CD74HCT251EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HCT251EE4 is a single 8:1 multiplexer IC from Texas Instruments in a 16-Pin PDIP package. Features HCT logic family with 50pF load capacitance, 4mA output current, and 8 data inputs. Ideal for digital signal routing in embedded systems, data acquisition, and logic design applications worldwide.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT251EE4 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
- Single 8:1 multiplexer with 8 data inputs and 1 output for flexible signal routing
- HCT logic family ensures TTL-compatible input levels with CMOS output drive strength
- 50pF load capacitance support enables reliable operation in high-capacitance environments
- 16-Pin PDIP package for easy through-hole PCB assembly and prototyping
- RoHS compliant (e4/Pb-free) meeting global environmental regulations
Applications
The CD74HCT251EE4 is widely used in digital signal routing and data selection applications such as microcontroller I/O expansion, data acquisition systems, and bus multiplexing in embedded designs. Its HCT logic compatibility makes it ideal for interfacing between TTL and CMOS logic families in industrial control and communication equipment. The device is also commonly applied in test and measurement instrumentation, programmable logic systems, and general-purpose digital switching circuits.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | HCT |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.004A |
| Number of Functions | 1 |
| Number of Inputs | 8 |
| Number of Outputs | 1 |
| Output Characteristics | 3-STATE |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 50mA |
| Prop. Delay@Nom-Sup | 53ns |
| Propagation Delay (tpd) | 63ns |
| Qualification Status | Not Qualified |
| 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 | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HCT251EE4:
Multiplexer, HCT Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, CMOS, PDIP16
Frequently Asked Questions
What is the CD74HCT251EE4 and what does it do?
The CD74HCT251EE4 is a single 8:1 multiplexer IC from Texas Instruments. It selects one of 8 data inputs and routes it to a single output based on 3 select lines, making it ideal for signal routing, data selection, and bus expansion in digital logic circuits.
What logic family does the CD74HCT251EE4 belong to and what are its key electrical parameters?
The CD74HCT251EE4 belongs to the HCT logic family, which is TTL-compatible with CMOS output drive. Key parameters include a maximum output low current (I(ol)) of 4mA, a load capacitance (CL) of 50pF, and it operates with standard 5V TTL-compatible input thresholds.
What package does the CD74HCT251EE4 come in and is it RoHS compliant?
The CD74HCT251EE4 comes in a 16-Pin PDIP (Dual-In-Line Package) through-hole package, suitable for breadboarding and PCB prototyping. It is fully RoHS compliant, designated by the 'e4' JESD-609 code indicating it is lead-free (Pb-free).
What are typical applications for the CD74HCT251EE4?
Typical applications include microcontroller I/O expansion, data bus multiplexing, digital signal routing in embedded systems, TTL-to-CMOS interfacing, data acquisition front-ends, industrial control systems, and test equipment where selecting among multiple data sources is required.
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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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