SN54ALS652, SN54ALS653, SN54AS651, SN54AS652

SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN74AS651, SN74AS652

OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

SDAS066F – DECEMBER 1983 – REVISED OCTOBER 1996

15

POST OFFICE BOX 655303

switching characteristics (see Figure 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 680 Ω (A outputs),

R1 = R2 = 500

Ω (B outputs),

TA = MIN to MAX†

UNIT

SN54ALS653

SN74ALS653

MIN

MAX

MIN

MAX

fmax

25

35

MHz

tPLH

CLKBA

A

16

71

16

64

ns

tPHL

CLKBA

A

6

24

6

22

ns

tPLH

CLKAB

B

10

35

10

30

ns

tPHL

CLKAB

B

5

20

5

17

ns

tPLH

A

B

5

20

5

18

ns

tPHL

A

B

1.5

18

2

15

ns

tPLH

B

A

8

63

12

56

ns

tPHL

B

A

2

18

2

15

ns

tPLH

SBA‡

A

12

68

19

62

ns

tPHL

(with B high)

A

5

27

5

25

ns

tPLH

SBA‡

A

12

68

19

62

ns

tPHL

(with B low)

A

5

27

5

25

ns

tPLH

SAB‡

B

8

30

15

35

ns

tPHL

(with A high)

B

6

25

6

22

ns

tPLH

SAB‡

B

12

40

8

25

ns

tPHL

(with A low)

B

6

25

6

22

ns

tPLH

OEBA

A

6

35

6

30

ns

tPHL

OEBA

A

6

27

6

24

ns

tPZH

OEAB

B

7

25

8

22

ns

tPZL

OEAB

B

6

25

6

22

ns

tPHZ

OEAB

B

1

16

1

14

ns

tPLZ

OEAB

B

2

21

2

16

ns

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

‡ These parameters are measured with the internal output state of the storage register opposite that of the bus input.