CD54HCT27F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54HCT27F3A is a triple 3-input NOR gate from Texas Instruments in the HCT CMOS logic family, offering three independent NOR gate functions with TTL-compatible inputs. It operates with a 50pF load capacitance and is housed in a 14-pin ceramic DIP package, making it suitable for military-range logic applications requiring reliable NOR logic in high-reliability environments.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD54HCT27F3A 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
Key Features
- Triple 3-input NOR gate with three independent logic functions
- HCT logic family: CMOS operation with TTL-compatible input thresholds
- 50pF load capacitance for driving standard logic interface loads
- 14-pin ceramic DIP package for hermetically sealed high-reliability use
- Lead-free construction (Pb-free code: Yes)
- Wide operating temperature range suitable for military/industrial use
Applications
The CD54HCT27F3A is used in combinational logic design, signal gating, and boolean function implementation in military-grade and high-reliability electronic systems. It is commonly employed in digital control circuits, address decoding, and logic level interfacing where TTL-compatible NOR gate functions are required in harsh-environment or extended-temperature-range embedded applications.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | HCT |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| 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 | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 35ns |
| Propagation Delay (tpd) | 35ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many NOR gate channels does the CD54HCT27F3A contain?
The CD54HCT27F3A contains three independent 3-input NOR gate channels, all housed in a single 14-pin package. Each gate accepts three logic inputs and produces a NOR output — logic HIGH only when all three inputs are LOW. The three gates operate independently with no interaction between channels.
What logic family does the CD54HCT27F3A belong to?
The CD54HCT27F3A belongs to the HCT (High-Speed CMOS with TTL inputs) logic family. HCT devices combine CMOS low-power consumption with TTL-compatible input voltage thresholds, making them directly interoperable with TTL logic families. They operate from a 5V supply and provide robust noise margins for reliable digital logic operation.
What package does the CD54HCT27F3A use and why is it significant?
The CD54HCT27F3A is housed in a 14-pin ceramic DIP (CDIP) package designated by JESD-30 code R-GDIP-T14. The ceramic hermetic package provides superior environmental protection against moisture, contaminants, and mechanical stress compared to plastic packages, making it the preferred choice for military, aerospace, and high-reliability industrial applications with strict environmental requirements.
Is the CD54HCT27F3A lead-free and environmentally compliant?
Yes, the CD54HCT27F3A has a Pb-free code indicating lead-free construction. However, its JESD-609 code is 'e0', which covers ceramic hermetic packages that are inherently compatible with high-temperature soldering processes. The device meets applicable RoHS exemptions for ceramic-packaged components used in military and high-reliability applications.
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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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