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

10

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,

R1 = 500

Ω,

R2 = 500

Ω,

TA = MIN to MAX†

UNIT

SN74ALS651A

MIN

MAX

fmax

40

MHz

tPLH

CLKBA or CLKAB

AorB

8

32

ns

tPHL

CLKBA or CLKAB

A or B

5

17

ns

tPLH

AorB

BorA

2

18

ns

tPHL

A or B

B or A

2

10

ns

tPLH

SBA or SAB‡

AorB

8

38

ns

tPHL

(with A or B high)

A or B

6

21

ns

tPLH

SBA or SAB‡

AorB

8

25

ns

tPHL

(with A or B low)

A or B

7

21

ns

tPZH

OEBA

A

3

20

ns

tPZL

OEBA

A

5

18

ns

tPHZ

OEBA

A

2

9

ns

tPLZ

OEBA

A

3

12

ns

tPZH

OEAB

B

3

22

ns

tPZL

OEAB

B

6

21

ns

tPHZ

OEAB

B

2

12

ns

tPLZ

OEAB

B

2

14

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.