CD4069UBE CD4069UBE IC Hex Inverter – 3V to 18V, 6-Channel Logic CMOS IC

CD4069UBE CMOS Hex Inverter – Wide Voltage Range, Low-Power Logic IC

The CD4069UBE from Texas Instruments (TI) is a CMOS-compatible hex inverter integrating six independent buffer-free logic inverters in a single IC. It operates across a wide supply voltage range (3V to 18V), making it suitable for high-voltage digital systems, battery-powered devices, and industrial control applications.

Key advantages include ultra-low input current (just 1µA max at 18V, 100nA at 25°C), ensuring minimal power consumption in always-on circuits. With a typical propagation delay of 30ns at 10V, it provides medium-speed switching, ideal for pulse shaping, oscillators, and clock generation. Its symmetrical output characteristics (t_PHL = t_PLH) ensure precise signal integrity, while the ±6.8mA output drive is sufficient for LED drivers and small loads.

Compared to CD4009/CD4049 buffer-based inverters, the CD4069UBE IC Hex Inverter eliminates buffering stages, reducing power dissipation and board space. It excels in RC oscillators, sensor interfaces, and high-impedance amplifiers where power efficiency matters. Supporting an extended temperature range (-55°C to +125°C), it is also ideal for automotive, industrial, and military-grade electronics.

Available in PDIP-14, SOIC-14, and TSSOP-14 packages, this IC is RoHS-compliant (except CDIP variants), offering flexibility for both prototyping and mass production. Whether used as a standalone signal inverter or part of a larger logic circuit, the CD4069UB delivers reliable performance with low quiescent current (<150µA) and high noise immunity.

Key Specifications

CD4069UBE IC Hex Inverter Applications

1. Logic Signal Inversion

• Typical Circuit: Acts as a basic logic inverter, converting TTL/CMOS input levels to complementary outputs.
• Key Advantages:
  • Ultra-low input current (<1µA) prevents loading effects on input circuitry
  • Symmetrical output characteristics (t_PHL = t_PLH ≈ 30ns @10V) ensure signal integrity
• Use Cases:
  • Level shifting between 3.3V MCUs and 5V relays
  • Building synchronous logic systems with CD4013 flip-flops

2. Pulse Shaping Circuits

• Implementation:
  • Forms Schmitt trigger with RC network (e.g., R=10kΩ, C=100pF) for noise immunity
  • Supports input tolerance up to 18V for signal recovery in high-noise environments
• Applications:
  • Debouncing industrial sensor signals (e.g., optical encoder outputs)
  • Restoring distorted digital signals in long-distance transmissions

3. Oscillators & Clock Generators

• Circuit Topologies:
  • RC Ring Oscillator: 3-stage cascaded inverters → f ≈ 1/(2.2RC)
  • Crystal Oscillator: Achieves <50ppm stability with 1MHz crystal
• Performance Comparison:

  Configuration	Frequency Range	Stability
  RC Oscillator	1Hz–1MHz	±5%
  Crystal	1kHz–20MHz	±50ppm

4. High-Impedance Amplifiers

• Key Parameters:
  • Input impedance >10¹²Ω (typical CMOS)
  • Drives capacitive loads up to 100pF
• Medical Applications:
  • Bioelectric signal preamplification (EEG/ECG bandpass filtering)
  • Piezoelectric sensor interfacing

5. Low-Power Digital Logic

• Power Efficiency:
  • Quiescent current as low as 20nA @5V
  • Dynamic power consumption of 0.1µW/MHz @5V
• IoT Examples:
  • BLE wake-up circuits powered by coin-cell batteries
  • Signal conditioning for solar-powered sensor nodes

6. Industrial Control Systems

• Harsh Environment Reliability:
  • Passes -40°C cold-start tests (functional at V_CC=3V)
  • 18V tolerance ideal for 24V industrial bus isolation
• Implementation Examples:
  • PLC digital input modules
  • Motor driver fault signal inversion

Enhanced Application Comparisons

Design Tips

• Power Decoupling: Add 100nF ceramic capacitor between V_DD/GND for HF noise suppression
• Unused Pins: Tie all floating inputs to V_DD or GND to prevent oscillation
• LED Driving: Series 470Ω resistor (@12V) to limit output current below 6.8mA

Comparison with Alternatives

➡ Why Choose CD4069UBE?
✔ Best for high-voltage (up to 18V) designs
✔ Low power consumption (µA-level input current)
✔ Wider industrial temperature range (-55°C to +125°C)

Package Options & Ordering Information