SN74LS147D datasheet(10/22 Pages) TI

Part #	SN74LS147D

Description	10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS

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Manufacturer	TI [Texas Instruments]

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SN54147, SN54148, SN54LS147, SN54LS148

SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148

10LINE TO 4LINE AND 8LINE TO 3LINE PRIORITY ENCODERS

SDLS053B − OCTOBER 1976 − REVISED MAY 2004

10

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

SN54LS147, SN74LS147 switching characteristics, VCC = 5 V, TA = 255C (see Figure 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

WAVEFORM

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Any

In-phase output

12

18

ns

tPHL

Any

In-phase output

CL = 15 pF,

12

18

ns

tPLH

Any

Out-of-phase output

CL = 15 pF,

RL = 2 kΩ

21

33

ns

tPHL

Any

Out-of-phase output

RL = 2 k

15

23

ns

SN54LS148, SN74LS148 switching characteristics, VCC = 5 V, TA = 255C (see Figure 2)

PARAMETER†

FROM

(INPUT)

TO

(OUTPUT)

WAVEFORM

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

1–7

A0, A1, or A2

In-phase output

14

18

ns

tPHL

1–7

A0, A1, or A2

In-phase output

15

25

ns

tPLH

1–7

A0, A1, or A2

Out-of-phase output

20

36

ns

tPHL

1–7

A0, A1, or A2

Out-of-phase output

16

29

ns

tPLH

0–7

EO

Out-of-phase output

7

18

ns

tPHL

0–7

EO

Out-of-phase output

25

40

ns

tPLH

0–7

GS

In-phase output

CL = 15 pF,

35

55

ns

tPHL

0–7

GS

In-phase output

CL = 15 pF,

RL = 2 kΩ

9

21

ns

tPLH

EI

A0, A1, or A2

In-phase output

RL = 2 k

16

25

ns

tPHL

EI

A0, A1, or A2

In-phase output

12

25

ns

tPLH

EI

GS

In-phase output

12

17

ns

tPHL

EI

GS

In-phase output

14

36

ns

tPLH

EI

EO

In-phase output

12

21

ns

tPHL

EI

EO

In-phase output

23

35

ns

† tPLH = propagation delay time, low-to-high-level output

tPHL = propagation delay time, high-to-low-level output

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SN74LS147D Datasheet(PDF) 10 Page - Texas Instruments

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