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Texas Instruments SN74LV125ATNS
- Part No.:
- SN74LV125ATNS
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV125ATNS.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
SN74LV125ATNS from Texas Instruments is a quadruple 3-state bus buffer gate with TTL-compatible inputs, operating from 4.5 V to 5.5 V, delivering 3.8 ns typical propagation delay at 5 V, and supporting mixed-mode voltage operation across all ports for use in level-translating data buses in industrial control and embedded communication interfaces.
For engineers reviewing the SN74LV125ATNS datasheet, SN74LV125ATNS pinout, SN74LV125ATNS application, or SN74LV125ATNS equivalent, this page provides verified functional identity, validated SOIC-14 package mapping, confirmed 3-state output behavior, Ioff-enabled partial-power-down support, and real-world interface design context for bus isolation and signal routing in mixed-voltage systems.
Technical Context
The SN74LV125ATNS implements four independent non-inverting buffers, each with an active-low 3-state output-enable (OE) input that places the corresponding Y output in high-impedance when asserted. Its logic function table confirms strict L/H/Z output states per channel without internal feedback or latching.
It features Ioff circuitry that disables all outputs and limits input/output leakage to ≤5 µA during power-down, enabling safe back-drive prevention in partial-power-down systems. Input thresholds are TTL-compatible (VIL ≤ 0.8 V, VIH ≥ 2 V), and output drive capability is ±16 mA at VCC = 4.5–5.5 V with guaranteed VOL ≤ 0.55 V and VOH ≥ 3.8 V under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V logic rails and tolerance against supply ripple. |
| tpd (Typical) | 3.8 ns at 5 V, CL = 15 pF - Enables high-speed bus buffering in timing-critical digital interfaces up to ~100 MHz. |
| Ioff Leakage | ≤5 µA at 0–5.5 V - Guarantees safe isolation during system power sequencing without damaging current backflow. |
| Output Drive | ±16 mA - Supports direct connection to standard CMOS/TTL loads without external pull-ups or buffers. |
| Input Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - Allows seamless interfacing with legacy 5-V TTL outputs without level shifters. |
| Operating Temp | –40°C to +125°C - Qualified for extended industrial and automotive under-hood environments. |
| ESD Rating | ±2000 V HBM - Meets JEDEC JS-001 for robust handling in automated assembly and field service. |
Pinout & Package
SN74LV125ATNS is packaged in a 14-pin SOIC (NS) package measuring 10.20 mm × 7.8 mm, with standard gull-wing leads and 1.27 mm pitch. The body height is ≤1.75 mm, and the device uses Pb-free NiPdAu lead finish compliant with RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE1–OE4 | Active-low 3-state enable inputs - Asserting high disables respective Y output into high-Z state. |
| 2, 5, 9, 12 | A1–A4 | Buffer input terminals - Accept TTL-compatible logic signals and drive corresponding Y outputs. |
| 3, 6, 8, 11 | Y1–Y4 | Non-inverting 3-state outputs - Deliver buffered A-input signal when OE is low; high-Z otherwise. |
| 7 | GND | Ground reference - Must be connected to system ground plane for noise immunity and correct logic thresholds. |
| 14 | VCC | Power supply - Requires stable 4.5–5.5 V rail with local 0.1 µF decoupling capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Allows A-inputs and Y-outputs to interface across different voltage domains (e.g., 3.3-V logic driving 5-V bus) without damage or level-shifting components. |
| Ioff partial-power-down support | Prevents current backflow when VCC = 0 V, enabling hot-plug and power-gated subsystem designs in modular electronics. |
| Low ground bounce (VOLP < 0.8 V) | Reduces switching noise coupling into shared ground paths, critical for signal integrity in dense PCB layouts. |
| High noise immunity (VOHV > 2.3 V) | Ensures reliable high-level recognition despite transient undershoot on output lines during fast edge transitions. |
| Latch-up immunity > 250 mA | Exceeds JESD17 requirements, eliminating risk of destructive latch-up under ESD or overvoltage stress conditions. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Isolation |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy 5-V CAN/LIN transceiver buses while maintaining bidirectional signal routing capability. IC Role / Device Role / Timing Role: Quad 3-state buffer providing direction-controlled, low-latency signal pass-through between MCU and peripheral ICs. Use Value: Enables clean separation of power domains and prevents bus contention during MCU reset or sleep modes using OE control. |
Use Scenario: Buffering sensor data lines (e.g., temperature, door status) before multiplexing onto a central diagnostic bus in vehicle ECUs. IC Role / Device Role / Timing Role: Level-tolerant bus driver ensuring TTL-compatible inputs reliably drive 5-V bus loads with minimal skew. Use Value: Eliminates need for discrete level shifters while sustaining <3.8 ns propagation delay for time-sensitive status updates. |
| Embedded Test Equipment Signal Routing | Legacy Instrumentation Digital I/O Expansion |
Use Scenario: Dynamically reconfiguring FPGA I/O banks to drive multiple instrument peripherals via shared 5-V data lanes. IC Role / Device Role / Timing Role: Programmable bus gate enabling FPGA to selectively enable/disable connections to DUT interfaces. Use Value: Provides deterministic 3-state control with <5.5 ns max tpd across –40°C to +125°C for repeatable test timing. |
Use Scenario: Expanding parallel digital I/O on aging industrial controllers using spare GPIO headers and ribbon-cable interconnects. IC Role / Device Role / Timing Role: Robust TTL-compatible buffer adding four additional driven outputs with high noise margin. Use Value: Delivers ±16 mA drive strength and 0.55 V max VOL to ensure reliable logic-low assertion across long cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Operates at 1.65–3.6 V only; no 5-V tolerance; lower drive (±24 mA), faster tpd (2.5 ns @ 3.3 V). | Requires 3.3-V-only systems; unsuitable for mixed 5-V/TTL environments where SN74LV125ATNS excels. | Select when full 5-V operation is unnecessary and lower supply voltage reduces system power. |
| 74ACT125M | Higher drive (±24 mA), faster tpd (3.0 ns @ 5 V), but no Ioff and only rated to 85°C ambient. | Lacks partial-power-down protection; not qualified for extended temperature industrial use cases. | Choose only for commercial-temp, high-speed 5-V systems where Ioff and 125°C operation are not required. |
Compared with SN74LVC125APWR and 74ACT125M, SN74LV125ATNS uniquely combines 5-V operation, Ioff-enabled power sequencing, and extended temperature range-making it the sole option among the three qualified for industrial bus isolation with hot-swap safety.
Availability
SN74LV125ATNS is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, embedded test equipment signal routing, and legacy instrumentation digital I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LV125ATNS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in high-reliability logic and interface solutions.
The SN74LV125ATNS belongs to TI's LV family of low-voltage, 5-V tolerant logic devices designed specifically for robust, mixed-signal industrial and automotive bus interface applications requiring wide temperature range and power sequencing safety.
FAQ
What is the logic function of the SN74LV125ATNS?
The SN74LV125ATNS implements four independent non-inverting bus buffers, each with an active-low 3-state output-enable (OE) input. When OE is low, the Y output follows the A input; when OE is high, Y enters high-impedance. This behavior is confirmed in the device functional modes section and function table of the official datasheet SCES629B.
Does the SN74LV125ATNS support partial-power-down operation?
Yes, the SN74LV125ATNS includes Ioff circuitry that disables outputs and limits input/output leakage to ≤5 µA when powered down, preventing damaging current backflow. This feature is explicitly documented in Section 1 (Features) and Section 7.1 (Overview) of the SN74LV125AT datasheet.
What package type is used for the SN74LV125ATNS?
The SN74LV125ATNS uses a 14-pin SOIC (NS) package measuring 10.20 mm × 7.8 mm, with 1.27 mm lead pitch and ≤1.75 mm height. This is confirmed in the Package Information table and Mechanical, Packaging, and Orderable Information section of the official TI datasheet.
Can the SN74LV125ATNS interface between 3.3-V and 5-V logic domains?
Yes, the SN74LV125ATNS supports mixed-mode voltage operation: its inputs accept 3.3-V logic levels while its outputs drive 5-V buses, and it tolerates input voltages up to 5.5 V. This capability is explicitly stated in the Features list and Section 7.1 of the datasheet.
What is the maximum operating temperature for the SN74LV125ATNS?
The SN74LV125ATNS is rated for operation from –40°C to +125°C, as specified in Section 5.3 (Recommended Operating Conditions) of the TI datasheet SCES629B. This extended temperature range qualifies it for under-hood automotive and harsh industrial environments.
SN74LV125ATNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
SN74LV125ATNS FAQ
1.How can I place an order for SN74LV125ATNS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATNS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LV125ATNS reliable?
The price and inventory of SN74LV125ATNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATNS is usually 5 days.
3.What payment methods are accepted for SN74LV125ATNS?
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4.How is shipping managed for SN74LV125ATNS?
SN74LV125ATNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATNS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LV125ATNS?
For technical support, including SN74LV125ATNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATNS requirements.
6.How does Aetrix verify that SN74LV125ATNS is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATNS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LV125ATNS meets industry standards.
7.What is the process for return or replacement of SN74LV125ATNS?
All SN74LV125ATNS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATNS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LV125ATNS part is unused and in its original packaging.
Return procedure for SN74LV125ATNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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