6

SN54LVC138A, SN74LVC138A

SCAS291W – MARCH 1993 – REVISED OCTOBER 2016

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Copyright © 1993–2016, Texas Instruments Incorporated

(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.

6.3 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)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

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