SN74F257NSR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74F257NSR is a quad 2-to-1 data selector and multiplexer with 3-state outputs from Texas Instruments, part of the advanced F/FAST logic family. It features four independent channels in a 16-pin SOIC package with 50pF load capacitance and 20mA output sink current. Available from global distributors in stock with fast worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74F257NSR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Quad 2-to-1 multiplexer architecture provides four independent data selection channels in a single 16-pin IC
- 3-state output capability enables bus-oriented applications and direct connection to shared data buses
- F/FAST logic family delivers high-speed switching performance with low propagation delay
- Pb-free 16-pin SOIC (R-PDSO-G16) package with 50pF load capacitance for reliable PCB integration
Applications
The SN74F257NSR is used in data routing, bus multiplexing, and digital switching applications where two sources need to share a common output bus. It is well suited for memory address selection, microprocessor data bus management, and programmable logic systems requiring high-speed 2-to-1 signal routing. Communications equipment, computing systems, and industrial controllers benefit from its quad-channel architecture and 3-state bus compatibility.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | F/FAST |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.02A |
| Number of Bits | 4 |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Number of Outputs | 1 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 20mA |
| Prop. Delay@Nom-Sup | 7ns |
| Propagation Delay (tpd) | 7ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| 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 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74F257NSR:
Multiplexer, F/FAST Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDSO16
Multiplexer, F/FAST Series, 4-Func, 2 Line Input, 1 Line Output, Inverted Output, TTL, PDSO16
Frequently Asked Questions
What are the key specifications of the SN74F257NSR?
The SN74F257NSR is a quad 2-to-1 multiplexer with 3-state outputs in the F/FAST logic family, featuring 4 bits, a 50pF load capacitance rating, 20mA maximum output low current (IOL), housed in a 16-pin SOIC (R-PDSO-G16) package, and operates with standard 5V TTL logic supply voltage.
What applications is the SN74F257NSR designed for?
This device is designed for bus multiplexing, data routing, memory address selection, and microprocessor interface circuits where two data sources must share a single output bus. The 3-state outputs allow multiple devices to drive common buses without bus contention, making it ideal for computing, telecommunications, and industrial control systems.
What package does the SN74F257NSR use and is it RoHS compliant?
The SN74F257NSR is housed in a 16-pin Small Outline IC (SOIC) package with JEDEC code R-PDSO-G16, suitable for surface-mount assembly. It is Pb-free with JESD-609 Code e4 designation, confirming full RoHS compliance and lead-free solder compatibility for environmentally conscious manufacturing processes.
How does the SN74F257NSR differ from standard 74257 multiplexers?
The SN74F257NSR belongs to the F/FAST logic subfamily, which offers faster propagation delay and higher drive capability compared to standard LS or HC logic variants. With a 20mA sink current (IOL) and 50pF load capacitance, it is optimized for high-speed backplane and bus-driving applications where timing margins are critical.
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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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