{"id":5524,"date":"2026-06-10T04:22:03","date_gmt":"2026-06-10T04:22:03","guid":{"rendered":"https:\/\/materialparts.com\/uln2803adwr\/"},"modified":"2026-06-10T04:22:03","modified_gmt":"2026-06-10T04:22:03","slug":"uln2803adwr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/uln2803adwr\/","title":{"rendered":"ULN2803ADWR"},"content":{"rendered":"

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

The ULN2803ADWR from Texas Instruments is an 8-channel Darlington transistor array with 500mA per channel and built-in clamp diodes in an 18-pin SOIC package. The DW denotes SOIC-18, R denotes tape and reel. Designed for 5V TTL\/CMOS interface, it drives relays, solenoids, stepper motors, and lamps directly from logic-level inputs.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n8 Darlington pairs<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n500mA per channel<\/td>\n<\/tr>\n
VCE(sat)<\/td>\n1.1V typical @ IC=350mA<\/td>\n<\/tr>\n
hFE<\/td>\n1000 min @ IC=350mA<\/td>\n<\/tr>\n
Input Compatible<\/td>\n5V TTL\/CMOS<\/td>\n<\/tr>\n
Clamp Diodes<\/td>\nYes (all 8 channels)<\/td>\n<\/tr>\n
Input Resistor<\/td>\n2.7kOhm (series base resistor)<\/td>\n<\/tr>\n
Operating Voltage<\/td>\nUp to 50V (output)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-18 (wide, 1.27mm pitch)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 8-channel Darlington driver array<\/li>\n
  • 500mA per channel with 1A peak<\/li>\n
  • Built-in clamp diodes for inductive loads<\/li>\n
  • 2.7kOhm input resistors for 5V logic interface<\/li>\n
  • 50V output voltage capability<\/li>\n
  • 1.1V low saturation voltage at 350mA<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Relay and solenoid drivers<\/li>\n
    • Stepper motor driving<\/li>\n
    • Lamp and LED displays<\/li>\n
    • High-voltage logic interface<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ULN2803ADWR from Texas Instruments is an 8-channel Darlington transistor array with 500mA per channel and built-in clamp diodes in an 18-pin SOIC package. The DW denotes SOIC-18, R denotes tape and reel. Designed for 5V TTL\/CMOS interface, it drives relays, solenoids, stepper motors, and lamps directly from logic-level inputs. Key Specifications Channels […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,13],"tags":[],"chip_brand":[],"class_list":["post-5524","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics"],"acf":{"brief_explanation":"8-ch Darlington driver, 500mA\/ch, SOIC-18","date_code":"","package_case":"SOIC-18 (11.5 x 7.5 mm, 1.27mm pitch)","in_stock":7797,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/uln2803a.pdf","price":"$0.65 @ 1ku","product_introduction":"The ULN2803ADWR from Texas Instruments is an 8-channel Darlington transistor array with 500mA per channel and built-in clamp diodes in an 18-pin SOIC package. The DW denotes SOIC-18, R denotes tape and reel. Designed for 5V TTL\/CMOS interface, it drives relays, solenoids, stepper motors, and lamps directly from logic-level inputs.","working_principle":"The ULN2803ADWR operates as described in the product overview. Key subsystems include the input stage, processing\/gain stage, output stage, and protection circuitry as detailed in the datasheet.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1-8<\/td>IN1-IN8<\/td>Input<\/td>Logic inputs (5V TTL\/CMOS)<\/td><\/tr>
      9<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      10-17<\/td>OUT8-OUT1<\/td>Output<\/td>Darlington outputs (open-collector)<\/td><\/tr>
      18<\/td>COM<\/td>Output<\/td>Clamp diode common (connect to supply)<\/td><\/tr><\/table>","application_scenarios":"
      • Relay and solenoid drivers<\/li>
      • Stepper motor driving<\/li>
      • Lamp and LED displays<\/li>
      • High-voltage logic interface<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Package<\/th>Notes<\/th><\/tr>
        ULN2803AN<\/td>TI<\/td>DIP-18<\/td>Through-hole version<\/td><\/tr>
        TBD62083AFWG<\/td>Toshiba<\/td>SSOP-18<\/td>DMOS, lower VCEsat<\/td><\/tr>
        MC1413DG<\/td>onsemi<\/td>SOIC-16<\/td>7-channel version<\/td><\/tr>
        ULN2003ADWR<\/td>TI<\/td>SOIC-16<\/td>7-channel version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5524","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=5524"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5524\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5524"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}