SN54ALS996, SN74ALS996

8-BIT D-TYPE EDGE-TRIGGERED READ-BACK LATCHES

SDAS098B – OCTOBER 1984 – REVISED JANUARY 1995

2–4

POST OFFICE BOX 655303

recommended operating conditions

SN54ALS996

SN74ALS996

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

All inputs

2

VIH

High-level input voltage

All inputs except OE, RD

2

V

OE, RD

2.2

VIL

Low-level input voltage

0.8

0.8

V

IOH

High level output current

Q

–1

– 2.6

mA

IOH

High-level output current

D

– 0.4

– 0.4

mA

Q

12

24

IOL

Low-level output current

Q

48†

mA

D

8

8

fclock

Clock frequency

0

35

0

35

MHZ

CLR low

10

10

tw

Pulse duration

CLK low

14.5

14.5

ns

CLK high

14.5

14.5

Data before CLK

↑

15

15

t

Setup time

EN low before CLK

↑

10

10

ns

tsu

Setup time

CLK high before EN

↑‡

15

15

ns

CLR high (inactive) before CLK

↑

10

10

Data after CLK

↑

1

0

th

Hold time

EN low after CLK

↑

5

5

ns

RD high after CLK

↑§

5

5

TA

Operating free-air temperature

–55

125

0

70

°C

† Applies only to the -1 version and only if VCC is maintained between 4.75 V and 5.25 V

‡ This setup time ensures that EN will not false clock the data register.

§ This hold time ensures that there will be no conflict on the input data bus.