SN74ACT244 datasheet(2/5 Pages) TI

2 / 5 page

SN54ACT244, SN74ACT244

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCAS517B – JUNE 1995 – REVISED MAY 1996

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

logic symbol†

1A1

1A2

1A3

1A4

1Y1

1Y2

1Y3

1Y4

2A1

2A2

2A3

2A4

2Y1

2Y2

2Y3

2Y4

1OE

2OE

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

logic diagram (positive logic)

2OE

1A1

1A2

1A3

1A4

1Y1

1Y2

1Y3

1Y4

1OE

2A1

2A2

2A3

2A4

2Y1

2Y2

2Y3

2Y4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡

Supply voltage range, VCC

–0.5 V to 7 V

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

Input voltage range, VI (see Note 1)

–0.5 V to VCC + 0.5 V

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

Output voltage range, VO (see Note 1)

–0.5 V to VCC + 0.5 V

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

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

±20 mA

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

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

±20 mA

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

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

±50 mA

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

Continuous current through VCC or GND

±200 mA

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

Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DB package

0.6 W

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

DW package

1.6 W

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

N package

1.3 W

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

PW package

0.7 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 maximum package power dissipation is calculated using a junction temperature of 150

°C and a board trace length of 750 mils,

except for the N package, which has a trace length of zero.

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