N74F240DB datasheet(7/12 Pages) PHILIPS

Part #	N74F240DB

Description	Octal inverter buffer 3-State

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product specification

74F240/74F240A/

74F241/74F241A

Buffers

January 2, 1991

7

AC ELECTRICAL CHARACTERISTICS

LIMITS

Tamb = +25°C

Tamb = 0°C to +70°C

SYMBOL

PARAMETER

TEST

VCC = +5.0V

VCC = +5.0V ± 10%

UNIT

CONDITION

CL = 50pF, RL = 500Ω

MIN

TYP

MAX

MIN

MAX

tPLH

tPHL

Propagation delay

Ian, Ibn to Yn

Waveform 1

3.0

2.0

4.5

3.0

6.5

4.5

3.0

2.0

7.5

5.0

ns

tPZH

tPZL

Output enable time

to high or low level

74F240

Waveform 3

Waveform 4

3.0

4.5

5.0

6.5

7.5

8.5

3.0

4.0

9.0

10.0

ns

tPHZ

tPLZ

Output disable time

from high or low level

Waveform 3

Waveform 4

3.0

5.5

5.0

7.0

3.0

7.5

ns

tPLH

tPHL

Propagation delay

Ian, Ibn to Yn

Waveform 1

2.5

2.0

4.0

3.5

5.5

2.0

6.5

6.0

ns

tPZH

tPZL

Output enable time

to high or low level

74F240A

Waveform 3

Waveform 4

2.0

3.5

4.0

5.0

6.5

7.5

2.0

3.0

7.0

8.5

ns

tPHZ

tPLZ

Output disable time

from high or low level

Waveform 3

Waveform 4

2.0

1.5

3.5

2.5

6.0

5.0

1.5

1.0

6.5

5.5

ns

tsk(0)

Output skew1, 2

Waveform 5

1.5

2.0

ns

tPLH

tPHL

Propagation delay

Ian, Ibn to Yn

Waveform 2

2.5

4.0

5.2

2.5

6.2

6.5

ns

tPZH

tPZL

Output enable time

to high or low level

74F241

Waveform 3

Waveform 4

2.0

4.0

5.0

5.7

7.0

2.0

6.7

8.0

ns

tPHZ

tPLZ

Output disable time

from high or low level

Waveform 3

Waveform 4

2.0

4.0

6.0

2.0

7.0

ns

tPLH

tPHL

Propagation delay

Ian, Ibn to Yn

Waveform 2

2.5

4.5

5.8

2.5

6.5

ns

tPZH

tPZL

Output enable time

to high or low level

74F241A

Waveform 3

Waveform 4

2.5

3.5

4.5

5.0

6.0

7.0

2.0

3.0

6.7

8.0

ns

tPHZ

tPLZ

Output disable time

from high or low level

Waveform 3

Waveform 4

2.0

1.5

4.0

3.5

6.0

5.5

1.5

1.0

6.5

6.0

ns

tsk(0)

Output skew1, 2

Waveform 5

1.5

2.0

ns

Notes to AC electrical characteristics

1. | tPN actual – tPM actual| for any output compared to any other output where N and M are either LH or HL.

2. Skew times are valid only under same test conditions (temperature, VCC, loading, etc.,).

AC WAVEFORMS

Ian, Ibn

VM

tPLH

tPHL

Yn

SF00328

Waveform 1. Propagation delay for inverting outputs

Ian, Ibn

VM

tPHL

tPLH

Yn

SF00329

Waveform 2. Propagation delay for non–invertIng outputs

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