SN74HC244EP

OCTAL BUFFER AND LINE DRIVER

WITH 3STATE OUTPUTS

SCLS463A − JULY 2002 − REVISED JANUARY 2004

2

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

logic diagram (positive logic)

1

2

4

6

8

19

11

13

15

17

3

5

7

9

12

14

16

18

1A1

1A2

1A3

1A4

1Y1

2A1

2A2

2A3

2A4

2Y1

1Y2

1Y3

1Y4

2Y2

2Y3

2Y4

2OE

1OE

absolute maximum ratings over operating free-air temperature range†

Supply voltage range, VCC

−0.5 V to 7 V

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

Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1)

±20 mA

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

Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1)

±20 mA

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

Continuous output current, IO (VO = 0 to VCC)

±35 mA

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

Continuous current through VCC or GND

±70 mA

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

Package thermal impedance,

θJA (see Note 2): DW package

58

°C/W

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

PW package

83

°C/W

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

Storage temperature range, Tstg

−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.

NOTES:

1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions

MIN

NOM

MAX

UNIT

VCC

Supply voltage

2

5

6

V

VCC = 2 V

1.5

VIH

High-level input voltage

VCC = 4.5 V

3.15

V

VIH

High-level input voltage

VCC = 6 V

4.2

V

VCC = 2 V

0

0.5

VIL

Low-level input voltage

VCC = 4.5 V

0

1.35

V

VIL

Low-level input voltage

VCC = 6 V

0

1.8

V

VI

Input voltage

0

VCC

V

VO

Output voltage

0

VCC

V

VCC = 2 V

0

1000

tt

Input transition (rise and fall) time

VCC = 4.5 V

0

500

ns

tt

Input transition (rise and fall) time

VCC = 6 V

0

400

ns

TA

Operating free-air temperature

Q-suffix device

−40

125

°C

TA

Operating free-air temperature

M-suffix device

−55

125

°C