My Inquiry
My Account
Texas Instruments SN74LVC125APWTE4
- Part No.:
- SN74LVC125APWTE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125APWTE4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC125APWTE4 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 SN74LVC125APWTE4 datasheet, SN74LVC125APWTE4 pinout, SN74LVC125APWTE4 application, or SN74LVC125APWTE4 equivalent, this page provides verified functional context, validated TSSOP-14 pin mapping, confirmed 3.3V/5V interface capability, and real-world telecom infrastructure use cases - all derived from TI's official SCAS290T datasheet (Rev. T, Sep 2024).
Technical Context
The SN74LVC125APWTE4 implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Its CMOS design enables bidirectional voltage translation: 5V inputs safely drive 3.3V outputs without external level shifters, while maintaining rail-to-rail logic thresholds across the full 1.65V–3.6V VCC range.
Each buffer features high-impedance (Z) state control via OE, with guaranteed power-up/power-down high-Z behavior when OE is pulled high via external resistor. Input clamp diodes and ±2000V HBM ESD rating support robust operation in telecom backplane environments subject to signal integrity and noise challenges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into 3.3V systems and compatibility with 2.5V/1.8V domains via undershoot/overshoot margin. |
| Input Voltage Tolerance | Up to 5.5V - allows interfacing with legacy 5V logic without external translators or voltage dividers. |
| Max Propagation Delay | 4.8ns at 3.3V - supports >100MHz bus signaling in point-to-point microwave backhaul timing paths. |
| Output Drive Strength | ±24mA at 3.0V - sufficient to drive 50Ω transmission lines or multiple LVC loads without signal degradation. |
| Operating Temperature | –40°C to 125°C - qualified for deployment in outdoor telecom shelters, RRUs, and power distribution units. |
| ESD Rating (HBM) | ±2000V - meets IEC 61000-4-2 Level 3 requirements for telecom equipment front-end interfaces. |
| Power Dissipation | 500mW max - supports continuous operation in compact TSSOP-14 packages with thermal derating above 60°C. |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body, 14-pin surface-mount, moisture sensitivity level 1, lead finish NiPdAu, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable input | Individually disables corresponding Y output to high-impedance state; tied to VCC via pullup for safe power sequencing. |
| 1A–4A | Buffer input | Accepts 5.5V-tolerant logic signals; compatible with both 3.3V and 5V source drivers. |
| 1Y–4Y | Noninverting buffered output | Delivers rail-to-rail CMOS output swing; drives up to ±24mA load current at 3V. |
| VCC (Pin 14) | Positive supply | Single supply rail for all four buffers; requires local 0.1μF bypass capacitor per TI layout guidelines. |
| GND (Pin 7) | Ground reference | Common return path for all I/O and supply currents; must be connected to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Enables selective bus segmentation - e.g., isolate one data lane in EPON OLT while keeping others active. |
| 5.5V-tolerant inputs on 3.3V supply | Eliminates need for discrete level translators in mixed-voltage telecom modules such as DSLAM line cards. |
| Low ground bounce (VOLP < 0.8V) | Reduces simultaneous switching noise in dense PCB layouts with multiple parallel buffers driving shared buses. |
| Latch-up immunity > 250mA | Ensures robustness against transient overcurrent events in DC/DC module monitoring circuits. |
| Wide temperature range (–40°C to 125°C) | Supports deployment in uncooled telecom shelters and remote radio units exposed to ambient extremes. |
Applications
| Optical Networking Line Card | Telecom Baseband Unit |
|---|---|
Use Scenario: Signal conditioning between FPGA I/O banks and SFP+ host interface in EPON OLT line cards. IC Role / Device Role / Timing Role: Bus buffer isolating 3.3V FPGA logic from 5V-compatible PHY transceivers while preserving signal integrity. Use Value: Enables direct 5V-tolerant connection without external level shifters, reducing BOM count and board area by 25% versus discrete solutions. |
Use Scenario: Data routing between ADC/DAC interfaces and DSP processors in wireless baseband processing units. IC Role / Device Role / Timing Role: Quadruple buffer providing controlled 3-state gating for time-multiplexed analog front-end sampling paths. Use Value: Delivers sub-5ns propagation delay and <1.5ns output skew, meeting strict timing budgets for LTE/5G IF sampling clocks. |
| Remote Radio Unit (RRU) | Power Distribution Unit (PDU) |
Use Scenario: Control signal buffering between BBIC and RF front-end ICs in outdoor-mounted RRUs. IC Role / Device Role / Timing Role: Level-translating buffer for GPIO and reset lines operating across –40°C to 125°C ambient range. Use Value: Maintains reliable logic thresholds and output drive strength across full temperature range, eliminating cold-start failures. |
Use Scenario: Isolating microcontroller GPIOs from relay driver circuits in telecom shelter PDUs. IC Role / Device Role / Timing Role: 3-state buffer preventing backfeed during hot-swap of power modules and enabling safe firmware updates. Use Value: High-impedance disable mode ensures zero current leakage into downstream relays during MCU reset sequences. |
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, TSSOP-14 tape-and-reel (2000 pcs) vs. SN74LVC125APWTE4's small tape-and-reel (250 pcs); identical electrical specs and marking. | Preferred for high-volume production runs requiring automated pick-and-place feeders. | Select SN74LVC125APWR for volume manufacturing; SN74LVC125APWTE4 suits prototyping, NPI, and low-MOQ builds. |
| 74LVC125AD | SOIC-14 package (8.6mm × 6mm), higher RθJA (127.8°C/W), no 5.5V input tolerance guarantee beyond datasheet limits. | Better suited for industrial control boards where thermal headroom exists and board space permits larger footprint. | Choose 74LVC125AD only if SOIC mechanical compatibility is required; avoid in thermally constrained telecom modules. |
Compared with SN74LVC125APWR, SN74LVC125APWTE4 offers identical performance in a smaller reel format ideal for engineering validation. Versus 74LVC125AD, it delivers superior thermal efficiency and guaranteed 5.5V input tolerance - critical for telecom infrastructure designs demanding reliability under voltage transients.
Availability
SN74LVC125APWTE4 is available at Aetrix Electronics and suitable for telecom baseband units, optical networking line cards, and remote radio units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74LVC125APWTE4 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 50 years of innovation in industrial and communications ICs.
The SN74LVC125APWTE4 belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interfacing in telecom, networking, and infrastructure equipment where voltage translation, noise immunity, and thermal resilience are critical.
FAQ
What is the maximum input voltage rating for SN74LVC125APWTE4?
The SN74LVC125APWTE4 supports input voltages up to 5.5V regardless of VCC level - a key feature enabling direct interfacing with 5V logic in mixed-voltage systems. This specification is explicitly guaranteed in Section 5.3 of the TI SCAS290T datasheet and applies across the full –40°C to 125°C operating range. No external clamping is required.
Does SN74LVC125APWTE4 support hot-swap or live-insertion applications?
Yes, SN74LVC125APWTE4 supports hot-swap applications due to its 5.5V-tolerant inputs and guaranteed high-impedance state during power transitions. When OE is pulled high via a resistor to VCC, outputs remain in 3-state before VCC stabilizes - preventing bus contention. This behavior is documented in Section 7.1 and Figure 8-4 of the official datasheet.
What is the recommended bypass capacitor for SN74LVC125APWTE4?
Texas Instruments recommends a 0.1μF ceramic bypass capacitor placed as close as possible to the VCC pin (Pin 14) of SN74LVC125APWTE4. For multi-VCC systems, a 0.01–0.022μF capacitor per supply pin is advised. This layout practice minimizes supply noise and is validated in Section 8.2 and Figure 8-4 of the SCAS290T datasheet.
Can SN74LVC125APWTE4 drive a 50Ω transmission line directly?
Yes, SN74LVC125APWTE4 can drive a 50Ω transmission line directly: at VCC = 3.0V, it delivers ±24mA output current (Section 5.3), supporting a 1.5V swing into 50Ω. However, series termination (e.g., 22–33Ω) is recommended to dampen reflections - a guideline confirmed in Section 8.1.2 of the TI datasheet.
Is SN74LVC125APWTE4 pin-compatible with other LVC125 variants?
Yes, SN74LVC125APWTE4 shares identical pinout and function mapping with all LVC125 family members in TSSOP-14 (PW) packaging, including SN74LVC125APWR and SN74LVC125APWT. Pin functions - including OE, A, Y, VCC, and GND - match exactly per Table 4-1 and Figures 4-1/4-2 in the SCAS290T datasheet.
SN74LVC125APWTE4 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
SN74LVC125APWTE4 FAQ
1.How can I place an order for SN74LVC125APWTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125APWTE4 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 SN74LVC125APWTE4 reliable?
The price and inventory of SN74LVC125APWTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125APWTE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC125APWTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125APWTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125APWTE4?
SN74LVC125APWTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125APWTE4 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 SN74LVC125APWTE4?
For technical support, including SN74LVC125APWTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125APWTE4 requirements.
6.How does Aetrix verify that SN74LVC125APWTE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125APWTE4 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 SN74LVC125APWTE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC125APWTE4?
All SN74LVC125APWTE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125APWTE4, 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 SN74LVC125APWTE4 part is unused and in its original packaging.
Return procedure for SN74LVC125APWTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC125APWTE4 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…
