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Low Power Schottky Logic – 54LS138

Rev 1.0

21/11/17

4

AC Electrical Characteristics

LIMITS

PARAMETER

SYMBOL

CONDITIONS

DELAY

LEVELS

MIN

TYP

MAX

UNITS

tPLH

2

-

13

20

Propagation Delay,

Address to Output

tPHL

VCC = 5V, CL = 15pF

2

-

DISCLAIMER: The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to

any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Silicon Supplies Ltd

hereby disclaims any and all warranties and liabilities of any kind.

LIFE SUPPORT POLICY: Silicon Supplies Ltd components may be used in life support devices or systems only with the express written

approval of Silicon Supplies Ltd, if a failure of such components can reasonably be expected to cause the failure of that life support device or system or

to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to

support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may

be endangered.

27

41

ns

tPLH

3

-

18

27

Propagation Delay, Other

Input High

ns

tPHL

VCC = 5V, CL = 15pF

3

-

26

39

tPLH

2

-

12

18

Propagation Delay, G2B

or G2A Enable to Output

tPHL

VCC = 5V, CL = 15pF

2

-

21

ns

32

tPLH

3

-

17

26

Propagation Delay, G1

Enable to Output

tPHL

VCC = 5V, CL = 15pF

3

-

25

ns

38

4. Not production tested in die form, characterized by chip design and tested in package.

Logic Diagram

Switching Waveforms