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Texas Instruments SN74LV125APWRE4
- Part No.:
- SN74LV125APWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV125APWRE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,338
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Product details
Overview
SN74LV125APWRE4 from Texas Instruments is a quadruple 3-state bus buffer gate designed for level-translating, bidirectional bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers 6 ns max propagation delay at 5 V, supports Ioff partial-power-down mode, and features 5.5-V-tolerant inputs - enabling reliable interfacing between 3.3-V logic and 5-V peripherals in industrial SSDs and PoE controllers.
For engineers reviewing the SN74LV125APWRE4 datasheet, SN74LV125APWRE4 pinout, SN74LV125APWRE4 application, or SN74LV125APWRE4 equivalent, this page provides verified functional identity, TSSOP-14 package mapping, confirmed 3-state timing specs (tpd, ten, tdis), real-world noise performance (VOLP < 0.8 V, VOHV > 2.3 V), and two validated alternative parts with documented functional trade-offs.
Technical Context
The SN74LV125APWRE4 implements four independent noninverting buffers, each with active-low 3-state output enable (OE). Its CMOS design enables true mixed-mode voltage operation: inputs accept up to 5.5 V regardless of VCC (2–5.5 V), allowing down-translation from higher-voltage buses without external level shifters.
Each buffer exhibits rail-to-rail output drive capability, low dynamic ground bounce (VOLP < 0.8 V @ 3.3 V), and undershoot control (VOHV > 2.3 V), making it suitable for noise-sensitive routing in motor drives and PLC backplanes where signal integrity must be preserved across varying load capacitances (15–50 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - Enables direct interface between 2.5-V, 3.3-V, and 5-V logic domains without level-shifting circuitry. |
| Max tpd | 6 ns at VCC = 5 V, CL = 15 pF - Ensures sub-10 ns timing margin for high-speed bus buffering in enterprise SSD control paths. |
| Ioff | 5 µA max - Allows safe insertion into live backplanes and prevents current leakage during partial power-down in PoE-powered devices. |
| Input Voltage Tolerance | Up to 5.5 V - Permits 5-V signals to be safely driven into 3.3-V powered SN74LV125APWRE4, eliminating need for external clamping diodes. |
| ESD Rating (HBM) | ±4000 V - Meets industrial-grade robustness requirements for flow meter and motor drive environments with frequent handling. |
| Operating Temperature | –40°C to +125°C - Supports deployment in under-hood automotive-adjacent industrial enclosures and high-ambient PoE switch designs. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, thin profile suitable for space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable controls - Each independently disables its associated buffer output into high-impedance state for bus sharing. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Buffer input terminals - Accept 5.5-V-tolerant logic signals regardless of VCC setting (2–5.5 V). |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Noninverting buffered outputs - Drive loads up to ±35 mA per channel with rail-aligned VOH/VOL. |
| 7 | GND | Ground reference - Must be connected to system ground plane; decoupling capacitor required within 5 mm. |
| 14 | VCC | Power supply - Requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Inputs tolerate 5.5 V while VCC = 2.5 V or 3.3 V - eliminates external level shifters in heterogeneous voltage subsystems. |
| Ioff partial-power-down protection | Leakage < 5 µA when VCC = 0 - prevents back-driving and latch-up during hot-swap or staged power sequencing in PLC modules. |
| Low-noise output drive | VOLP < 0.8 V and VOHV > 2.3 V @ 3.3 V - reduces EMI and signal integrity risk on long traces in motor control feedback loops. |
| Rail-to-rail output swing | VOH ≥ VCC – 0.1 V, VOL ≤ 0.1 V - ensures full logic swing compatibility with downstream 3.3-V or 5-V receivers. |
| High-temperature operation | Rated to +125°C ambient - supports placement near heat-generating components in PoE injectors and solid-state drive controller boards. |
Applications
| Industrial Flow Meters | Enterprise Solid-State Drives |
|---|---|
Use Scenario: Isolating sensor data lines (e.g., pulse output from turbine meter) from microcontroller GPIO while maintaining 5-V legacy interface compatibility. IC Role / Device Role / Timing Role: 3-state bus buffer providing voltage-level translation and bidirectional bus contention prevention during firmware updates. Use Value: Eliminates need for discrete level shifters; Ioff prevents sensor line corruption during MCU reset sequences. |
Use Scenario: Buffering command/address lines between NAND flash controller (3.3 V) and legacy 5-V PCIe bridge ICs in enterprise SSD modules. IC Role / Device Role / Timing Role: Low-skew, low-noise noninverting buffer enabling clean signal propagation across mixed-voltage memory subsystems. Use Value: 6 ns max tpd meets tight timing budgets; 5.5-V-tolerant inputs avoid signal degradation from overshoot on 5-V control lines. |
| Power over Ethernet Controllers | Programmable Logic Controllers |
Use Scenario: Isolating management interface (I²C/SPI) between PoE PD controller (3.3 V) and 5-V auxiliary monitoring circuitry in midspan injectors. IC Role / Device Role / Timing Role: Quad 3-state buffer enabling shared bus access while preventing cross-talk between powered and unpowered subsystems. Use Value: Ioff support allows safe hot-plug operation; ±4000-V HBM rating withstands field ESD events near Ethernet ports. |
Use Scenario: Driving multiple isolated digital I/O expansion modules from a central 3.3-V FPGA while interfacing with legacy 5-V actuator drivers. IC Role / Device Role / Timing Role: Voltage-translating bus driver ensuring logic-level compatibility and noise immunity across distributed I/O backplane. Use Value: VOLP/VOHV specs suppress ringing on long PCB traces; 125°C rating accommodates enclosure temperatures in industrial cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWRE4 | Lower VCC min (1.65 V), faster tpd (5.2 ns @ 3.3 V), but only 3.6-V input tolerance - no 5.5-V tolerance. | Not suitable for 5-V-to-3.3-V translation; requires strict 3.3-V-only system design. | Select when operating exclusively at 3.3 V and speed is prioritized over voltage flexibility. |
| 74LVX125MTCX | Same 2–3.6 V VCC range, 5.5-V input tolerant, but only rated to 85°C ambient and lacks Ioff spec. | Unsuitable for extended-temperature industrial deployments; no partial-power-down guarantee. | Select only for commercial-temperature consumer applications where cost is critical and thermal margin is ample. |
Compared with SN74LVC125APWRE4 and 74LVX125MTCX, the SN74LV125APWRE4 uniquely combines 5.5-V input tolerance, Ioff, and 125°C operation - making it the sole choice for ruggedized, mixed-voltage industrial bus isolation where reliability across voltage and temperature extremes is mandatory.
Availability
SN74LV125APWRE4 is available at Aetrix Electronics and suitable for industrial flow meters, enterprise solid-state drives, and Power over Ethernet controllers requiring stable component supply across extended temperature ranges and mixed-voltage interfaces.
Supply support for SN74LV125APWRE4 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 and embedded processing technologies, with decades of expertise in logic, interface, and power management ICs.
The SN74LV125APWRE4 belongs to TI's LV family of low-voltage, high-noise-immunity logic devices, engineered specifically for robust operation in industrial automation, infrastructure, and enterprise storage systems demanding wide VCC range and 5.5-V input tolerance.
FAQ
What is the maximum operating temperature for SN74LV125APWRE4?
The SN74LV125APWRE4 is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 and supports deployment in high-temperature industrial enclosures such as motor drive cabinets and PoE switch chassis where internal ambient exceeds 85°C.
Does SN74LV125APWRE4 support 5-V-to-3.3-V level translation?
Yes, the SN74LV125APWRE4 supports true 5-V-to-3.3-V level translation: its inputs tolerate up to 5.5 V regardless of VCC (set to 3.3 V), and its outputs swing rail-to-rail (VOH ≥ 3.2 V, VOL ≤ 0.1 V), ensuring full logic compatibility with downstream 3.3-V receivers.
What is the purpose of the Ioff feature in SN74LV125APWRE4?
The Ioff feature limits input/output leakage to ≤5 µA when VCC = 0 V, enabling safe insertion into live backplanes and preventing back-driving or latch-up during partial power-down - a critical requirement in modular PLC I/O systems and hot-swappable SSD carrier boards.
Can SN74LV125APWRE4 drive a 50-pF load with guaranteed timing?
Yes, the SN74LV125APWRE4 guarantees tpd ≤ 9.5 ns (max) at VCC = 3.3 V and CL = 50 pF across –40°C to +85°C, and ≤ 14.5 ns across –40°C to +125°C - meeting timing requirements for high-density industrial backplane routing with typical trace+connector capacitance.
Is SN74LV125APWRE4 RoHS-compliant?
SN74LV125APWRE4 is offered in both RoHS-compliant and non-RoHS versions; the part number suffix "E4" indicates lead-free NiPdAu finish with RoHS exemption for high-temperature soldering (per TI's official packaging addendum), and full compliance is confirmed via TI's material declaration reports.
SN74LV125APWRE4 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:
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LV125APWRE4 FAQ
1.How can I place an order for SN74LV125APWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125APWRE4 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 SN74LV125APWRE4 reliable?
The price and inventory of SN74LV125APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125APWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LV125APWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125APWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125APWRE4?
SN74LV125APWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125APWRE4 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 SN74LV125APWRE4?
For technical support, including SN74LV125APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125APWRE4 requirements.
6.How does Aetrix verify that SN74LV125APWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LV125APWRE4 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 SN74LV125APWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LV125APWRE4?
All SN74LV125APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125APWRE4, 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 SN74LV125APWRE4 part is unused and in its original packaging.
Return procedure for SN74LV125APWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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