CD74HC251MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD74HC251MG4 is a single 8-input CMOS data selector and multiplexer from Texas Instruments, providing three-state single output with 1-of-8 selection based on a 3-bit address, in a 16-pin SOIC package. It belongs to the HC/UH logic family and supports 4mA output drive with 50pF load capacity. Suitable for bus multiplexing and data routing in low-power CMOS digital designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC251MG4 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
- 8-to-1 multiplexer with 3-bit binary address (A, B, C) for selecting one of eight data inputs
- Three-state Y output with active-LOW output enable for bus-sharing configurations
- 4mA output drive current for standard CMOS bus driving applications
- HC/UH CMOS family with 2V to 6V VCC for broad supply voltage compatibility
- Single Y output with 50pF load capacitance support
- 16-pin SOIC package for surface-mount assembly in compact digital designs
Applications
The CD74HC251MG4 is used in digital data multiplexing, microprocessor port expansion, and signal routing in embedded systems, programmable logic controllers, and industrial digital logic designs. It also serves in address-based channel selection for sensor arrays, memory bank switching, and function generation circuits where selecting one of eight data sources in a small package is required.
Specifications
| YTEOL | 0 |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| 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 | SOP16,.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 | 53ns |
| Propagation Delay (tpd) | 370ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the function of the CD74HC251MG4?
The CD74HC251MG4 is an 8-to-1 data selector and multiplexer. A 3-bit binary address selects which of the eight data inputs (D0 to D7) is routed to the Y output. The active-LOW strobe input enables or disables the output, placing it in high-impedance state when de-asserted for bus-sharing applications.
What is the supply voltage range for the CD74HC251MG4?
The CD74HC251MG4 operates from a supply voltage of 2V to 6V, making it compatible with 3.3V CMOS microcontrollers and 5V TTL-compatible systems alike. The HC family provides good noise immunity at all supply voltages within this range.
How does the three-state output of the CD74HC251MG4 work?
When the active-LOW output enable (OE-bar) is asserted LOW, the selected input signal is driven to the Y output. When OE-bar is HIGH, the Y output enters a high-impedance (floating) state, effectively disconnecting the device from the bus and allowing other devices to drive the same line without conflict.
What package does the CD74HC251MG4 use?
The CD74HC251MG4 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) surface-mount package, which is compatible with standard automated PCB assembly processes and widely used in industrial, commercial, and consumer digital electronics designs.
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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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