{"id":10720,"date":"2026-07-20T10:42:09","date_gmt":"2026-07-20T10:42:09","guid":{"rendered":"https:\/\/ic-vendor.com\/lmh1981mt-nopb\/"},"modified":"2026-07-20T10:42:09","modified_gmt":"2026-07-20T10:42:09","slug":"lmh1981mt-nopb","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/lmh1981mt-nopb\/","title":{"rendered":"LMH1981MT\/NOPB"},"content":{"rendered":"

Productos<\/h2>\n

The LMH1981MT\/NOPB is a multi-format video sync separator from Texas Instruments. Packaged in a 14-pin TSSOP (PW), it accepts standard analog SD\/ED\/HD video signals with bi-level or tri-level sync and outputs composite, horizontal, and vertical sync signals in CMOS logic. The device automatically detects input video format and provides precise 50% sync slicing for accurate sync extraction.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n
Funci\u00f3n<\/td>\nMulti-Format Video Sync Separator<\/td>\n<\/tr>\n
Video Standards<\/td>\nNTSC, PAL, 480I\/P, 576I\/P, 720P, 1080I\/P\/PsF<\/td>\n<\/tr>\n
Input Signal Range<\/td>\n0.5 VPP to 2 VPP<\/td>\n<\/tr>\n
Sync Types<\/td>\nBi-level and Tri-level<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n3.3 V to 5 V<\/td>\n<\/tr>\n
Number of Outputs<\/td>\n6 (CSYNC, HSYNC, VSYNC, etc.)<\/td>\n<\/tr>\n
Paquete<\/td>\n14-TSSOP (PW) \u2014 5.0 x 6.4 mm<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Automatic video format detection \u2014 no microcontroller programming needed<\/li>\n
  • Precise 50% sync slicing for accurate extraction even with irregular amplitude<\/li>\n
  • Superior HSync jitter performance on the leading edge<\/li>\n
  • 11-bit binary serial video format output (line count per field)<\/li>\n
  • Composite, horizontal, vertical sync and burst\/back porch timing outputs<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Broadcast and professional video equipment<\/li>\n
    • HDTV\/DTV systems<\/li>\n
    • Genlock circuits and frame synchronizers<\/li>\n
    • Video capture devices and DVRs<\/li>\n
    • Set-top boxes and video displays<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LMH1981MT\/NOPB is a multi-format video sync separator from Texas Instruments. Packaged in a 14-pin TSSOP (PW), it accepts standard analog SD\/ED\/HD video signals with bi-level or tri-level sync and outputs composite, horizontal, and vertical sync signals in CMOS logic. The device automatically detects input video format and provides precise 50% sync slicing […]<\/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":[19,13],"tags":[2060],"chip_brand":[138],"class_list":["post-10720","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","tag-lmh1981mt-nopb","chip_brand-ti"],"acf":{"brief_explanation":"Multi-format video sync separator, NTSC\/PAL\/HD, bi\/tri-level, 3.3\u20135 V, 14-TSSOP","date_code":"","package_case":"14-TSSOP (PW) \u2014 5.0 x 6.4 mm","in_stock":11894,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lmh1981.pdf","price":"$3.96 @ 1ku","product_introduction":"The LMH1981 is a high-performance multi-format video sync separator from Texas Instruments designed for broadcast, professional video, and HDTV\/DTV systems. It accepts composite, S-Video, or component video signals with bi-level or tri-level sync and extracts all critical timing signals including composite sync, horizontal sync, vertical sync, burst\/back porch timing, odd\/even field, and video format. The device automatically detects the input video format without requiring microcontroller programming. Precise 50% sync slicing ensures accurate extraction even with irregular input amplitude from transmission loss or improper termination.","working_principle":"The LMH1981 separates sync information from the input video signal through a precision slicing architecture. The input video is first DC-restored, then the sync tip is clamped and sliced at the 50% amplitude point. For bi-level sync (SD), the slicer extracts horizontal and vertical timing. For tri-level sync (HD), a dual-threshold approach identifies the sync edges. An internal PLL and line counter track the video format, outputting the total horizontal line count as an 11-bit binary serial data stream. The HSync output features very low jitter on its falling edge, reducing the need for external jitter cleanup circuitry in subsequent clock generation stages. All outputs swing rail-to-rail in CMOS logic levels.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>REXT<\/td>I\/O<\/td>External resistor for current reference<\/td><\/tr>
      2<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      3<\/td>VIN<\/td>Input<\/td>Video input signal<\/td><\/tr>
      4<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      5<\/td>VCC2<\/td>Power<\/td>Output stage supply (3.3\u20135 V)<\/td><\/tr>
      6<\/td>HSOUT<\/td>Output<\/td>Horizontal sync output (CMOS)<\/td><\/tr>
      7<\/td>VSOUT<\/td>Output<\/td>Vertical sync output (CMOS)<\/td><\/tr>
      8<\/td>VFOUT<\/td>Output<\/td>Video format serial data output<\/td><\/tr>
      9<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      10<\/td>BPOUT<\/td>Output<\/td>Burst\/back porch timing output<\/td><\/tr>
      11<\/td>CSOUT<\/td>Output<\/td>Composite sync output (CMOS)<\/td><\/tr>
      12<\/td>VCC<\/td>Power<\/td>Main supply (3.3\u20135 V)<\/td><\/tr>
      13<\/td>OEOUT<\/td>Output<\/td>Odd\/even field output<\/td><\/tr>
      14<\/td>VCC3<\/td>Power<\/td>Video format output supply<\/td><\/tr><\/table>","application_scenarios":"
      • Genlock and frame synchronizer circuits in broadcast studios<\/li>
      • Video capture card sync extraction for digitization<\/li>
      • HDTV set-top box sync processing<\/li>
      • DVR video input sync detection<\/li>
      • Video display and projector timing recovery<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LMH1980MT\/NOPB<\/td>14-TSSOP<\/td>Previous generation, similar function<\/td><\/tr>
        TI<\/td>LM1881MX\/NOPB<\/td>8-SOIC<\/td>SD-only sync separator, simpler<\/td><\/tr>
        Maxim<\/td>MAX9450ETJ+<\/td>32-TQFN<\/td>Multi-format sync separator<\/td><\/tr>
        Analog Devices<\/td>ADV7202KBCZ-40<\/td>80-LQFP<\/td>Video decoder with sync extraction<\/td><\/tr>
        Exar<\/td>SPB1834S1-L<\/td>24-QSOP<\/td>HD sync separator<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10720","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=10720"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10720\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=10720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=10720"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=10720"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=10720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}