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Texas Instruments SN74LVC125ADRG3
- Part No.:
- SN74LVC125ADRG3
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC125ADRG3.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,149
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Product details
Overview
SN74LVC125ADRG3 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 signal integrity and voltage compatibility are critical.
For engineers reviewing the SN74LVC125ADRG3 datasheet, SN74LVC125ADRG3 pinout, SN74LVC125ADRG3 application, or SN74LVC125ADRG3 equivalent, key selection criteria include 3-state output control per channel, 5.5V input tolerance enabling 3.3V/5V system interfacing, SOIC-14 package compatibility, and guaranteed operation up to 125°C ambient.
Technical Context
The SN74LVC125ADRG3 implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Each buffer passes A→Y when OE is low and enters high-impedance state when OE is high - enabling bidirectional bus sharing without contention.
Its CMOS design supports rail-to-rail input voltage tolerance (up to 5.5V), allowing direct connection to legacy 5V logic while powered from 3.3V or lower supplies. The device features controlled output slew rates, low ground bounce (<0.8V), and undershoot immunity (>2V VOHV), ensuring signal integrity in high-speed digital backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables interoperability across 1.8V, 2.5V, and 3.3V logic domains |
| Input Voltage Tolerance | Up to 5.5V - allows safe interfacing with 5V peripherals without external level shifters |
| Max Propagation Delay | 4.8ns at VCC = 3.3V - supports >100 MHz data rates in buffered address/data paths |
| Operating Temperature | –40°C to 125°C - qualified for telecom infrastructure and industrial embedded applications |
| Output Drive Strength | ±24mA at VCC = 3.0V - sufficient to drive 50Ω transmission lines or multiple CMOS loads |
| Power Dissipation | 500mW max (D package) - compatible with standard SOIC thermal management in dense PCB layouts |
| ESD Rating | ±2000V HBM - meets IEC 61000-4-2 Level 2 for robust handling in manufacturing and field environments |
Pinout & Package
SN74LVC125ADRG3 is packaged in a 14-pin SOIC (D) package measuring 8.6 mm × 6 mm, with 1.27 mm pitch and gull-wing leads. This industry-standard surface-mount package supports automated assembly and provides reliable thermal and mechanical performance in telecom and networking equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable input | Individually disables corresponding Y output into high-Z state; tie to VCC via pullup for power-up safety |
| 1A–4A | Buffer input | Noninverting data input for each of four channels; tolerant to 5.5V regardless of VCC |
| 1Y–4Y | Buffer output | 3-state noninverting output; drives bus or load only when OE is low |
| VCC | Positive supply | Single 1.65–3.6V supply for all logic and output stages; requires local 0.1μF bypass |
| GND | Ground reference | Common return path for all inputs, outputs, and internal circuitry; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Enables selective bus arbitration and dynamic load isolation without external logic |
| 5.5V-tolerant inputs on 1.65–3.6V supply | Eliminates need for discrete level translators in mixed-voltage FPGA/CPU interface designs |
| Low ground bounce & output undershoot | Typical VOLP < 0.8V and VOHV > 2V at 3.3V - reduces switching noise coupling into adjacent signals |
| Latch-up immunity > 250mA | Meets JESD17 - ensures robustness against transient overcurrent events in hot-plug or fault conditions |
| Wide temperature qualification | Specified from –40°C to 125°C - suitable for enclosed telecom shelters and outdoor wireless units |
Applications
| Telecom Baseband Units | Optical Networking Interfaces |
|---|---|
|
Use Scenario: Signal buffering between FPGA I/O banks and high-density serdes line cards in 5G base stations. IC Role / Device Role / Timing Role: Bidirectional bus isolator with per-lane 3-state control for dynamic resource allocation. Use Value: Prevents bus contention during reconfiguration; 5.5V input tolerance accommodates legacy control logic without voltage translation. |
Use Scenario: Level translation between 3.3V DSP processors and 5V analog front-end modules in EPON OLT line cards. IC Role / Device Role / Timing Role: Unidirectional voltage translator and drive booster for parallel control buses. Use Value: Enables direct interface to 5V DACs/ADCs while powered from 3.3V supply; 4.8ns tpd preserves timing margins. |
| Wireless Remote Radio Units | Industrial Power Monitoring Units |
|
Use Scenario: Isolating FPGA configuration buses from RF section power domains in RRU chassis. IC Role / Device Role / Timing Role: High-reliability bus buffer with fail-safe high-Z default during power sequencing. Use Value: Pullup-enabled OE pins ensure outputs remain high-Z at power-up/down - preventing backdrive damage to sensitive RF ICs. |
Use Scenario: Interfacing microcontroller GPIOs to isolated sensor buses in telecom PDUs and PMUs. IC Role / Device Role / Timing Role: Robust digital isolator for status/control signals in harsh EMI environments. Use Value: ±2000V HBM ESD rating and 125°C operation ensure long-term reliability in uncooled power cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125ADR | Identical electrical specs and SOIC-14 footprint; differs only in lead finish (NIPDAU vs SN) | No functional difference; both rated –40°C to 125°C and RoHS-compliant | Select SN74LVC125ADR if NIPDAU finish is required for specific solder process compatibility |
| 74LVC125ABQAR | Same logic function but in 3mm × 2.5mm WQFN-14 package; higher thermal performance (RθJA = 102.3°C/W) | Better suited for space-constrained, thermally demanding applications like small-cell radios | Choose 74LVC125ABQAR when board area or junction temperature budget is critical |
Compared with SN74LVC125ADR, SN74LVC125ADRG3 offers identical functionality with matte tin (SN) lead finish for enhanced solderability in nitrogen reflow; versus 74LVC125ABQAR, it trades compactness and thermal efficiency for easier inspection, rework, and legacy SOIC compatibility.
Availability
SN74LVC125ADRG3 is available at Aetrix Electronics and suitable for telecom baseband units, optical networking interfaces, and industrial power monitoring units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC125ADRG3 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 logic and interface ICs.
The SN74LVC125A family was developed to address voltage translation and bus isolation needs in next-generation telecom, networking, and industrial systems operating across 1.65V–3.6V supply rails.
FAQ
What is the maximum input voltage the SN74LVC125ADRG3 can tolerate?
The SN74LVC125ADRG3 accepts input voltages up to 5.5V regardless of its VCC supply voltage (1.65V–3.6V), making it ideal for interfacing 5V legacy components in modern low-voltage systems. This overvoltage tolerance is specified across the full operating temperature range and does not require external clamping diodes.
Does the SN74LVC125ADRG3 support hot-swap or live-insertion scenarios?
Yes - the SN74LVC125ADRG3 features robust ESD protection (±2000V HBM) and latch-up immunity exceeding 250mA per JESD17, supporting safe operation during hot-swap events. Its 3-state outputs also prevent bus contention when inserted into an active system, provided OE is pulled high during insertion.
How should unused inputs be handled on the SN74LVC125ADRG3?
All unused inputs on the SN74LVC125ADRG3 must be tied to a defined logic level - either VCC or GND - to prevent floating states that cause excessive current draw or unpredictable output behavior. TI recommends using pullup or pulldown resistors (typically 10kΩ) rather than direct connections for noise margin and test access.
What is the recommended bypass capacitor for the SN74LVC125ADRG3 VCC pin?
Texas Instruments recommends a 0.1μF ceramic capacitor placed as close as possible to the VCC pin of the SN74LVC125ADRG3, with short, low-inductance traces to GND. For boards with multiple VCC pins or high-noise environments, paralleling a 1μF capacitor improves low-frequency decoupling without compromising high-frequency response.
Is the SN74LVC125ADRG3 pin-compatible with older 74-series logic devices?
The SN74LVC125ADRG3 uses the standard SOIC-14 pinout defined for quad bus buffers (e.g., 74LS125, 74HC125), maintaining mechanical and electrical compatibility with legacy footprints. However, its 3.3V-centric design, 5.5V-tolerant inputs, and faster propagation delay differentiate its electrical behavior from bipolar or older CMOS variants.
SN74LVC125ADRG3 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:
- 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-SOIC
SN74LVC125ADRG3 FAQ
1.How can I place an order for SN74LVC125ADRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125ADRG3 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 SN74LVC125ADRG3 reliable?
The price and inventory of SN74LVC125ADRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125ADRG3 is usually 5 days.
3.What payment methods are accepted for SN74LVC125ADRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125ADRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125ADRG3?
SN74LVC125ADRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125ADRG3 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 SN74LVC125ADRG3?
For technical support, including SN74LVC125ADRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125ADRG3 requirements.
6.How does Aetrix verify that SN74LVC125ADRG3 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125ADRG3 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 SN74LVC125ADRG3 meets industry standards.
7.What is the process for return or replacement of SN74LVC125ADRG3?
All SN74LVC125ADRG3 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125ADRG3, 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 SN74LVC125ADRG3 part is unused and in its original packaging.
Return procedure for SN74LVC125ADRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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