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Product Overview
The CD74HC42E from Texas Instruments is a high-speed CMOS BCD-to-decimal decoder/demultiplexer. It converts a 4-bit BCD input into one of ten active-low decimal outputs. Fabricated with silicon-gate technology, it combines the low power consumption of CMOS with the speed of LSTTL. The device is ideal for driving 7-segment displays, memory address decoding, and other digital logic applications requiring low power and high noise immunity.
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) |
1.35V max (at VCC=4.5V) |
| High-Level Output Current (IOH) |
-4 mA (at VCC=4.5V) |
| Low-Level Output Current (IOL) |
4 mA (at VCC=4.5V) |
| Propagation Delay (tpd) |
15 ns typ (at VCC=5V, CL=50pF) |
| Power Dissipation (PD) |
500 mW |
| Operating Temperature |
-55°C to +125°C |
| Package |
16-PDIP |
Key Features
- High-speed CMOS technology
- Low power consumption: 80 µA max (at 25°C)
- BCD to decimal decoding
- Active-low outputs for direct LED driving
- Wide supply voltage range: 2V to 6V
- High noise immunity: typical VNIH = VNIL = 28% of VCC
- Balanced propagation delays
- Standard 16-pin DIP package
Target Applications
- 7-segment display drivers in industrial control panels
- Memory address decoding in microcontroller systems (e.g., Arduino, Raspberry Pi)
- Digital logic circuits in 5G base station control modules
- Automotive dashboard display drivers
- Data routing in communication equipment
- Test and measurement instruments
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
CD74HC42E. Our core advantages include:
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24/7 Global Customer Support: Professional team providing instant
quotes and technical support worldwide.
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orders confirmed before 4 PM are shipped the same day.
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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
CD74HC42E 是德州儀器 (TI) 生產的高速 CMOS BCD 至十進制解碼器/多路分配器。它將 4 位 BCD 輸入轉換為十個低電平有效的十進制輸出之一。採用硅柵極工藝製造,兼具 CMOS 的低功耗和 LSTTL 的速度。該器件非常適合驅動 7 段顯示器、存儲器地址解碼以及其他需要低功耗和高抗噪能力的數字邏輯應用。
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 |
| 高電平輸入電壓 (VIH) |
最小值 3.15V (VCC=4.5V 時) |
| 低電平輸入電壓 (VIL) |
最大值 1.35V (VCC=4.5V 時) |
| 高電平輸出電流 (IOH) |
-4 mA (VCC=4.5V 時) |
| 低電平輸出電流 (IOL) |
4 mA (VCC=4.5V 時) |
| 傳播延遲 (tpd) |
典型值 15 ns (VCC=5V, CL=50pF) |
| 功耗 (PD) |
500 mW |
| 工作溫度 |
-55°C 至 +125°C |
| 封裝 |
16-PDIP |
核心特性
- 高速 CMOS 技術
- 低功耗:最大 80 µA (25°C 時)
- BCD 至十進制解碼
- 低電平有效輸出,可直接驅動 LED
- 寬電源電壓範圍:2V 至 6V
- 高抗噪能力:典型 VNIH = VNIL = 28% VCC
- 平衡的傳播延遲
- 標準 16 引腳 DIP 封裝
典型應用場景
- 工業控制面板中的 7 段顯示器驅動
- 微控制器系統(如 Arduino、Raspberry Pi)中的存儲器地址解碼
- 5G 基站控制模塊中的數字邏輯電路
- 汽車儀表盤顯示驅動
- 通信設備中的數據路由
- 測試與測量儀器
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