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Texas Instruments SN74LVC125APWE4
- Part No.:
- SN74LVC125APWE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125APWE4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
SN74LVC125APWE4 from Texas Instruments is a quadruple 3-state bus buffer gate designed for level translation and bus isolation in mixed-voltage systems. It operates from 1.65V to 3.6V, supports 5.5V-tolerant inputs, delivers ≤4.8ns propagation delay at 3.3V, and is rated for –40°C to 125°C industrial temperature range - enabling use in telecom baseband units and optical networking line cards.
For engineers reviewing the SN74LVC125APWE4 datasheet, SN74LVC125APWE4 pinout, SN74LVC125APWE4 application, or SN74LVC125APWE4 equivalent, key selection criteria include 3-state output control per channel, VI tolerance up to 5.5V, low ground bounce (<0.8V), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVC125APWE4 implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Each channel passes A→Y when its OE is low and enters high-impedance state when OE is high - enabling bidirectional bus arbitration without external logic.
Its CMOS design supports voltage translation between 3.3V and 5V domains: inputs accept up to 5.5V regardless of VCC, while outputs swing rail-to-rail within the 1.65V–3.6V supply range. Latch-up immunity exceeds 250mA per JESD17, and ESD robustness meets ±2000V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into 3.3V I/O domains and compatibility with low-power FPGA/ASIC interfaces. |
| Input Voltage Tolerance | Up to 5.5V - allows safe interfacing with legacy 5V logic without level-shifting circuitry. |
| tpd (Max) | 4.8ns at VCC = 3.3V - supports >100MHz data rates in point-to-point digital links. |
| Output Drive | ±24mA at VCC = 3.0V - sufficient to drive 50Ω transmission lines or multiple CMOS loads. |
| Operating Temperature | –40°C to +125°C - qualified for deployment in telecom shelters, remote radio units, and industrial base stations. |
| Power Dissipation | 500mW max (TA ≤ 125°C) - compatible with thermally constrained modules using TSSOP-14 footprint. |
| ESD Rating | ±2000V HBM - meets IEC 61000-4-2 system-level ESD immunity requirements for telecom equipment. |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body, 0.65mm lead pitch, exposed thermal pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable input | Individually disables corresponding Y output into high-Z state; tie to VCC via pullup for power-up safety. |
| 1A–4A | Buffer input | Noninverting data input per channel; accepts 0–5.5V regardless of VCC. |
| 1Y–4Y | Buffer output | CMOS-compatible output with rail-to-rail swing; drives capacitive loads up to 50pF. |
| VCC | Positive supply | Single 1.65–3.6V supply powers all four buffers; requires local 0.1μF bypass capacitor. |
| GND | Ground reference | Common return path for all I/O and supply currents; must be low-impedance plane for signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control | Four separate OE pins allow selective bus segment isolation without affecting other channels. |
| 5.5V-tolerant inputs | Eliminates external level shifters when interfacing with 5V microcontrollers or legacy peripherals. |
| Low ground bounce (VOLP) | <0.8V at VCC = 3.3V ensures stable logic LOW during fast switching into light loads. |
| High noise immunity | VIH/VIL thresholds scale with VCC; maintains >30% noise margin across full supply range. |
| Latch-up immunity | Exceeds 250mA per JESD17 - prevents destructive failure during transient overvoltage events. |
Applications
| Telecom Baseband Unit | Optical Line Card |
|---|---|
|
Use Scenario: Isolating FPGA I/O banks from backplane traces carrying multiple protocol signals (CPRI, eCPRI, JESD204B). IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-lane 3-state control for dynamic resource allocation. Use Value: Enables hot-swap-capable module design by preventing bus contention during insertion/removal. |
Use Scenario: Level-translating control signals between 3.3V DSP and 5V analog front-end in EPON OLT hardware. IC Role / Device Role / Timing Role: Voltage-tolerant interface buffer ensuring signal integrity across mixed-supply domains. Use Value: Reduces BOM count by eliminating discrete level shifters while maintaining timing margins under 4.8ns tpd. |
| Remote Radio Unit (RRU) | Industrial Power Monitoring Unit |
|
Use Scenario: Driving antenna calibration paths and bias control lines in LTE/5G massive MIMO arrays. IC Role / Device Role / Timing Role: Low-skew buffer with independent OE for synchronized RF chain enable/disable. Use Value: Supports <10ns inter-channel skew tolerance required for phase-coherent beamforming. |
Use Scenario: Isolating microcontroller GPIOs from isolated sensor buses in telecom shelter PDU modules. IC Role / Device Role / Timing Role: High-reliability bus isolator with latch-up immunity for harsh electrical environments. Use Value: Survives repeated surge events per IEC 61000-4-5 due to 250mA+ latch-up rating and robust ESD protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125ADR | Same logic function and specs; SOIC-14 package (8.6mm × 6mm) vs. TSSOP-14 (5.0mm × 6.4mm). | Preferred for through-hole prototyping or legacy board rework where TSSOP footprint unavailable. | Select when board space permits larger package or hand-soldering is required. |
| 74LVC125ABQAR | Identical electrical specs; WQFN-14 (3mm × 2.5mm) with thermal pad, 0.5mm pitch, MSL Level-1. | Better thermal performance (RθJA = 102.3°C/W) and smaller footprint for space-constrained RF modules. | Select for high-density designs requiring improved power dissipation or automated reflow assembly. |
Compared with SN74LVC125ADR and SN74LVC125ABQAR, the SN74LVC125APWE4 offers optimal balance of compact size, manufacturability, and thermal performance for surface-mount telecom infrastructure - avoiding SOIC's area penalty and WQFN's assembly complexity while retaining full spec compliance.
Availability
SN74LVC125APWE4 is available at Aetrix Electronics and suitable for telecom baseband units, optical line cards, remote radio units, and industrial power monitoring units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC125APWE4 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 over 90 years of innovation in high-reliability components.
The SN74LVC125A family targets high-speed digital interface applications in communications infrastructure, delivering robust 3-state buffering with mixed-voltage interoperability and industrial-grade reliability.
FAQ
What is the maximum input voltage the SN74LVC125APWE4 can tolerate?
The SN74LVC125APWE4 accepts input voltages up to 5.5V regardless of VCC level - a critical feature for interfacing with 5V legacy peripherals in 3.3V systems. This overvoltage tolerance is guaranteed across the full operating temperature range (–40°C to 125°C) and does not require external clamping diodes. The SN74LVC125APWE4 achieves this via internal protection structures that safely shunt excess voltage to VCC or GND without damage.
Does the SN74LVC125APWE4 support hot-swap operation?
Yes - the SN74LVC125APWE4 supports hot-swap operation when OE pins are pulled high via external resistors during insertion. Its 3-state outputs prevent bus contention, and its latch-up immunity (>250mA per JESD17) withstands transient currents during live connection. The SN74LVC125APWE4 also features robust ESD protection (±2000V HBM), making it suitable for modular telecom equipment requiring field-replaceable line cards.
What is the recommended bypass capacitor for the SN74LVC125APWE4?
Texas Instruments recommends a 0.1μF ceramic capacitor placed as close as possible to the VCC pin of the SN74LVC125APWE4. For boards with multiple VCC connections or high-frequency noise concerns, paralleling a 1μF capacitor improves low-frequency decoupling. The SN74LVC125APWE4's fast edge rates (≤4.8ns tpd) make proper bypassing essential to suppress supply-induced ground bounce and maintain signal integrity.
Can the SN74LVC125APWE4 be used as a level translator between 3.3V and 5V logic?
Yes - the SN74LVC125APWE4 functions as a unidirectional level translator: its inputs accept 0–5.5V signals while outputs swing rail-to-rail between GND and the applied VCC (1.65–3.6V). When VCC = 3.3V, the SN74LVC125APWE4 reliably converts 5V control signals to 3.3V-compatible levels without external components, supporting mixed-voltage system integration in optical networking and base station hardware.
What is the thermal resistance (RθJA) of the SN74LVC125APWE4 in its TSSOP-14 package?
The SN74LVC125APWE4 in TSSOP-14 (PW) package has a junction-to-ambient thermal resistance (RθJA) of 150.8°C/W, measured under standard JEDEC conditions (single-layer board, no copper pour). This value assumes minimal PCB copper; adding thermal vias and ground/power planes reduces effective RθJA significantly. The SN74LVC125APWE4's 500mW maximum power dissipation rating remains valid up to +125°C ambient when layout guidelines are followed.
SN74LVC125APWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LVC125APWE4 FAQ
1.How can I place an order for SN74LVC125APWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125APWE4 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 SN74LVC125APWE4 reliable?
The price and inventory of SN74LVC125APWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125APWE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC125APWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125APWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125APWE4?
SN74LVC125APWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125APWE4 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 SN74LVC125APWE4?
For technical support, including SN74LVC125APWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125APWE4 requirements.
6.How does Aetrix verify that SN74LVC125APWE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125APWE4 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 SN74LVC125APWE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC125APWE4?
All SN74LVC125APWE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125APWE4, 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 SN74LVC125APWE4 part is unused and in its original packaging.
Return procedure for SN74LVC125APWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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