CD74HCT02ME4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HCT02ME4 is a quad 2-input NOR gate from the high-speed CMOS HCT logic family, compatible with TTL voltage levels and 50 pF load capacitance. It provides 4 independent NOR functions in a 14-pin SOIC package with 4 mA output drive current. Available from global stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT02ME4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HCT02ME4?
- HCT family CMOS logic accepts TTL-level inputs (VIH = 2 V minimum), enabling direct interfacing between 5 V TTL and CMOS logic without level-shift circuits
- Quad 2-input NOR gates provide 4 independent logic functions in a single 14-pin SOIC package, minimizing component count in glue logic designs
- 50 pF rated load capacitance and 4 mA output drive support standard bus fan-out requirements at CMOS switching speeds
- Wide operating temperature range and plastic SOIC package support industrial and consumer applications with reliable high-speed CMOS performance
What is CD74HCT02ME4 used for?
The CD74HCT02ME4 is commonly used as a logic glue device on digital control boards where TTL-compatible inputs must drive CMOS outputs, such as in legacy system interface cards, microcontroller peripheral decoders, and programmable logic support circuits. Industrial controllers and embedded processor boards use its quad NOR functions for address decoding, interrupt logic, and signal enable/disable gating where small 14-pin SOIC packages help minimize PCB area. Consumer electronics assemblies, including set-top boxes and home appliance control boards, also rely on HCT series gates for cost-effective combinational logic in 5 V systems.
What are the specifications of CD74HCT02ME4?
| YTEOL | 0 |
| Family | HCT |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | NOR GATE |
| Max I(ol) | 0.004A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 32ns |
| Propagation Delay (tpd) | 32ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the CD74HCT02ME4 datasheet?
CD74HCT02ME4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT02ME4?
Compatible alternatives and drop-in replacements for CD74HCT02ME4:
Frequently Asked Questions
How does the HCT family input threshold of the CD74HCT02ME4 enable interfacing between TTL and CMOS logic systems?
The HCT family sets VIH (minimum high-level input voltage) at 2 V and VIL (maximum low-level input voltage) at 0.8 V, matching standard TTL output swing specifications. This allows the CD74HCT02ME4 to accept signals directly from 74LS or 74AS TTL gates operating at 5 V without level-shift resistor networks or dedicated translator ICs.
What output drive current does the CD74HCT02ME4 provide and how many loads can it drive?
The CD74HCT02ME4 provides 4 mA maximum low-level output current (IOL) per gate output. At standard CMOS input load currents of approximately 1 µA, each output can theoretically fan out to hundreds of CMOS inputs; however, 50 pF load capacitance per output limits practical fan-out to 10 to 20 standard loads before propagation delay increases significantly.
In which combinational logic configurations can the 4 NOR gates of the CD74HCT02ME4 implement other Boolean functions?
NOR gates are functionally complete, meaning any Boolean function can be synthesized using only NOR gates. With 4 available gates, designers can implement NOT (1 NOR gate used as inverter), AND (3 NOR gates), and OR (2 NOR gates) functions. A full NAND equivalent requires 4 NOR gates, making this single IC capable of building 2-input NAND or AND functions for address decoding and enable logic.
How does the 14-pin SOIC package of the CD74HCT02ME4 compare to DIP packaging for modern PCB designs?
The 14-pin SOIC measures approximately 8.65 mm x 3.9 mm, roughly 40% smaller in board area than the equivalent 14-pin DIP package at 19.05 mm x 6.35 mm. Surface-mount SOIC assembly is also faster on automated lines, reducing placement cost per part and eliminating through-hole drilling, which lowers PCB fabrication cost for high-volume production runs.
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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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