Register once, drag and drop ECAD models into your CAD tool and speed up your design.

Click here for more information


2.5 V / 3.3 V 20-bit bus-interface D-type flip-flop, positive-edge trigger with 30 Ohm termination resistors; 3-state

The 74ALVT162821 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive. It is designed for VCC operation at 2.5V or 3.3V with I/O compatibility to 5V.

The 74ALVT162821 has two 10-bit, edge triggered registers, with each register coupled to a 3-State output buffer. The two sections of each register are controlled independently by the clock (nCP) and Output Enable (nOE) control gates.

Each register is fully edge triggered. The state of each D input, one set-up time before the Low-to-High clock transition, is transferred to the corresponding flip-flop's Q output.

The 3-State output buffers are designed to drive heavily loaded 3-State buses, MOS memories, or MOS microprocessors.

The active Low Output Enable (nOE) controls all ten 3-State buffers independent of the register operation. When nOE is Low, the data in the register appears at the outputs. When nOE is Highthe outputs are in high impedance "off" state, which means they will neither drive nor load the bus.

The 74ALVT162821 is designed with 30 Ω series resistance in both High and Low output stages. This design reduces the line noise in applications such as memory address drivers, clock drivers and bus receivers/transmitters. The series termination resistors reduce overshoot and undershoot and are ideal for driving memory arrays.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74ALVT162821DGG 74ALVT162821DGGS 935255460512 SOT364-1 Order product
74ALVT162821DGG 74ALVT162821DGGY 935255460518 SOT364-1 Order product
74ALVT162821DGG 74ALVT162821DGG,11 935255460112 SOT364-1 Order product
74ALVT162821DGG 74ALVT162821DGG:11 935255460118 SOT364-1 Order product

Features and benefits

  • Outputs include series resistance of 30 Ω making external termination resistors unnecessary
  • 20-bit positive-edge triggered register
  • 5 V I/O Compatible
  • Multiple VCC and GND pins minimize switching noise
  • Live insertion/extraction permitted
  • Power-up reset
  • Power-up 3-State
  • Output capability ±12 mA
  • Latch-up protection exceeds 500 mA per Jedec Std 17
  • ESD protection exceeds 2000 V per MIL STD 883 Method 3015 and 200 V per Machine Model
  • Bus hold data inputs eliminate the need for external pull-up resistors to hold unused inputs



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)Package name
74ALVT162821DGGProduction2.3 - 3.6TTL± 123.2150medium-40~859321.0TSSOP56


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9352 554 60512 )
Tube in Drypack
( 9352 554 60518 )
ActiveALVT162821Reel 13" Q1/T1 in Drypack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
74ALVT16282120-bit bus-interface D-type flip-flop; positive-edge trigger with 30 Ohm termination resistors; 3-stateData sheet2018-01-26
alvt162821alvt162821 IBIS modelIBIS model2013-04-07
alvt16alvt16 Spice modelSPICE model2013-05-06
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


File nameTitleTypeDate
alvt162821alvt162821 IBIS modelIBIS model2013-04-07
alvt16alvt16 Spice modelSPICE model2013-05-06

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74ALVT162821DGG74ALVT162821DGGS935255460512Tube in DrypackOrder product
74ALVT162821DGG74ALVT162821DGGY935255460518Reel 13" Q1/T1 in DrypackOrder product
74ALVT162821DGG74ALVT162821DGG,11935255460112Bulk PackOrder product
74ALVT162821DGG74ALVT162821DGG:11935255460118Reel 13" Q1/T1Order product


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store:

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.