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Product Overview
The SN74LS139AN is a dual 2-line to 4-line decoder/demultiplexer designed and manufactured by Texas Instruments (TI). It is housed in a 16-pin plastic dual-in-line package (PDIP). Each decoder section has an active-low enable input and four active-low outputs. The device is ideal for memory decoding, data routing, and general-purpose logic applications where low power consumption and high speed are required.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
4.75V to 5.25V |
| High-Level Input Voltage (VIH) |
2V min |
| Low-Level Input Voltage (VIL) |
0.8V max |
| High-Level Output Current (IOH) |
-0.4 mA |
| Low-Level Output Current (IOL) |
8 mA |
| Propagation Delay Time (tpd) |
21 ns typ |
| Power Dissipation |
45 mW typ |
| Operating Temperature Range |
0°C to 70°C |
| Package |
16-PDIP |
Key Features
- Dual 2-line to 4-line decoder/demultiplexer
- Active-low outputs and enable inputs
- Schottky-clamped transistors for high speed
- Low power consumption: 45 mW typical
- Input clamp diodes limit transmission-line effects
- Fully compatible with TTL logic levels
- Wide operating temperature range: 0°C to 70°C
Target Applications
- Memory address decoding in embedded systems (e.g., microcontroller-based data loggers)
- Data routing in telecommunications equipment (e.g., 5G base station control boards)
- Demultiplexing in industrial automation (e.g., PLC I/O modules)
- Display driver selection in automotive dashboards
- General-purpose logic in consumer electronics (e.g., smart home hubs)
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
SN74LS139AN. Our core advantages include:
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24/7 Global Customer Support: Professional team providing instant
quotes and technical support worldwide.
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In-stock Inventory, Same-day Shipping: We maintain localized stock;
orders confirmed before 4 PM are shipped the same day.
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HK-SZ Synergy, Flexible Settlement: Direct global shipping from
Shenzhen with support for HK bank transfers and multi-currency.
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Escrow Secured Transactions: We support Escrow.com for secure
transactions, ensuring peace of mind for batch orders.
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BOM Kitting & Sampling Services: Specialized sourcing for
testing samples and urgent shortage components.
Quality Assurance & Compliance
Jasin Chip guarantees that all delivered products are 100% original factory stock
with full quality assurance and traceability.
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100% Original & Authentic: All components are guaranteed to
be authentic with strict quality control.
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RoHS Compliant: All electronic components comply with international
environmental and safety standards.
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Original Factory Packaging: We maintain original factory packaging
and seals to ensure ESD protection and physical integrity.
產品概述
SN74LS139AN 是德州儀器 (TI) 設計和製造的雙路 2 線至 4 線解碼器/多路分配器,採用 16 引腳塑封雙列直插封裝 (PDIP)。每個解碼器部分都有一個低電平有效的使能輸入和四個低電平有效的輸出。該器件非常適合需要低功耗和高速度的存儲器解碼、數據路由和通用邏輯應用。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
4.75V 至 5.25V |
| 高電平輸入電壓 (VIH) |
最小值 2V |
| 低電平輸入電壓 (VIL) |
最大值 0.8V |
| 高電平輸出電流 (IOH) |
-0.4 mA |
| 低電平輸出電流 (IOL) |
8 mA |
| 傳播延遲時間 (tpd) |
典型值 21 ns |
| 功耗 |
典型值 45 mW |
| 工作溫度範圍 |
0°C 至 70°C |
| 封裝 |
16-PDIP |
核心特性
- 雙路 2 線至 4 線解碼器/多路分配器
- 低電平有效輸出和使能輸入
- 肖特基鉗位晶體管實現高速
- 低功耗:典型值 45 mW
- 輸入箝位二極管限制傳輸線效應
- 完全兼容 TTL 邏輯電平
- 寬工作溫度範圍:0°C 至 70°C
典型應用場景
- 嵌入式系統中的存儲器地址解碼(例如,基於微控制器的數據記錄器)
- 電信設備中的數據路由(例如,5G 基站控制板)
- 工業自動化中的多路分配(例如,PLC I/O 模塊)
- 汽車儀表盤中的顯示驅動選擇
- 消費電子中的通用邏輯(例如,智能家居中樞)
環球供應鏈與批發合作夥伴方案
在 Jasin Chip,我們為 SN74LS139AN 提供全面的供應鏈與批發解決方案。
我們的核心優勢包括:
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全天候環球客戶支援:專業團隊為您提供即時報價及技術支援,無需漫長等待。
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現貨庫存,即日發貨:確保現貨充足。下午 4 點前確認訂單,即可安排當天寄出。
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深港聯動,結算靈活:深圳直發全球,物流高效可靠;支援香港銀行戶口轉賬及多幣種結算。
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Escrow 擔保交易:支援 Escrow.com 平台交易,保障買賣雙方權益,小批量訂單亦可安心在線下單。
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BOM 配單與樣板服務:提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。
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Jasin Chip 承諾所有出貨產品均為原廠正貨,具備完善的品質保證及產品可追溯性。
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符合 RoHS 認證:所有電子元器件均符合國際環保標準及相關安全認證。
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原廠封裝保護:嚴格保留原廠原始包裝及封條,確保物流過程中的靜電防護 (ESD) 與物理安全。
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