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CD4001 – Quad 2‑Input NOR Gate 14‑pin DIp

⚙️ CD4001 – Quad 2‑Input CMOS NOR Gate IC (14‑pin DIP)

📝 Overview

The CD4001 is a CMOS-based integrated circuit that houses four independent 2-input NOR gates within a single 14-pin package. It operates over a broad voltage range (3 V to 18 V), making it suitable for diverse logic applications—such as gating, inversion, timing, and SR latches—in electronics and microcontroller projects ti.com+14circuits-diy.com+14circuits-diy.com+14.

🔍 Key Features

🧩 Pin Configuration (14‑pin DIP)


CopyEdit
      ________
 A1 –|1      14|– VDD (3–18 V)
 B1 –|2      13|– B4
 Q1 –|3      12|– A4
 Q2 –|4      11|– Q4
 A2 –|5      10|– Q3
 B2 –|6       9|– B3
 GND –|7       8|– A3
      ‾‾‾‾‾‾‾‾

Refer to diagrams in 

🔧 Example Usage

  • NOR Logic: Outputs HIGH only when all inputs are LOW

  • Digital Latching: Build SR latches using two NOR gates

  • Oscillator & Timer: Compose RC timers or blinking circuits 

  • Logic Probes: Design simple testing tools (e.g. LED indicators)

📦 Applications

  • Digital gating, signal conditioning

  • SR latch and memory circuits

  • Timers, oscillators, delay elements

  • Alarm or blink generators 

  • Universal NOR-based logic arrays

✅ Resources

  1. 📄 Datasheet (PDF) – Official specs, timing, output drive, voltage levels from Texas Instruments, Fairchild, etc. edn.com+1alldatasheet.com+1

  2. 🎥 YouTube Tutorial – Intro to NOR logic with CD4001 explanation and timing chart faranux.com+13youtube.com+13build-electronic-circuits.com+13

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