HD74HC540TELL 查看數據表（PDF） - Renesas Electronics

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HD74HC540TELL

Octal Buffers/Line Drivers (with 3-state outputs)

Renesas Electronics 

HD74HC540, HD74HC541

Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Item

Propagation delay

time

Output enable

time

Output disable

time

Output rise/fall

time

Input capacitance

Symbol VCC (V)

tPLH

2.0

tPHL

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

tZH

2.0

tZL

4.5

6.0

tHZ

2.0

tLZ

4.5

6.0

tTLH

2.0

tTHL

4.5

6.0

Cin

—

Ta = 25°C

Min Typ Max

— — 100

— 11 20

— — 17

— — 115

— 12 23

— — 20

— — 150

— 14 30

— — 26

— — 150

— 16 30

— — 26

— — 60

— 4 12

— — 10

— 5 10

Ta = –40 to +85°C

Min

Max Unit

Test Conditions

—

125 ns (HD74HC540 only)

—

25

—

21

—

145 ns (HD74HC541 only)

—

29

—

25

—

190 ns

—

38

—

33

—

190 ns

—

38

—

33

—

75

ns

—

15

—

13

—

10

pF

Test Circuit

VCC

VCC

Input

Pulse Generator

Zout = 50 Ω

G1, G2

Output

Y1 to Y8

A1 to A8

1 k Ω S1

CL =

50 pF

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

OPEN

GND

VCC

S1

OPEN

GND

VCC

Note : 1. CL includes probe and jig capacitance.

Rev.2.00 Mar 30, 2006 page 4 of 8

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