CD74HCT4075EG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HCT4075EG4 is a triple 3-input OR gate IC in HCT logic family, operating from a 4.5 V to 5.5 V supply with TTL-compatible inputs. Delivers propagation delays under 16 ns with 25 mA output drive in a 14-DIP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD74HCT4075EG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Triple 3-input OR gate in HCT logic family with TTL-compatible input thresholds for seamless interfacing with 5 V TTL and CMOS logic systems
- Wide operating supply range of 4.5 V to 5.5 V with propagation delay under 16 ns at 5 V enabling high-speed combinational logic design
- 14-DIP package with 2.54 mm pitch allowing easy breadboard prototyping, through-hole PCB assembly, and direct socket replacement of legacy logic ICs
- Low quiescent current CMOS process with 25 mA output drive capability, balancing power efficiency with the ability to drive multiple logic gate inputs
- Extended industrial temperature range of -40°C to +85°C supporting reliable operation in harsh environments and automotive auxiliary electronics
Applications
The CD74HCT4075EG4 is used in digital logic designs that require OR-gate functions with TTL-level input compatibility, such as interrupt-arbitration circuits, signal multiplexing, and bus-enable logic in microprocessor-based boards operating at 5 V. Its three independent gates support compact combinational logic implementations in industrial PLCs, relay-driver sequencers, and legacy-compatible control panels. The 14-DIP package also makes it the preferred choice for educational lab kits, prototype breadboards, and retrofit repairs in established production equipment.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HCT4075EG4:
Frequently Asked Questions
What logic family is CD74HCT4075EG4, and how does its input threshold compare with standard CMOS devices?
CD74HCT4075EG4 belongs to the HCT (High-Speed CMOS with TTL-compatible inputs) logic family. Its input switching threshold is approximately 1.2 V to 1.5 V, which matches TTL logic levels rather than the CMOS mid-supply threshold of 2.5 V at a 5 V rail. This makes it a direct drop-in replacement for TTL OR gates while consuming far less power — typically under 80 µA quiescent current compared to bipolar TTL devices.
What supply voltage and propagation delay specifications should designers expect from CD74HCT4075EG4?
The CD74HCT4075EG4 operates from a 4.5 V to 5.5 V supply. At 5 V, the typical propagation delay (tpd) is approximately 10 ns, with a maximum of 16 ns across the full temperature range of -40°C to +85°C. The output can source or sink up to 25 mA, enabling it to directly drive multiple CMOS inputs, LED indicators, or optocoupler inputs without a buffer stage.
How many independent OR gates does CD74HCT4075EG4 contain, and what input configuration does each gate have?
The CD74HCT4075EG4 contains 3 independent OR gates, each with 3 inputs, giving 9 total input pins available on the 14-DIP package. All inputs are TTL-threshold compatible with internal input-protection diodes clamped to VCC and GND. Each gate operates independently, allowing designers to use 1, 2, or all 3 gates in a single 14-pin IC to implement OR-logic conditions across multiple signal channels.
When is CD74HCT4075EG4 a better choice than a standard CMOS 74HC4075 for a 5 V logic board?
CD74HCT4075EG4 is preferred over the 74HC4075 whenever the board mixes 5 V TTL outputs (logic high ≥ 2.0 V, logic low ≤ 0.8 V) with CMOS logic, such as when interfacing older microprocessors, discrete TTL latches, or open-collector drivers. The HCT variant guarantees correct switching from TTL-level signals because its input low threshold is 0.8 V and input high threshold is 2.0 V, matching the TTL output spec exactly, whereas the HC variant may misread TTL high signals near 2.0 V to 2.5 V.
What package does CD74HCT4075EG4 come in, and how does the G4 suffix affect procurement?
The CD74HCT4075EG4 is housed in a 14-pin PDIP (dual in-line) package with 2.54 mm lead pitch and a body width of 7.62 mm, occupying approximately 19 mm × 8 mm of board space. The G4 suffix denotes Texas Instruments' tape-and-reel Green (Pb-free, halogen-free) packaging, so the device is fully RoHS compliant and ships in reels of 2500 units, or in tube form for lower-volume hand insertion.
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