3-to-8 line decoder/demultplexer; inverting

The 74LV138 is a low-voltage Si-gate CMOS device that is pin and function compatible with 74HC138 and 74HCT138.

The 74LV138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive active LOW outputs (Y0 to Y7).

There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.

This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74LV138 devices and one inverter. The 74LV138 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.

Features and benefits

  • Wide operating voltage: 1.0 V to 5.5 V
  • Optimized for low voltage applications: 1.0 V to 3.6 V
  • Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V
  • Typical output ground bounce < 0.8 V at VCC = 3.3 V and Tamb = 25 °C
  • Typical HIGH-level output voltage (VOH) undershoot: > 2 V at VCC = 3.3 V and Tamb = 25 °C
  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Active LOW mutually exclusive outputs
  • 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


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74LV138BQProduction1.0 - 5.5TTL± 1212low-40~125836.550DHVQFN16
74LV138DProduction1.0 - 5.5TTL± 1212low-40~125814.539.5SO16
Not for design inSSOP16
74LV138PWProduction1.0 - 5.5TTL± 1212low-40~1251152.243TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveLV13874LV138BQ,115
( 9352 855 77115 )
Reel 13" Q1/T1Active74LV138D74LV138D,118
( 9350 631 90118 )
Bulk PackActive74LV138D74LV138D,112
( 9350 631 90112 )

Reel 13" Q1/T1ActiveLV13874LV138DB,118
( 9351 659 60118 )
Bulk PackActiveLV13874LV138DB,112
( 9351 659 60112 )
Reel 13" Q1/T1ActiveLV13874LV138PW,118
( 9351 743 90118 )
Bulk PackActiveLV13874LV138PW,112
( 9351 743 90112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74LV138BQ74LV138BQ,11574LV138BQAlways Pb-free144.910.239.78E711
74LV138D74LV138D,11874LV138Dweek 6, 2004144.910.239.78E711
74LV138D74LV138D,11274LV138Dweek 6, 2004144.910.239.78E711
74LV138DB,11874LV138DBweek 12, 200511
74LV138DB,11274LV138DBweek 12, 200511
74LV138PW74LV138PW,11874LV138PWweek 17, 2005144.910.239.78E711
74LV138PW74LV138PW,11274LV138PWweek 17, 2005144.910.239.78E711
Quality and reliability disclaimer

Documentation (13)

File nameTitleTypeDate
74LV1383-to-8 line decoder/demultplexer; invertingData sheet2018-02-05
Nexperia_Selection_guide_2020Nexperia Selection Guide 2020Selection guide2020-01-31
Nexperia_Selection_guide_2021Nexperia Selection Guide 2021Selection guide2021-01-08
lvlv 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
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
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
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
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave 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 bodyPackage information2020-04-21


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
lvlv Spice modelSPICE model2013-05-06

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