into one-of-ten active-HIGH outputs. It is the CMOS equivalent of the TTL 7442, but with an important polarity difference: the CD4028 outputs are active-HIGH (the selected output goes HIGH), while the 7442 outputs are active-LOW (the selected output goes LOW). The active-HIGH outputs make the CD4028 more convenient for directly driving indicators, relay drivers, and high-side switches. For invalid BCD codes (10-15), all outputs remain LOW. As a 3-to-8 decoder: tie D (MSB) to VSS (LOW); A, B, C select one of outputs 0-7 (HIGH); outputs 8-9 are always LOW. The CD4028 can also serve as a 1-of-8 demultiplexer by using the D input as a data input: when D is HIGH, the selected output follows D (HIGH); when D is LOW, all outputs are LOW. The BE suffix denotes the PDIP-16 package.","working_principle":"The CD4028BE decodes a 4-bit BCD input (DCBA) into one-of-ten active-HIGH outputs. For BCD values 0-9 (0000-1001), the corresponding output goes HIGH while all other outputs remain LOW. For invalid BCD values 10-15 (1010-1111), all outputs are LOW \u2014 no output is active. The decoding logic for each output: Output 0 = D'\u00b7C'\u00b7B'\u00b7A'; Output 1 = D'\u00b7C'\u00b7B'\u00b7A; ... Output 9 = D\u00b7C'\u00b7B'\u00b7A. For the 3-to-8 decoder mode: D tied LOW means only outputs 0-7 can be active (D=0 eliminates outputs 8 and 9). The A, B, C inputs select one of the eight outputs. For the demultiplexer mode: D is the data input; when D=1, the selected output is HIGH; when D=0, all outputs are LOW. The selected output follows D. The CD4028's active-HIGH outputs are the complement of the 7442's active-LOW outputs \u2014 if you need active-LOW, use the 7442 or add inverters to the CD4028 outputs.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>4<\/td>Output<\/td>Output 4 (active HIGH, for BCD 0100)<\/td><\/tr>\n
      2<\/td>5<\/td>Output<\/td>Output 5 (active HIGH, for BCD 0101)<\/td><\/tr>\n
      3<\/td>6<\/td>Output<\/td>Output 6 (active HIGH, for BCD 0110)<\/td><\/tr>\n
      4<\/td>7<\/td>Output<\/td>Output 7 (active HIGH, for BCD 0111)<\/td><\/tr>\n
      5<\/td>8<\/td>Output<\/td>Output 8 (active HIGH, for BCD 1000)<\/td><\/tr>\n
      6<\/td>9<\/td>Output<\/td>Output 9 (active HIGH, for BCD 1001)<\/td><\/tr>\n
      7<\/td>D<\/td>Input<\/td>BCD input MSB<\/td><\/tr>\n
      8<\/td>VSS<\/td>Power<\/td>Ground<\/td><\/tr>\n
      9<\/td>A<\/td>Input<\/td>BCD input LSB<\/td><\/tr>\n
      10<\/td>B<\/td>Input<\/td>BCD input bit 1<\/td><\/tr>\n
      11<\/td>C<\/td>Input<\/td>BCD input bit 2<\/td><\/tr>\n
      12<\/td>3<\/td>Output<\/td>Output 3 (active HIGH, for BCD 0011)<\/td><\/tr>\n
      13<\/td>2<\/td>Output<\/td>Output 2 (active HIGH, for BCD 0010)<\/td><\/tr>\n
      14<\/td>1<\/td>Output<\/td>Output 1 (active HIGH, for BCD 0001)<\/td><\/tr>\n
      15<\/td>0<\/td>Output<\/td>Output 0 (active HIGH, for BCD 0000)<\/td><\/tr>\n
      16<\/td>VDD<\/td>Power<\/td>Supply (3V to 18V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Decimal Display:<\/strong> CD4510 BCD counter \u2192 D,C,B,A; CD4028 output \u2192 transistor driver \u2192 10 individual indicator LEDs<\/li>\n
      • 3-to-8 Decoder:<\/strong> D tied to VSS; A,B,C select output 0-7 (HIGH); for 3-line address decoding in CMOS systems<\/li>\n
      • Demultiplexer:<\/strong> D = data input; A,B,C = select; selected output follows D (HIGH when D=1, LOW when D=0); 1-to-8 data routing<\/li>\n
      • Relay Driver:<\/strong> CD4028 output \u2192 transistor \u2192 relay; 10 relays controlled by 4-bit BCD code; one relay active at a time<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Supply<\/th><\/tr>\n
        CD4028BM<\/td>TI<\/td>SOIC-16 surface-mount version with identical logic function and 3-18V range<\/td>SOIC-16<\/td>3-18V<\/td><\/tr>\n
        CD4028BE<\/td>TI<\/td>Through-hole DIP version for prototyping and legacy board repair<\/td>DIP-16<\/td>3-18V<\/td><\/tr>\n
        HEF4028BT<\/td>NXP<\/td>Pin-compatible CMOS version with improved ESD protection and 3-15V supply<\/td>SOIC-16<\/td>3-15V<\/td><\/tr>\n
        MC144028BDR2G<\/td>onsemi<\/td>Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option<\/td>SOIC-16<\/td>3-18V<\/td><\/tr>\n
        74HC42D<\/td>TI\/Nexperia<\/td>HC CMOS version with higher speed and 2-6V supply for modern logic systems<\/td>SOIC-16<\/td>2-6V<\/td><\/tr>\n
        74HC42N<\/td>TI\/Nexperia<\/td>HC CMOS through-hole version for prototyping with 2-6V supply range<\/td>DIP-16<\/td>2-6V<\/td><\/tr>\n
        74HCT42D<\/td>Nexperia<\/td>HCT version with TTL-compatible inputs for mixed 5V TTL\/CMOS systems<\/td>SOIC-16<\/td>4.5-5.5V<\/td><\/tr>\n<\/table>\n

        CD4028 is the CMOS 4000-series bcd-to-decimal decoder operating over the wide 3-18V supply range. The HEF4028 (NXP) and MC144028 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC42 HC\/HCT families offer significantly faster propagation delay and lower power consumption at 2-6V. Surface-mount versions use the BM\/M suffix (SOIC); through-hole versions use the BE suffix (DIP).<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8006","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=8006"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8006\/revisions"}],"predecessor-version":[{"id":8133,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8006\/revisions\/8133"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8006"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8006"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}