74LVC138ADB datasheet(6/10 Pages) PHILIPS

部件名	74LVC138ADB

功能描述	3-to-8 line decoder/demultiplexer; inverting

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制造商	PHILIPS [NXP Semiconductors]

网页	http://www.nxp.com

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Philips Semiconductors

Product specification

74LVC138A

3-to-8 line decoder/demultiplexer; inverting

1998 Apr 28

6

AC WAVEFORMS

VM = 1.5 V at VCC w 2.7 V

VM = 0.5 S VCC at VCC < 2.7 V

VOL and VOH are the typical output voltage drop that occur with the

output load.

SV00557

V M

A n, E 3

INPUT

VCC

GND

VOL

VOH

Yn OUTPUT

V M

t PLH

t PHL

Figure 1.

Input (nA) to output (nY) propagation delays.

SV00558

V M

E 1, E 2

INPUT

Y n OUTPUT

V M

tPLH

tPHL

V CC

GND

V OL

V OH

Figure 2.

3-State enable and disable times.

TEST CIRCUIT

SWITCH POSITION

PULSE

GENERATOR

RT

VI

D.U.T.

VO

CL

VCC

500

Ω

Open

GND

S1

VCC

VI

< 2.7V

VCC

TEST

S1

tPLH/tPHL

Open

2.7V

2.7–3.6V

50pF

500

Ω

2 * VCC

SV00903

Figure 3.

Load circuitry for switching times.

类似零件编号 - 74LVC138ADB

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类似说明 - 74LVC138ADB

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