{"id":7628,"date":"2026-06-26T07:00:20","date_gmt":"2026-06-26T07:00:20","guid":{"rendered":"https:\/\/materialparts.com\/sn74lvc1g123dctr-2\/"},"modified":"2026-06-26T14:12:28","modified_gmt":"2026-06-26T14:12:28","slug":"sn74lvc1g123dctr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74lvc1g123dctr-2\/","title":{"rendered":"SN74LVC1G123DCTR"},"content":{"rendered":"

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

The SN74LVC1G123DCTR from Texas Instruments is a single retriggerable monostable multivibrator with direct clear in 8-pin VSSOP package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n1.65V to 5.5V<\/td>\n<\/tr>\n
Output Pulse Width<\/td>\nSet by external Rext\/Cext<\/td>\n<\/tr>\n
Retriggerable<\/td>\nYes<\/td>\n<\/tr>\n
Direct Clear<\/td>\nYes (active low CLR)<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n6.5 ns typ @ 5V<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nVSSOP-8 (DCU)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Single retriggerable monostable multivibrator<\/li>\n
  • Wide 1.65-5.5V supply range<\/li>\n
  • Direct clear input for immediate reset<\/li>\n
  • Pulse width set by external R\/C<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Pulse generation and stretching<\/li>\n
    • Debounce circuits<\/li>\n
    • Timing and delay circuits<\/li>\n
    • One-shot trigger generation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74LVC1G123DCTR from Texas Instruments is a single retriggerable monostable multivibrator with direct clear in 8-pin VSSOP package. Key Specifications Supply Voltage 1.65V to 5.5V Output Pulse Width Set by external Rext\/Cext Retriggerable Yes Direct Clear Yes (active low CLR) Propagation Delay 6.5 ns typ @ 5V Package VSSOP-8 (DCU) Operating Temperature -40 […]<\/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],"tags":[],"chip_brand":[138],"class_list":["post-7628","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Single retriggerable monostable, 1.65-5.5V, VSSOP-8","date_code":"","package_case":"VSSOP-8 DCU (2.90 x 1.60 mm)","in_stock":6200,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74lvc1g123.pdf","price":"$0.48 @ 1ku","product_introduction":"The SN74LVC1G123DCTR from Texas Instruments is a single retriggerable monostable multivibrator in VSSOP-8 package. It generates an output pulse of precise duration determined by external timing resistor (Rext) and capacitor (Cext). The retriggerable feature allows the output pulse to be extended by applying additional trigger pulses before the current pulse terminates. The direct clear (CLR) input immediately terminates the output pulse. The wide 1.65V to 5.5V supply range supports mixed-voltage systems.","working_principle":"The SN74LVC1G123DCTR operates as a retriggerable one-shot multivibrator. (1) A rising edge on the A input (with B high) or a falling edge on the B input (with A low) triggers the monostable. The output Q goes high for a duration determined by the external Rext and Cext components: tw = 0.45 x Rext x Cext. (2) The retriggerable feature means that if a new trigger occurs before the current pulse ends, the pulse is extended by another full period from the new trigger edge. This is useful for watchdog and missing-pulse detector applications. (3) The CLR input immediately resets the output regardless of the current timing state. The device uses LVC technology for high-speed operation with 6.5ns propagation delay at 5V and low power consumption.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>A<\/td>Trigger input A (active low edge)<\/td><\/tr>
      2<\/td>B<\/td>Trigger input B (active high edge)<\/td><\/tr>
      3<\/td>CLR<\/td>Direct clear (active low)<\/td><\/tr>
      4<\/td>Cext<\/td>External capacitor connection<\/td><\/tr>
      5<\/td>Rext\/Cext<\/td>External R\/C connection<\/td><\/tr>
      6<\/td>Rext<\/td>External resistor connection<\/td><\/tr>
      7<\/td>Q<\/td>Positive output pulse<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td><\/tr><\/table>","application_scenarios":"
      • Pulse generation and stretching with external R\/C timing<\/li>
      • Switch debounce with retriggerable operation<\/li>
      • Watchdog and missing-pulse detection circuits<\/li>
      • One-shot trigger generation in mixed-voltage systems<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        SN74LVC2G123DCTR<\/td>TI<\/td>Dual channel version<\/td><\/tr>
        74VHC123AFT<\/td>Renesas<\/td>Dual, VHC technology<\/td><\/tr>
        CD74HC123EE4<\/td>TI<\/td>Dual, HC, DIP-16<\/td><\/tr>
        NC7SZ123K8X<\/td>onsemi<\/td>Single, MicroPak<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7628","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=7628"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7628\/revisions"}],"predecessor-version":[{"id":7698,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7628\/revisions\/7698"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7628"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}