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Product Overview
The SN74ALS257AD from Texas Instruments is a high-performance quad 2-input multiplexer with 3-state outputs. It selects one of two 4-bit data sources based on the state of the select input. The device operates from a 4.5V to 5.5V supply and features advanced low-power Schottky (ALS) technology for high speed and low power consumption. Housed in a 16-pin SOIC package, it is ideal for bus-oriented applications requiring minimal propagation delay.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
4.5V to 5.5V |
| Input Voltage Range |
0V to 5.5V |
| Output Voltage Range |
0V to VCC |
| Propagation Delay (tpd) |
Typ 6ns, Max 10ns |
| Power Dissipation |
22 mW typical |
| Operating Temperature |
0°C to 70°C |
| Package |
16-SOIC |
| Logic Family |
ALS |
| Number of Channels |
4 |
| Inputs per Channel |
2 |
| Output Type |
3-State |
Key Features
- Quad 2-input multiplexer with common select and enable
- 3-state outputs for bus-oriented systems
- Low power consumption: 22 mW typical
- High speed: propagation delay 6 ns typical
- Wide operating voltage range: 4.5V to 5.5V
- Inputs are overvoltage tolerant up to 5.5V
- Outputs sink/source 24 mA
- Standard 16-SOIC package for easy integration
Target Applications
- Data multiplexing in 5G base station control boards
- Signal routing in automotive dashboard displays
- Bus switching in industrial PLC systems
- Memory address multiplexing in embedded systems
- Peripheral selection in server motherboards
Global Supply Chain & Wholesale Solutions
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SN74ALS257AD. Our core advantages include:
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and seals to ensure ESD protection and physical integrity.
產品概述
SN74ALS257AD 是德州儀器 (TI) 的一款高性能四路2輸入多路復用器,帶三態輸出。它根據選擇輸入的狀態,從兩個4位數據源中選擇一個。該器件在4.5V至5.5V電源下工作,採用先進的低功耗肖特基 (ALS) 技術,實現高速和低功耗。封裝為16引腳SOIC,適用於需要最小傳播延遲的總線應用。
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 |
| 輸出電壓範圍 |
0V 至 VCC |
| 傳播延遲 (tpd) |
典型 6ns,最大 10ns |
| 功耗 |
典型 22 mW |
| 工作溫度 |
0°C 至 70°C |
| 封裝 |
16-SOIC |
| 邏輯系列 |
ALS |
| 通道數 |
4 |
| 每通道輸入數 |
2 |
| 輸出類型 |
三態 |
核心特性
- 四路2輸入多路復用器,帶公共選擇和使能
- 三態輸出,適用於總線系統
- 低功耗:典型 22 mW
- 高速:傳播延遲典型 6 ns
- 寬工作電壓範圍:4.5V 至 5.5V
- 輸入過壓容限高達 5.5V
- 輸出拉/灌電流 24 mA
- 標準 16-SOIC 封裝,易於集成
典型應用場景
- 5G基站控制板的數據多路復用
- 汽車儀表盤顯示的訊號路由
- 工業PLC系統的總線切換
- 嵌入式系統的存儲器地址多路復用
- 服務器主板的外設選擇
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