HD74HC257P データシートの表示（PDF） - Renesas Electronics

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HD74HC257P

Quad. 2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs)

Renesas Electronics 

HD74HC257

Switching Characteristics

Item

Symbol VCC (V)

Propagation delay tPHL

2.0

time

4.5

6.0

tPLH

2.0

4.5

6.0

tPHL

2.0

4.5

6.0

tPLH

2.0

4.5

6.0

Output enable time tZL

2.0

4.5

6.0

tZH

2.0

4.5

6.0

Output disable

time

tLZ

2.0

4.5

6.0

tHZ

2.0

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

— — 115

— 11 23

— — 20

— — 115

— 10 23

— — 20

— — 115

— 14 23

— — 20

— — 115

— 14 23

— — 20

— — 150

— 11 30

— — 26

— — 150

— 13 30

— — 26

— — 150

— 14 30

— — 26

— — 150

— 18 30

— — 26

— — 60

— 4 12

— — 10

— 5 10

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

Ta = –40 to +85°C

Unit

Min

Max

Test Conditions

—

145 ns Data to Y

—

29

—

25

—

145 ns

—

29

—

25

—

145 ns Select to Y

—

29

—

25

—

145 ns

—

29

—

25

—

190 ns Output control to Y

—

38

—

33

—

190 ns

—

38

—

33

—

190 ns Output control to Y

—

38

—

33

—

190 ns

—

38

—

33

—

75

ns

—

15

—

13

—

10 pF

Test Circuit

VCC

VCC

Output

Input

Pulse Generator

Zout = 50 Ω

OC

1Y

1A to 4A

Output

2Y

Output

1B to 4B

3Y

Output

1 k Ω S1

CL = 50 pF

OPEN

GND

VCC

Same as Load Circuit

Same as Load Circuit

S

4Y

Same as Load Circuit

Note : 1. CL includes probe and jig capacitance.

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

S1

OPEN

GND

VCC

Rev.2.00 Jan 31, 2006 page 4 of 7

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