10-Bit Buffer

CY74FCT2827T

SCCS045 - May 1994 - Revised March 2000

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modified to remove devices not offered.

Copyright

1CY74FCT2827T

Features

• Function and pinout compatible with FCT, F, and

AM29827 logic

• FCT-C speed at 5.0 ns max. (Com’l),

FCT-A speed at 8.0 ns max. (Com’l)

• 25

Ω output series resistors to reduce transmission line

reflection noise

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 temp. range of –40˚C to +85˚C

• Sink current

12 mA

Source current

15 mA

Functional Description

The FCT2827T 10-bit bus driver provides high-performance

bus interface buffering for wide data/address paths or buses

carrying parity. This 10-bit buffer has NAND-ed output enables for

maximum control flexibility. The FCT2827T is designed for

high-capacitance load drive capability, while providing low-capaci-

tance bus loading at both inputs and outputs. All inputs have clamp

diodes and all outputs are designed for low-capacitance bus loading

in the high impedance state. On-chip termination resistors have

been added to the outputs to reduce system noise caused by re-

flections. The FCT2827T can be used to replace the FCT827T to

reduce noise in an existing design.

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

allow for live insertion of boards.

Logic Block Diagram

Pin Configurations

FCT2827T–3

1

2

3

4

5

6

7

8

9

10

11

12

16

17

18

19

20

24

23

22

21

13

14

FCT2827T–2

15

SOIC/QSOP

Top View

GND

Inputs

Outputs

Function

D

Y

L

L

L

L

L

H

L

H

Transparent

H

X

X

H

X

X

Z

Z

Three-State

Note:

1.

H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.