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Texas Instruments SN74LVC125ANS
- Part No.:
- SN74LVC125ANS
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC125ANS.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:762
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Product details
Overview
SN74LVC125ANS 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 SN74LVC125ANS datasheet, SN74LVC125ANS pinout, SN74LVC125ANS application, or SN74LVC125ANS equivalent, key selection criteria include its independent OE control per channel, 3.6V max VCC, 5.5V input tolerance, 3-state output drive capability, and SOP-14 (NS) package compatibility with legacy board layouts.
Technical Context
The SN74LVC125ANS 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 enables bidirectional voltage translation: 3.3V outputs can interface with 5V logic inputs while accepting 5.5V signals on A inputs without damage.
Each buffer features balanced rise/fall times, low ground bounce (<0.8V typical VOLP), and undershoot immunity (>2V typical VOHV) at 3.3V. The device meets JESD17 latch-up specification (>250mA), supports Δt/Δv ≤8 ns/V input slew rate, and requires OE pull-up during power sequencing to ensure defined startup state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V–3.6V - enables interoperability across 1.8V, 2.5V, and 3.3V logic domains |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to 5V legacy peripherals without external level shifters |
| Max Propagation Delay | 4.8ns at 3.3V - supports >200MHz data rates in point-to-point bus applications |
| Operating Temperature | –40°C to 125°C - qualified for telecom shelter power monitoring units and remote radio units |
| Output Drive Strength | ±24mA at 3.0V - sufficient to drive 50Ω transmission lines or multiple CMOS loads |
| ESD Rating (HBM) | ±2000V - meets industrial handling requirements without additional protection circuitry |
| Power Dissipation Cap | 500mW at TA ≤125°C - supports continuous operation in compact telecom modules with limited airflow |
Pinout & Package
The SN74LVC125ANS uses a 14-pin SOP (NS) package with 10.2mm × 7.8mm body size and standard 1.27mm lead pitch. Pin 1 is marked via notch or bevel; leads are gull-wing shaped and RoHS-compliant NIPDAU-finished.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Input | Independent 3-state enable per buffer - LOW activates pass-through (A→Y), HIGH forces high-Z |
| 1A–4A | Input | Data inputs tolerant to 5.5V - compatible with 5V microcontrollers or FPGAs driving 3.3V buses |
| 1Y–4Y | Output | Noninverting buffered outputs with ±24mA drive - suitable for fanout to multiple downstream receivers |
| VCC (Pin 14) | Power | Single supply rail - must be bypassed with 0.1μF capacitor near pin to suppress switching noise |
| GND (Pin 7) | Ground | Common reference - connects to system ground plane; critical for signal integrity and EMI control |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel OE | Enables selective bus segmentation - e.g., isolate one memory channel while keeping others active |
| 5.5V-tolerant inputs | Eliminates need for discrete level translators when interfacing 5V sensors or legacy controllers |
| Low ground bounce (VOLP < 0.8V) | Reduces simultaneous switching noise in dense PCB layouts with shared ground returns |
| Wide temperature range (–40°C to 125°C) | Supports deployment in outdoor telecom shelters and remote radio units without derating |
| Latch-up immunity (>250mA) | Ensures robustness against transient overcurrent events in unregulated power environments |
Applications
| Telecom Baseband Unit | Optical Networking Line Card |
|---|---|
|
Use Scenario: Isolating FPGA I/O banks from backplane data buses in multi-standard wireless base stations. IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-lane OE control - manages signal integrity between 3.3V FPGA and 5V legacy PHY interfaces. Use Value: Prevents bus contention during hot-swap events and enables dynamic lane shutdown to reduce system power by 12%. |
Use Scenario: Level-shifting control signals between 2.5V SERDES ASICs and 5V optical module management ICs. IC Role / Device Role / Timing Role: Input-tolerant noninverting buffer - translates management bus commands without adding propagation delay skew. Use Value: Achieves <4.8ns tpd consistency across all four channels, maintaining timing margin for 10G EPON synchronization. |
| Remote Radio Unit (RRU) | Power Distribution Unit (PDU) |
|
Use Scenario: Buffering ADC/DAC control lines in wide-temperature RF front-end modules mounted on cell towers. IC Role / Device Role / Timing Role: High-reliability 3-state gate - ensures clean signal transitions under thermal cycling and vibration stress. Use Value: Maintains VIH/VIL margins across –40°C to 125°C, eliminating false triggering in analog calibration sequences. |
Use Scenario: Isolating microcontroller GPIOs from relay driver circuits in telecom shelter power distribution panels. IC Role / Device Role / Timing Role: Robust digital isolator - withstands 5.5V transients from inductive load switching without latch-up. Use Value: Replaces discrete MOSFET+resistor solutions, reducing BOM count by 3 components per channel and improving layout density. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125ADRG4 | SOIC-14 package (D), identical electrical specs, same 10.3mm × 5.3mm body but wider 8.65mm × 3.91mm footprint | Compatible with legacy SOIC footprints; requires PCB rework if replacing NS-package SN74LVC125ANS | Select when upgrading existing D-package designs or requiring higher thermal resistance (RθJA = 127.8°C/W vs NS's 123.8°C/W) |
| SN74LVC125APWR | TSSOP-14 package (PW), identical logic function, 5.00mm × 4.40mm body, 0.65mm lead pitch | Higher pin density; unsuitable for hand-soldering or through-hole prototyping | Choose for space-constrained optical modules where 30% smaller footprint offsets slightly lower current drive (±24mA same, but RθJA = 150.8°C/W) |
Compared with SN74LVC125ADRG4 and SN74LVC125APWR, the SN74LVC125ANS offers optimal balance of legacy SOP-14 manufacturability, thermal performance (RθJA = 123.8°C/W), and drop-in compatibility with existing NS-footprint designs in telecom infrastructure.
Availability
SN74LVC125ANS 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 production lifecycles.
Supply support for SN74LVC125ANS 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 logic solutions with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74LVC125ANS belongs to TI's LVC logic family - engineered for low-voltage operation (1.65V–3.6V), high noise immunity, and seamless integration into mixed-signal telecom infrastructure platforms.
FAQ
What is the maximum input voltage the SN74LVC125ANS can tolerate?
The SN74LVC125ANS accepts input voltages up to 5.5V regardless of VCC level - a key feature enabling direct interfacing with 5V logic without external level shifters. This tolerance is specified across the full operating temperature range (–40°C to 125°C) and applies to all A-input pins (1A–4A). The device maintains this rating even when VCC is as low as 1.65V, making SN74LVC125ANS ideal for voltage translation in heterogeneous systems.
Does the SN74LVC125ANS require external pull-up resistors on OE pins?
Yes - to ensure a defined high-impedance state during power-up or power-down, each OE pin (1OE–4OE) of the SN74LVC125ANS must be tied to VCC via an external pull-up resistor. The minimum resistance value depends on the current-sourcing capability of the driving source; TI recommends values between 10kΩ and 100kΩ for most applications. Leaving OE floating risks undefined output states and potential bus contention.
What is the propagation delay of the SN74LVC125ANS at 2.5V supply?
At VCC = 2.5V ± 0.2V and TA = 25°C, the SN74LVC125ANS exhibits a typical propagation delay (tpd) of 2.7ns with a maximum of 6.3ns across the –40°C to 85°C range. This delay is measured from A to Y under standard load conditions (CL = 30pF), confirming SN74LVC125ANS suitability for sub-200MHz digital interfaces in telecom baseband processing.
Can the SN74LVC125ANS drive a 50Ω transmission line directly?
Yes - the SN74LVC125ANS provides ±24mA output drive at 3.0V, sufficient to drive a 50Ω terminated line (requiring ~20mA for 1V swing). However, series termination (e.g., 33Ω) is recommended to dampen reflections and control edge rates, especially at frequencies above 50MHz. The device's low ground bounce (<0.8V) helps maintain signal integrity in such configurations.
Is the SN74LVC125ANS pin-compatible with other LVC125 variants?
Yes - all SN74LVC125x variants (including SN74LVC125ANS, SN74LVC125ADRG4, and SN74LVC125APWR) share identical pin functions and logic behavior. The SN74LVC125ANS uses the SOP-14 (NS) package with 10.2mm × 7.8mm dimensions, differing only in mechanical form factor from SOIC-14 (D) and TSSOP-14 (PW) versions - electrical and functional compatibility is maintained across all packages.
SN74LVC125ANS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SO
SN74LVC125ANS FAQ
1.How can I place an order for SN74LVC125ANS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125ANS 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 SN74LVC125ANS reliable?
The price and inventory of SN74LVC125ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125ANS is usually 5 days.
3.What payment methods are accepted for SN74LVC125ANS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125ANS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125ANS?
SN74LVC125ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125ANS 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 SN74LVC125ANS?
For technical support, including SN74LVC125ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125ANS requirements.
6.How does Aetrix verify that SN74LVC125ANS is sourced from the original manufacturer or authorized distributors?
All SN74LVC125ANS 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 SN74LVC125ANS meets industry standards.
7.What is the process for return or replacement of SN74LVC125ANS?
All SN74LVC125ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125ANS, 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 SN74LVC125ANS part is unused and in its original packaging.
Return procedure for SN74LVC125ANS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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