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74LVC161D

Presettable synchronous 4-bit binary counter; asynchronous reset

The 74LVC161 is a synchronous presettable binary counter with an internal look-head carry. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the counters may be preset HIGH or LOW. A LOW at the parallel enable input (PE) disables the counting action and causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock. Preset takes place regardless of the levels at count enable inputs (CEP and CET). A LOW at the master reset input (MR) sets Q0 to Q3 LOW regardless of the levels at input pins CP, PE, CET and CEP (thus providing an asynchronous clear function). The look-ahead carry simplifies serial cascading of the counters. Both CEP and CET must be HIGH to count. The CET input is fed forward to enable the terminal count output (TC). The TC output thus enabled will produce a HIGH output pulse of a duration approximately equal to a HIGH output of Q0. This pulse can be used to enable the next cascaded stage.

Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these devices as translators in mixed 3.3 V and 5 V environments.

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74LVC161D 74LVC161D,118 935210510118 SOT109-1 Order product

Features and benefits

  • Overvoltage tolerant inputs to 5.5 V
  • Wide supply voltage range from 1.2 V to 3.6 V
  • CMOS low power dissipation
  • Direct interface with TTL levels
  • Asynchronous reset
  • Synchronous counting and loading
  • Two count enable inputs for n-bit cascading
  • Positive edge-triggered clock
  • Complies with JEDEC standard:
    • JESD8-7A (1.65 V to 1.95 V)
    • JESD8-5A (2.3 V to 2.7 V)
    • JESD8-C/JESD36 (2.7 V to 3.6 V)
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-B exceeds 200 V
    • CDM JESD22-C101E exceeds 1000 V
  • Specified from -40 °C to +85 °C and -40 °C to +125 °C

Applications

Parametrics

Type numberProduct statusVCC (V)Output drive capability (mA)Logic switching levelstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74LVC161DProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~125929.651.7SO16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74LVC161D74LVC161D,118
( 9352 105 10118 )
Active74LVC161D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74LVC161D74LVC161D,112
( 9352 105 10112 )
Discontinued / End-of-life74LVC161D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack

Discontinuation information

Type numberOrderable part numberOrdering codeLast time buy dateLast time delivery dateReplacement productStatusComments
74LVC161D74LVC161D,112935210510112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74LVC161D74LVC161D,11874LVC161D19.30.52E911

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74LVC161D74LVC161D,11274LVC161D19.30.52E911
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74LVC161Presettable synchronous 4-bit binary counter; asynchronous resetData sheet2021-09-22
AN11009Pin FMEA for LVC familyApplication note2019-01-09
lvc161lvc161 IBIS modelIBIS model2013-04-07
lvclvc Spice modelSPICE model2013-05-06
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

Support

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Models

File nameTitleTypeDate
lvc161lvc161 IBIS modelIBIS model2013-04-07
lvclvc Spice modelSPICE model2013-05-06

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74LVC161D74LVC161D,118935210510118Reel 13" Q1/T1Order product

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

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.