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74HCT166DB NRND ECAD models PCB Symbol, Footprint & ECAD Model

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.

Not recommended for new designs (NRND), click here for the alternative product.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT166DB 74HCT166DB,118 935189700118 SOT338-1 Order product
74HCT166DB 74HCT166DB,112 935189700112 SOT338-1 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)Package name
74HCT166DB
NRND
Not for design in4.5 - 5.5TTL+/- 4.023508low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HCT166DB
NRND
74HCT166DB,118
( 9351 897 00118 )
ActiveHCT166
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HCT166DB,112
( 9351 897 00112 )
ActiveHCT166Bulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HCT166DB
NRND
74HCT166DB,11874HCT166DB11
74HCT166DB
NRND
74HCT166DB,11274HCT166DB11
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
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HCT166DB74HCT166DB,118935189700118Reel 13" Q1/T1Order product
74HCT166DB74HCT166DB,112935189700112Bulk PackOrder product

Sample

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