{"id":6470,"date":"2026-06-16T04:10:17","date_gmt":"2026-06-16T04:10:17","guid":{"rendered":"https:\/\/materialparts.com\/mc74vhc1gt125df2g\/"},"modified":"2026-06-16T04:10:17","modified_gmt":"2026-06-16T04:10:17","slug":"mc74vhc1gt125df2g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mc74vhc1gt125df2g\/","title":{"rendered":"MC74VHC1GT125DF2G"},"content":{"rendered":"

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

The MC74VHC1GT125DF2G is a single non-inverting 3-state buffer from onsemi with TTL-compatible input thresholds (T suffix). The 3-state output enables bus sharing and signal isolation, while the 7V-tolerant inputs and Ioff circuitry support level translation and hot insertion. With 3.5ns propagation delay, \u00b18mA output drive, and SC-88A (SC-70-5) packaging, it is ideal for bus buffering and voltage translation in space-constrained designs.<\/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\n
Logic Function<\/td>\nSingle Non-Inverting 3-State Buffer<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2.0V to 5.5V<\/td>\n<\/tr>\n
Input Threshold<\/td>\nTTL-compatible (T suffix)<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n3.5ns typ @ 5V<\/td>\n<\/tr>\n
Output Drive<\/td>\n\u00b18mA @ 3V; \u00b18mA @ 4.5V<\/td>\n<\/tr>\n
\u0646\u0648\u0639 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n3-State (OE active-low enables output)<\/td>\n<\/tr>\n
Input Voltage Tolerance<\/td>\nUp to 5.5V (overvoltage tolerant)<\/td>\n<\/tr>\n
\u062f\u0639\u0645 Ioff<\/td>\nYes (partial power-down protection)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n1\u00b5A max @ 25\u00b0C<\/td>\n<\/tr>\n
3-State Leakage<\/td>\n\u00b10.25\u00b5A max @ 25\u00b0C<\/td>\n<\/tr>\n
ESD Protection<\/td>\n2000V HBM, 1000V CDM<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSC-88A \/ SC-70-5 \/ SOT-353 (2.0 x 1.25mm)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Single non-inverting 3-state buffer with active-low OE<\/li>\n
  • TTL-compatible input thresholds (T suffix)<\/li>\n
  • 3.5ns propagation delay at 5V<\/li>\n
  • 5.5V-tolerant inputs for level translation<\/li>\n
  • Ioff supports partial power-down and hot insertion<\/li>\n
  • \u00b18mA output drive at 3V<\/li>\n
  • 3-state output for bus sharing<\/li>\n
  • 1\u00b5A max quiescent current<\/li>\n
  • Available in SC-88A, SC-74A, TSOP-5, SOT-953, UDFN6<\/li>\n
  • Pb-free, halogen-free, RoHS compliant<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Bus buffer with enable control<\/li>\n
    • 3-state bus sharing and multiplexing<\/li>\n
    • Level translation with output isolation<\/li>\n
    • Hot insertion signal buffering<\/li>\n
    • GPIO expansion with tri-state control<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MC74VHC1GT125DF2G is a single non-inverting 3-state buffer from onsemi with TTL-compatible input thresholds (T suffix). The 3-state output enables bus sharing and signal isolation, while the 7V-tolerant inputs and Ioff circuitry support level translation and hot insertion. With 3.5ns propagation delay, \u00b18mA output drive, and SC-88A (SC-70-5) packaging, it is ideal for […]<\/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":[182],"class_list":["post-6470","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-onsemi"],"acf":{"brief_explanation":"Single 3-state buffer, VHC, 2-5.5V, TTL inputs, active-low OE, 3.5ns@5V, OVT, Ioff, SC-88A","date_code":"","package_case":"SC-88A \/ SC-70-5 \/ SOT-353 (2.0 x 1.25 x 0.9mm)","in_stock":5000,"datasheet":"https:\/\/www.onsemi.com\/pdf\/datasheet\/mc74vhc1g125-d.pdf","price":"$0.03 @ 1ku","product_introduction":"The MC74VHC1GT125DF2G from onsemi is a single non-inverting 3-state buffer with TTL-compatible input thresholds. The device passes the input signal to the output (Y = A) when the output enable (OE) pin is low, and enters a high-impedance state when OE is high. The T suffix provides TTL-compatible input thresholds (VIH \u2248 1.4V at 3V VCC), enabling interface with bipolar TTL devices. The VHC technology delivers 3.5ns propagation delay at 5V \u2014 matching Schottky TTL speed \u2014 while consuming only 1\u00b5A quiescent current. The 5.5V-tolerant inputs accept signals from higher-voltage domains, and the Ioff circuitry ensures the output goes high-impedance when VCC is removed, supporting hot insertion and partial power-down scenarios. The DF2 suffix indicates SC-88A (SC-70-5) tape-and-reel packaging in a tiny 2.0 x 1.25mm footprint.","working_principle":"The MC74VHC1GT125DF2G combines a non-inverting buffer with a 3-state output stage controlled by the active-low OE pin. When OE is low, the buffer is active and Y = A \u2014 the input signal passes through to the output. When OE is high, both the PMOS pull-up and NMOS pull-down transistors in the output stage are turned off, placing the output in a high-impedance (Hi-Z) state. This allows multiple devices to share a common bus without contention. The T suffix input stage has TTL-compatible switching thresholds, accepting TTL logic levels (VIH \u2265 2.0V, VIL \u2264 0.8V at 4.5V VCC) while producing full CMOS output swings. The input protection circuitry tolerates voltages up to 5.5V regardless of VCC, enabling down-translation from 5V to 3.3V domains. The Ioff circuit extends the high-impedance behavior to the VCC=0V condition, preventing current from flowing from the input or bus back through the device during power-off.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>OE<\/td>Output enable (active low; high = Hi-Z)<\/td><\/tr>
      2<\/td>A<\/td>Data input (TTL thresholds)<\/td><\/tr>
      3<\/td>GND<\/td>Ground<\/td><\/tr>
      4<\/td>Y<\/td>Data output (3-state; Y = A when OE low)<\/td><\/tr>
      5<\/td>VCC<\/td>Supply voltage (2.0V to 5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Shared Bus Isolation:<\/b> Connect multiple peripherals to a shared data bus through MC74VHC1GT125DF2G buffers. Only one peripheral's OE is asserted low at a time; all others are high-impedance. The MCU controls which peripheral drives the bus by managing the OE pins. The TTL-compatible inputs accept signals from legacy 5V TTL peripherals while the output swings 0 to 3.3V for the modern CMOS bus.<\/li>
      • Level Translation with Bus Isolation:<\/b> Translate a 5V bus signal to a 3.3V domain while adding a 3-state enable. The 5.5V-tolerant input safely accepts the 5V signal; the output swings 0 to 3.3V. The OE pin allows the MCU to disconnect the translator from the 3.3V bus when not needed, reducing power consumption and bus loading.<\/li>
      • Hot-Swap Signal Protection:<\/b> Use on a plug-in card where the signal must be isolated from the backplane during insertion and removal. When the card is not powered, Ioff ensures the output is Hi-Z regardless of OE state. Once VCC ramps up, the system controller asserts OE low to connect the signal. This prevents bus contention and current backflow during hot-swap events.<\/li><\/ul>","alternative_models":"
        Model<\/th>VCC<\/th>Input<\/th>Key Difference<\/th><\/tr>
        MC74VHC1G125DF2G<\/td>2-5.5V<\/td>CMOS<\/td>CMOS thresholds (no T)<\/td><\/tr>
        SN74LVC1G125DCKR<\/td>1.65-5.5V<\/td>CMOS<\/td>TI LVC, similar 3-state buffer<\/td><\/tr>
        NC7NZ125P5X<\/td>1.65-5.5V<\/td>CMOS<\/td>Renesas, similar 3-state<\/td><\/tr>
        74AUP1G125GF<\/td>0.8-3.6V<\/td>CMOS<\/td>Nexperia, ultra-low power<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6470","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=6470"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6470\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6470"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6470"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}