{"id":9616,"date":"2026-07-04T10:33:40","date_gmt":"2026-07-04T10:33:40","guid":{"rendered":"https:\/\/materialparts.com\/ds9503ptr\/"},"modified":"2026-07-04T10:33:40","modified_gmt":"2026-07-04T10:33:40","slug":"ds9503ptr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ds9503ptr\/","title":{"rendered":"DS9503P+T&R"},"content":{"rendered":"

Productos<\/h2>\n

The DS9503P+T&R from Analog Devices (formerly Maxim Integrated) is an ESD protection diode with integrated 5 \u03a9 isolation resistors designed specifically for 1-Wire interface protection. Featuring a snapback (fast-recovery) Zener characteristic that clamps ESD events to safe voltage levels, it raises ESD protection to over 27 kV (IEC 801-2) when used with circuits that already have basic ESD protection. The device is housed in a TSOC-6 surface-mount package and is tape-and-reel packaged for automated assembly.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Protection Target<\/td>\n1-Wire interface<\/td>\n<\/tr>\n
ESD Protection Level<\/td>\n>27 kV (IEC 801-2, with existing protection)<\/td>\n<\/tr>\n
Isolation Resistors<\/td>\n2 x 5 \u03a9 (integrated)<\/td>\n<\/tr>\n
Trigger Voltage<\/td>\n~9 V (snapback Zener)<\/td>\n<\/tr>\n
Holding Voltage<\/td>\n~6 V (fast-recovery mode)<\/td>\n<\/tr>\n
Leakage Current<\/td>\nLow (normal operation)<\/td>\n<\/tr>\n
Capacitance<\/td>\nLow (minimizes signal degradation)<\/td>\n<\/tr>\n
Failure Mode<\/td>\nShort circuit (fail-safe)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\nIndustrial range<\/td>\n<\/tr>\n
Paquete<\/td>\nTSOC-6 (Tape & Reel)<\/td>\n<\/tr>\n
Compatible Logic<\/td>\nAll 5 V logic families<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Snapback (fast-recovery) Zener characteristic for effective ESD clamping<\/li>\n
  • Two integrated 5 \u03a9 isolation resistors for additional circuit protection<\/li>\n
  • Compatible with all 5 V logic families<\/li>\n
  • Fail-safe short-circuit failure mode protects downstream circuitry<\/li>\n
  • Low capacitance avoids 1-Wire signal degradation<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • 1-Wire iButton reader ESD protection<\/li>\n
    • iButton smart key and access control systems<\/li>\n
    • Temperature sensor (DS18B20) 1-Wire bus protection<\/li>\n
    • Industrial 1-Wire network surge protection<\/li>\n
    • Medical device 1-Wire interface ESD protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The DS9503P+T&R from Analog Devices (formerly Maxim Integrated) is an ESD protection diode with integrated 5 \u03a9 isolation resistors designed specifically for 1-Wire interface protection. Featuring a snapback (fast-recovery) Zener characteristic that clamps ESD events to safe voltage levels, it raises ESD protection to over 27 kV (IEC 801-2) when used with circuits […]<\/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":[13,44],"tags":[867],"chip_brand":[165],"class_list":["post-9616","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-pressure-sensors","tag-ds9503ptr","chip_brand-adi"],"acf":{"brief_explanation":"1-Wire ESD protection diode with 2x5\u03a9 isolation resistors, snapback Zener, >27kV, TSOC-6 T&R","date_code":"","package_case":"TSOC-6 (Surface Mount)","in_stock":14269,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/DS9503.pdf","price":"$1.20 @ 1+","product_introduction":"The DS9503P+T&R from Analog Devices is an ESD protection diode designed specifically for 1-Wire interface applications. Compared to the DS9502, the DS9503 integrates two 5 \u03a9 isolation resistors that provide additional circuit protection during ESD events. During normal operation, the 5 \u03a9 resistors are negligible for 1-Wire communication. However, during an ESD strike, the resistors present a relatively high impedance compared to the conducting snapback diode, forcing the ESD energy through the diode and isolating the protected circuit on the other side. The snapback (fast-recovery) Zener characteristic means that once the trigger voltage is exceeded, the device enters a low-voltage holding state, effectively clamping the transient. If an extreme ESD event exceeds the device's maximum rating, the DS9503 fails short, providing fail-safe protection.","working_principle":"The DS9503P+T&R operates through a snapback Zener mechanism: (1) Normal Operation \u2014 the device presents a high impedance with low leakage current and low capacitance, not affecting 1-Wire communication through the 5 \u03a9 series resistors; (2) ESD Trigger \u2014 when a voltage transient exceeds the trigger voltage (~9 V), the internal Zener junction avalanches and the device enters snapback mode, where the voltage drops to the holding voltage (~6 V) while conducting high current; (3) Energy Absorption \u2014 the ESD energy is dissipated in the Zener junction while the 5 \u03a9 resistors isolate the protected circuit side from the ESD event on the 1-Wire line side; (4) Recovery \u2014 when the transient current drops below the holding current, the device exits snapback and returns to high-impedance state; (5) Fail-Safe \u2014 if the ESD energy exceeds the device's absorption capability, the junction fuses into a permanent short circuit, ensuring the protected circuit is not exposed to dangerous voltages.","pin_description":"
      Pin<\/th>Function<\/th><\/tr>
      1 (1-Wire side)<\/td>1-Wire data line connection with 5 \u03a9 series resistor<\/td><\/tr>
      2 (GND)<\/td>Ground connection<\/td><\/tr>
      3 (1-Wire side)<\/td>1-Wire data line return with 5 \u03a9 series resistor<\/td><\/tr>
      4 (Protected side)<\/td>Protected circuit connection (downstream of 5 \u03a9 resistor)<\/td><\/tr>
      5 (GND)<\/td>Ground connection<\/td><\/tr>
      6 (Protected side)<\/td>Protected circuit return (downstream of 5 \u03a9 resistor)<\/td><\/tr><\/table>","application_scenarios":"
      • iButton access control reader protecting the 1-Wire probe from >27 kV ESD discharge events<\/li>
      • DS18B20 temperature sensor network with DS9503 at each node protecting against cable discharge<\/li>
      • Industrial 1-Wire bus protecting the master transceiver from ESD on long cable runs<\/li>
      • Electronic lock system with iButton key reader ESD protection for reliable operation<\/li>
      • Medical patient monitoring device 1-Wire sensor interface with fail-safe ESD protection<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        DS9502P+T&R<\/td>Analog Devices<\/td>ESD protection without isolation resistors<\/td><\/tr>
        DS9503P+<\/td>Analog Devices<\/td>Same device, cut-tape packaging<\/td><\/tr>
        TVS0500DMVR<\/td>TI<\/td>General-purpose ESD protection, 5 V working voltage<\/td><\/tr>
        PESD5V0S1BA<\/td>Nexperia<\/td>Generic 5 V ESD protection diode<\/td><\/tr>
        TPD4E05U06<\/td>TI<\/td>Quad-channel ESD protection for multi-line interfaces<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9616","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=9616"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9616\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=9616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=9616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=9616"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=9616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}