SN74LS125ANE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74LS125ANE4 is a quad bus buffer with 3-state outputs in a 14-pin DIP package, providing four independent active-low-enabled buffer channels. It operates from a 4.75 V to 5.25 V supply with 24 mA sink current, suitable for TTL bus driving and signal isolation in logic systems.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS125ANE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LS125ANE4?
- Quad-channel bus buffer with independent active-low 3-state enables
- TTL-compatible operating supply of 4.75 V to 5.25 V
- 24 mA output sink current with 45 pF load capacitance rating
- Unidirectional signal path suitable for bus-isolation applications
- 14-pin PDIP package for easy prototyping and through-hole assembly
- LS-family TTL logic with standard propagation delay characteristics
What is SN74LS125ANE4 used for?
The SN74LS125ANE4 is used in microprocessor-based systems to buffer and isolate address or data bus signals, preventing bus contention when multiple devices share a common line. It suits backplane driver circuits, memory bank selection, and legacy TTL system designs where 5 V bus driving with 3-state control is required. Prototyping boards and through-hole industrial control systems also rely on it for dependable signal buffering.
What are the specifications of SN74LS125ANE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDIP-T14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| 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 |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 20mA |
| 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 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 |
Where can I find the SN74LS125ANE4 datasheet?
SN74LS125ANE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS125ANE4?
Compatible alternatives and drop-in replacements for SN74LS125ANE4:
Frequently Asked Questions
How many buffer channels does the SN74LS125ANE4 provide and how is each one enabled?
The SN74LS125ANE4 contains 4 independent buffer channels, each controlled by a separate active-low output-enable pin. When an enable pin is driven high, that channel's output enters the high-impedance 3-state, allowing safe sharing of a common 5 V bus line without contention between multiple drivers.
What output current can the SN74LS125ANE4 sink, and what is the rated load capacitance?
Each output can sink up to 24 mA of current and is rated for a load capacitance of 45 pF. These parameters make the device capable of reliably driving standard TTL bus lines at 5 V while meeting timing margins for typical LS-family propagation delay specifications.
For which legacy or prototype board designs is the DIP package particularly useful?
The 14-pin PDIP package is especially useful for breadboard prototyping and through-hole PCB designs where surface-mount soldering is not practical. Many legacy industrial controllers and educational development boards specify through-hole 74LS-series ICs operating at 5 V, and the SN74LS125ANE4 fits directly into standard 0.3-inch DIP sockets.
How does the SN74LS125ANE4 compare to the SN74HC125 for modern 5 V designs?
Both are quad 3-state bus buffers in 14-pin packages operating at 5 V, but the 74HC125 draws significantly less supply current due to CMOS technology. The SN74LS125ANE4 uses bipolar TTL logic with a 24 mA sink capability that maintains compatibility with legacy LS-series logic levels, whereas the 74HC125 offers faster switching and lower quiescent current at the cost of slightly different input threshold voltages.
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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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