SN54AS821A, SN74AS821A

10-BIT BUS-INTERFACE FLIP-FLOPS

WITH 3-STATE OUTPUTS

SDAS230A – DECEMBER 1983 – REVISED AUGUST 1995

4

POST OFFICE BOX 655303

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

R1 = 500

R2 = 500

TA = MIN to MAX†

UNIT

SN54AS821A

SN74AS821A

MIN

MAX

MIN

MAX

tPLH

CLK

An Q

3.5

9

3.5

7.5

ns

tPHL

CLK

Any Q

3.5

14

3.5

13

ns

tPZH

OE

An Q

4

12

3

11

ns

tPZL

OE

Any Q

4

13

4

12

ns

tPHZ

OE

Any Q

1

10

1

8

ns

tPLZ

OE

Any Q

1

10

1

8

ns

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