SCAS291W MARCH   1993  – October 2016 SN54LVC138A , SN74LVC138A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics—SN54LVC138A
    7. 6.7 Switching Characteristics—SN74LVC138A
    8. 6.8 Operating Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 3-Line to 8-Line Decoder
      2. 8.3.2 1.65-V to 3.6-V Operation With Inputs up to 5.5 V
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC Supply voltage –0.5 6.5 V
VI Input voltage(2) –0.5 6.5 V
VO Output voltage(2)(3) –0.5 VCC + 0.5 V
IIK Input clamp current VI < 0 –50 mA
IOK Output clamp current VO < 0 –50 mA
IO Continuous output current ±50 mA
Continuous current through VCC or GND ±100 mA
Tstg Storage temperature –65 150 °C
TJ Junction temperature 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
(3) The value of VCC is provided in the recommended operating conditions table.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) 2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) 1000
Machine model (MM) 200
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN MAX UNIT
VCC Supply voltage Operating SN54LVC138A(1) 2 3.6 V
SN74LVC138A(1) 1.65 3.6
Data retention only 1.5
VIH High-level input voltage VCC = 1.65 V to 1.95 V SN74LVC138A(1) 0.65 × VCC V
VCC = 2.3 V to 2.7 V SN74LVC138A(1) 1.7
VCC = 2.7 V to 3.6 V 2
VIL Low-level input voltage VCC = 1.65 V to 1.95 V SN74LVC138A(1) 0.35 × VCC V
VCC = 2.3 V to 2.7 V SN74LVC138A(1) 0.7
VCC = 2.7 V to 3.6 V 0.8
VI Input voltage 0 5.5 V
VO Output voltage 0 VCC V
IOH High-level output current VCC = 1.65 V SN74LVC138A(1) –4 mA
VCC = 2.3 V SN74LVC138A(1) –8
VCC = 2.7 V –12
VCC = 3 V –24
IOL Low-level output current VCC = 1.65 V SN74LVC138A(1) 4 mA
VCC = 2.3 V SN74LVC138A(1) 8
VCC = 2.7 V 12
VCC = 3 V 24
Δt/Δv Input transition rise or fall rate 10 ns/V
TA Operating free-air temperature SN54LVC138A(1) –55 125 °C
SN74LVC138A(1) –40 85
(1) All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See the TI application report, Implications of Slow or Floating CMOS Inputs.

6.4 Thermal Information

THERMAL METRIC(1) SNx4LVC138A UNIT
FK
(LCCC)		 J
(CDIP)		 W
(CFP)		 D
(SOIC)		 DB
(SSOP)		 DGV
(TVSOP)		 ZQN
(BGA MICROSTAR JUNIOR)		 PW
(TSSOP)		 RSV
(UQFN)
20
PINS		 16
PINS		 16
PINS		 16
PINS		 16
PINS		 16
PINS		 20
PINS		 16
PINS		 16
PINS
RθJA Junction-to-ambient thermal resistance 79.2 85.8 138.0 86.8 100.1 122.1 84 108.9 168.9 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 56.5 49.3 74.6 47.9 50.6 47.4 56.9 42.5 78.2 °C/W
RθJB Junction-to-board thermal resistance 55.2 64.9 127.7 43.8 50.7 53.8 46.1 54.5 96.4 °C/W
ψJT Junction-to-top characterization parameter 49.8 37.4 50 15.7 14.3 4.6 3 4.4 4.2 °C/W
ψJB Junction-to-board characterization parameter 55.0 69.5 115.7 43.5 50.1 53.2 48.9 53.8 96.5 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC MIN TYP(1) MAX UNIT
VOH High-level output voltage IOH = –100 µA SN74LVC138A 1.65 V to 3.6 V VCC – 0.2 V
SN54LVC138A 2.7 V to 3.6 V VCC – 0.2
IOH = –4 mA SN74LVC138A 1.65 V 1.2
IOH = –8 mA SN74LVC138A 2.3 V 1.7
IOH = –12 mA 2.7 V 2.2
3 V 2.4
IOH = –24 mA 3 V 2.2
VOL Low-level output voltage IOL = 100 µA SN74LVC138A 1.65 V to 3.6 V 0.2 V
SN54LVC138A 2.7 V to 3.6 V 0.2
IOL = 4 mA SN74LVC138A 1.65 V 0.45
IOL = 8 mA SN74LVC138A 2.3 V 0.7
IOL = 12 mA 2.7 V 0.4
IOL = 24 mA 3 V 0.55
II Input current VI = 5.5 V or GND 3.6 V ±5 µA
ICC Supply current VI = VCC or GND, IO = 0 3.6 V 10 µA
ΔICC Change in supply current One input at VCC – 0.6 V,
Other inputs at VCC or GND		 2.7 V to 3.6 V 500 µA
Ci Input capacitance VI = VCC or GND 3.3 V 5 pF
(1) All typical values are at VCC = 3.3 V, TA = 25°C.

6.6 Switching Characteristics—SN54LVC138A

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 TEST CONDITIONS MIN MAX UNIT
tpd Propagation (delay) time A or B or C Y VCC = 2.7 V 7.9 ns
VCC = 3.3 V ± 0.3 V 1 6.7
G2A or G2B VCC = 2.7 V 7.4
VCC = 3.3 V ± 0.3 V 1 6.5
G1 VCC = 2.7 V 6.4
VCC = 3.3 V ± 0.3 V 1 5.8

6.7 Switching Characteristics—SN74LVC138A

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 TEST CONDITIONS MIN MAX UNIT
tpd Propagation (delay) time A or B or C Y VCC = 1.8 V ± 0.15 V 1 22 ns
VCC = 2.5 V ± 0.2 V 1 9.9
VCC = 2.7 V 1 7.9
VCC = 3.3 V ± 0.3 V 1 6.7
G2A or G2B VCC = 1.8 V ± 0.15 V 1 21
VCC = 2.5 V ± 0.2 V 1 9.4
VCC = 2.7 V 1 7.4
VCC = 3.3 V ± 0.3 V 1 6.5
G1 VCC = 1.8 V ± 0.15 V 1 20.3
VCC = 2.5 V ± 0.2 V 1 8.4
VCC = 2.7 V 1 6.4
VCC = 3.3 V ± 0.3 V 1 5.8
tsk(o) Skew (time), output — — VCC = 3.3 V ± 0.3 V 1 ns

6.8 Operating Characteristics

TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
Cpd Power dissipation capacitance f = 10 MHz VCC = 1.8 V 25 pF
VCC = 2.5 V 26
VCC = 3.3 V 27

6.9 Typical Characteristics

SN54LVC138A SN74LVC138A D002_PropagationDelay.gif Figure 1. Maximum Propagation Delay vs Supply Voltage