CD74HCT27MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HCT27MG4 is a triple 3-input NOR gate from the HCT CMOS logic family operating at 5 V with 4 mA output drive and TTL-compatible inputs. Provides 3 independent NOR gates in a 14-pin SOIC package with 50 pF load capacitance. RoHS-compliant and available worldwide for standard digital logic interfacing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT27MG4 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 CD74HCT27MG4?
- Triple 3-input NOR gate with HCT TTL-compatible inputs enables direct interfacing with 5 V TTL and CMOS logic without level translation
- 4 mA output current (I_OL) drives standard bus loads and LED indicators directly from the 5 V rail in cost-sensitive logic designs
- 14-pin SOIC package (JESD-30 R-PDSO-G14) with 50 pF load capacitance supports high-density PCB layouts with minimal board area
What is CD74HCT27MG4 used for?
CD74HCT27MG4 is used in combinational logic circuits requiring 3-input NOR functions for address decoding, interrupt arbitration, and control signal generation in 5 V digital systems. Its HCT family TTL-compatible inputs allow seamless interfacing between older TTL logic boards and modern CMOS systems operating at 5 V. Industrial PLCs, embedded controllers, and FPGA peripheral glue logic benefit from its triple gate configuration, reducing IC count and simplifying board-level design.
What are the specifications of CD74HCT27MG4?
| Pbfree Code | Yes |
| 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 | 3 |
| Number of Inputs | 3 |
| 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) | 50mA |
| Prop. Delay@Nom-Sup | 35ns |
| Propagation Delay (tpd) | 35ns |
| 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 |
Where can I find the CD74HCT27MG4 datasheet?
CD74HCT27MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT27MG4?
Compatible alternatives and drop-in replacements for CD74HCT27MG4:
Frequently Asked Questions
What is the output drive strength and supply voltage of CD74HCT27MG4 for bus driving applications?
CD74HCT27MG4 provides a maximum output low current (I_OL) of 4 mA at 5 V supply voltage, sufficient to drive standard CMOS and TTL inputs on a common bus. Its HCT family logic levels are TTL-compatible, meaning logic-high input thresholds match 5 V TTL outputs directly. The 50 pF load capacitance rating ensures stable output switching into typical PCB trace loads without excessive signal degradation.
How does the HCT family of CD74HCT27MG4 differ from HC-family NOR gates when interfacing with TTL logic?
The HCT family uses TTL-compatible input thresholds (V_IH min = 2.0 V, V_IL max = 0.8 V), identical to standard 5 V TTL logic families like 74LS and 74AS. Standard HC-family CMOS gates require input levels close to 50% of VCC, which can cause unreliable switching when driven by TTL outputs that may only swing to 2.4 V logic-high. CD74HCT27MG4 therefore eliminates level-translation glue circuits in mixed TTL-CMOS 5 V systems.
For a CPLD or microcontroller glue logic design, how many NOR functions does CD74HCT27MG4 provide per package?
CD74HCT27MG4 provides 3 independent 3-input NOR gates in a single 14-pin SOIC package, each with its own 3 inputs and 1 output — 9 input pins and 3 output pins in total. This allows a single IC to implement 3 separate combinational logic terms such as address decode conditions, chip-select generation, or interrupt enable masking in embedded system designs. Adding a second device doubles the gate count to 6 NOR functions, covering most small glue-logic requirements.
Is CD74HCT27MG4 a long-term supply option, and what certifications does it carry?
CD74HCT27MG4 is Pb-free and RoHS-compliant per JESD-609 e4, making it suitable for CE-marked and RoHS-certified end products. However, its YTEOL is listed as 0, suggesting potential end-of-product-life status, and procurement teams should verify current stock and consider pin-compatible alternatives such as 74HCT27 from other manufacturers in the same 14-pin SOIC footprint. The MG4 suffix indicates a standard-grade commercial temperature range part.
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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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