74LV245PW datasheet(6/12 Pages) PHILIPS

부품명	74LV245PW

상세설명	Octal bus transceiver 3-State

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Philips Semiconductors

Product specification

74LV245

Octal bus transceiver (3-State)

1998 Apr 20

6

AC CHARACTERISTICS

GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ

CONDITION

LIMITS

SYMBOL

PARAMETER

WAVEFORM

CONDITION

–40 to +85

°C

–40 to +125

°C

UNIT

VCC(V)

MIN

TYP1

MAX

MIN

MAX

1.2

45

28

Propagation delay

2.0

15

28

34

tPHL/tPLH

Pro agation delay

An to Bn;

B tA

Figures 1

2.7

11

19

24

ns

Bn to An

3.0 to 3.6

92

16

20

4.5 to 5.5

83

11

14

1.2

55

3-State output enable time

2.0

19

31

39

tPZH/tPZL

3-State out ut enable time

OE to An;

OE tB

Figures 2

2.7

14

23

29

ns

OE to Bn

3.0 to 3.6

102

18

23

4.5 to 5.5

8.53

14

18

1.2

65

3-State output disable time

OE tA

2.0

24

32

39

tPHZ/tPLZ

OE to An;

OE to Bn

Figures 2

2.7

18

24

29

ns

OE to Bn

3.0 to 3.6

142

20

24

4.5 to 5.5

11.53

16

19

NOTES:

1. Unless otherwise stated, all typical values are measured at Tamb = 25°C

2. Typical values are measured at VCC = 3.3 V.

3. Typical values are measured at VCC = 5.0 V.

AC WAVEFORMS

VM = 1.5 V at VCC ≥ 2.7 V and ≤ 3.6 V

VM = 0.5 V × VCC at VCC < 2.7 V and ≥ 4.5 V

VOL and VOH are the typical output voltage drop that occur with the output load.

VX = VOL + 0.3 V at VCC ≥ 2.7 V and ≤ 3.6 V

VX = VOL + 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V

VY = VOH – 0.3 V at VCC ≥ 2.7V and ≤ 3.6 V

VY = VOH – 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V

SV00627

VM

An, Bn INPUT

Bn, An OUTPUT

VM

tPLH

tPHL

Figure 1. Input (An, Bn) to output

(Bn, An) propagation delays and the output transition times.

SV00628

outputs

disabled

outputs

enabled

outputs

enabled

tPHZ

tPZH

tPZL

tPLZ

VM

OE INPUT

HIGH-to-OFF

OFF-to-HIGH

LOW-to-OFF

OFF-to-LOW

VX

VY

GND

VCC

OUTPUT

VI

VOL

VOH

OUTPUT

GND

Figure 2. 3-State enable and disable times.

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