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Texas Instruments SN74LV125APWR
- Part No.:
- SN74LV125APWR
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV125APWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:28,713
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Product details
Overview
SN74LV125APWR from Texas Instruments is a quadruple 3-state bus buffer gate designed for voltage-level translation and bidirectional bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers ≤5.5 ns propagation delay at 5 V, supports 5.5-V-tolerant inputs, features Ioff partial-power-down protection, and is qualified for industrial temperature range (–40°C to 125°C). It is used in SSD controller interfaces and PoE power management subsystems.
For engineers reviewing the SN74LV125APWR datasheet, SN74LV125APWR pinout, SN74LV125APWR application, or SN74LV125APWR equivalent, this page provides verified functional identity, TSSOP-14 package mapping, confirmed 3-state buffer behavior, real-world noise immunity specs (VOLP < 0.8 V, VOHV > 2.3 V at 3.3 V), and validated alternatives for bus interface redesign.
Technical Context
The SN74LV125APWR implements four independent noninverting buffers, each with an active-low 3-state output enable (OE) controlling high-impedance output release. Its CMOS design enables mixed-mode voltage operation: inputs tolerate up to 5.5 V regardless of VCC, allowing down-translation from 5-V logic to 3.3-V or 2.5-V buses.
It integrates Ioff circuitry that disables all outputs and blocks current flow when VCC = 0 V, supporting live insertion and hot-swap scenarios. Latch-up immunity exceeds 250 mA per JESD 17, and ESD robustness meets 4000-V HBM, 200-V MM, and 2000-V CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - Enables single-supply operation across 2.5-V, 3.3-V, and 5-V logic domains without level shifters. |
| tpd (max) | 5.5 ns at VCC = 5 V - Ensures fast signal routing in timing-critical data paths like SSD command buses. |
| Input Voltage Tolerance | Up to 5.5 V - Allows interfacing 5-V microcontrollers to 3.3-V peripherals without external clamping or resistors. |
| Ioff | ≤5 µA at VCC = 0 V - Prevents back-driving and leakage during partial power-down in modular systems. |
| Output Drive | ±16 mA at VCC = 4.5–5.5 V - Sufficient to drive 15-pF loads with controlled edge rates, minimizing ringing on PCB traces. |
| Operating Temperature | –40°C to 125°C - Qualified for industrial and extended-temperature embedded applications including motor drives and PLCs. |
| ESD Rating (HBM) | ±4000 V - Meets IEC 61000-4-2 system-level robustness requirements for field-deployable equipment. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, thin-profile surface-mount construction optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable controls - Each independently places its associated buffer output into high-impedance state. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Buffer input terminals - Accept 5.5-V-tolerant signals; no level-shifting required when VCC < 5.5 V. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Noninverting buffered outputs - Drive loads up to ±16 mA while maintaining rail-to-rail VOH/VOL under specified conditions. |
| 7 | GND | Ground reference - Must be connected to system ground plane; decoupling capacitor recommended adjacent to pin. |
| 14 | VCC | Power supply - Requires local 0.1-µF ceramic bypass capacitor; supports 2–5.5 V operation with stable regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept 0–5.5 V independent of VCC, enabling seamless 5-V-to-3.3-V down-translation without external components. |
| Ioff partial-power-down support | Blocks current flow between powered and unpowered sections, preventing damage during hot-plug events in modular backplanes. |
| Low dynamic ground bounce (VOLP) | <0.8 V at VCC = 3.3 V - Reduces simultaneous switching noise, critical for stable ADC reference and analog subsystems. |
| Controlled output edge rates | Δt/Δv ≥ 20 ns/V at 5 V - Limits EMI generation and overshoot on unterminated transmission lines in compact layouts. |
| Latch-up immunity | >250 mA per JESD 17 - Guarantees robustness against transient overcurrent events in noisy industrial environments. |
Applications
| Flow Meters | Solid State Drives (SSDs) |
|---|---|
|
Use Scenario: Digital pulse counting and sensor signal conditioning in ultrasonic or magnetic flow meters operating in harsh industrial settings. IC Role / Device Role / Timing Role: Bus buffer isolating microcontroller GPIOs from isolated sensor front-end ICs while translating 5-V encoder pulses to 3.3-V MCU logic levels. Use Value: Ioff prevents back-drive during sensor module power cycling; 125°C rating ensures reliability near motor-driven meter housings. |
Use Scenario: Interfacing host controller (e.g., ARM SoC) to NAND flash arrays and PCIe/SATA PHYs in enterprise SSDs. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer for command/address buses between controller and memory interface, reducing crosstalk-induced bit errors. Use Value: 5.5-V-tolerant inputs allow direct connection to legacy 5-V test fixtures; low VOLP minimizes noise coupling into sensitive flash timing margins. |
| Power Over Ethernet (PoE) | Programmable Logic Controllers |
|
Use Scenario: Isolating control logic (e.g., PD controller state machine) from high-noise 48-V DC power delivery circuitry in PoE-powered devices. IC Role / Device Role / Timing Role: 3-state buffer enabling bidirectional communication between isolated MCU and PoE interface ICs via optocoupler or digital isolator bridges. Use Value: Independent OE pins allow precise timing control of data direction transitions; HBM 4000-V rating withstands surge transients on Ethernet ports. |
Use Scenario: Signal conditioning and voltage translation between 24-V field I/O modules and 3.3-V programmable logic core in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Level-shifting buffer for discrete input scanning and output drive enable lines, ensuring clean logic thresholds despite long cable runs. Use Value: Wide VCC range accommodates auxiliary 5-V rails; –40°C to 125°C operation sustains performance in uncooled control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Lower VCC min (1.65 V), faster tpd (3.7 ns @ 3.3 V), but only 3.6-V input tolerance - not 5.5-V tolerant. | Best suited for pure 3.3-V or dual-supply 1.8/3.3-V systems; unsuitable where 5-V inputs must be accepted without external clamping. | Select when full 5-V input tolerance is unnecessary and lower supply voltage or higher speed is prioritized. |
| 74LVX125M | Same 2–3.6-V VCC range and 5.5-V input tolerance, but SOIC-14 only; slightly higher tpd (7.5 ns @ 3.3 V). | Compatible for cost-sensitive industrial designs using through-hole or legacy SOIC footprints; lacks TSSOP density advantage. | Choose for board-level compatibility with existing SOIC layouts or where thermal dissipation favors larger package. |
Compared with SN74LV125APWR, SN74LVC125APW trades 5.5-V input tolerance for lower voltage operation and speed, while 74LVX125M matches voltage specs but sacrifices package miniaturization and propagation delay performance.
Availability
SN74LV125APWR is available at Aetrix Electronics and suitable for industrial automation, enterprise storage, and PoE infrastructure requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LV125APWR 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 expertise in logic IC design and industrial-grade qualification.
The SN74LV125A product line delivers robust, low-power bus interface solutions for mixed-voltage systems in automotive, industrial, and communications infrastructure - engineered for signal integrity, thermal resilience, and long-term supply stability.
FAQ
What is the maximum input voltage the SN74LV125APWR can safely accept?
The SN74LV125APWR accepts input voltages up to 5.5 V on any pin, regardless of VCC level - a key feature enabling direct interfacing with 5-V logic while powered from 3.3 V or 2.5 V. This eliminates need for external level-shifting components and is explicitly specified in Section 6.1 Absolute Maximum Ratings and Section 6.3 Recommended Operating Conditions of the TI datasheet SCES124O.
Does the SN74LV125APWR support partial power-down mode?
Yes, the SN74LV125APWR includes Ioff circuitry that actively disables all outputs and blocks current flow when VCC = 0 V, supporting safe partial power-down and live insertion. Per Section 1 Features and Section 8.3 Feature Description, Ioff is ≤5 µA across –40°C to 125°C, ensuring no back-drive into unpowered system sections.
What is the typical propagation delay of the SN74LV125APWR at 3.3 V supply?
At VCC = 3.3 V with 15-pF load, the SN74LV125APWR exhibits typical propagation delay (tpd) of 4.8 ns and maximum of 11 ns over –40°C to 125°C, as documented in Section 6.7 Switching Characteristics. This performance enables reliable use in high-speed data paths such as SSD command buses and PLC scan cycles.
Is the SN74LV125APWR pin-compatible with other members of the SN74LV125A family?
Yes - all SN74LV125A variants, including SN74LV125APWR, share identical pin configuration and function mapping per the Pin Functions table in Section 5 of SCES124O. The TSSOP-14 (PW) package maintains mechanical and electrical compatibility with other 14-pin variants like SOIC (D) and SSOP (DB), though layout and thermal design must match the specific footprint.
What thermal metrics apply to the SN74LV125APWR in TSSOP-14 package?
For the SN74LV125APWR in PW (TSSOP-14) package, RθJA is 119.8°C/W, RθJC(top) is 48.6°C/W, and RθJB is 61.5°C/W, per Section 6.4 Thermal Information. These values assume JEDEC-standard PCB mounting and inform heatsinking decisions for continuous operation at 125°C ambient in enclosed industrial enclosures.
SN74LV125APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LV125APWR FAQ
1.How can I place an order for SN74LV125APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125APWR 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 SN74LV125APWR reliable?
The price and inventory of SN74LV125APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125APWR is usually 5 days.
3.What payment methods are accepted for SN74LV125APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125APWR?
SN74LV125APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125APWR 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 SN74LV125APWR?
For technical support, including SN74LV125APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125APWR requirements.
6.How does Aetrix verify that SN74LV125APWR is sourced from the original manufacturer or authorized distributors?
All SN74LV125APWR 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 SN74LV125APWR meets industry standards.
7.What is the process for return or replacement of SN74LV125APWR?
All SN74LV125APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125APWR, 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 SN74LV125APWR part is unused and in its original packaging.
Return procedure for SN74LV125APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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