SN54AHC573, SN74AHC573

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SCLS242L – OCTOBER 1995 – REVISED SEPTEMBER 2014

7.3 Recommended Operating Conditions

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

(1)

SN54AHC573

SN74AHC573

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

∆t/∆v

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 (SCBA004).

7.4 Thermal Information

SN74AHC573

DW

DB

DGV

N

NS

PW

UNIT

20 PINS

Junction-to-ambient thermal resistance

79.4

97.9

117.2

53.3

79.2

103.3

Junction-to-case (top) thermal resistance

45.7

59.6

32.7

40.0

45.7

37.8

Junction-to-board thermal resistance

46.9

53.1

58.7

34.2

46.8

54.3

°C/W

Junction-to-top characterization parameter

18.7

21.3

1.15

26.4

19.3

2.9

Junction-to-board characterization parameter

46.5

52.7

58.0

34.1

46.4

53.8

Junction-to-case (bottom) thermal resistance

n/a

n/a

n/a

n/a

n/a

n/a

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).

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