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Product Overview
The SN74HC257PWR from Texas Instruments is a high-speed CMOS quad 2-input multiplexer with 3-state outputs. It selects one of two 4-bit data sources (A or B) based on the state of the select input (S). The outputs are disabled when the output enable input (OE) is high. This device operates from 2V to 6V and is ideal for bus-oriented applications.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
2V to 6V |
| Input Voltage (VI) |
0V to VCC |
| Output Voltage (VO) |
0V to VCC |
| High-Level Output Current (IOH) |
-5.2 mA (max) at VCC=4.5V |
| Low-Level Output Current (IOL) |
5.2 mA (max) at VCC=4.5V |
| Propagation Delay (tpd) |
12 ns (typ) at VCC=4.5V, CL=50pF |
| Input Capacitance (Ci) |
3 pF (typ) |
| Operating Temperature |
-40°C to +85°C |
| Package |
16-TSSOP |
Key Features
- Wide operating voltage range: 2V to 6V
- High noise immunity: VNIH = VNIL = 28% of VCC (min)
- Low power consumption: ICC = 4 µA (max) at TA=25°C
- 3-state outputs for bus-oriented applications
- Inputs accept voltages up to VCC
- ESD protection exceeds JESD 22
Target Applications
- Data multiplexing in 5G base stations (e.g., channel selection)
- Signal routing in automotive dashboards (e.g., display mode selection)
- Industrial control systems (e.g., PLC I/O multiplexing)
- Consumer electronics (e.g., TV input selection)
- Communication equipment (e.g., router port switching)
Global Supply Chain & Wholesale Solutions
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SN74HC257PWR. Our core advantages include:
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with full quality assurance and traceability.
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be authentic with strict quality control.
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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
SN74HC257PWR 是德州儀器的一款高速 CMOS 四路 2 輸入多路復用器,具有三態輸出。它根據選擇輸入(S)的狀態選擇兩個 4 位數據源(A 或 B)之一。當輸出使能輸入(OE)為高電平時,輸出被禁用。該器件的工作電壓範圍為 2V 至 6V,非常適合總線導向的應用。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
2V 至 6V |
| 輸入電壓 (VI) |
0V 至 VCC |
| 輸出電壓 (VO) |
0V 至 VCC |
| 高電平輸出電流 (IOH) |
-5.2 mA (最大) 在 VCC=4.5V 時 |
| 低電平輸出電流 (IOL) |
5.2 mA (最大) 在 VCC=4.5V 時 |
| 傳播延遲 (tpd) |
12 ns (典型) 在 VCC=4.5V, CL=50pF 時 |
| 輸入電容 (Ci) |
3 pF (典型) |
| 工作溫度 |
-40°C 至 +85°C |
| 封裝 |
16-TSSOP |
核心特性
- 寬工作電壓範圍:2V 至 6V
- 高抗噪能力:VNIH = VNIL = 28% of VCC (最小)
- 低功耗:ICC = 4 µA (最大) 在 TA=25°C 時
- 三態輸出,適用於總線導向應用
- 輸入可承受高達 VCC 的電壓
- ESD 保護超過 JESD 22 標準
典型應用場景
- 5G 基站中的數據多路復用(例如通道選擇)
- 汽車儀表盤中的信號路由(例如顯示模式選擇)
- 工業控制系統(例如 PLC I/O 多路復用)
- 消費電子產品(例如電視輸入選擇)
- 通信設備(例如路由器端口切換)
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