SN74HC27DBR datasheet(2/18 Pages) TI1

部件名	SN74HC27DBR

功能描述	TRIPLE 3-INPUT POSITIVE-NOR GATES

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制造商	TI1 [Texas Instruments]

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SN54HC27, SN74HC27

TRIPLE 3-INPUT POSITIVE-NOR GATES

SCLS088D – DECEMBER 1982 – REVISED AUGUST 2003

2

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

logic diagram (positive logic)

A

C

Y

B

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)

±25 mA

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

Continuous current through VCC or GND

±50 mA

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

Package thermal impedance,

θJA (see Note 2): D package

86

°C/W

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

DB package

96

°C/W

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

N package

80

°C/W

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

NS package

76

°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)

SN54HC27

SN74HC27

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

2

5

6

2

5

6

V

High-level input voltage

VCC = 2 V

1.5

V

VIH

High-level input voltage

VCC = 4.5 V

3.15

V

IH

VCC = 6 V

4.2

V

Low-level input voltage

VCC = 2 V

0.5

V

VIL

Low-level input voltage

VCC = 4.5 V

1.35

V

IL

VCC = 6 V

1.8

VI

Input voltage

0

VCC

0

VCC

V

VO

Output voltage

0

VCC

0

VCC

V

t/ v

Input transition rise/fall time

VCC = 2 V

1000

ns

∆t/∆v

Input transition rise/fall time

VCC = 4.5 V

500

ns

VCC = 6 V

400

TA

Operating free-air temperature

–55

125

–40

85

°C

NOTE 3: 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.

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