74HC2G66-Q100; 74HCT2G66-Q100

Dual single-pole single-throw analog switch

The 74HC2G66-Q100; 74HCT2G66-Q100 is a dual single pole, single‑throw analog switch. Each switch has two input/output terminals (nY and nZ) and a digital enable input (nE). When nE is LOW, the analog switch is turned off. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.


  • Automotive product qualification in accordance with AEC-Q100 (Grade 1)
    • Specified from -40°C to +85°C and from -40°C to +125°C
  • Wide supply voltage range from 2.0 V to 10.0V for 74HC2G66‑Q100
  • Very low ON resistance:
    • 41Ω (typ.) at VCC = 4.5V
    • 30Ω (typ.) at VCC = 6.0V
    • 21Ω (typ.) at VCC = 9.0V
  • High noise immunity
  • Low power dissipation
  • 25mA continuous switch current
  • Multiple package options
  • ESD protection:
    • MIL-STD-883, method 3015 exceeds 2000 V
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V (C = 200pF, R = 0Ω)

Target applications


Type numberProduct statusConfigurationVCC (V)RON (Ω)RON (FLAT) (Ω)Logic switching levelsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC2G66DC-Q100ProductionSPST-NO2.0 - 9.010523CMOSvery low-40~12519428.3104VSSOP8
74HC2G66DP-Q100ProductionSPST-NO2.0 - 9.010523CMOSvery low-40~12520016.3101TSSOP8
74HCT2G66DC-Q100ProductionSPST-NO4.5 - 5.511823TTLvery low-40~12519428.3104VSSOP8
74HCT2G66DP-Q100ProductionSPST-NO4.5 - 5.511823TTLvery low-40~12520016.3101TSSOP8


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT765-1Reel 7" Q3/T4, ReverseActiveH6674HC2G66DC-Q100H
( 9353 008 55125 )
SOT505-2Reel 7" Q3/T4, ReverseActiveH6674HC2G66DP-Q100H
( 9353 008 56125 )
SOT505-2Reel 7" Q3/T4, ReverseActiveStandard Marking74HC2G66DP-Q100/AH
( 9356 910 42125 )
SOT765-1Reel 7" Q3/T4, ReverseActiveT6674HCT2G66DC-Q100H
( 9353 008 57125 )
SOT505-2Reel 7" Q3/T4, ReverseActiveT6674HCT2G66DP-Q100H
( 9353 008 58125 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRMSLMSL leadfree
74HC2G66DC-Q10074HC2G66DC-Q100H74HC2G66DC-Q100Always Pb-free84.911
74HC2G66DP-Q10074HC2G66DP-Q100H74HC2G66DP-Q100Always Pb-free84.911
74HCT2G66DC-Q10074HCT2G66DC-Q100H74HCT2G66DC-Q100Always Pb-free84.911
74HCT2G66DP-Q10074HCT2G66DP-Q100H74HCT2G66DP-Q100Always Pb-free84.911
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74HC_HCT2G66_Q100Dual single-pole single-throw analog switchData sheet2018-11-06
AN10161PicoGate Logic footprintsApplication note2002-10-29
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
SOT505-2_125TSSOP8: Reel pack, reverse; SMD, 7" Q3/T4 Standard product orientation Orderable part number ending ,125 or H Ordering code (12NC) ending 125Packing2013-05-02
SOT505-2plastic, thin shrink small outline package; 8 leads; 0.65 mm pitch; 3 mm x 3 mm x 1.1 mm bodyOutline drawing2018-11-14
SOT765-1plastic, very thin shrink small outline package; 8 leads; 0.5 mm pitch; 2 mm x 2.3 mm x 1 mm bodyOutline drawing2018-11-14
SOT765-1_125VSSOP8; Reel pack for SMD, 7''; Q3/T4 product orientationPacking2020-01-13


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