{"id":6567,"date":"2026-06-18T14:52:50","date_gmt":"2026-06-18T14:52:50","guid":{"rendered":"https:\/\/materialparts.com\/icm7555ipa\/"},"modified":"2026-06-18T14:52:50","modified_gmt":"2026-06-18T14:52:50","slug":"icm7555ipa","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/icm7555ipa\/","title":{"rendered":"ICM7555IPA"},"content":{"rendered":"

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

The ICM7555IPA from NXP Semiconductors is a CMOS general-purpose timer that directly replaces the bipolar NE555 while offering significantly improved performance: 80uA supply current, 20pA input currents, 500kHz maximum frequency, and rail-to-rail output. Packaged in 8-pin PDIP.<\/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
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3V to 16V<\/td>\n<\/tr>\n
Supply Current<\/td>\n80uA (typ)<\/td>\n<\/tr>\n
Trigger\/Threshold Current<\/td>\n20pA (typ)<\/td>\n<\/tr>\n
Maximum Frequency<\/td>\n500kHz (guaranteed)<\/td>\n<\/tr>\n
Timing Stability<\/td>\n0.005%\/C (typ)<\/td>\n<\/tr>\n
Output Swing<\/td>\nRail-to-rail<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n8-PDIP<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Direct replacement for NE\/SE555 in most applications<\/li>\n
  • Ultra-low supply current: 80uA typical<\/li>\n
  • Extremely low input currents: 20pA typical<\/li>\n
  • Rail-to-rail output swing<\/li>\n
  • No supply crowbarring during output transitions<\/li>\n
  • No CONTROL VOLTAGE bypass capacitor required<\/li>\n
  • 500kHz guaranteed maximum frequency<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Precision timing and pulse generation<\/li>\n
    • Low-power oscillator circuits<\/li>\n
    • Battery-powered timing applications<\/li>\n
    • PWM and PPM modulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ICM7555IPA from NXP Semiconductors is a CMOS general-purpose timer that directly replaces the bipolar NE555 while offering significantly improved performance: 80uA supply current, 20pA input currents, 500kHz maximum frequency, and rail-to-rail output. Packaged in 8-pin PDIP. Key Specifications Supply Voltage 3V to 16V Supply Current 80uA (typ) Trigger\/Threshold Current 20pA (typ) Maximum […]<\/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":[13,55],"tags":[],"chip_brand":[168],"class_list":["post-6567","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-transistors","chip_brand-nxp"],"acf":{"brief_explanation":"CMOS 555 timer, 3-16V, 80uA Iq, 500kHz, rail-to-rail output, 8-PDIP","date_code":"","package_case":"8-PDIP","in_stock":14684,"datasheet":"https:\/\/www.nxp.com\/docs\/en\/data-sheet\/ICM7555.pdf","price":"$0.55 @ 1ku","product_introduction":"The ICM7555IPA from NXP Semiconductors is a CMOS version of the classic 555 timer that provides significantly improved performance over the bipolar NE555. Key improvements include 80uA supply current (vs 3mA for NE555), 20pA trigger and threshold input currents (vs 100nA), 500kHz maximum oscillation frequency (vs 100kHz), and rail-to-rail output swing. The CMOS design eliminates the supply current crowbarring that occurs during NE555 output transitions, and the CONTROL VOLTAGE pin does not require a bypass capacitor. These features make the ICM7555 ideal for battery-powered and precision timing applications.","working_principle":"The ICM7555 uses CMOS comparators and a CMOS flip-flop instead of bipolar equivalents. Two comparators monitor the THRESHOLD and TRIGGER pins against internal voltage dividers at 2\/3 VDD and 1\/3 VDD respectively. In monostable mode, a trigger pulse below 1\/3 VDD sets the flip-flop, driving the output high and releasing the discharge transistor. The timing capacitor charges through the external resistor until it reaches 2\/3 VDD, which resets the flip-flop. In astable mode, the capacitor charges and discharges between 1\/3 and 2\/3 VDD through external resistors. The CMOS output stage swings rail-to-rail, unlike the NE555 which drops 1.5-2.5V from the rails.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td><\/tr>
      2<\/td>TRIGGER<\/td>Trigger input (active low, <1\/3 VDD)<\/td><\/tr>
      3<\/td>OUTPUT<\/td>Output (rail-to-rail swing)<\/td><\/tr>
      4<\/td>RESET<\/td>Reset input (active low)<\/td><\/tr>
      5<\/td>CONTROL VOLTAGE<\/td>Modulation\/adjustment input (no bypass cap needed)<\/td><\/tr>
      6<\/td>THRESHOLD<\/td>Threshold input (compares to 2\/3 VDD)<\/td><\/tr>
      7<\/td>DISCHARGE<\/td>Open-drain discharge output<\/td><\/tr>
      8<\/td>VDD<\/td>Positive supply (3-16V)<\/td><\/tr><\/table>","application_scenarios":"
      • Battery-powered timer circuits with 80uA supply current for long battery life<\/li>
      • High-frequency oscillators up to 500kHz using high-impedance timing components<\/li>
      • Precision timing with 0.005%\/C stability without external bypass capacitor<\/li>
      • PWM motor speed control with rail-to-rail output for maximum drive voltage<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        NE555P<\/td>TI<\/td>Bipolar, higher current drive, higher Iq<\/td><\/tr>
        TLC555CP<\/td>TI<\/td>CMOS 555, 2MHz max, similar to ICM7555<\/td><\/tr>
        LMC555CN<\/td>TI<\/td>CMOS 555, 1.5V min supply<\/td><\/tr>
        ICM7556<\/td>NXP<\/td>Dual CMOS 555 timer<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6567","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=6567"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6567\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6567"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6567"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}