HD74LVC540A 查看數據表（PDF） - Renesas Electronics

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HD74LVC540A

Octal Buffers / Line Drivers with 3-state Outputs

Renesas Electronics 

HD74LVC540A

Switching Characteristics

Ta = –40 to 85°C

Item

Symbol VCC (V) Min

Typ

Max

Propagation delay time tPLH

2.7

—

—

7.5

tPHL

3.3±0.3 1.5

—

6.5

5.0±0.5 —

—

5.0

Output enable time

tZH

2.7

—

—

9.5

tZL

3.3±0.3 1.5

—

8.5

5.0±0.5 —

—

7.0

Output disable time

tHZ

2.7

—

—

8.5

tLZ

3.3±0.3 1.5

—

7.5

5.0±0.5 —

—

6.5

Between output

pins skew *1

tOSLH

2.7

—

—

—

tOSHL

3.3±0.3 —

—

1.0

5.0±0.5 —

—

1.0

Input capacitance

CIN

2.7

—

3.0

—

Output capacitance

CO

2.7

—

15.0

—

Note: 1. This parameter is characterized but not tested.

tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|

Unit

ns

ns

ns

ns

pF

pF

Test Circuit

VCC

VCC

G1

Input

Output

From

(Input)

A

To

(Output)

Y

G1 or G2 Y

G1 or G2 Y

Pulse generator

Zout = 50 Ω

A1 Y1

500 Ω S1

CL =

450 Ω

50 pF 50 Ω Scope

OPEN

*1 See under table

GND

Notes:

G2

Symbol

S1

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

tPLH / t PHL OPEN

OPEN

tZH/ t HZ

GND

GND

tZL / t LZ

6V

2×Vcc

1. CL includes probe and jig capacitance.

2. A2-Y2 to A8-Y8 are identical to above load circuit.

Rev.4.00 Jul. 28, 2004 page 4 of 6

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