SN54AHC245, SN74AHC245

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SCLS230J – OCTOBER 1995 – REVISED JULY 2014

7.3 Recommended Operating Conditions

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

(1)

SN54AHC245

SN74AHC245

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

OE or DIR

0

5.5

0

5.5

V

Output voltage

A or B

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

DB

DGV

DW

N

NS

PW

RGY

UNIT

20 PINS

Junction-to-ambient thermal resistance

96.0

116.1

79.8

51.5

77.1

102.8

35.1

Junction-to-case (top) thermal resistance

57.7

31.3

45.8

38.2

43.6

36.8

43.3

Junction-to-board thermal resistance

51.2

57.6

47.4

32.4

44.6

53.8

12.9

Junction-to-top characterization parameter

19.4

1.0

18.5

24.6

17.2

2.5

0.9

°C/W

Junction-to-board characterization

50.8

56.9

47.0

32.3

44.2

53.3

12.9

parameter

Junction-to-case (bottom) thermal

n/a

n/a

n/a

n/a

n/a

n/a

7.9

resistance

(1)

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

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