Quad D-type flip-flop

The HEF40175B is a quad edge-triggered D-type flip-flop with four data inputs (D0 to D3), a clock input (CP), an overriding asynchronous master reset input (MR), four buffered outputs (Q0 to Q3), and four complementary buffered outputs (Q0 to Q3). Information on D0 to D3 is transferred to Q0 to Q3 on the LOW-to-HIGH transition of CP if MR is HIGH. When LOW, MR resets all flip-flops (Q0 to Q3 = LOW; Q0 to Q3 = HIGH), independent of CP and D0 to D3.

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
HEF40175BT HEF40175BT,653 933373470653 SOT109-1 Order product
HEF40175BT HEF40175BT,652 933373470652 SOT109-1 Order product


  • Fully static operation
  • 5 V, 10 V, and 15 V parametric ratings
  • Standardized symmetrical output characteristics
  • Specified from –40 ℃ to +125 ℃
  • Complies with JEDEC standard JESD 13-B

Target applications

  • Shift registers
  • Buffer/storage register
  • Pattern generator


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)fmax (MHz)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
HEF40175BTProduction4.5 - 15.5CMOS± 2.42545low-40~85814.739.8SO16


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
( 9333 734 70653 )
Reel 13" Q1/T1 CECC
( 9333 734 70652 )
ActiveHEF40175BTBulk Pack, CECC

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
HEF40175BTHEF40175BT,653Not available75.32.993.34E811
HEF40175BTHEF40175BT,652Not available75.32.993.34E811
Quality and reliability disclaimer

Documentation (5)

File nameTitleTypeDate
HEF40175BQuad D-type flip-flopData 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
HEF40175BTHEF40175BT,653933373470653Reel 13" Q1/T1 CECCOrder product
HEF40175BTHEF40175BT,652933373470652Bulk Pack, CECCOrder product


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