8-Bit Buffers/Line Drivers

CY54/74FCT240T

CY54/74FCT244T

SCCS017 - May 1994 - Revised February 2000

Copyright

Features

• Function, pinout, and drive compatible with FCT and

F logic

• FCT-D speed at 3.6 ns max. (Com’l FCT244 only),

FCT-C speed at 4.1 ns max. (Com’l),

FCT-A speed at 4.8 ns max. (Com’l)

FCT functions

• Edge-rate control circuitry for significantly improved

noise characteristics

• Power-off disable feature

• ESD > 2000V

• Matched rise and fall times

• Fully compatible with TTL input and output logic levels

• Extended commercial range of

−40˚C to +85˚C

• Sink current

64 mA (Com’l), 48 mA (Mil)

Source current

32 mA (Com’l), 12 mA (Mil)

Functional Description

The FCT240T and FCT244T are octal buffers and line drivers

designed to be employed as memory address drivers, clock

drivers, and bus-oriented transmitters/receivers. The devices

provide speed and drive capabilities equivalent to their fastest

bipolar logic counterparts while reducing power consumption. The

input and output voltage levels allow direct interface with TTL,

NMOS, and CMOS devices without external components.

The outputs are designed with a power-off disable feature to

allow for live insertion of boards.

Logic Block Diagram

FCT240T–2

4

8

9

10

11

12

76 5

1516 17 18

3

2

1

20

13

14

19

GND

Top View

LCC

FCT240T–1

1

2

3

4

5

6

7

8

9

10

11

12

16

17

18

19

20

13

14

GND

FCT240T–3

15

DIP/SOIC/QSOP

Top View

Pin Configurations

4

8

9

10

11

12

76 5

1516 17 18

3

2

1

20

13

14

19

GND

Top View

LCC

1

2

3

4

5

6

7

8

9

10

11

12

16

17

18

19

20

13

14

GND

15

DIP/SOIC/QSOP

Top View

FCT240T–4

FCT240T–5

FCT240T–6

FCT240T

FCT240T

FCT244T

FCT244T

FCT240T

FCT244T