SN74LS748 查看數據表（PDF） - Motorola => Freescale

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产品描述 (功能)

生产厂家

SN74LS748

10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS LOW POWER SCHOTTKY

Motorola => Freescale 

SN54/74LS147 • SN54/74LS148 • SN54/74LS748

AC CHARACTERISTICS (VCC = 5.0 V, TA = 25°C)

SN54 / 74LS147

Symbol

tPLH

tPHL

tPLH

tPHL

From

(Input)

Any

Any

To

(Output)

Any

Any

Waveform

In-phase

output

Out-of-phase

output

SN54 / 74LS148

SN54 / 74LS748

Symbol

tPLH

tPHL

tPLH

tPHL

tPLH

tPHL

tPLH

tPHL

tPLH

tPHL

tPLH

tPHL

tPLH

tPHL

From

(Input)

1 thru 7

1 thru 7

0 thru 7

0 thru 7

EI

EI

EI

To

(Output)

A0, A1, or A2

Waveform

In-phase

output

Out-of-phase

A0, A1, or A2

output

Out-of-phase

EO

output

In-phase

GS

output

A0, A1, or A2

In-phase

output

In-phase

GS

output

EO

In-phase

output

Limits

Min Typ Max

12

18

12

18

21

33

15

23

Limits

Min Typ Max

14

18

15

25

20

36

16

29

7.0

18

25

40

35

55

9.0

21

16

25

12

25

12

17

14

36

12

21

28

40

30

45

Unit

Test Conditions

ns

CL = 15 pF,

RL = 2.0 kΩ

ns

Unit

Test Conditions

ns

ns

ns

CL = 15 pF,

ns

RL = 2.0 kΩ

ns

ns

ns (LS148)

(LS748)

FAST AND LS TTL DATA

5-249

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