CD 4075 CMOS Triple 3-Input OR Gate IC – DIP 14

Description

The CD4075 CMOS Triple 3-Input OR Gate IC is a fundamental digital logic component belonging to the classic 4000-series CMOS logic family. Housed in a standard 14-pin Dual Inline Package (DIP), this monolithic integrated circuit contains three independent, exactly identical 3-input OR gates. It is designed to perform the Boolean logic OR function, meaning the output will go HIGH if any one or more of its three inputs are HIGH.

Available at Tomson Electronics, the CD4075 is highly favored by hardware engineers, educators, and hobbyists for its robust operating characteristics. It features a very wide operating voltage range of 3V to 18V, making it seamlessly compatible with both 3.3V microcontroller logic (like the ESP32 or STM32) and standard 5V systems (like Arduino), as well as higher-voltage industrial circuits. Its low power consumption and high noise immunity make it an excellent choice for custom hardware prototyping on solderless breadboards and printed circuit boards.

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Specifications

• Logic Family: 4000 Series CMOS
• Logic Function: Triple 3-Input OR Gate
• Package Type: 14-Pin DIP (Through-hole)
• Operating Supply Voltage (Vdd): 3V to 18V DC
• Maximum Input Current: 1 µA at 18V
• Operating Temperature Range: -55°C to +125°C
• Output Drive Capability: Capable of driving 2 low-power TTL loads or 1 full LS-TTL load

Datasheet

Download CD4075 Datasheet PDF

Applications

• Digital Logic Circuits: Combining multiple digital signals to trigger a single event, often used in custom glue logic for embedded systems.
• Alarm & Security Systems: Creating a circuit where an alarm sounds if sensor A, sensor B, OR sensor C is triggered.
• Industrial Controllers: Acting as robust, high-voltage-tolerant logic elements in electrically noisy industrial environments.
• Educational Prototyping: Teaching Boolean algebra and fundamental digital electronics concepts on solderless breadboards.

Frequently Asked Questions (FAQ)

Q: How does a 3-input OR gate work?
A: An OR gate evaluates its inputs using Boolean logic. For a 3-input OR gate, the output will only be LOW (0) if all three inputs (A, B, and C) are LOW. If any single input, or any combination of the inputs, receives a HIGH (1) signal, the output immediately switches to HIGH.

Q: What should I do with the inputs of the gates I am not using?
A: A strict rule for all CMOS logic ICs is that you must never leave unused inputs floating (unconnected). Floating inputs can pick up static noise, causing the gate to oscillate rapidly, which draws excessive current and can destroy the chip. Always tie unused inputs directly to Ground (LOW) or Vdd (HIGH) depending on your circuit needs. For an unused OR gate, tie the inputs to Ground.

Q: Do I need logic level converters to use this with an ESP32 or Arduino?
A: No, as long as the CD4075 is powered by the same voltage as your microcontroller's logic level. If you power the CD4075 with 3.3V, it will interface perfectly with an ESP32. If powered with 5V, it interfaces perfectly with a standard Arduino Uno.

Package Includes

• 1 × CD4075 CMOS Triple 3-Input OR Gate IC – DIP-14