LS148 datasheet(10/24 Pages) TI

10 / 24 page

SN54147, SN54148, SN54LS147, SN54LS148

SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148

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

SDLS053B − OCTOBER 1976 − REVISED MAY 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

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

PARAMETER

FROM

(INPUT)

(OUTPUT)

WAVEFORM

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Any

In-phase output

tPHL

Any

In-phase output

CL = 15 pF,

tPLH

Any

Out-of-phase output

CL = 15 pF,

RL = 2 kΩ

tPHL

Any

Out-of-phase output

RL = 2 k

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

PARAMETER†

FROM

(INPUT)

(OUTPUT)

WAVEFORM

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

1–7

A0, A1, or A2

In-phase output

tPHL

1–7

A0, A1, or A2

In-phase output

tPLH

1–7

A0, A1, or A2

Out-of-phase output

tPHL

1–7

A0, A1, or A2

Out-of-phase output

tPLH

0–7

Out-of-phase output

tPHL

0–7

Out-of-phase output

tPLH

0–7

In-phase output

CL = 15 pF,

tPHL

0–7

In-phase output

CL = 15 pF,

RL = 2 kΩ

tPLH

A0, A1, or A2

In-phase output

RL = 2 k

tPHL

A0, A1, or A2

In-phase output

tPLH

In-phase output

tPHL

In-phase output

tPLH

In-phase output

tPHL

In-phase output

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

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

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