{"id":3363,"date":"2026-06-03T05:54:22","date_gmt":"2026-06-03T05:54:22","guid":{"rendered":"https:\/\/materialparts.com\/uln2003adr\/"},"modified":"2026-06-03T05:54:22","modified_gmt":"2026-06-03T05:54:22","slug":"uln2003adr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/uln2003adr\/","title":{"rendered":"ULN2003ADR"},"content":{"rendered":"

Productos<\/h2>\n

The ULN2003ADR from Texas Instruments is a 7-channel Darlington transistor array in a SOIC-16 package. Each channel consists of a Darlington pair with integrated suppression diodes rated at 50V, capable of sinking 500mA per channel. It is designed for interfacing low-level logic to high-current loads such as relays, solenoids, and stepper motors.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
N\u00famero de canales<\/td>\n7<\/td>\n<\/tr>\n
Output Current per Channel<\/td>\n500 mA<\/td>\n<\/tr>\n
Collector-Emitter Voltage<\/td>\n50 V<\/td>\n<\/tr>\n
Input Voltage (Logic)<\/td>\n5V TTL\/CMOS compatible<\/td>\n<\/tr>\n
Input Resistor<\/td>\n2.7 kOhm (series base resistor)<\/td>\n<\/tr>\n
hFE (Current Gain)<\/td>\n>1000<\/td>\n<\/tr>\n
VCE(sat)<\/td>\n1.1V typical @ 350mA<\/td>\n<\/tr>\n
Clamp Diode<\/td>\nYes (common cathode, all channels)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n
Paquete<\/td>\nSOIC-16 (D)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • 7 Darlington pairs per package<\/li>\n
  • 500mA per channel output current<\/li>\n
  • 50V collector-emitter voltage<\/li>\n
  • Integrated suppression (flyback) diodes<\/li>\n
  • 2.7kOhm series input resistors for 5V logic<\/li>\n
  • Output can be paralleled for higher current<\/li>\n
  • TTL\/CMOS\/PMOS\/DTL compatible inputs<\/li>\n
  • Common emitter configuration (open-collector)<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Stepper motor driver (unipolar)<\/li>\n
    • Relay and solenoid driver<\/li>\n
    • Lamp and LED driver<\/li>\n
    • Logic buffer and level shifter<\/li>\n
    • High-voltage logic interface<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ULN2003ADR from Texas Instruments is a 7-channel Darlington transistor array in a SOIC-16 package. Each channel consists of a Darlington pair with integrated suppression diodes rated at 50V, capable of sinking 500mA per channel. It is designed for interfacing low-level logic to high-current loads such as relays, solenoids, and stepper motors. Key […]<\/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":[138],"class_list":["post-3363","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"7-ch Darlington array, 500mA\/ch, 50V, clamp diodes, SOIC-16","date_code":"","package_case":"SOIC-16 \/ D-16 (9.9 x 3.9 x 1.5 mm, 1.27mm pitch)","in_stock":12800,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/uln2003a.pdf","price":"$0.42 @ 1ku","product_introduction":"The ULN2003ADR from TI is a 7-channel Darlington transistor array in SOIC-16. Each channel sinks up to 500mA at 50V with integrated suppression diodes for inductive loads. 2.7kOhm input resistors allow direct connection to 5V TTL\/CMOS logic. Common cathode clamp diode bus enables relay and motor driving. DR suffix denotes SOIC-16 tape-and-reel packaging. Industry-standard stepper motor driver IC.","working_principle":"Each of the 7 channels consists of a Darlington pair (two cascaded NPN transistors) with a 2.7kOhm series base resistor and a 7.2kOhm base-emitter shunt resistor. The input resistor limits base current when driven from 5V logic, while the shunt resistor speeds up turn-off by providing a discharge path for stored base charge. The Darlington configuration provides current gain >1000, enabling 500mA load current from just 0.5mA input current. The integrated clamp diodes connect each collector to a common COM pin, providing a flyback current path for inductive loads (relays, motors). The COM pin should be connected to the load supply voltage.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>1B<\/td>Input<\/td>Channel 1 input (logic)<\/td><\/tr>
      2-7<\/td>2B-7B<\/td>Input<\/td>Channels 2-7 inputs (logic)<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td>Emitter common ground<\/td><\/tr>
      9<\/td>COM<\/td>Supply<\/td>Clamp diode common (connect to load supply)<\/td><\/tr>
      10-16<\/td>7C-1C<\/td>Output<\/td>Channels 7-1 collector outputs (open-collector)<\/td><\/tr><\/table>","application_scenarios":"
      • 5-wire unipolar stepper motor driver (28BYJ-48) using 4 channels<\/li>
      • Multi-relay driver board with 7 channels for automation<\/li>
      • Solenoid valve array driver for industrial control<\/li>
      • 12V LED display digit driver with multiplexing<\/li>
      • Logic-level to 24V industrial signal interface<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>ULN2003AN<\/td>PDIP-16<\/td>Through-hole version<\/td><\/tr>
        TI<\/td>ULN2803ADR<\/td>SOIC-18<\/td>8-channel version<\/td><\/tr>
        ST<\/td>ULN2003AD<\/td>SOIC-16<\/td>ST second source<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=3363"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3363\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=3363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=3363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=3363"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=3363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}