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74HC138D

3-to-8 decoder/demux, active-low outputs, 3 enables, SOIC-16, NXP 74HC138

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制造商零件：

74HC138D

包装：

SOIC-16 (9.9 x 3.9 x 1.5mm)

品牌：
产品类别：
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说明

产品概览

The NXP 74HC138D is a 3-to-8 line decoder/demultiplexer in SOIC-16 package. Operating from 2.0V to 6.0V, it takes a 3-bit binary input and activates one of eight mutually exclusive outputs. Multiple enable inputs facilitate cascading for larger decoding applications.

主要规格

Logic Type 3-to-8 Line Decoder/Demultiplexer
Inputs 3 address + 3 enable
Outputs 8 (active-low)
VCC Range 2.0V to 6.0V
传播延迟 15ns at 6V (typical)
Output Drive ±5.2mA at 6V
包装 SOIC-16 (D)
工作温度 -40°C to +125°C

特点

  • 3-to-8 line decoding
  • Active-low outputs
  • 3 enable inputs (2 active-low, 1 active-high)
  • Cascadable for larger decoder trees
  • 2.0V to 6.0V wide VCC range
  • SOIC-16 surface-mount package

应用

  • Memory address decoding
  • I/O port selection
  • Demultiplexing data to multiple outputs
  • Chip select generation
  • Display digit scanning

The NXP 74HC138D is a 3-to-8 line decoder/demultiplexer in SOIC-16 package. It takes a 3-bit binary address input and activates one of eight active-low outputs. The three enable inputs (two active-low, one active-high) facilitate cascading for larger decoding applications such as memory address decoding and I/O port selection.

The 74HC138D decodes a 3-bit binary address (A0, A1, A2) to one of eight active-low outputs (Y0-Y7). When the enable conditions are met (E1=L, E2=L, E3=H), the selected output goes low while all others remain high. If any enable condition is not met, all outputs are forced high. This allows easy cascading: two 74HC138 devices can form a 4-to-16 decoder, or three can form a 5-to-24 decoder by using the enable inputs as the higher-order address bits.

针脚 名称 类型 功能
1 A0 输入 Address input bit 0 (LSB)
2 A1 输入 Address input bit 1
3 A2 输入 Address input bit 2 (MSB)
4 E2 输入 Enable 2 (active-low)
5 E3 输入 Enable 3 (active-high)
6 E1 输入 Enable 1 (active-low)
7 Y7 输出 Decoded output 7
8 接地 电源 地面
9 Y6 输出 Decoded output 6
10 Y5 输出 Decoded output 5
11 Y4 输出 Decoded output 4
12 Y3 输出 Decoded output 3
13 Y2 输出 Decoded output 2
14 Y1 输出 Decoded output 1
15 Y0 输出 Decoded output 0
16 VCC 电源 Positive supply (2-6V)
  • Memory chip select decoding from address bus
  • I/O port address decoding for MCU peripherals
  • Display digit scanning (7-segment multiplex)
  • Demultiplexing single data line to 8 outputs
  • Cascaded 4-to-16 decoder with two 74HC138s
制造商 部件编号 包装 说明
TI SN74HC138DR SOIC-16 Equivalent
onsemi MC74HC138DR2G SOIC-16 Equivalent
恩智浦 74HC138PW TSSOP-16 Smaller package
恩智浦 74HCT138D SOIC-16 TTL-compatible inputs
恩智浦 74HC238D SOIC-16 Active-high output version
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质量保证

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

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4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

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If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

联系我们

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

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3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

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Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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