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Product Overview
The SN74HCT138DT is a high-performance 3-to-8 line decoder/demultiplexer from Texas Instruments, designed for 5V CMOS logic systems. It features three enable inputs for flexible control and is ideal for memory decoding, data routing, and address decoding in digital systems. The device is housed in a 16-pin SOIC package, offering a compact solution for space-constrained applications.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
4.5V to 5.5V |
| Input Voltage (VI) |
0V to VCC |
| Output Voltage (VO) |
0V to VCC |
| High-Level Input Voltage (VIH) |
2V (min) |
| Low-Level Input Voltage (VIL) |
0.8V (max) |
| High-Level Output Current (IOH) |
-4 mA |
| Low-Level Output Current (IOL) |
4 mA |
| Propagation Delay (tpd) |
23 ns (typ) at VCC=5V, CL=50pF |
| Operating Temperature |
-40°C to +85°C |
| Package |
16-SOIC |
Key Features
- 3-to-8 line decoder/demultiplexer with three enable inputs
- Compatible with TTL logic levels
- Low power consumption: 80 µA (max) ICC
- High noise immunity: typical VNH = VNL = 28% VCC
- Balanced propagation delays
- Outputs can drive up to 10 LSTTL loads
- ESD protection exceeds 2000 V per MIL-STD-883, Method 3015
Target Applications
- Memory decoding in 5G base station control boards
- Address decoding in automotive dashboard displays
- Data routing in industrial PLC systems
- Demultiplexing in test and measurement equipment
- Control signal distribution in server motherboards
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
SN74HCT138DT. 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
SN74HCT138DT 是德州儀器推出的一款高性能3線-8線解碼器/多路分配器,專為5V CMOS邏輯系統設計。它具備三個使能輸入,提供靈活的控制方式,非常適合數字系統中的存儲器解碼、數據路由和地址解碼。器件採用16引腳SOIC封裝,為空間受限的應用提供緊湊解決方案。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
4.5V 至 5.5V |
| 輸入電壓 (VI) |
0V 至 VCC |
| 輸出電壓 (VO) |
0V 至 VCC |
| 高電平輸入電壓 (VIH) |
2V (最小值) |
| 低電平輸入電壓 (VIL) |
0.8V (最大值) |
| 高電平輸出電流 (IOH) |
-4 mA |
| 低電平輸出電流 (IOL) |
4 mA |
| 傳播延遲 (tpd) |
23 ns (典型值) 在 VCC=5V, CL=50pF 條件下 |
| 工作溫度 |
-40°C 至 +85°C |
| 封裝 |
16-SOIC |
核心特性
- 3線-8線解碼器/多路分配器,帶三個使能輸入
- 兼容TTL邏輯電平
- 低功耗:ICC 最大 80 µA
- 高抗噪能力:典型 VNH = VNL = 28% VCC
- 平衡的傳播延遲
- 輸出可驅動多達10個LSTTL負載
- ESD保護超過2000V,符合MIL-STD-883方法3015
典型應用場景
- 5G基站控制板中的存儲器解碼
- 汽車儀表盤顯示中的地址解碼
- 工業PLC系統中的數據路由
- 測試與測量設備中的多路分配
- 服務器主板中的控制信號分配
環球供應鏈與批發合作夥伴方案
在 Jasin Chip,我們為 SN74HCT138DT 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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