CY54FCT540T, CY74FCT540T

8-BIT BUFFERS/LINE DRIVERS

WITH 3-STATE OUTPUTS

SCCS029A – MAY 1994 – REVISED OCTOBER 2001

2

POST OFFICE BOX 655303

FUNCTION TABLE

INPUTS

OUTPUT

OEA

OEB

D

O

L

L

L

H

L

LH

L

H

H

X

Z

H = High logic level, L = Low logic level,

X = Don’t care, Z = High-impedance state

logic diagram (positive logic)

OEA

OEB

To Seven Other Channels

D0

O0

1

19

218

Supply voltage range to ground potential

–0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC input voltage range

–0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC output voltage range

–0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC output current (maximum sink current/pin)

120 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

68

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 135°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.

Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions (see Note 2)

CY54FCT540T

CY74FCT540T

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.75

5

5.25

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level output current

–12

–32

mA

IOL

Low-level output current

48

64

mA

TA

Operating free-air temperature

–55

125

–40

85

°C

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.