SN54ALS193A, SN74ALS193A

SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS

WITH DUAL CLOCK AND CLEAR

SDAS211C – DECEMBER 1982 – REVISED JULY 1996

6

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 = R2 = 500

TA = MIN to MAX†

UNIT

(INPUT)

(OUTPUT)

SN54ALS193A

SN74ALS193A

MIN

MAX

MIN

MAX

fmax

25

30

MHz

tPLH

UP

CO

3

20

3

16

ns

tPHL

UP

CO

3

21

5

18

ns

tPLH

DOWN

BO

4

20

4

16

ns

tPHL

DOWN

BO

5

22

5

18

ns

tPLH

UP or DOWN

Any Q

3

27

3

19

ns

tPHL

UP or DOWN

Any Q

4

23

4

17

ns

tPLH

LOAD

Any Q

7

38

7

30

ns

tPHL

LOAD

Any Q

8

37

8

28

ns

tPHL

CLR

Any Q

5

20

5

17

ns

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