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Product Overview
The CD74AC257M from Texas Instruments is a high-speed CMOS quad 2-input multiplexer with non-inverting outputs. It selects one of two 4-bit data sources based on the state of the select input (S). The device operates over a wide voltage range of 1.5V to 5.5V, making it suitable for battery-powered and low-voltage applications. The 16-SOIC package offers a compact footprint for space-constrained designs.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
1.5V to 5.5V |
| Input Voltage (VI) |
0V to VCC |
| Output Voltage (VO) |
0V to VCC |
| High-Level Input Voltage (VIH) |
0.7 × VCC (min) |
| Low-Level Input Voltage (VIL) |
0.3 × VCC (max) |
| High-Level Output Current (IOH) |
-24 mA at VCC = 4.5V |
| Low-Level Output Current (IOL) |
24 mA at VCC = 4.5V |
| Propagation Delay (tpd) |
6.5 ns typ at VCC = 5V, CL = 50 pF |
| Operating Temperature |
-55°C to +125°C |
| Package |
16-SOIC |
Key Features
- Wide operating voltage range: 1.5V to 5.5V
- High noise immunity: VNIH = VNIL = 28% of VCC (min)
- Low power consumption: ICC = 4 µA max at 25°C
- High speed: tpd = 6.5 ns typ at 5V
- Balanced propagation delays: tPLH and tPHL
- Inputs accept voltages up to 5.5V regardless of VCC
- Outputs can drive up to 10 LSTTL loads
Target Applications
- 5G base station control logic: data routing between baseband and RF modules
- Automotive dashboard display: selecting sensor data for instrument cluster
- Industrial automation: multiplexing sensor inputs to PLC
- Consumer electronics: signal selection in portable devices
- Data communication: bus switching in networking equipment
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
CD74AC257M. Our core advantages include:
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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
CD74AC257M 是德州儀器 (TI) 的一款高速 CMOS 四路 2 輸入多路復用器,具有同相輸出。它根據選擇輸入 (S) 的狀態選擇兩個 4 位數據源之一。該器件在 1.5V 至 5.5V 的寬電壓範圍內工作,適用於電池供電和低電壓應用。16-SOIC 封裝為空間受限的設計提供了緊湊的佔位面積。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
1.5V 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) |
0.7 × VCC (最小值) |
| 低電平輸入電壓 (VIL) |
0.3 × VCC (最大值) |
| 高電平輸出電流 (IOH) |
VCC = 4.5V 時 -24 mA |
| 低電平輸出電流 (IOL) |
VCC = 4.5V 時 24 mA |
| 傳播延遲 (tpd) |
VCC = 5V, CL = 50 pF 時典型值 6.5 ns |
| 工作溫度 |
-55°C 至 +125°C |
| 封裝 |
16-SOIC |
核心特性
- 寬工作電壓範圍:1.5V 至 5.5V
- 高抗噪能力:VNIH = VNIL = 28% VCC (最小值)
- 低功耗:25°C 時 ICC 最大值 4 µA
- 高速:5V 時 tpd 典型值 6.5 ns
- 平衡的傳播延遲:tPLH 和 tPHL
- 輸入可接受高達 5.5V 的電壓,與 VCC 無關
- 輸出可驅動多達 10 個 LSTTL 負載
典型應用場景
- 5G 基站控制邏輯:基帶與射頻模塊之間的數據路由
- 汽車儀表盤顯示:選擇傳感器數據用於儀表組
- 工業自動化:將傳感器輸入多路復用到 PLC
- 消費電子:便攜設備中的信號選擇
- 數據通信:網絡設備中的總線切換
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