{"id":7851,"date":"2026-06-28T02:53:04","date_gmt":"2026-06-28T02:53:04","guid":{"rendered":"https:\/\/materialparts.com\/ne555p-3\/"},"modified":"2026-06-28T10:20:14","modified_gmt":"2026-06-28T10:20:14","slug":"ne555p-3","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ne555p-3\/","title":{"rendered":"NE555P"},"content":{"rendered":"

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

The NE555P is a precision timer from Texas Instruments capable of producing accurate time delays or oscillation from microseconds to hours in a 8-pin PDIP through-hole 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\n\n\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n4.5V to 16V<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n200mA max (sink or source)<\/td>\n<\/tr>\n
Timing Range<\/td>\nMicroseconds to hours<\/td>\n<\/tr>\n
Frequency (astable)<\/td>\nUp to 500kHz typical<\/td>\n<\/tr>\n
Initial Timing Accuracy<\/td>\n1% typical<\/td>\n<\/tr>\n
Temperature Drift<\/td>\n50ppm\/\u00b0C typical<\/td>\n<\/tr>\n
Supply Current<\/td>\n6mA typical at 15V<\/td>\n<\/tr>\n
Trigger Voltage<\/td>\n1\/3 VCC<\/td>\n<\/tr>\n
Threshold Voltage<\/td>\n2\/3 VCC<\/td>\n<\/tr>\n
Reset Voltage<\/td>\n0.7V typical (active low)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nPDIP-8 (9.81 x 6.35mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Operates in both astable and monostable modes<\/li>\n
  • Adjustable duty cycle in astable mode<\/li>\n
  • Output can source or sink up to 200mA<\/li>\n
  • Timing from microseconds to hours<\/li>\n
  • 1% initial timing accuracy<\/li>\n
  • Temperature-stable: 50ppm\/\u00b0C<\/li>\n
  • Reset pin overrides all other inputs<\/li>\n
  • Compatible with CMOS logic at 5V supply<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Precision timing and time delay generation<\/li>\n
    • Pulse generation and waveform shaping<\/li>\n
    • LED flashers and tone generators<\/li>\n
    • PWM motor speed control<\/li>\n
    • Power-up delay and watchdog timers<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The NE555P is a precision timer from Texas Instruments capable of producing accurate time delays or oscillation from microseconds to hours in a 8-pin PDIP through-hole package. Key Specifications Supply Voltage 4.5V to 16V Output Current 200mA max (sink or source) Timing Range Microseconds to hours Frequency (astable) Up to 500kHz typical Initial […]<\/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-7851","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"Precision timer IC, astable\/monostable, 4.5-16V, 200mA output, PDIP-8","date_code":"","package_case":"PDIP-8 (9.81 x 6.35 x 4.57mm, 2.54mm pitch)","in_stock":21000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ne555.pdf","price":"$0.42 @ 1ku","product_introduction":"The NE555P is the industry-standard precision timer from Texas Instruments that has been in production for over 50 years. It can be configured as either a monostable (one-shot) multivibrator producing time delays, or as an astable (free-running) multivibrator generating square wave oscillation. The timing is controlled by external resistors and capacitors, providing flexibility from microseconds to hours. The output can source or sink up to 200mA, directly driving relays, LEDs, and small speakers. The 1% initial timing accuracy and 50ppm\/\u00b0C temperature drift ensure reliable operation across varying conditions. The 8-pin PDIP package is universally recognized and ideal for prototyping.","working_principle":"The NE555P contains two comparators, a flip-flop, a discharge transistor, and a resistive voltage divider consisting of three 5k\u03a9 resistors (giving the device its name). The voltage divider sets the upper comparator threshold at 2\/3 VCC and the lower comparator threshold at 1\/3 VCC. In monostable mode, a negative-going trigger pulse on pin 2 (below 1\/3 VCC) sets the flip-flop, driving the output high and turning off the discharge transistor. The external timing capacitor charges through the timing resistor toward VCC. When the capacitor voltage reaches 2\/3 VCC, the upper comparator resets the flip-flop, driving the output low and turning on the discharge transistor to rapidly discharge the capacitor. The output pulse width is T = 1.1 \u00d7 R \u00d7 C. In astable mode, the capacitor charges through R1+R2 and discharges through R2 only. The charge time (output high) is 0.693 \u00d7 (R1+R2) \u00d7 C, and the discharge time (output low) is 0.693 \u00d7 R2 \u00d7 C, giving a free-running oscillation frequency of 1.44 \/ ((R1+2\u00d7R2) \u00d7 C). The duty cycle is always greater than 50% in the basic configuration because R1+R2 > R2. The reset pin (pin 4) overrides all other inputs, forcing the output low and discharging the timing capacitor.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      2<\/td>TRIG<\/td>Input<\/td>Trigger (active below 1\/3 VCC, starts timing)<\/td><\/tr>\n
      3<\/td>OUT<\/td>Output<\/td>Output (source\/sink up to 200mA)<\/td><\/tr>\n
      4<\/td>RESET<\/td>Input<\/td>Reset (active low, overrides all inputs)<\/td><\/tr>\n
      5<\/td>CTRL<\/td>Analog<\/td>Control voltage (2\/3 VCC, bypass with 0.01\u00b5F)<\/td><\/tr>\n
      6<\/td>THRESH<\/td>Input<\/td>Threshold (ends timing at 2\/3 VCC)<\/td><\/tr>\n
      7<\/td>DISCH<\/td>Output<\/td>Discharge (open collector, discharges timing capacitor)<\/td><\/tr>\n
      8<\/td>VCC<\/td>Power<\/td>Supply voltage (4.5V-16V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Time Delays:<\/strong> Monostable mode produces precise delays from 10\u00b5s to hours for power-up sequencing and debounce<\/li>\n
      • LED Flashers:<\/strong> Astable mode with R and C values sets flash rate; 200mA output directly drives multiple LEDs<\/li>\n
      • PWM Motor Control:<\/strong> Astable oscillator with control voltage modulation on pin 5 varies duty cycle for motor speed control<\/li>\n
      • Tone Generation:<\/strong> Audio-frequency oscillation with speaker coupling produces alarm tones and beeps<\/li>\n
      • Watchdog Timers:<\/strong> Monostable retriggered by MCU; timeout triggers system reset for safety-critical applications<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Specs<\/th><\/tr>\n
        LM555CN<\/td>TI<\/td>Direct equivalent with identical timing characteristics and wider -40 to +85C temperature range<\/td>DIP-8<\/td>4.5-16V\/200mA<\/td><\/tr>\n
        TLC555CP<\/td>TI<\/td>CMOS version with 2-15V supply, 1\u00b5A typical supply current for battery-powered timers<\/td>DIP-8<\/td>2-15V\/100mA CMOS<\/td><\/tr>\n
        SA555P<\/td>TI<\/td>Automotive-grade -40 to +125C version for under-hood timer and control applications<\/td>DIP-8<\/td>4.5-16V\/-40-125C<\/td><\/tr>\n
        NA555P<\/td>TI<\/td>Wide-temperature -40 to +125C version with military-grade screening for reliability<\/td>DIP-8<\/td>4.5-16V\/-40-125C<\/td><\/tr>\n
        NE556N<\/td>TI<\/td>Dual timer version with two independent 555 timers in a single DIP-14 package<\/td>DIP-14<\/td>4.5-16V\/dual<\/td><\/tr>\n
        LMC555CN<\/td>TI<\/td>CMOS low-power version with 1.5V minimum supply and 2MHz astable frequency capability<\/td>DIP-8<\/td>1.5-15V\/100mA<\/td><\/tr>\n<\/table>\n

        NE555 is the industry-standard precision timer generating accurate time delays from microseconds to hours. It operates in both astable (oscillator) and monostable (one-shot) modes. CMOS versions (TLC555, LMC555) offer 2-15V supply and 1\u00b5A standby for battery applications. The NE556 provides dual timers in DIP-14. SA555 extends temperature range to 125C for automotive use.<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7851","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=7851"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7851\/revisions"}],"predecessor-version":[{"id":8287,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7851\/revisions\/8287"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7851"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7851"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}