74LVC161

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.

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

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
74LVC161BQProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~1259313.862DHVQFN16
74LVC161DProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~125929.651.7SO16
74LVC161PWProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~1251254.654.7TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74LVC161BQ
DHVQFN16
(SOT763-1)
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveLVC16174LVC161BQ,115
( 9352 756 12115 )
74LVC161D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1Active74LVC161D74LVC161D,118
( 9352 105 10118 )
74LVC161PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveLVC16174LVC161PW,118
( 9352 105 30118 )

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

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74LVC161D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk PackDiscontinued / End-of-life74LVC161D74LVC161D,112
( 9352 105 10112 )
74LVC161PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeLVC16174LVC161PW,112
( 9352 105 30112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74LVC161D935210510112
74LVC161PW935210530112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74LVC161BQ74LVC161BQ,11574LVC161BQAlways Pb-free19.30.52E911
74LVC161D74LVC161D,11874LVC161DAlways Pb-free19.30.52E911
74LVC161PW74LVC161PW,11874LVC161PWweek 10, 200519.30.52E911

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

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74LVC161D74LVC161D,11274LVC161DAlways Pb-free19.30.52E911
74LVC161PW74LVC161PW,11274LVC161PWweek 10, 200519.30.52E911
Quality and reliability disclaimer

Documentation (13)

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
Nexperia_Selection_guide_2020Nexperia Selection Guide 2020Selection guide2020-01-31
Nexperia_Selection_guide_2021Nexperia Selection Guide 2021Selection guide2021-01-08
lvclvc Spice modelSPICE model2013-05-06
SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2020-04-21
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21

Support

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Models

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

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