CD4001 Quad 2-Input NOR Gate IC Technical Summary

Overview

The CD4001BC is a monolithic CMOS integrated circuit fabricated with complementary MOS (CMOS) technology to achieve wide power supply range, low power consumption, high noise immunity, and symmetric controlled rise and fall times. This device contains four independent 2-input NOR gates. Each gate performs the Boolean function Y = A+B in positive logic.

As part of the CD4000 series, the CD4001 is notable for its robustness and versatility in digital logic applications. The device is pin-compatible with many standard logic families while offering superior power characteristics compared to TTL alternatives.

Key Features

• Wide supply voltage range: 3V to 15V
• Low power consumption: 10nW (typical) at 5V
• High noise immunity: 0.45 VDD (typical)
• Balanced propagation delays
• Symmetrical output drive capability
• Standardized symmetrical output characteristics
• 100% tested for quiescent current at 20V
• Maximum input current of 1µA at 18V over full temperature range
• Meets all requirements of JEDEC Tentative Standard No. 13B

Applications

The CD4001 finds use in a wide variety of digital logic applications including:

• General purpose logic circuits
• Waveform generation
• Oscillator circuits
• Multivibrator designs
• Industrial control systems
• Automotive electronics
• Consumer electronics
• Signal processing
• Data communication systems

The device's wide operating voltage range makes it particularly useful in battery-powered applications where supply voltage may vary significantly during operation.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VDD): -0.5V to +18V
• Input Voltage (VIN): -0.5V to VDD + 0.5V
• DC Input Current (IIN): ±10mA
• Power Dissipation (PD): 500mW
• Operating Temperature Range (TA): -55°C to +125°C
• Storage Temperature Range (TSTG): -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage Range: 3V to 15V
• Input Voltage Range: 0V to VDD
• Operating Temperature Range: -55°C to +125°C

DC Electrical Characteristics (VDD = 5V, TA = 25°C)

• High-Level Output Voltage (VOH): 4.95V (min)
• Low-Level Output Voltage (VOL): 0.05V (max)
• Input Leakage Current (IIN): ±0.1µA (max)
• Quiescent Device Current (IDD): 1µA (max)

AC Electrical Characteristics (VDD = 10V, CL = 50pF, TA = 25°C)

• Propagation Delay Time (tPLH, tPHL): 60ns (max)
• Transition Time (tTLH, tTHL): 100ns (max)
• Maximum Clock Frequency: 8MHz (typ)

Package Information

The CD4001 is available in several industry-standard packages:

• 14-Lead PDIP (Plastic Dual In-line Package)
  • Package Code: D
  • Dimensions: 19.3mm x 6.35mm
  • Lead Pitch: 2.54mm
• 14-Lead SOIC (Small Outline Integrated Circuit)
  • Package Code: M
  • Dimensions: 8.65mm x 3.9mm
  • Lead Pitch: 1.27mm
• 14-Lead TSSOP (Thin Shrink Small Outline Package)
  • Package Code: PW
  • Dimensions: 5mm x 4.4mm
  • Lead Pitch: 0.65mm

Functional Description

Each of the four NOR gates in the CD4001 implements the Boolean NOR function. The output of each gate goes low (logic 0) when any input is high (logic 1). The output only goes high (logic 1) when all inputs are low (logic 0).

The CMOS technology used in the CD4001 provides several advantages over bipolar logic families:

• Extremely high input impedance (typically >10^12 ohms)
• Very low power consumption, especially in static conditions
• Output drive capability that is symmetrical for sourcing and sinking current
• Excellent noise margin (typically 45% of VDD)

Design Considerations

Power Supply Decoupling

Proper power supply decoupling is essential for reliable operation. A 0.1µF ceramic capacitor should be placed as close as possible between VDD and VSS pins.

Unused Inputs

All unused inputs must be tied to either VDD or VSS. Leaving inputs floating can cause excessive power consumption and erratic operation.

Output Loading

The CD4001 can typically drive two LS-TTL loads or one low-power Schottky TTL load when operating at 5V. For CMOS loads, the maximum fanout is determined by speed requirements.

Reliability Information

• ESD Rating: 2000V (Human Body Model)
• Latch-up Immunity: Exceeds 100mA
• Moisture Sensitivity Level (MSL): 1 (Unlimited floor life at ≤30°C/85%RH)

Ordering Information

The device is available with several ordering options:

• CD4001BCM: SOIC package, commercial temperature range
• CD4001BCN: PDIP package, commercial temperature range
• CD4001BCPW: TSSOP package, commercial temperature range
• CD4001BF: Ceramic DIP package, military temperature range