CD74HC27E-NG Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments CD74HC27E-NG is a triple 3-input NOR gate logic IC from the HC (High-Speed CMOS) family operating at 2V to 6V supply voltage. Features three independent NOR gates with wide voltage range, low power consumption, and TTL-compatible inputs in a 14-pin DIP package. RoHS-compliant lead-free construction available in stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC27E-NG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Triple 3-input NOR gate in HC CMOS technology operating from 2V to 6V supply for versatile logic interfacing across multiple voltage domains
- High-speed CMOS design with TTL-compatible inputs providing wide noise margin and low quiescent current for battery-efficient logic applications
- Three independent NOR gate channels in a single 14-pin DIP package enabling complex combinational logic with minimal component count
- RoHS-compliant lead-free (NG suffix) construction in through-hole 14-pin DIP for breadboard prototyping and through-hole PCB designs
Applications
The CD74HC27E-NG triple 3-input NOR gate is a fundamental building block for combinational logic circuits in microcontroller-based systems, enabling implementation of complex Boolean logic functions including AND, OR, NAND, and NOT through NOR gate combinations. It is commonly used in decoding circuits, address decoders, interrupt logic, and state machines in embedded systems where simple glue logic is needed to interface between digital subsystems. The wide 2V-6V operating range makes it suitable for both 3.3V and 5V logic systems, including Arduino, Raspberry Pi peripherals, and legacy 5V TTL-compatible designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CD74HC27E-NG and how many gates does it contain?
The CD74HC27E-NG is a triple 3-input NOR gate IC from Texas Instruments in the HC (High-Speed CMOS) logic family. It contains three independent NOR gates, each accepting three inputs and producing one output. A NOR gate output is HIGH only when all three inputs are LOW, making it a universal gate capable of implementing any logic function.
What voltage range does the CD74HC27E-NG operate at?
The CD74HC27E-NG operates over a wide supply voltage range of 2V to 6V, making it compatible with both 3.3V and 5V logic systems. The HC CMOS family features TTL-compatible input thresholds, enabling direct interfacing with TTL logic outputs while offering CMOS-level low power consumption compared to equivalent bipolar TTL devices.
What package does the CD74HC27E-NG come in?
The CD74HC27E-NG is housed in a 14-pin DIP (Dual Inline Package), which is a through-hole package with 0.1-inch pin spacing ideal for breadboard prototyping and through-hole PCB assembly. The E suffix indicates the PDIP package, and the NG suffix denotes RoHS-compliant lead-free construction meeting current environmental requirements.
What are common applications for the CD74HC27E-NG NOR gate?
Common applications include combinational logic design using NOR gate universality to implement AND, OR, and NOT functions; address decoding in memory and peripheral interfacing; interrupt request logic and enable signal generation; clock gating and signal conditioning; and educational/prototyping use where fundamental CMOS logic gates are needed. The triple configuration allows compact implementation of multi-gate logic functions.
Can the CD74HC27E-NG replace TTL 74LS27 or 74S27 devices?
Yes, the CD74HC27E-NG is a direct functional and pin-compatible replacement for 74LS27, 74S27, and other 27-series triple 3-input NOR gate ICs in 5V systems. The HC CMOS technology offers significantly lower power consumption than the TTL equivalents while maintaining TTL-compatible input thresholds. In 3.3V systems, ensure TTL input levels are within the HC family's VIH and VIL specifications before substituting.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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