HD74LVC240A 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD74LVC240A

Octal Buffers / Line Drivers with 3-state Outputs

Hitachi -> Renesas Electronics 

HD74LVC240A

Switching Characteristics

Ta = –40 to 85°C

Item

Propagation delay time

Symbol VCC (V)

t PLH

2.7

t PHL

3.3±0.3

5.0±0.5

Min Typ Max Unit

— — 7.5 ns

1.5 — 6.5 ns

— — 5.0 ns

Output enable time

t ZH

2.7

— — 9.0 ns

t ZL

3.3±0.3 1.5 — 8.0 ns

5.0±0.5 — — 6.5 ns

Output disable time

t HZ

t LZ

Between outut pins skew *1 tOSLH

t OSHL

2.7

3.3±0.3

5.0±0.5

2.7

3.3±0.3

5.0±0.5

——

1.5 —

——

——

——

——

8.0 ns

7.0 ns

6.0 ns

— ns

1.0 ns

1.0 ns

Input capacitance

CIN

2.7

— 3.0 — pF

Output capacitance

CO

2.7

— 15.0 — pF

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

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

From (Input) To (Output)

A

Y

G

Y

G

Y

Test Circuit

VCC

VCC

Input

Pulse generator

Zout = 50 Ω

1G, 2G

Output

1Y1 to 2Y4

1A1 to 2A4

CL =

50 pF

500 Ω S1

450 Ω

50 Ω Scope

OPEN

*1 See under table

GND

Note:

1. CL includes probe and jig capacitance.

Symbol

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

S1

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

OPEN OPEN

GND

GND

6V

2×Vcc

5

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