SN74AHC245-EP datasheet(5/32 Pages) TI1

部件名	SN74AHC245-EP

功能描述	SNx4AHC245 Octal Bus Transceivers With 3-State Outputs

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制造商	TI1 [Texas Instruments]

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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

VCC

Supply voltage

2

5.5

2

5.5

V

VCC = 2 V

1.5

VIH

High-level input voltage

VCC = 3 V

2.1

V

VCC = 5.5 V

3.85

VCC = 2 V

0.5

VIL

Low-level input voltage

VCC = 3 V

0.9

V

VCC = 5.5 V

1.65

VI

Input voltage

OE or DIR

0

5.5

0

5.5

V

VO

Output voltage

A or B

0

VCC

0

VCC

V

VCC = 2 V

–50

µA

IOH

High-level output current

VCC = 3.3 V ± 0.3 V

–4

mA

VCC = 5 V ± 0.5 V

–8

VCC = 2 V

50

µA

IOL

Low-level output current

VCC = 3.3 V ± 0.3 V

4

mA

VCC = 5 V ± 0.5 V

8

VCC = 3.3 V ± 0.3 V

100

∆t/∆v

Input transition rise or fall rate

ns/V

VCC = 5 V ± 0.5 V

20

TA

Operating free-air temperature

–55

125

–40

125

°C

(1)

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 (SCBA004).

7.4 Thermal Information

DB

DGV

DW

N

NS

PW

RGY

THERMAL METRIC(1)

UNIT

20 PINS

RθJA

Junction-to-ambient thermal resistance

96.0

116.1

79.8

51.5

77.1

102.8

35.1

RθJC(top)

Junction-to-case (top) thermal resistance

57.7

31.3

45.8

38.2

43.6

36.8

43.3

RθJB

Junction-to-board thermal resistance

51.2

57.6

47.4

32.4

44.6

53.8

12.9

ψJT

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

ψJB

50.8

56.9

47.0

32.3

44.2

53.3

12.9

parameter

Junction-to-case (bottom) thermal

RθJC(bot)

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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Product Folder Links: SN54AHC245 SN74AHC245

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