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2OE

1

2

4

6

8

12

14

16

18

1A1

1A2

1A3

1A4

1Y1

1Y2

1Y3

1Y4

1OE

19

11

13

15

17

3

5

7

9

2A1

2A2

2A3

2A4

2Y1

2Y2

2Y3

2Y4

Absolute Maximum Ratings

(1)

Recommended Operating Conditions

(1)

SN74ACT244-EP

OCTAL BUFFER/DRIVER

WITH 3-STATE OUTPUTS

SCAS724B – OCTOBER 2003 – REVISED MARCH 2006

LOGIC DIAGRAM (POSITIVE LOGIC)

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

VCC

Supply voltage range

–0.5

7

V

VI

Input voltage range(2)

–0.5

VCC + 0.5

V

VO

Output voltage range(2)

–0.5

VCC + 0.5

V

IIK

Input clamp current

VI < 0 or VI > VCC

±20

mA

IOK

Output clamp current

VO < 0 or VO > VCC

±20

mA

IO

Continuous output current

VO = 0 to VCC

±50

mA

Continuous current through VCC or GND

±200

mA

DW package

58

θ

JA

Package thermal impedance(3)

°C/W

NS package

60

Tstg

Storage temperature range(4)

–65

150

°C

(1)

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.

(2)

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

(3)

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

(4)

Long-term high-temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of

overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging.

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VI

Input voltage

0

VCC

V

VO

Output voltage

0

VCC

V

IOH

High-level output current

–24

mA

IOL

Low-level output current

24

mA

∆t/∆v

Input transition rise or fall rate

8

ns/V

SN74ACT244M-EP

–55

125

TA

Operating free-air temperature

°C

SN74ACT244I-EP

–40

85

(1)

All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

2

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