SN74125N3 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN74125N3 is a TTL family quad bus buffer IC from Texas Instruments with active-low output enable control. It supports unidirectional 1-bit data driving with 50 pF load capacitance and 16 mA output current in a 14-Pin DIP package. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74125N3 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
- TTL/H/L family quad bus buffer with active-low enable control for flexible tri-state bus driving applications
- Supports 50 pF load capacitance with 16 mA maximum output low current for reliable logic level signal driving
- 14-Pin DIP (R-PDIP-T14) through-hole package enabling easy prototyping, breadboarding, and manual PCB assembly
- Unidirectional bus driver architecture simplifying data routing and isolation in TTL-level digital logic systems
Applications
The SN74125N3 is commonly used in microprocessor bus interfacing, data multiplexing, and memory address decoding circuits where tri-state bus control is needed to isolate or connect multiple TTL-level logic devices. It is well-suited for hobbyist projects, educational electronics labs, and legacy digital system maintenance where through-hole DIP packaging is preferred. The active-low enable control makes it straightforward to integrate into bus architectures requiring gated signal paths.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | TTL/H/L |
| JESD-30 Code | R-PDIP-T14 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.016A |
| Number of Bits | 1 |
| Number of Functions | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 54mA |
| Prop. Delay@Nom-Sup | 18ns |
| Propagation Delay (tpd) | 18ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| 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 SN74125N3:
Frequently Asked Questions
What logic family does the SN74125N3 belong to?
The SN74125N3 belongs to the TTL/H/L (Transistor-Transistor Logic) family, one of the foundational digital logic families widely used in legacy and hobbyist digital circuit designs, compatible with standard 5V TTL voltage levels and interfacing requirements.
How does the output enable work on the SN74125N3?
The SN74125N3 uses active-low enable control, meaning the output is active and driving when the enable pin is pulled low (logic 0), and the output goes to a high-impedance tri-state condition when the enable is high, allowing multiple drivers to share a common bus.
What is the maximum output current of the SN74125N3?
The SN74125N3 provides a maximum output low current (I(ol)) of 16 mA per channel, making it capable of directly driving standard TTL and CMOS loads with 50 pF maximum load capacitance per output without additional buffering.
What package does the SN74125N3 use?
The SN74125N3 is housed in a 14-Pin DIP (Dual Inline Package, R-PDIP-T14) through-hole package with 2.54 mm pin pitch, making it compatible with standard breadboards and through-hole PCB footprints, ideal for prototyping and educational applications.
Is the SN74125N3 lead-free and RoHS compliant?
The SN74125N3 has a Pb-free code of No, indicating it uses standard tin-lead solder finish rather than lead-free plating, which is relevant for legacy repair and maintenance applications but may not meet current RoHS requirements for new product designs.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 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.
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.”