My Inquiry
My Account
Texas Instruments SN74LVC125APW
- Part No.:
- SN74LVC125APW
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125APW.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:524
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC125APW 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 operation - enabling use in telecom baseband units and optical networking line cards.
For engineers reviewing the SN74LVC125APW datasheet, SN74LVC125APW pinout, SN74LVC125APW application, or SN74LVC125APW equivalent, key selection criteria include its independent OE control per channel, 3.6V max VCC, 5.5V input tolerance, thermal performance in TSSOP-14 (RθJA = 150.8°C/W), and compatibility with 3.3V/5V interface bridging in high-reliability infrastructure designs.
Technical Context
The SN74LVC125APW implements four independent noninverting buffers, each with dedicated output-enable (OE) logic that places the Y output in high-impedance when OE = HIGH. Its CMOS design ensures rail-to-rail output swing and balanced drive strength (±24mA at 3V), while input overvoltage tolerance enables safe interfacing with legacy 5V logic without external level shifters.
Power sequencing is supported via OE pull-up resistor guidance (to VCC), ensuring defined high-Z state during power-up/down. The device exhibits low dynamic power consumption (Cpd = 15pF at 3.3V) and robust ESD protection (±2000V HBM), making it suitable for densely populated telecom PCBs where signal integrity and latch-up immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V–3.6V - Enables direct integration into 3.3V systems and compatibility with 2.5V/1.8V domains via voltage scaling. |
| Input Voltage Max | 5.5V - Allows connection to 5V logic without clamping diodes or external translators, simplifying mixed-voltage board design. |
| tpd (3.3V) | ≤4.8ns - Supports >100MHz data rates in bus buffering applications such as backplane interfaces and FPGA I/O expansion. |
| IOL/IOH (3V) | ±24mA - Drives standard 50Ω transmission lines or multiple LVC loads without external buffers, reducing component count. |
| Operating Temp | –40°C to 125°C - Qualified for industrial and telecom outdoor equipment including RRUs, PDUs, and remote radio units. |
| RθJA (PW) | 150.8°C/W - Requires minimal heatsinking in TSSOP-14 package; derates linearly above 60°C (5.5mW/K). |
| ESD HBM | ±2000V - Meets JEDEC JS-001 requirements for handling in automated assembly and field-deployable modules. |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body size, 14-pin surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Input | Independent 3-state enable controls - each disables only its associated buffer, enabling selective bus segmentation. |
| 1A–4A | Input | Data inputs - accept 0–5.5V signals regardless of VCC, supporting bidirectional voltage translation. |
| 1Y–4Y | Output | Noninverting buffered outputs - actively driven LOW/HIGH or high-impedance; no internal pull-ups/downs. |
| VCC (Pin 14) | Power | Single supply rail - powers all four buffers; requires local 0.1μF bypass capacitor per TI layout guidelines. |
| GND (Pin 7) | Ground | Common reference - must be low-inductance connection; recommended GND flood fill improves noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Independent OE per channel | Enables granular bus control - e.g., isolate one memory channel while keeping others active in multi-bank systems. |
| 5.5V-tolerant inputs | Eliminates need for discrete level-shifting components when interfacing with 5V microcontrollers or legacy peripherals. |
| Low propagation delay | 4.8ns max at 3.3V allows timing-critical applications like JTAG boundary scan chains or high-speed GPIO expansion. |
| High drive strength | ±24mA output current supports driving unterminated stubs or fan-out to ≥10 LVC loads without signal degradation. |
| Latch-up immunity | >250mA per JESD17 - ensures robustness in noisy telecom environments with transient coupling or hot-swap events. |
Applications
| Telecom Baseband Units | Optical Networking Line Cards |
|---|---|
|
Use Scenario: Signal routing between FPGA fabric and multiple analog front-end ICs in 5G baseband processing boards. IC Role / Device Role / Timing Role: Bus buffer isolating differential ADC/DAC control lines and status signals while translating between 3.3V FPGA I/O and 5V monitoring circuitry. Use Value: Prevents contention on shared control buses and maintains signal integrity across mixed-supply domains without added logic complexity. |
Use Scenario: Interfacing EPON OLT MAC controller (3.3V) with 5V SFP+ module management interfaces in fiber access systems. IC Role / Device Role / Timing Role: Level-translating buffer for I²C, MDIO, and reset signaling between host processor and pluggable optics modules. Use Value: Enables direct 5V-tolerant communication without external translators, reducing BOM cost and PCB area in space-constrained line cards. |
| Remote Radio Units (RRU) | Power Distribution Units (PDU) |
|
Use Scenario: Isolating FPGA-configured RF calibration data paths from high-noise PA bias control circuits in outdoor RRUs. IC Role / Device Role / Timing Role: 3-state bus gate managing serial configuration streams to GaN amplifier drivers under thermal/voltage stress conditions. Use Value: Guarantees high-impedance isolation during power cycling, preventing back-driving and latch-up in harsh RF environments. |
Use Scenario: Buffering microcontroller GPIOs driving LED status indicators, relay drivers, and sensor readouts in telecom shelter PDUs. IC Role / Device Role / Timing Role: Robust digital interface conditioner providing noise-immune signal conditioning for supervisory functions across wide temperature range. Use Value: Delivers reliable on/off control and status feedback despite voltage transients and EMI common in DC/DC module enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AD | SOIC-14 package (8.6mm × 6mm); higher RθJA (127.8°C/W); same electrical specs and pinout. | Better suited for through-hole prototyping or legacy wave-soldered assemblies; less dense than TSSOP. | Select when board-level reworkability or manual soldering is prioritized over footprint size and thermal efficiency. |
| 74LVC125ABQAR | WQFN-14 (3mm × 2.5mm); lower RθJA (102.3°C/W); identical logic function and voltage ratings. | Preferred for space-constrained, thermally demanding applications like small-cell radios or compact optical modules. | Choose when PCB area reduction and improved thermal performance outweigh TSSOP's assembly familiarity. |
Compared with SN74LVC125AD and SN74LVC125ABQAR, the SN74LVC125APW offers optimal balance of manufacturability (TSSOP-14), thermal margin for mid-power telecom modules, and industry-standard footprint - making it ideal for volume production of carrier-grade infrastructure hardware.
Availability
SN74LVC125APW is available at Aetrix Electronics and suitable for telecom baseband units, optical networking line cards, and remote radio units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74LVC125APW 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 delivering analog and embedded processing solutions, with core expertise in high-reliability interface, power, and signal-chain ICs for industrial and communications markets.
The SN74LVC125A product line targets voltage-translation and bus-isolation needs in infrastructure equipment - specifically engineered for interoperability across 1.65V–3.6V logic families while maintaining 5V input tolerance and robust ESD performance.
FAQ
What is the maximum input voltage rating for SN74LVC125APW?
The SN74LVC125APW supports input voltages up to 5.5V regardless of VCC level - a key feature enabling direct interfacing with 5V logic in mixed-supply systems. This overvoltage tolerance is specified across the full operating temperature range (–40°C to 125°C) and does not require external clamping circuitry. The SN74LVC125APW maintains this rating while operating from 1.65V to 3.6V, making it suitable for bridging legacy and modern logic families without additional components.
Does SN74LVC125APW support independent 3-state control per channel?
Yes, the SN74LVC125APW provides four separate output-enable (OE) inputs - 1OE, 2OE, 3OE, and 4OE - each controlling only its corresponding buffer (1A→1Y, etc.). This architecture allows selective bus isolation, such as disabling one memory channel while keeping others active. The SN74LVC125APW datasheet confirms that pulling any OE HIGH forces only its associated Y output into high-impedance, with no effect on other channels' output states.
What is the typical propagation delay of SN74LVC125APW at 3.3V?
The SN74LVC125APW has a maximum propagation delay (tpd) of 4.8ns at VCC = 3.3V ± 0.3V and TA = 25°C, with typical values as low as 2.5ns. This specification applies to both A→Y and OE→Y transitions and is measured under standard load conditions (CL = 30pF). The SN74LVC125APW maintains sub-6ns performance across its full industrial temperature range, supporting high-speed data routing in telecom and test equipment applications.
Can SN74LVC125APW be used in –40°C to 125°C applications?
Yes, the SN74LVC125APW is fully specified and qualified for operation from –40°C to 125°C. This extended temperature grade is explicitly listed in the Recommended Operating Conditions table and validated across all key parameters including propagation delay, drive strength, and input thresholds. The SN74LVC125APW's qualification makes it suitable for deployment in outdoor telecom equipment such as remote radio units, tower-mounted amplifiers, and power distribution units exposed to ambient extremes.
What package type is used for SN74LVC125APW?
The SN74LVC125APW uses the TSSOP-14 (PW) package: a 14-pin thin shrink small-outline package with 5.00mm × 6.4mm body dimensions and 0.65mm lead pitch. It is RoHS-compliant, moisture sensitivity level 1 (MSL-1), and rated for peak reflow at 260°C. The SN74LVC125APW's PW package offers a proven balance of thermal performance (RθJA = 150.8°C/W), manufacturability, and board-level reliability for high-volume telecom production.
SN74LVC125APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 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
SN74LVC125APW FAQ
1.How can I place an order for SN74LVC125APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125APW 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 SN74LVC125APW reliable?
The price and inventory of SN74LVC125APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125APW is usually 5 days.
3.What payment methods are accepted for SN74LVC125APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125APW?
SN74LVC125APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125APW 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 SN74LVC125APW?
For technical support, including SN74LVC125APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125APW requirements.
6.How does Aetrix verify that SN74LVC125APW is sourced from the original manufacturer or authorized distributors?
All SN74LVC125APW 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 SN74LVC125APW meets industry standards.
7.What is the process for return or replacement of SN74LVC125APW?
All SN74LVC125APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125APW, 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 SN74LVC125APW part is unused and in its original packaging.
Return procedure for SN74LVC125APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC125APW Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
