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Texas Instruments SN74LVC125APWRG4
- Part No.:
- SN74LVC125APWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125APWRG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,446
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Product details
Overview
SN74LVC125APWRG4 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, accepts 5.5V-tolerant inputs, delivers ≤4.8ns propagation delay at 3.3V, and supports industrial temperature range (–40°C to 125°C). It is used in telecom baseband units and optical networking interfaces where voltage-level bridging and low-power tri-state control are required.
For engineers reviewing the SN74LVC125APWRG4 datasheet, SN74LVC125APWRG4 pinout, SN74LVC125APWRG4 application, or SN74LVC125APWRG4 equivalent, key selection criteria include 5.5V input tolerance, guaranteed 3-state behavior during power sequencing, tpd ≤4.8ns at 3.3V, VCC operating range (1.65–3.6V), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVC125APWRG4 implements four independent noninverting buffers, each with dedicated output-enable (OE) control. Each channel passes A→Y when OE is low and enters high-impedance state when OE is high - enabling dynamic bus sharing without contention. Its CMOS design ensures balanced drive strength (±24mA at 3V) and rail-to-rail output swing (VOH ≥ VCC–0.2V, VOL ≤ 0.3V).
Input overvoltage tolerance (up to 5.5V regardless of VCC) allows safe interfacing with legacy 5V logic while powered from 3.3V or lower supplies. The device's latch-up immunity (>250mA per JESD17) and ESD robustness (±2000V HBM) support reliable operation in telecom infrastructure environments subject to electrical transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct use in 1.8V, 2.5V, and 3.3V systems without level shifters. |
| Input Voltage Max | 5.5V - permits connection to 5V logic outputs while VCC = 3.3V, supporting mixed-supply translation. |
| tpd (3.3V) | ≤4.8ns - ensures sub-5ns signal path delay for high-speed data routing in backhaul and baseband timing paths. |
| IOL / IOH (3V) | ±24mA - provides sufficient drive for stub-loaded buses and moderate capacitive loads (e.g., ≤30pF). |
| Operating Temp | –40°C to 125°C - qualified for deployment in outdoor telecom shelters, RRUs, and power distribution units. |
| ESD (HBM) | ±2000V - meets industrial-grade ESD immunity requirements for board-level handling and field operation. |
| Power Dissipation | 500mW max - supports continuous operation in compact TSSOP-14 packages with adequate PCB copper area. |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body, 0.65mm pitch, exposed thermal pad optional, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low enable input | Individually controls high-impedance state on corresponding Y output; tie to VCC via pullup for power-up safety. |
| 1A–4A | Buffer input | Noninverting data input per channel; tolerant to 5.5V regardless of VCC value. |
| 1Y–4Y | Buffer output | Tri-state output with rail-to-rail swing; drives bidirectional buses or downstream logic loads. |
| VCC | Positive supply | Single supply pin for all four channels; requires local 0.1µF bypass capacitor. |
| GND | Ground reference | Common return for all I/O and supply currents; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5V-tolerant inputs | Enables seamless interface between 3.3V logic domains and legacy 5V peripherals without external translators. |
| Independent 3-state control | Four separate OE pins allow selective bus segment isolation - critical for multi-drop memory or data bus architectures. |
| Low propagation delay | 4.8ns max at 3.3V supports >100MHz data rates in point-to-point links and synchronous bus applications. |
| Wide temperature qualification | –40°C to 125°C operation ensures reliability in uncontrolled telecom enclosures and outdoor radio units. |
| Latch-up immunity | Exceeds 250mA per JESD17 - prevents destructive failure during transient overvoltage events in power-distribution subsystems. |
Applications
| Telecom Baseband Unit | Optical Networking Interface |
|---|---|
|
Use Scenario: Signal conditioning between FPGA I/O banks (3.3V) and legacy 5V analog front-end components in wireless baseband processing. IC Role / Device Role / Timing Role: Voltage-level translator and bus isolator, enabling clean signal handoff without level-shifter ICs. Use Value: Eliminates need for discrete level-shifters, reduces BOM count, and maintains <5ns timing margin across clock/data paths. |
Use Scenario: Driving parallel control lines (e.g., laser bias, monitor photodiode, TEC control) in EPON optical line terminals. IC Role / Device Role / Timing Role: Tri-state buffer for shared configuration bus among multiple optical modules on a single backplane. Use Value: Prevents bus contention during hot-swap insertion/removal of pluggable optics while maintaining deterministic timing. |
| Remote Radio Unit (RRU) | Power Distribution Unit (PDU) |
|
Use Scenario: Isolating digital control signals (e.g., gain setting, filter selection) between BBIC and RF transceiver ASIC in tower-mounted radios. IC Role / Device Role / Timing Role: Low-latency, high-reliability bus buffer with fail-safe 3-state behavior during power ramp-up/down sequences. Use Value: Guarantees high-Z state at power-on, avoiding undefined logic states that could trigger spurious RF transmission. |
Use Scenario: Managing status and control lines (e.g., fault reporting, enable/disable, current sensing) across multiple DC/DC converter modules in telecom shelter PDUs. IC Role / Device Role / Timing Role: Robust digital interface buffer rated for extended temperature and high ESD stress in industrial power environments. Use Value: Withstands repeated hot-plug cycles and ambient transients without latch-up or parametric drift over 10+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Same silicon, identical specs, NIPDAU vs SN lead finish; MSL Level-1 same, RoHS compliant. | No functional difference; suitable for same designs; G4 suffix indicates green (halogen-free) packaging. | Select SN74LVC125APWRG4 when halogen-free compliance is required per IPC-1752 or customer environmental policy. |
| 74LVC125ADBRG4 | SSOP-14 package (6.20mm × 7.8mm), higher RθJA (140.4°C/W), same electrical specs and temp range. | Less suitable for space-constrained RRU or PDU PCBs; better for through-hole prototyping or legacy SSOP footprints. | Choose 74LVC125ADBRG4 only if existing layout uses SSOP-14; avoid for new high-density designs due to larger footprint and thermal resistance. |
Compared with SN74LVC125APWR and 74LVC125ADBRG4, the SN74LVC125APWRG4 offers identical logic functionality and performance in a smaller, thermally superior TSSOP-14 package with halogen-free construction - making it optimal for next-generation telecom hardware where size, thermal headroom, and environmental compliance are jointly constrained.
Availability
SN74LVC125APWRG4 is available at Aetrix Electronics and suitable for telecom baseband units, optical networking interfaces, remote radio units, and power distribution units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for SN74LVC125APWRG4 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 company specializing in analog and embedded processing technologies, with leadership in industrial, automotive, and communications markets.
The SN74LVC125A belongs to TI's LVC logic family, engineered for low-voltage operation, high noise immunity, and interoperability across mixed-supply systems - specifically targeting infrastructure equipment where reliability, density, and voltage translation are critical.
FAQ
What is the maximum input voltage rating for SN74LVC125APWRG4?
The SN74LVC125APWRG4 supports input voltages up to 5.5V regardless of VCC level - a key feature enabling direct interfacing with 5V logic while operating from 1.65V–3.6V supplies. This overvoltage tolerance is specified across the full temperature range (–40°C to 125°C) and does not require external clamping circuitry. The SN74LVC125APWRG4 maintains this rating even during power-up or brownout conditions, provided absolute maximum ratings are not exceeded.
Does SN74LVC125APWRG4 support true 3-state behavior during power-up?
Yes - the SN74LVC125APWRG4 achieves predictable high-impedance outputs at power-up when OE pins are tied to VCC via an appropriate pullup resistor. TI recommends sizing the resistor based on the driver's current-sourcing capability to ensure OE remains high until VCC stabilizes. This behavior is verified across –40°C to 125°C and is critical for preventing bus contention in telecom baseband and RRU applications where power sequencing is asynchronous.
What is the typical propagation delay of SN74LVC125APWRG4 at 3.3V?
The SN74LVC125APWRG4 exhibits a maximum propagation delay (tpd) of 4.8ns at VCC = 3.3V ± 0.3V and TA = 25°C, with typical values around 2.5ns. This specification is measured under standard load conditions (CL = 30pF, Δt/Δv = 8ns/V) and applies to both A→Y and OE→Y transitions. The low delay enables use in high-speed data paths such as FPGA-to-ADC control lines or parallel bus segments in optical networking gear.
Can SN74LVC125APWRG4 be used in a 1.8V system?
Yes - the SN74LVC125APWRG4 is fully specified for operation down to 1.65V, making it compatible with 1.8V systems. At VCC = 1.8V, it delivers tpd ≤11.8ns, VOH ≥ 1.6V, and VOL ≤ 0.45V while driving 4mA loads. Its 5.5V-tolerant inputs remain valid, allowing connection to higher-voltage peripherals without risk of damage or logic misinterpretation in mixed-voltage FPGA or SoC interfaces.
What package type is used for SN74LVC125APWRG4?
The SN74LVC125APWRG4 uses a 14-pin TSSOP (Thin Shrink Small Outline Package), designated PW by Texas Instruments. Its dimensions are 5.00mm × 6.4mm with 0.65mm lead pitch, RoHS-compliant NIPDAU surface finish, and Moisture Sensitivity Level 1 (unlimited floor life at ≤30°C/60% RH). This package supports automated assembly and provides better thermal performance than SSOP alternatives, with RθJA = 150.8°C/W.
SN74LVC125APWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SN74LVC125APWRG4 FAQ
1.How can I place an order for SN74LVC125APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125APWRG4 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 SN74LVC125APWRG4 reliable?
The price and inventory of SN74LVC125APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125APWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC125APWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125APWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125APWRG4?
SN74LVC125APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125APWRG4 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 SN74LVC125APWRG4?
For technical support, including SN74LVC125APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125APWRG4 requirements.
6.How does Aetrix verify that SN74LVC125APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125APWRG4 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 SN74LVC125APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC125APWRG4?
All SN74LVC125APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125APWRG4, 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 SN74LVC125APWRG4 part is unused and in its original packaging.
Return procedure for SN74LVC125APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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