74HC166D

8-bit parallel-in/serial-out shift register

The 74HC166; 74HCT166 is an 8-bit serial or parallel-in/serial-out shift register. The device features a serial data input (DS), eight parallel data inputs (D0 to D7) and a serial output (Q7). When the parallel enable input (PE) is LOW, the data from D0 to D7 is loaded into the shift register on the next LOW‑to‑HIGH transition of the clock input (CP). When PE is HIGH, data enters the register serially at DS with each LOW‑to‑HIGH transition of CP. When the clock enable input (CE) is LOW data is shifted on the LOW‑to‑HIGH transitions of CP. A HIGH on CE disables the CP input. Inputs include clamp diodes which enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HC166D 74HC166D,653 933714550653 SOT109-1 Order product
74HC166D 74HC166D,652 933714550652 SOT109-1 Order product

Features

  • Synchronous parallel-to-serial applications
  • Synchronous serial input for easy expansion
  • Complies with JEDEC standard no. 7A
  • Input levels:
    • For 74HC166: CMOS level
    • For 74HCT166: TTL level
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Target applications

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)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
74HC166DProduction2.0 - 6.0CMOS± 5.215638low-40~125741.232SO16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC166D74HC166D,653
( 9337 145 50653 )
Active74HC166D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECC
74HC166D,652
( 9337 145 50652 )
Active74HC166DBulk Pack, CECC

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74HC166D74HC166D,65374HC166D84.96.621.51E811
74HC166D74HC166D,65274HC166D84.96.621.51E811
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74HC_HCT1668-bit parallel-in, serial-out shift registerData sheet2017-03-30
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
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

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC166D74HC166D,653933714550653Reel 13" Q1/T1 CECCOrder product
74HC166D74HC166D,652933714550652Bulk Pack, CECCOrder product

Sample

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