SN74F125N Texas Instruments In Stock
SN74F125N is a quad 3-state buffer IC by Texas Instruments, featuring four independent buffers with active-low output-enable controls. Key specs: 4-channel 3-state outputs, 5V supply voltage, 74F-series high-speed logic. From $0.175, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $0.1750(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74F125N?
- Quad 3-State Buffer: Four independent buffer channels with individual active-low output-enable (OE) controls for flexible bus management
- High-Speed 74F Logic: Advanced Schottky technology delivers fast propagation delays for demanding digital logic applications
- 5V TTL Compatible: Fully compatible with standard TTL logic levels, enabling seamless integration in 5V digital systems
- Low Output Impedance: High-drive 3-state outputs allow multiple devices to share a common bus without signal contention
- Standard DIP-14 Package: Through-hole N-package for easy prototyping and legacy board compatibility
What is SN74F125N used for?
The SN74F125N is widely used in microprocessor and microcontroller bus interfacing, where its 3-state outputs allow multiple data sources to share a single bus line without conflict. It is also employed in memory address and data multiplexing, bidirectional data bus buffering, and signal isolation in industrial control and communication systems. Its TTL-compatible inputs and high-speed switching make it a reliable choice for both prototyping and production digital logic designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for SN74F125N?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the SN74F125N and what does it do?
The SN74F125N is a quad bus buffer gate with 3-state outputs from Texas Instruments. It contains four independent buffer channels, each controlled by an active-low output-enable (OE) pin. When OE is low, the output follows the input; when OE is high, the output is in a high-impedance state, allowing multiple devices to safely share a common data bus.
What are the key electrical specifications of the SN74F125N?
The SN74F125N operates on a 5V supply voltage and is based on 74F (Fast Schottky) logic technology. It features TTL-compatible input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), propagation delay of approximately 3.7ns, and output sink/source current of 64mA/15mA, making it suitable for high-speed bus driving applications.
What package does the SN74F125N come in and are there SMD alternatives?
The SN74F125N is housed in a 14-pin through-hole DIP (N) package, ideal for breadboarding and legacy designs. For surface-mount designs, Texas Instruments offers the SN74F125D (SOIC-14) and SN74F125PW (TSSOP-14) as functionally identical SMD alternatives with the same electrical characteristics.
What are typical applications for the SN74F125N?
The SN74F125N is commonly used in microprocessor data and address bus buffering, memory interface circuits, multi-master bus arbitration systems, and industrial control logic. Its 3-state outputs make it ideal wherever multiple signal sources must share a single transmission line, preventing bus contention.
Is the SN74F125N compatible with other logic families?
Yes, the SN74F125N is fully compatible with standard 5V TTL and LSTTL logic families. Its input thresholds and output drive levels meet TTL specifications, allowing direct interfacing with 74LS, 74S, and 74F series devices without level-shifting. It is not directly compatible with 3.3V CMOS logic without appropriate voltage translation.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3750 | $0.38 |
| 25+ | $0.2879 | $7.20 |
| 65+ | $0.2500 | $16.25 |
| 241+ | $0.1750 | $42.17 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”