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74HC299D ECAD models PCB Symbol, Footprint & ECAD Model

8-bit universal shift register; 3-state

The 74HC299 is an 8-bit universal shift register with 3-state outputs. It contains eight edge-triggered D-type flip-flops and the interstage logic necessary to perform synchronous shift-right, shift-left, parallel load and hold operations. The type of operation is determined by the mode select inputs S0 and S1. Pins I/O0 to I/O7 are flip-flop 3-state buffer outputs which allow them to operate as data inputs in parallel load mode. The serial outputs Q0 and Q7 are used for expansion in serial shifting of longer words. A LOW signal on the asynchronous master reset input MR overrides the Sn and clock CP inputs and resets the flip-flops. All other state changes are initiated by the rising edge of the clock pulse. Inputs can change when the clock is either state, provided that the recommended set-up and hold times are observed. A HIGH signal on the 3-state output enable inputs OE1 or OE2 disables the 3-state buffers and the I/On outputs assume a high-impedance OFF-state. In this condition, the shift, hold, load and reset operations can still occur. The 3-state buffers are also disabled by HIGH signals on both S0 and S1, when in preparation for a parallel load operation. Inputs include clamp diodes. This enables 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
74HC299D 74HC299D,653 933713540653 SOT163-1 Order product
74HC299D 74HC299D,652 933713540652 SOT163-1 Order product

Features

  • CMOS input levels
  • Multiplexed inputs/outputs provide improved bit density
  • Four operating modes:
    • Shift left
    • Shift right
    • Hold (store)
    • Load data
  • Operates with output enable or at high-impedance OFF-state
  • 3-state outputs drive bus lines directly
  • Cascadable for n-bit word lengths
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • 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
74HC299DProduction2.0 - 6.0CMOS± 7.819548low-40~125636.038SO20

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC299D74HC299D,653
( 9337 135 40653 )
Active74HC299D
SO20
(SOT163-1)
SOT163-1Reel 13" Q1/T1 CECC
74HC299D,652
( 9337 135 40652 )
Active74HC299DBulk Pack, CECC

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74HC299D74HC299D,65374HC299D84.96.621.51E811
74HC299D74HC299D,65274HC299D84.96.621.51E811
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
74HC2998-bit universal shift register; 3-stateData sheet2019-01-17
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyOutline drawing2018-10-18

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC299D74HC299D,653933713540653Reel 13" Q1/T1 CECCOrder product
74HC299D74HC299D,652933713540652Bulk Pack, CECCOrder product

Sample

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