74AHCT139D datasheet(10/16 Pages) PHILIPS

Part #	74AHCT139D

Description	Dual 2-to-4 line decoder/demultiplexer

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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10 / 16 page

1999 Sep 01

10

Philips Semiconductors

Product speciﬁcation

Dual 2-to-4 line decoder/demultiplexer

74AHC139;

74AHCT139

AC WAVEFORMS

Fig.5

The address input (nAn) to output (nYn)

propagation delays.

FAMILY

VI INPUT

REQUIREMENTS

VM

INPUT

VM

OUTPUT

AHC

GND to VCC

50% VCC 50% VCC

AHCT

GND to 3.0 V

1.5 V

50% VCC

handbook, halfpage

MNA469

tPHL

VI

GND

VOH

VOL

tPLH

VM

(1)

VM

(1)

nAn INPUT

nYn OUTPUT

Fig.6

The enable input (nE) to output (nYn)

propagation delays.

FAMILY

VI INPUT

REQUIREMENTS

VM

INPUT

VM

OUTPUT

AHC

GND to VCC

50% VCC 50% VCC

AHCT

GND to 3.0 V

1.5 V

50% VCC

handbook, halfpage

MNA470

tPHL

VI

GND

VOH

VOL

tPLH

VM

(1)

VM

(1)

nE INPUT

nYn OUTPUT

Fig.7 Load circuitry for switching times.

handbook, full pagewidth

open

GND

VCC

VI

VO

MNA219

D.U.T.

CL

RT

1000

Ω

PULSE

GENERATOR

S1

TEST

S1

tPLH/tPHL

open

tPLZ/tPZL

VCC

tPHZ/tPZH

GND

Definitions for test circuit:

CL = Load capacitance including jig and probe capacitance.

(See Chapter “AC characteristics” for values).

RT = Termination resistance should be equal to the output

impedance Zo of the pulse generator.

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74AHCT139D Datasheet(PDF) 10 Page - NXP Semiconductors

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