HD74HC253 Просмотр технического описания (PDF) - Renesas Electronics

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HD74HC253

Dual 4-to-1-line Data Selectors/Multiplexers (with 3-state outputs)

Renesas Electronics 

HD74HC253

Switching Characteristics

Item

Symbol VCC (V)

Propagation delay tPLH

2.0

time

tPHL

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

Output enable time tZH

2.0

tZL

4.5

6.0

Output disable

time

tHZ

2.0

tLZ

4.5

6.0

Output rise/fall

time

tTLH

2.0

tTHL

4.5

6.0

Input capacitance Cin

—

Ta = 25°C

Min Typ Max

— — 125

— 18 25

— — 21

— — 160

— 20 32

— — 27

— — 100

— 11 20

— — 17

— — 150

— 15 30

— — 26

— — 75

— 5 15

— — 13

— 5 10

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

Ta = –40 to +85°C

Unit

Min

Max

Test Conditions

—

155 ns Data to Y

—

31

—

26

—

200 ns Select to Y

—

40

—

34

—

125 ns

—

25

—

21

—

190 ns

—

38

—

33

—

95

ns

—

19

—

16

—

10 pF

Test Circuit

VCC

Input

Pulse Generator

Zout = 50 Ω

VCC

Output

1G

1Y

1C0 to 1C3

A

B

2C0 to 2C3

2G

2Y

Output

1 k Ω S1

CL =

50 pF

1 k Ω S1

CL =

50 pF

Note : 1. CL includes probe and jig capacitance.

OPEN

GND

VCC

OPEN

GND

VCC

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

S1

OPEN

GND

VCC

Rev.2.00 Jan 31, 2006 page 4 of 6

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