{"id":2809,"date":"2026-05-26T01:33:33","date_gmt":"2026-05-26T01:33:33","guid":{"rendered":"https:\/\/materialparts.com\/ne555dr\/"},"modified":"2026-05-26T01:33:33","modified_gmt":"2026-05-26T01:33:33","slug":"ne555dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ne555dr\/","title":{"rendered":"NE555DR"},"content":{"rendered":"

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

The NE555DR from Texas Instruments is a precision single timer IC in an SOIC-8 package capable of producing accurate time delays or oscillation. In monostable mode, the timed interval is controlled by a single external resistor and capacitor network. In astable mode, the frequency and duty cycle are independently controlled with two external resistors and a single capacitor.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n4.5V to 16V (operating), up to 18V absolute max<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n\u00b1200mA (sink or source)<\/td>\n<\/tr>\n
Timing Range<\/td>\nMicroseconds to Hours<\/td>\n<\/tr>\n
Trigger Threshold<\/td>\n1\/3 VCC<\/td>\n<\/tr>\n
Threshold Level<\/td>\n2\/3 VCC<\/td>\n<\/tr>\n
Supply Current (VCC=5V)<\/td>\n3mA typ.<\/td>\n<\/tr>\n
Supply Current (VCC=15V)<\/td>\n10mA typ.<\/td>\n<\/tr>\n
Initial Timing Error<\/td>\n1% typ. (monostable)<\/td>\n<\/tr>\n
Temperature Coefficient<\/td>\n50 ppm\/\u00b0C typ.<\/td>\n<\/tr>\n
Output Rise Time<\/td>\n100ns typ.<\/td>\n<\/tr>\n
Output Fall Time<\/td>\n100ns typ.<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (3.9 x 4.9mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Timing from microseconds to hours<\/li>\n
  • Astable or monostable operation<\/li>\n
  • Adjustable duty cycle<\/li>\n
  • TTL-compatible output, can sink or source up to 200mA<\/li>\n
  • Adjustable threshold and trigger levels via CONT pin<\/li>\n
  • Active-low reset overrides all other inputs<\/li>\n
  • Open-drain discharge transistor for timing capacitor<\/li>\n
  • Wide supply voltage range: 4.5V to 16V<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Precision timing and pulse generation<\/li>\n
    • LED flashers and PWM controllers<\/li>\n
    • Tone and frequency generation<\/li>\n
    • Time delay circuits<\/li>\n
    • RFID reader and biometric systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The NE555DR from Texas Instruments is a precision single timer IC in an SOIC-8 package capable of producing accurate time delays or oscillation. In monostable mode, the timed interval is controlled by a single external resistor and capacitor network. In astable mode, the frequency and duty cycle are independently controlled with two external […]<\/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":[13,55],"tags":[],"chip_brand":[138],"class_list":["post-2809","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-transistors","chip_brand-ti"],"acf":{"brief_explanation":"Precision timer IC, 4.5-16V, \u00b1200mA output, mono\/astable, SOIC-8","date_code":"","package_case":"SOIC-8 (3.9 x 4.9 x 1.25mm)","in_stock":5215,"datasheet":"https:\/\/www.ti.com\/product\/NE555","price":"$0.12 @ 1ku","product_introduction":"The NE555DR from Texas Instruments is the industry-standard precision single timer in an SOIC-8 package. It can be configured for monostable (one-shot) or astable (free-running) operation, producing timing intervals from microseconds to hours. The output can sink or source up to 200mA and is TTL-compatible when operating from a 5V supply. The threshold and trigger levels are internally set at 2\/3 and 1\/3 of VCC respectively, but can be adjusted via the control voltage pin.","working_principle":"The NE555 contains two comparators, a set-reset flip-flop, a discharge transistor, and a resistive voltage divider network (three 5k\u03a9 resistors creating 1\/3 and 2\/3 VCC references). In monostable mode, a falling edge on the TRIG pin (below 1\/3 VCC) sets the flip-flop, driving the output high and turning off the discharge transistor, allowing the external timing capacitor to charge through the external resistor. When the capacitor voltage reaches 2\/3 VCC (THRES pin), the flip-flop resets, the output goes low, and the discharge transistor turns on to rapidly discharge the capacitor. In astable mode, the capacitor charges and discharges between 1\/3 and 2\/3 VCC through two external resistors.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Power<\/td>Ground reference<\/td><\/tr>
      2<\/td>TRIG<\/td>Input<\/td>Trigger input (active below 1\/3 VCC)<\/td><\/tr>
      3<\/td>OUT<\/td>Output<\/td>Output (sink or source up to 200mA)<\/td><\/tr>
      4<\/td>RESET<\/td>Input<\/td>Active-low reset (overrides all inputs)<\/td><\/tr>
      5<\/td>CONT<\/td>I\/O<\/td>Control voltage (adjusts threshold\/trigger)<\/td><\/tr>
      6<\/td>THRES<\/td>Input<\/td>Threshold input (active above 2\/3 VCC)<\/td><\/tr>
      7<\/td>DISCH<\/td>Output<\/td>Open-collector discharge transistor<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>Supply voltage (4.5V to 16V)<\/td><\/tr><\/table>","application_scenarios":"
      • Precision time-delay generation for industrial sequencing<\/li>
      • LED flasher and strobe light circuits<\/li>
      • PWM motor speed control with adjustable duty cycle<\/li>
      • Tone and frequency generation for alarms and sirens<\/li>
      • RFID and biometric system timing<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>NE555P<\/td>PDIP-8<\/td>Through-hole version<\/td><\/tr>
        TI<\/td>SA555DR<\/td>SOIC-8<\/td>Industrial temp (-40\u00b0C to +85\u00b0C)<\/td><\/tr>
        TI<\/td>LMC555CM<\/td>SOIC-8<\/td>CMOS version, low power (100\u03bcA)<\/td><\/tr>
        onsemi<\/td>MC1455DR2G<\/td>SOIC-8<\/td>Pin-compatible 555 timer<\/td><\/tr>
        ST<\/td>NE555D<\/td>SOIC-8<\/td>Pin-compatible equivalent<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2809","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=2809"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2809\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2809"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}