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Product Overview
The SN74ALS688DW from Texas Instruments is an 8-bit identity comparator designed for high-speed digital systems. It compares two 8-bit words (P and Q) and provides a low-level active output when they are equal. Fabricated with advanced Schottky process, it offers a typical propagation delay of 20 ns, making it suitable for high-performance computing and communication applications. The device operates from a single 5V supply and is available in a 20-pin SOIC package.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
4.5V to 5.5V |
| Input Voltage Range |
0V to 5.5V |
| Propagation Delay (tpd) |
20 ns (typical) |
| Output Current (IOL/IOH) |
24 mA / -15 mA |
| Operating Temperature |
0°C to 70°C |
| Package |
20-SOIC (DW) |
| Logic Family |
ALS |
| Number of Bits |
8 |
| Output Type |
Active Low, Open Collector |
Key Features
- 8-bit identity comparator with active-low output
- Typical propagation delay of 20 ns
- Low power consumption: 50 mW typical
- Open-collector output for wired-OR connection
- Input clamp diodes for improved noise margin
- Wide operating voltage range: 4.5V to 5.5V
- Industry-standard 20-SOIC package
Target Applications
- Address comparison in 5G base station controllers
- Data validation in automotive dashboard displays
- Error detection in industrial PLC systems
- Memory address decoding in networking routers
- Identity checking in server backplane management
Global Supply Chain & Wholesale Solutions
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SN74ALS688DW. Our core advantages include:
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產品概述
SN74ALS688DW 是德州儀器 (TI) 生產的 8 位元身分比較器,專為高速數位系統設計。它比較兩個 8 位元字 (P 和 Q),並在相等時提供低電平有效輸出。採用先進的肖特基製程,典型傳播延遲為 20 ns,適用於高效能運算和通訊應用。該器件在單一 5V 電源下工作,封裝為 20 引腳 SOIC。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
4.5V 至 5.5V |
| 輸入電壓範圍 |
0V 至 5.5V |
| 傳播延遲 (tpd) |
20 ns (典型值) |
| 輸出電流 (IOL/IOH) |
24 mA / -15 mA |
| 工作溫度 |
0°C 至 70°C |
| 封裝 |
20-SOIC (DW) |
| 邏輯系列 |
ALS |
| 位元數 |
8 |
| 輸出類型 |
低電平有效,開集極 |
核心特性
- 8 位元身分比較器,低電平有效輸出
- 典型傳播延遲 20 ns
- 低功耗:典型 50 mW
- 開集極輸出,支援線與連接
- 輸入箝位二極體,改善雜訊容限
- 寬工作電壓範圍:4.5V 至 5.5V
- 業界標準 20-SOIC 封裝
典型應用場景
- 5G 基地台控制器中的位址比較
- 汽車儀表板顯示器的資料驗證
- 工業 PLC 系統的錯誤檢測
- 網路路由器中的記憶體位址解碼
- 伺服器背板管理中的身分檢查
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