SN54AHC74, SN74AHC74

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SCLS255K – DECEMBER 1995 – REVISED DECEMBER 2013

Absolute Maximum Ratings

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

(1)

UNIT

–0.5 V to 7 V

–0.5 V to 7 V

–20 mA

±20 mA

±25 mA

±50 mA

D package

86°C/W

96°C/W

127°C/W

Package thermal impedance,

80°C/W

76°C/W

113°C/W

47°C/W

–65°C to 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)

The package thermal impedance is calculated in accordance with JESD 51-5.

Recommended Operating Conditions

(1)

SN54AHC74

SN74AHC74

UNIT

MIN

MAX

MIN

MAX

Supply voltage

2

5.5

2

5.5

V

1.5

1.5

High-level input voltage

2.1

2.1

V

3.85

3.85

0.5

0.5

Low-level input voltage

0.9

0.9

V

1.65

1.65

Input voltage

0

5.5

0

5.5

V

Output voltage

0

0

V

–50

–50

µA

High-level output current

–4

–4

mA

–8

–8

50

50

µA

Low-level output current

4

4

mA

8

8

100

100

Δt/Δv

Input transition rise or fall rate

ns/V

20

20

Operating free-air temperature

–55

125

–40

125

°C

(1)

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

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