Hex inverting buffer; 3-state

The HEF40098B is a hex inverting buffer with 3-state outputs. The 3-state outputs are controlled by two active LOW enable inputs (1OE and 2OE). A HIGH on 1OE causes four of the six active LOW buffer elements (1Y0 to 1Y3) to assume a high-impedance or OFF-state regardless of the other input conditions and a HIGH on 2OE causes the outputs of the remaining two buffer elements (2Y0 and 2Y1) to assume a high-impedance or OFF-state regardless of the other input conditions.

It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
HEF40098BT HEF40098BT,653 933373410653 SOT109-1 Order product
HEF40098BT HEF40098BT,652 933373410652 SOT109-1 Order product


  • Fully static operation
  • 5 V, 10 V, and 15 V parametric ratings
  • Standardized symmetrical output characteristics
  • Specified from -40 °C to +85 °C
  • Complies with JEDEC standard JESD 13-B

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
HEF40098BTProduction3.0 - 15.0CMOS-10 / +20106medium-40~85711.029.6SO16


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
( 9333 734 10653 )
Reel 13" Q1/T1 CECC
( 9333 734 10652 )
ActiveHEF40098BTBulk Pack, CECC

Quality, reliability & chemical content

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

Documentation (5)

File nameTitleTypeDate
HEF40098BHex inverting buffer: 3- stateData sheet2017-03-17
AN11051Pin FMEA HEF4000 familyApplication note2019-01-09
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18


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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
HEF40098BTHEF40098BT,653933373410653Reel 13" Q1/T1 CECCOrder product
HEF40098BTHEF40098BT,652933373410652Bulk Pack, CECCOrder product


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