SN54ALS1244A, SN74ALS1244A

OCTAL BUFFERS AND DRIVERS

WITH 3-STATE OUTPUTS

SDAS186B – JULY 1990 – REVISED JANUARY 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

SN54ALS1244A

SN74ALS1244A

MIN

MAX

MIN

MAX

tPLH

A

Y

3

21

3

14

ns

tPHL

A

Y

3

16

3

14

ns

tPZH

OE

Y

6

28

6

22

ns

tPZL

OE

Y

6

26

6

22

ns

tPHZ

OE

Y

2

15

2

13

ns

tPLZ

OE

Y

3

25

3

16

ns

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