74AHCT139PWDH datasheet(2/16 Pages) PHILIPS

Part #	74AHCT139PWDH

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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1999 Sep 01

2

Philips Semiconductors

Product speciﬁcation

Dual 2-to-4 line decoder/demultiplexer

74AHC139;

74AHCT139

FEATURES

• ESD protection:

HBM EIA/JESD22-A114-A exceeds 2000 V

MM EIA/JESD22-A115-A exceeds 200 V

CDM EIA/JESD22-C101 exceeds 1000 V

• Balanced propagation delays

• All inputs have Schmitt trigger actions

• Inputs accept voltages higher than VCC

• For AHC only: operates with CMOS input levels

• For AHCT only: operates with TTL input levels

• Specified from −40 to +85 °C and −40 to +125 °C.

DESCRIPTION

The 74AHC/AHCT139 are high-speed Si-gate CMOS

devices and are pin compatible with low power Schottky

TTL (LSTTL). They are specified in compliance with

JEDEC standard no. 7A.

The 74AHC/AHCT139 are high-speed, dual 2-to-4 line

decoder/demultiplexers.

This device has two independent decoders, each

accepting two binary weighted inputs (nA0 and nA1) and

providing four mutually exclusive active LOW outputs

(nY0 to nY3). Each decoder has an active LOW enable

input (nE). When nE is HIGH, every output is forced HIGH.

The enable input can be used as the data input for a 1-to-4

demultiplexer application.

The ‘139’ is identical to the HEF4556 of the HE4000B

family.

QUICK REFERENCE DATA

Ground = 0 V; Tamb =25 °C; tr =tf ≤ 3.0 ns.

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW).

PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

∑ (CL × VCC2 × fo) = sum of outputs;

CL = output load capacitance in pF;

VCC = supply voltage in Volts.

2. The condition is VI = GND to VCC.

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

AHC

AHCT

tPHL/tPLH

propagation delay

CL = 15 pF; VCC =5V

nAn to nYn

3.9

4.7

ns

nEtonYn

3.4

3.6

ns

CI

input capacitance

VI =VCC or GND

3.0

pF

CO

output capacitance

4.0

pF

CPD

power dissipation capacitance

CL = 50 pF; f = 1 MHz;

notes 1 and 2

25.76

22.36

pF

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74AHCT139PWDH Datasheet(PDF) 2 Page - NXP Semiconductors

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