Bus buffer/line driver; 3-state

The 74HC1G126 and 74HCT1G126 are high-speed, Si-gate CMOS devices. They provide one non-inverting buffer/line driver with 3-state output. The 3-state output is controlled by the output enable input pin (OE). A LOW at pin OE causes the output as assume a high-impedance OFF-state.

The HC device has CMOS input switching levels and supply voltage range 2 V to 6 V.

The HCT device has TTL input switching levels and supply voltage range 4.5 V to 5.5 V.

The bus driver output currents are equal to those of the 74HC126 and 74HCT126.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT1G126GW 74HCT1G126GW,125 935245700125 SOT353-1 Order product
74HCT1G126GW 74HCT1G126GW,165 935245700165 SOT353-1 Order product
74HCT1G126GW 74HCT1G126GW,115 935245700115 SOT353-1 Order product
74HCT1G126GW 74HCT1G126GW,118 935245700118 SOT353-1 Order product


  • Symmetrical output impedance
  • High noise immunity
  • Low power dissipation
  • Balanced propagation delays
  • SOT353-1 and SOT753 package options

Target applications


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)fmax (MHz)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HCT1G126GWProduction4.5 - 5.5TTL± 2361low-40~12525836.9136TSSOP5


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
( 9352 457 00125 )
ActiveStandard Marking
SOT353-1Reel 7" Q3/T4, Reverse

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74HC_HCT1G126Bus buffer/line driver; 3-stateData sheet2017-05-10
AN10161PicoGate Logic footprintsApplication note2002-10-29
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
SOT353-1_125TSSOP5; Reel pack; SMD, 7"; Q3 Reversed product orientation; Orderable part number ending, 125 or H; Ordering code (12NC) ending 125Packing2017-11-16
SOT353-1_165TSSOP5; Reel pack; SMD; Q3 Reverse product orientation; Orderable part number ending, 165 or Z; Ordering code (12NC) ending 165Packing2013-05-15
SOT353-1plastic, thin shrink small outline package; 5 leads; 0.65 mm pitch; 2 mm x 1.25 mm x 0.95 mm bodyOutline drawing2017-01-30


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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HCT1G126GW74HCT1G126GW,125935245700125Reel 7" Q3/T4, ReverseOrder product
74HCT1G126GW74HCT1G126GW,165935245700165Reel 11" Q3/Q4 SMDOrder product
74HCT1G126GW74HCT1G126GW,115935245700115Reel 7" Q1/T1Order product
74HCT1G126GW74HCT1G126GW,118935245700118Reel 13" Q1/T1Order product


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