HD74LS251P 데이터 시트보기 (PDF) - Renesas Electronics

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HD74LS251P

1 of 8 Data Selector / Multiplexer (with strobe and three-state outputs)

Renesas Electronics 

HD74LS251

Recommended Operating Conditions

Item

Supply voltage

Output current

Operating temperature

Symbol

VCC

IOH

IOL

Topr

Min

4.75

—

—

–20

Typ

5.00

—

—

25

Max

5.25

–2.6

8

75

Unit

V

mA

mA

°C

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.* max.

Unit

Condition

Input voltage

Output voltage

Input current

Output current

Short-circuit output

current

VIH

2.0

—

—

V

VIL

—

—

0.8

V

VOH

2.4

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –2.6 mA

VOL

—

—

0.4

V

IOL = 4 mA VCC = 4.75 V, VIH = 2 V,

—

—

0.5

IOL = 8 mA VIL = 0.8 V

IIH

—

—

20

µA VCC = 5.25 V, VI = 2.7 V

IIL

—

—

–0.4

mA VCC = 5.25 V, VI = 0.4 V

II

—

—

0.1

mA VCC = 5.25 V, VI = 7 V

IOZ

—

—

—

—

20

–20

µA

VO = 2.7 V

VO = 0.4 V

VCC = 5.25 V, VIH = 2 V

IOS

–30

—

–130

mA VCC = 5.25 V

Supply current**

—

6.1

10

Condition A

ICC

—

7.1

12

mA

Condition B VCC = 5.25 V

Input clamp voltage

VIK

—

—

–1.5

V

VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** ICC is measured with the outputs open and all data and select inputs at 4.5 V under the following conditions.

A; Strobe grounded, B; Strove at 4.5 V

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs Outputs min.

typ.

max.

Unit

Condition

tPLH

A, B, C

Y

tPHL

(4 level)

—

29

45

—

28

45

tPLH

A, B, C

W

Propagation delay time

tPHL

(3 level)

tPLH

Data

Y

tPHL

tPLH

Data

W

tPHL

—

20

33

—

21

33

ns

—

17

28

—

18

28

—

10

15

CL = 15 pF,

RL = 2 kΩ

—

9

15

Output enable time

tZH

Strobe

Y

tZL

tZH

Strobe

W

tZL

—

30

45

—

26

40

ns

—

17

27

—

24

40

Output disable time

tHZ

Strobe

Y

tLZ

tHZ

Strobe

W

tLZ

—

30

45

—

—

15

37

25

55

ns

CL = 5 pF,

RL = 2 kΩ

—

15

25

Rev.3.00, Jul.15.2005, page 3 of 5

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