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TIMING REQUIREMENTS

SWITCHING CHARACTERISTICS

SN54HC195

4-BIT PARALLEL-ACCESS SHIFT REGISTERS

SCLS124A – DECEMBER 1992 – REVISED NOVEMBER 2007

over recommended operating free-air temperature range (unless otherwise noted)

SN54HC195

UNIT

MIN

MAX

MIN

MAX

2 V

0

6

0

4.2

Clock frequency

4.5 V

0

31

0

21

MHz

6 V

0

36

0

25

2 V

80

120

CLK high or low

4.5 V

16

24

6 V

14

20

Pulse duration

ns

2 V

80

120

CLR low

4.5 V

16

24

6 V

14

20

2 V

100

150

Setup time,

SH/LD, or serial and parallel data, or CLR

4.5 V

20

30

ns

before CLK

↑

inactive

6 V

17

26

2 V

0

0

Hold time,

SH/LD, or serial and parallel data, or CLR

4.5 V

0

0

ns

after CLK

↑

inactive

6 V

0

0

(1)

SN54HC195

FROM

TO

PARAMETER

UNIT

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

2 V

6

12

4.2

4.5 V

31

50

21

MHz

6 V

36

60

25

2 V

67

145

220

CLK

or

4.5 V

17

29

44

ns

6 V

14

25

37

2 V

67

150

225

CLR

or

4.5 V

17

30

45

ns

6 V

13

26

38

2 V

28

75

110

Any

4.5 V

8

15

22

ns

6 V

6

13

19

Power dissipation capacitance

65 pF typ

(1)

Load circuit and voltage waveforms are shown in previous pages.

Copyright © 1992–2007, Texas Instruments Incorporated

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