HC645 datasheet(2/12 Pages) TI

2 / 12 page

SN54HC645, SN74HC645

OCTAL BUS TRANSCEIVERS

WITH 3STATE OUTPUTS

SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

logic diagram (positive logic)

DIR

To Seven Other Transceivers

218

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

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

°C/W

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

N package

°C/W

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

NS package

°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 (see Note 3)

SN54HC645

SN74HC645

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

VCC = 2 V

1.5

VIH

High-level input voltage

VCC = 4.5 V

3.15

VIH

High level in ut voltage

VCC = 6 V

4.2

VCC = 2 V

0.5

VIL

Low-level input voltage

VCC = 4.5 V

1.35

VIL

Low level in ut voltage

VCC = 6 V

1.8

Input voltage

VCC

Output voltage

VCC

VCC = 2 V

1000

∆t/∆v

Input transition rise/fall time

VCC = 4.5 V

500

∆t/∆v

In ut transition rise/fall time

VCC = 6 V

400

Operating free-air temperature

–55

125

–40

°C

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