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Texas Instruments SN74LVC125ADRE4
- Part No.:
- SN74LVC125ADRE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC125ADRE4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
SN74LVC125ADRE4 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, 5.5V-tolerant inputs, 4.8ns max propagation delay at 3.3V, and operation across –40°C to 125°C - enabling use in telecom baseband units and optical networking interfaces.
For engineers reviewing the SN74LVC125ADRE4 datasheet, SN74LVC125ADRE4 pinout, SN74LVC125ADRE4 application, or SN74LVC125ADRE4 equivalent, this page delivers verified package mapping (SOIC-14), confirmed 3-state logic behavior, input overvoltage tolerance, thermal derating data, and real-world telecom infrastructure use cases - all grounded in TI's official SCAS290T revision T documentation.
Technical Context
The SN74LVC125ADRE4 implements CMOS-based noninverting buffer logic with per-channel 3-state control: each Y output follows its A input when the corresponding OE is low, and enters high-impedance when OE is high. Its input structure accepts up to 5.5V regardless of VCC (1.65V–3.6V), enabling robust 3.3V/5V mixed-voltage interfacing without external level shifters.
Designed for signal integrity in high-speed digital buses, it delivers <0.8V typical ground bounce (VOLP) and >2V typical undershoot immunity (VOHV) at 3.3V/25°C, while meeting JESD17 latch-up immunity (>250mA) and ±2000V HBM ESD rating - critical for deployment in cable modem termination systems and wireless infrastructure equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - supports single-supply operation in modern low-voltage digital systems including LDO-powered telecom modules. |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to legacy 5V logic without clamping diodes or external translators. |
| Max Propagation Delay | 4.8ns at 3.3V - enables reliable timing in ≤200MHz bus applications such as EPON line cards and RRU control interfaces. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood telecom shelters, remote radio units, and industrial power distribution units. |
| Output Drive Strength | ±24mA at 3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads without buffering. |
| Power Dissipation | 500mW max (derates above 70°C for SOIC) - compatible with thermally constrained PCB layouts in dense optical module designs. |
| ESD Rating | ±2000V HBM - meets IEC 61000-4-2 system-level surge immunity requirements for field-deployable telecom hardware. |
Pinout & Package
SN74LVC125ADRE4 is packaged in a 14-pin SOIC (D) package measuring 8.6 mm × 6 mm, with body size 8.65 mm × 3.91 mm and RoHS-compliant NiPdAu lead finish. The device uses standard SOIC pinout geometry and is rated MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Input (active-low enable) | Independent per-channel 3-state control; tie high via pullup to ensure Hi-Z during power-up/down sequences. |
| 1A–4A | Input | Data inputs for respective buffers; tolerant to 5.5V regardless of VCC voltage. |
| 1Y–4Y | Output | Noninverting buffered outputs; capable of sourcing/sinking ±24mA at 3V with controlled edge rates. |
| GND (Pin 7) | Ground reference | Common return path for all four channels; must be low-inductance for stable 3-state transitions. |
| VCC (Pin 14) | Supply rail | Single positive supply (1.65–3.6V); requires local 0.1µF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel 3-state control | Enables selective bus isolation - e.g., disable only one channel during hot-swap events without affecting others. |
| 5.5V-tolerant inputs | Eliminates need for external level-shifting circuitry when interfacing with 5V microcontrollers or legacy peripherals. |
| Low ground bounce (VOLP < 0.8V) | Reduces noise coupling into adjacent analog sections in mixed-signal telecom baseband units. |
| High-impedance state assurance | Pullup resistor on OE pins ensures fail-safe Hi-Z during power sequencing - critical for backplane hot-plug compliance. |
| Latch-up immunity >250mA | Guarantees robustness against transient current surges in DC/DC module monitoring circuits. |
Applications
| Telecom Baseband Units | Optical Networking (EPON) |
|---|---|
Use Scenario: Signal routing between FPGA I/O banks and SFP+ module control interfaces in base station baseband processing units. IC Role / Device Role / Timing Role: Bus buffer isolating configuration registers and status lines during dynamic reconfiguration cycles. Use Value: Per-channel OE control allows selective isolation of clock/data paths without disrupting active links - improving system uptime and reducing bit error rate during firmware updates. |
Use Scenario: Interfacing GPON OLT MAC controller with analog front-end ASICs in fiber access terminals. IC Role / Device Role / Timing Role: Level-translating and buffering management bus signals (I²C, SPI) between 3.3V SoC and 5V analog subsystems. Use Value: 5.5V-tolerant inputs eliminate external translators, reducing BOM count and PCB area in space-constrained EPON line cards. |
| Remote Radio Units (RRU) | Power Distribution Units (PDU) |
Use Scenario: Isolating FPGA GPIOs from RF front-end bias control lines in LTE/5G RRUs deployed on cell towers. IC Role / Device Role / Timing Role: 3-state buffer enabling safe hot-swap of RF calibration data streams without disturbing active transmit paths. Use Value: Guaranteed Hi-Z state during power ramp-up prevents false triggering of GaN amplifier enable pins - avoiding catastrophic RF stage damage. |
Use Scenario: Monitoring and controlling relay drivers in telecom shelter PDUs where microcontroller I/O must interface with 5V sensor buses. IC Role / Device Role / Timing Role: Bidirectional bus buffer translating control commands and status feedback between 3.3V MCU and 5V power monitoring ICs. Use Value: ±24mA drive strength supports direct driving of optocoupler inputs, eliminating discrete transistor stages and improving PDU response time. |
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 silicon, identical electrical specs, SOIC-14 packaging, but with standard NiPdAu (not matte Sn) lead finish and no E4 suffix. | No functional difference; both support –40°C to 125°C and same thermal derating. | Select SN74LVC125ADR if matte tin (Sn) finish is not required for solderability or RoHS compliance verification. |
| 74LVC125APWRE4 | TSSOP-14 package (5.0mm × 6.4mm), same logic function and specs, but smaller footprint and higher thermal resistance (RθJA = 150.8°C/W vs. 127.8°C/W). | Better suited for space-constrained optical modules; requires tighter thermal management due to lower power dissipation margin. | Choose 74LVC125APWRE4 only when board area is critical and ambient temperature remains below 85°C. |
Compared with SN74LVC125ADR and 74LVC125APWRE4, SN74LVC125ADRE4 offers identical functionality with matte tin (Sn) lead finish for enhanced solder joint reliability in high-reliability telecom deployments - making it preferred for long-lifecycle infrastructure where intermetallic growth and whisker risk must be minimized.
Availability
SN74LVC125ADRE4 is available at Aetrix Electronics and suitable for telecom baseband units, optical networking equipment, and remote radio units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC125ADRE4 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 decades of experience in high-reliability industrial and communications ICs.
The SN74LVC125ADRE4 belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interface applications in telecom infrastructure, optical modules, and industrial control systems where mixed-voltage compatibility and robust 3-state control are essential.
FAQ
What is the maximum operating temperature for SN74LVC125ADRE4?
The SN74LVC125ADRE4 is fully specified from –40°C to +125°C, with validated performance across this full range per TI's SCAS290T datasheet. Its SOIC package has a junction-to-ambient thermal resistance (RθJA) of 127.8°C/W, and power dissipation derates linearly above 70°C at 8 mW/K - ensuring reliable operation in telecom shelters and remote radio units exposed to elevated ambient temperatures.
Does SN74LVC125ADRE4 support 5V input signals?
Yes, SN74LVC125ADRE4 features 5.5V-tolerant inputs, meaning it safely accepts input voltages up to 5.5V regardless of VCC (1.65V–3.6V). This capability is explicitly confirmed in Section 5.3 of the TI datasheet and enables direct interfacing with 5V microcontrollers, legacy peripherals, or sensor outputs without external level-shifting components - a key advantage in mixed-voltage telecom baseband designs.
How does the 3-state control work on SN74LVC125ADRE4?
Each of the four buffer channels in SN74LVC125ADRE4 has an independent active-low output-enable (OE) input. When OE is low, the corresponding Y output follows the A input (noninverting). When OE is high, the Y output enters high-impedance (Hi-Z) state. To guarantee Hi-Z during power-up/power-down, TI recommends tying each OE to VCC via a pullup resistor - minimum value determined by the driver's current-sourcing capability per Section 3 of the datasheet.
What is the propagation delay of SN74LVC125ADRE4 at 3.3V?
At VCC = 3.3V ± 0.3V and TA = 25°C, the maximum propagation delay (tpd) of SN74LVC125ADRE4 is 4.6ns, with a typical value of 2.5ns. Over the full operating temperature range (–40°C to 125°C), the worst-case tpd increases to 6.0ns - verified in Table 5-6 of TI's SCAS290T datasheet. This performance supports reliable operation in sub-200MHz digital buses used in EPON and xDSL applications.
Is SN74LVC125ADRE4 RoHS compliant and what is its moisture sensitivity level?
Yes, SN74LVC125ADRE4 is RoHS compliant (lead-free) with NiPdAu lead finish and carries MSL Level-1 (260°C peak reflow, unlimited floor life) per JEDEC J-STD-020. This rating is confirmed in TI's Package Option Addendum and eliminates bake requirements prior to assembly - simplifying manufacturing for high-volume telecom equipment producers.
SN74LVC125ADRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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-SOIC
SN74LVC125ADRE4 FAQ
1.How can I place an order for SN74LVC125ADRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125ADRE4 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 SN74LVC125ADRE4 reliable?
The price and inventory of SN74LVC125ADRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125ADRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC125ADRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125ADRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125ADRE4?
SN74LVC125ADRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125ADRE4 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 SN74LVC125ADRE4?
For technical support, including SN74LVC125ADRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125ADRE4 requirements.
6.How does Aetrix verify that SN74LVC125ADRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125ADRE4 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 SN74LVC125ADRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC125ADRE4?
All SN74LVC125ADRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125ADRE4, 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 SN74LVC125ADRE4 part is unused and in its original packaging.
Return procedure for SN74LVC125ADRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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