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Product Overview
The SN74HC148DT from Texas Instruments is a high-performance 8-to-3 line priority encoder in a compact 16-SOIC package. It encodes eight data inputs to a three-bit binary code, with the highest priority input determining the output. Operating from 2V to 6V, it features low power consumption and high noise immunity, making it ideal for digital systems requiring efficient data prioritization.
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 Input Voltage (VIH) |
3.15V (min) at VCC=4.5V |
| Low-Level Input Voltage (VIL) |
0.9V (max) at VCC=4.5V |
| High-Level Output Current (IOH) |
-4mA (max) at VCC=4.5V |
| Low-Level Output Current (IOL) |
4mA (max) at VCC=4.5V |
| Propagation Delay (tpd) |
23ns (typ) at VCC=4.5V, CL=50pF |
| Operating Temperature |
-40°C to +85°C |
| Package |
16-SOIC |
Key Features
- 8-to-3 line priority encoding with active low inputs and outputs
- Wide operating voltage range: 2V to 6V
- Low power consumption: 80µA (max) ICC
- High noise immunity: typical VNH = 28% of VCC
- Inputs accept voltages up to VCC
- Outputs can drive up to 10 LSTTL loads
- ESD protection exceeds 2000V per MIL-STD-883, Method 3015
Target Applications
The SN74HC148DT is suitable for various digital systems requiring priority encoding, such as:
- 5G base station control logic for interrupt prioritization
- Automotive dashboard display controllers for input selection
- Industrial PLCs for sensor input encoding
- Medical equipment for alarm priority handling
- Consumer electronics like gaming consoles for button input encoding
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
SN74HC148DT. Our core advantages include:
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24/7 Global Customer Support: Professional team providing instant
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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
SN74HC148DT 是德州儀器(TI)推出的一款高性能8線-3線優先級編碼器,採用緊湊的16-SOIC封裝。它將八個數據輸入編碼為三位二進制代碼,優先級最高的輸入決定輸出。工作電壓範圍為2V至6V,具有低功耗和高抗噪聲能力,非常適合需要高效數據優先級處理的數字系統。
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 |
| 高電平輸入電壓 (VIH) |
VCC=4.5V 時最小值 3.15V |
| 低電平輸入電壓 (VIL) |
VCC=4.5V 時最大值 0.9V |
| 高電平輸出電流 (IOH) |
VCC=4.5V 時最大值 -4mA |
| 低電平輸出電流 (IOL) |
VCC=4.5V 時最大值 4mA |
| 傳播延遲 (tpd) |
VCC=4.5V, CL=50pF 時典型值 23ns |
| 工作溫度 |
-40°C 至 +85°C |
| 封裝 |
16-SOIC |
核心特性
- 8線-3線優先級編碼,輸入和輸出均為低電平有效
- 寬工作電壓範圍:2V 至 6V
- 低功耗:ICC 最大值 80µA
- 高抗噪聲能力:典型 VNH 為 VCC 的 28%
- 輸入可接受高達 VCC 的電壓
- 輸出可驅動多達 10 個 LSTTL 負載
- ESD 保護超過 2000V(根據 MIL-STD-883 方法 3015)
典型應用場景
SN74HC148DT 適用於需要優先級編碼的各種數字系統,例如:
- 5G 基站控制邏輯中的中斷優先級處理
- 汽車儀表盤顯示控制器中的輸入選擇
- 工業 PLC 中的傳感器輸入編碼
- 醫療設備中的警報優先級處理
- 消費電子產品(如遊戲機)中的按鍵輸入編碼
環球供應鏈與批發合作夥伴方案
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