Philips Semiconductors

Product specification

74F2244

Octal buffer with 30

Ω equivalent output termination

(3-State)

1994 Dec 05

3

IEC/IEEE SYMBOL

1

2D

EN1

EN2

1

2

19

2

4

6

8

17

15

13

11

18

16

14

12

3

5

7

9

SF00229

FUNCTION TABLE

INPUTS

OUTPUTS

OEa

Ia

OEb

Ib

Ya

Yb

L

L

L

L

L

L

L

H

L

H

H

H

H

X

H

X

Z

Z

Notes to function table

H = High voltage level

L

= Low voltage level

X = Don’t care

Z = High impedance ”off” state

LOGIC DIAGRAM

VCC = Pin 20

Ia0

SF00236

OEa

Ia3

Ia2

Ia1

2

4

6

8

1

Ya0

Ya1

Ya2

Ya3

18

16

14

12

Ib0

Ib1

Ib2

Ib3

OEb

17

15

13

11

10

2

5

7

9

Yb0

Yb1

Yb2

Yb3

GND = Pin 10

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the

operating free air temperature range.)

SYMBOL

PARAMETER

RATING

UNIT

Supply voltage

–0.5 to +7.0

V

Input voltage

–0.5 to +7.0

V

Input current

–30 to +5

mA

Voltage applied to output in high output state

V

Current applied to output in low output state

10

mA

Operating free air temperature range

0 to +70

Storage temperature range

–65 to +150

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

PARAMETER

MIN

NOM

MAX

Supply voltage

4.5

5.0

5.5

V

High–level input voltage

2.0

V

Low–level input voltage

0.8

V

Input clamp current

–18

mA

High–level output current

–15

mA

Low–level output current

5

mA

Operating free air temperature range

0

+70