Diodes 74HCT138 Manuel d'utilisateur télécharger pdf

74HCT138

Document number: DS35489 Rev. 3 - 2

1 of 10

www.diodes.com

June 2013

74HCT138

3 TO 8 LINE DECODER DEMULTIPLEXER

Description

The 74HCT138 is a high speed CMOS device that is designed to be

pin compatable with 74LS low power Schottky types.

The device accepts a three bit binary weighted address on input pins

A0, A1 and A2 and when enabled will produce one active low output

with the remaing seven being high.

There are two active LOW enable inputs E

1 and E2, and one active

HIGH enable input E3. The disabled device state results in all outputs

being high. The enable state occurs with E

1 and E2 asserted low and

E3 asserted high.

The multiple enable lines allow for the parallel expansion of decoders

to create 4-to-16 line versions with no additional parts and 5-to-32

versions with the addition of a single inverter.

Features

• Wide Supply Voltage Range from 4.5V to 5.5V

• Sinks or sources 8mA at V

= 4.5V

• CMOS low power consumption

• Schmitt Trigger Action at All Inputs

• Inputs accept up to 6.0V

• ESD Protection Tested per JESD 22

 Exceeds 200-V Machine Model (A115-A)

 Exceeds 2000-V Human Body Model (A114-A)

 Exceeds 1000-V Charged Device Model (C101C)

• Latch-Up Exceeds 250mA per JESD 78, Class II

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

Applications

• Memory chip select decoding

• Demultiplexing

• Single line peripheral control

• Allow simple serial bit streams from a microcontroller to control as

many peripheral lines as needed.

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Click here for ordering information, located at the end of datasheet

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

Page 1 - 74HCT138

74HCT138 Document number: DS35489 Rev. 3 - 2 1 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT1383 TO 8 LINE DECODER DEMULTIPLEXER Descr

Page 2 - Function Table Diagram

74HCT138 Document number: DS35489 Rev. 3 - 2 10 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 IMPORTANT NOTICE DIODES INCORPORATED

Page 3 - Logic Diagram

74HCT138 Document number: DS35489 Rev. 3 - 2 2 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Pin Descriptions Pin Number Pin Name

Page 4

74HCT138 Document number: DS35489 Rev. 3 - 2 3 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Logic Diagram

Page 5 - Switching Characteristics

74HCT138 Document number: DS35489 Rev. 3 - 2 4 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Absolute Maximum Ratings (Note 4) (@TA

74HCT138 Document number: DS35489 Rev. 3 - 2 5 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Electrical Characteristics (@TA = +25°

Page 7 - (1) SO-16, TSSOP-16

74HCT138 Document number: DS35489 Rev. 3 - 2 6 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Operating Characteristics (@TA = +25°C

Page 8 - Package Type: TSSOP-16

74HCT138 Document number: DS35489 Rev. 3 - 2 7 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Ordering Information Device Pa

Page 9

74HCT138 Document number: DS35489 Rev. 3 - 2 8 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Package Outline Dimensions (All dimen

Page 10

74HCT138 Document number: DS35489 Rev. 3 - 2 9 of 10 www.diodes.com June 2013© Diodes Incorporated 74HCT138 Suggested Pad Layout Please see AP020

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