My Inquiry
My Account
Texas Instruments SN74LVC125APWG4
- Part No.:
- SN74LVC125APWG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125APWG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,958
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC125APWG4 from Texas Instruments is a quadruple 3-state bus buffer gate designed for level translation and bus isolation in 1.65V–3.6V systems. It features four independent channels, each with dedicated output-enable (OE) control, 4.8ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and operation across –40°C to 125°C. It is used in telecom baseband units and optical networking interfaces where voltage-level bridging and low-power bus driving are required.
For engineers reviewing the SN74LVC125APWG4 datasheet, SN74LVC125APWG4 pinout, SN74LVC125APWG4 application, or SN74LVC125APWG4 equivalent, key selection criteria include 3-state output timing, VCC-dependent drive strength, input overvoltage tolerance, thermal derating in TSSOP-14, and compatibility with mixed 3.3V/5V signal domains.
Technical Context
The SN74LVC125APWG4 implements four identical noninverting buffer stages, each with active-low OE control enabling independent channel gating. Its CMOS design supports rail-to-rail input logic thresholds and delivers ±24mA output drive at 3.0V VCC while maintaining sub-5ns propagation delay under 30pF load.
Each channel operates as a transparent path when OE is low (logic 0), and enters high-impedance state when OE is high (logic 1). Input overvoltage tolerance up to 5.5V allows safe interfacing with legacy 5V logic without external level shifters, making it suitable for migration paths in telecom infrastructure upgrades.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables direct integration into modern low-voltage digital subsystems without level-shifting circuitry. |
| Max Propagation Delay | 4.8ns at 3.3V - Supports data rates up to ~200MHz in point-to-point bus applications with tight timing budgets. |
| Input Voltage Tolerance | Up to 5.5V - Allows connection to 5V sources (e.g., legacy controllers) without damage or external clamping. |
| Output Drive Strength | ±24mA at 3.0V - Sufficient to drive 50Ω transmission lines or multiple LVC loads with controlled edge rates. |
| Operating Temperature | –40°C to 125°C - Qualified for use in outdoor telecom shelters, remote radio units, and industrial baseband processing. |
| ESD Rating | ±2000V HBM - Meets standard handling requirements for automated assembly and field-replaceable modules. |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body, 0.65mm pitch, exposed pad optional, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low enable input per channel | Independent gating control; tie high via pullup to ensure Hi-Z during power-up/down sequences. |
| 1A–4A | Buffer input per channel | Noninverting data input; accepts 0–5.5V signals regardless of VCC setting. |
| 1Y–4Y | Buffer output per channel | 3-state output; drives bus only when corresponding OE is low; high-impedance otherwise. |
| VCC | Positive supply | Single 1.65–3.6V rail powers all logic and I/O; requires local 0.1μF bypass capacitor. |
| GND | Ground reference | Common return for all internal logic and I/O; must be low-inductance connection for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel 3-state control | Enables selective bus segment isolation without affecting other channels-critical for multi-drop backplane arbitration. |
| 5.5V-tolerant inputs | Eliminates need for external level translators when interfacing with 5V microcontrollers or FPGAs in hybrid voltage systems. |
| Low dynamic power consumption | Typical Cpd = 15pF at 3.3V enables <1mW per channel at 10MHz, reducing thermal load in dense telecom modules. |
| Robust latch-up immunity | Exceeds 250mA per JESD17 - ensures reliability in noisy power distribution environments like telecom PDUs and PMUs. |
Applications
| Telecom Baseband Units | Optical Networking Interfaces |
|---|---|
Use Scenario: Signal routing between FPGA-based modems and analog front-end ICs in LTE/5G baseband processing cards. IC Role / Device Role / Timing Role: Bus buffer isolating 3.3V FPGA I/O from 5V DAC/ADC control lines while preserving signal integrity. Use Value: Eliminates external level shifters and reduces BOM count by leveraging 5.5V-tolerant inputs and 3.3V-compatible outputs. | Use Scenario: Interfacing EPON line cards with management microcontrollers operating at different supply voltages. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling 3.3V MCU GPIOs to configure 5V optical transceivers. Use Value: Maintains <4.8ns propagation delay across voltage domains, ensuring deterministic register access timing in real-time control loops. |
| Remote Radio Units (RRU) | Power Monitoring Units (PMU) |
Use Scenario: Isolating FPGA configuration buses from RF section power domains in tower-mounted amplifiers. IC Role / Device Role / Timing Role: 3-state buffer preventing backdrive during RRU power sequencing and hot-swap events. Use Value: Independent OE pins allow staggered enable/disable per channel, supporting phased power-up of RF chains without bus contention. | Use Scenario: Buffering sensor data and control signals between isolated 3.3V monitoring MCU and 5V analog power telemetry circuits. IC Role / Device Role / Timing Role: Level-translating bus driver enabling accurate voltage/current sampling in telecom shelter power distribution units. Use Value: ±24mA drive capability supports long trace runs to distributed sensors while maintaining logic threshold margins over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125ADG4 | SOIC-14 package; larger footprint (8.6mm × 6mm); higher RθJA (127.8°C/W); same electrical specs. | Better suited for prototyping or low-density PCBs where thermal margin is less constrained and hand-soldering is preferred. | Select when board space permits larger package and thermal performance requirements are relaxed. |
| SN74LVC125APWR | TSSOP-14 in tape-and-reel (2000 pcs); identical pinout and specs; same PW package but different packaging format. | Optimized for high-volume automated assembly; no functional difference-only logistics and reel configuration vary. | Select for production runs requiring standard large-reel feeding; electrically interchangeable with SN74LVC125APWG4. |
Compared with SN74LVC125ADG4, the SN74LVC125APWG4 offers superior thermal performance (RθJA = 150.8°C/W vs. 127.8°C/W) and smaller footprint, while SN74LVC125APWR differs only in packaging format-not functionality-making it a drop-in manufacturing alternative rather than a design alternative.
Availability
SN74LVC125APWG4 is available at Aetrix Electronics and suitable for telecom baseband units, optical networking interfaces, remote radio units, and power monitoring units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74LVC125APWG4 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 solutions with decades of experience in high-reliability industrial and communications ICs.
The SN74LVC125A family was designed specifically for voltage-level translation and bus isolation in next-generation telecom infrastructure, emphasizing robustness, low power, and interoperability across mixed-voltage digital systems.
FAQ
What is the maximum operating temperature range for SN74LVC125APWG4?
The SN74LVC125APWG4 is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's characterization and supports deployment in harsh environments such as outdoor telecom shelters and remote radio units where passive cooling dominates thermal management. The device maintains full electrical specifications across this range when operated within its recommended VCC limits.
Does SN74LVC125APWG4 require external pull-up resistors on OE pins?
Yes - to ensure reliable high-impedance state during power-up or power-down transitions, each OE pin should be tied to VCC through an external pull-up resistor. The minimum resistance value depends on the current-sourcing capability of the driving source; TI recommends values ≥10kΩ for typical microcontroller GPIOs. Leaving OE floating risks undefined output states and potential bus contention.
Can SN74LVC125APWG4 interface directly with 5V logic outputs?
Yes - the SN74LVC125APWG4 inputs are specified to tolerate up to 5.5V regardless of VCC level, allowing direct connection to 5V TTL or CMOS outputs without clamping diodes or level-shifting circuitry. This feature is explicitly verified in TI's datasheet Section 5.3 and enables seamless integration into mixed-voltage systems like legacy controller-to-modern-FPGA interfaces.
What is the typical power dissipation per channel at 3.3V and 10MHz?
At 3.3V VCC and 10MHz toggle rate, the SN74LVC125APWG4 exhibits a typical power dissipation capacitance (Cpd) of 15pF per gate. Using the formula P = Cpd × V² × f, this yields ~1.65mW per active channel - well within the 500mW total package limit. Actual system-level dissipation depends on switching activity and load capacitance, but the low Cpd supports energy-efficient designs in thermally constrained modules.
Is SN74LVC125APWG4 pin-compatible with other members of the SN74LVC125A family?
Yes - all SN74LVC125A variants, including SN74LVC125APWG4, SN74LVC125ADG4, and SN74LVC125APWR, share identical pinouts and electrical behavior across packages. The TSSOP-14 (PW), SOIC-14 (D), SSOP-14 (DB), and VQFN-14 (RGY) versions are functionally interchangeable at the schematic level; only mechanical fit, thermal resistance, and assembly process differ.
SN74LVC125APWG4 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
SN74LVC125APWG4 FAQ
1.How can I place an order for SN74LVC125APWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125APWG4 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 SN74LVC125APWG4 reliable?
The price and inventory of SN74LVC125APWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125APWG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC125APWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125APWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125APWG4?
SN74LVC125APWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125APWG4 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 SN74LVC125APWG4?
For technical support, including SN74LVC125APWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125APWG4 requirements.
6.How does Aetrix verify that SN74LVC125APWG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125APWG4 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 SN74LVC125APWG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC125APWG4?
All SN74LVC125APWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125APWG4, 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 SN74LVC125APWG4 part is unused and in its original packaging.
Return procedure for SN74LVC125APWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC125APWG4 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…
