74HCT138DB,112
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NXP Semiconductors 74HCT138DB,112

Manufacturer No:
74HCT138DB,112
Manufacturer:
NXP Semiconductors
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Description:
NEXPERIA 74HCT138DB - DECODER/DR
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Product Introduction

Overview

The 74HCT138DB,112 is a 3-to-8 line decoder/demultiplexer integrated circuit produced by NXP Semiconductors. This device is part of the 74HCT family, which is known for its compatibility with TTL (Transistor-Transistor Logic) input levels. The 74HCT138DB decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7), making it versatile for various digital logic applications. Although this specific part number is discontinued, it remains relevant for existing designs and educational purposes.

Key Specifications

SpecificationValue
Package Type16-SSOP (0.209", 5.30mm Width)
Supply Voltage Range2.0 to 6.0 V
Input LevelsTTL level
Enable InputsThree enable inputs (E1, E2, and E3)
Output TypeActive LOW, mutually exclusive outputs
Operating Temperature Range-40 °C to +85 °C and -40 °C to +125 °C
ESD ProtectionHBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
ComplianceComplies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V)

Key Features

  • Wide supply voltage range from 2.0 to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Active LOW mutually exclusive outputs
  • Inputs include clamp diodes for interfacing to voltages in excess of VCC

Applications

The 74HCT138DB,112 is suitable for a variety of digital logic applications, including:

  • Memory chip select decoding
  • Demultiplexing operations
  • Parallel expansion to larger decoders (e.g., 1-of-32 lines with four '138 ICs and one inverter)
  • General digital logic circuits requiring decoding or demultiplexing functions

Q & A

  1. What is the primary function of the 74HCT138DB,112?
    The primary function is to decode three binary weighted address inputs to eight mutually exclusive outputs, and it can also be used as a demultiplexer.
  2. What is the supply voltage range for this IC?
    The supply voltage range is from 2.0 to 6.0 V.
  3. What type of input levels does the 74HCT138DB,112 support?
    The 74HCT138DB,112 supports TTL (Transistor-Transistor Logic) input levels.
  4. How many enable inputs does the 74HCT138DB,112 have?
    The device has three enable inputs (E1, E2, and E3).
  5. What is the operating temperature range for this IC?
    The operating temperature range is from -40 °C to +85 °C and from -40 °C to +125 °C.
  6. Is the 74HCT138DB,112 still in production?
    No, this specific part number has been discontinued.
  7. What are the ESD protection levels for this IC?
    The ESD protection levels are HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, and CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
  8. What package type is the 74HCT138DB,112 available in?
    The IC is available in a 16-SSOP package.
  9. What are some common applications for the 74HCT138DB,112?
    Common applications include memory chip select decoding, demultiplexing operations, and general digital logic circuits.
  10. Does the 74HCT138DB,112 comply with any specific standards?
    Yes, it complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).

Product Attributes

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Circuit:- 
Independent Circuits:- 
Current - Output High, Low:- 
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Similar Products

Part Number 74HCT138DB,112 74HCT139DB,112 74HCT238DB,112 74HCT138DB,118
Manufacturer NXP Semiconductors NXP USA Inc. Nexperia USA Inc. Nexperia USA Inc.
Product Status Active Active Obsolete Obsolete
Type - Decoder/Demultiplexer Decoder/Demultiplexer Decoder/Demultiplexer
Circuit - 1 x 2:4 1 x 3:8 1 x 3:8
Independent Circuits - 2 1 1
Current - Output High, Low - 4mA, 4mA - 4mA, 4mA
Voltage Supply Source - Single Supply Single Supply Single Supply
Voltage - Supply - 4.5V ~ 5.5V 4.5V ~ 5.5V 4.5V ~ 5.5V
Operating Temperature - -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 125°C
Mounting Type - Surface Mount Surface Mount Surface Mount
Package / Case - 16-SSOP (0.209", 5.30mm Width) 16-SSOP (0.209", 5.30mm Width) 16-SSOP (0.209", 5.30mm Width)
Supplier Device Package - 16-SSOP 16-SSOP 16-SSOP

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