74LVC138AD

3-to-8 line decoder/demultiplexer; inverting

The 74LVC138A 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 outputs (Y0 to Y7) that are LOW when selected.

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 74LVC138A devices and one inverter. The 74LVC138A 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

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74LVC138AD 74LVC138AD,118 935260745118 SOT109-1 Order product
74LVC138AD 74LVC138AD,112 935260745112 SOT109-1 Order product

Features

  • 5 V tolerant inputs for interfacing with 5 V logic
  • Wide supply voltage range from 1.2 to 3.6 V
  • CMOS low power consumption
  • Direct interface with TTL levels
  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Mutually exclusive outputs
  • Output drive capability 50 Ω transmission lines at 125 °C
  • 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 from -40 °C to +125 °C

Target applications

Parametrics

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
74LVC138ADProduction1.2 - 3.6CMOS/LVTTL± 242.7low-40~1259310.152.8SO16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74LVC138AD74LVC138AD,118
( 9352 607 45118 )
Active74LVC138AD
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1
74LVC138AD,112
( 9352 607 45112 )
Active74LVC138ADBulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74LVC138AD74LVC138AD,11874LVC138AD123.83.872.58E811
74LVC138AD74LVC138AD,11274LVC138AD123.83.872.58E811
Quality and reliability disclaimer

Documentation (8)

File nameTitleTypeDate
74LVC138A3-to-8 line decoder/demultiplexer; invertingData sheet2019-01-23
AN11009Pin FMEA for LVC familyApplication note2019-01-09
lvc138alvc138a 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
SOT109-1_118SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-24
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18

Support

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Models

File nameTitleTypeDate
lvc138alvc138a IBIS modelIBIS model2013-04-07
lvclvc Spice modelSPICE model2013-05-06

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74LVC138AD74LVC138AD,118935260745118Reel 13" Q1/T1Order product
74LVC138AD74LVC138AD,112935260745112Bulk PackOrder product

Sample

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