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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74ALVC125NS

Name: SN74ALVC125NS
Brand: Texas Instruments
SKU: SN74ALVC125NS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVC125NS

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: SN74ALVC125NS.pdf

Description:: IC BUFFER NON-INVERT 3.6V 14SO

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Product details

Overview

SN74ALVC125NS from ON Semiconductor is a low-voltage CMOS quad non-inverting buffer with 3-state outputs, designed for 1.2 V to 3.6 V operation and featuring 5.5 V-tolerant inputs/outputs. It delivers ±24 mA output drive, supports live insertion/withdrawal, and exhibits near-zero static supply current (10 µA typical). It is used in memory address driving and TTL-level bus transceiver applications.

For engineers reviewing the SN74ALVC125NS datasheet, SN74ALVC125NS pinout, SN74ALVC125NS application, or SN74ALVC125NS equivalent, key selection considerations include 5 V tolerance on 1.2–3.6 V rails, 3-state enable control per channel, propagation delay down to 1.0 ns at 3.0–3.6 V, and SOIC-14 package compatibility with industrial temperature range (−40 °C to +125 °C).

Technical Context

The SN74ALVC125NS implements four independent non-inverting buffers, each with dedicated active-low output enable (OEn) control. Each channel transitions between HIGH, LOW, and high-impedance states based on input logic level and corresponding OE signal state.

Its I_OFF specification ensures high-impedance outputs when V_CC = 0 V, enabling safe live insertion. Input leakage is ≤±0.1 µA at V_I = 5.5 V or GND, and dynamic switching performance includes t_pd ≤ 4.8 ns (max), t_en ≤ 7.0 ns (max), and t_dis ≤ 6.0 ns (max) at V_CC = 3.0–3.6 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.2 V to 3.6 V - Enables direct interface with modern low-voltage microcontrollers and FPGAs without level translation.
Input Voltage Tolerance	−0.5 V to +5.5 V - Allows safe connection to legacy 5 V TTL logic without external clamping or resistors.
Output Drive	±24 mA - Sufficient to drive multiple LVTTL or LVCMOS loads or short PCB traces without buffering.
Propagation Delay	1.0 ns (min) to 4.8 ns (max) at V_CC = 3.0–3.6 V - Supports >100 MHz data rates in point-to-point or lightly loaded bus configurations.
Static Supply Current	10 µA typical - Minimizes quiescent power in battery-powered or always-on systems.
Operating Temperature	−40 °C to +125 °C - Qualified for industrial and extended-temperature embedded applications.
ESD Rating	HBM >2000 V - Provides robust handling during board assembly and field service.

Pinout & Package

SN74ALVC125NS is supplied in a 14-pin SOIC package (Case 751A), with 1.27 mm pitch, 8.55–8.75 mm body width, and 3.80–4.00 mm body length. Pin 1 is marked by a beveled corner or notch.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	OEn (Active-Low Output Enable)	Per-channel 3-state control: HIGH disables output (Z), LOW enables non-inverting pass-through.
2, 5, 9, 12	Dn (Data Input)	CMOS-compatible input with 5.5 V tolerance; no external pull-up/down required for TTL interfacing.
3, 6, 8, 11	On (3-State Output)	Buffered, non-inverting output capable of sourcing/sinking ±24 mA; high-Z when corresponding OEn = HIGH.
7	GND	Ground reference for all logic and I/O; must be low-impedance and decoupled locally.
14	V_CC	Single supply rail (1.2–3.6 V); powers internal logic and output drivers; requires local 0.1 µF ceramic decoupling.

Key Features

Feature	Design Value
5.5 V tolerant I/O	Eliminates need for external level shifters when interfacing with 5 V controllers or peripherals.
I_OFF protection	Guarantees high-impedance outputs during power-down or hot-swap events, preventing back-driving.
Low ICC in all states	Reduces system-level standby power-critical for IoT edge nodes and portable instrumentation.
Live insertion support	Enables modular backplane designs where cards can be added/removed without powering down the host.
High noise immunity	TTL-compatible thresholds and low input leakage (<±0.1 µA) improve reliability in electrically noisy environments.

Applications

Memory Address Buffering	Bus Isolation in Industrial PLCs
Use Scenario: Driving address lines from an FPGA to multiple SRAM or flash devices sharing a common bus. IC Role / Device Role / Timing Role: Quad buffer isolates FPGA outputs, prevents loading-induced timing skew, and provides 3-state control for bus arbitration. Use Value: Enables clean address propagation across 4-bit segments with <4.8 ns propagation delay and 5 V-tolerant inputs for mixed-voltage memory interfaces.	Use Scenario: Isolating communication bus segments between CPU and I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as bidirectional bus driver with per-channel enable, allowing selective module activation without contention. Use Value: Supports hot-swappable I/O modules via I_OFF and live-insertion capability while maintaining signal integrity up to 100 MHz.
Low-Power Sensor Interface Hub	TTL-Level Logic Translation
Use Scenario: Aggregating digital sensor outputs (e.g., temperature, pressure) into a microcontroller with limited GPIO count. IC Role / Device Role / Timing Role: Buffers and gates sensor signals using individual OE controls, reducing MCU pin load and enabling sleep-mode isolation. Use Value: Delivers <10 µA quiescent current and 5.5 V-tolerant inputs-ideal for battery-operated sensor concentrators interfacing 5 V sensors.	Use Scenario: Converting 5 V TTL control signals (e.g., from legacy test equipment) to 1.8 V or 3.3 V logic levels for modern SoCs. IC Role / Device Role / Timing Role: Functions as unidirectional level translator with non-inverting logic and 3-state flexibility for shared-bus scenarios. Use Value: Eliminates discrete resistor-divider networks or dedicated translators-reducing BOM count and layout area while preserving timing margins.

Memory Address Buffering

Bus Isolation in Industrial PLCs

Use Scenario: Driving address lines from an FPGA to multiple SRAM or flash devices sharing a common bus.

IC Role / Device Role / Timing Role: Quad buffer isolates FPGA outputs, prevents loading-induced timing skew, and provides 3-state control for bus arbitration.

Use Value: Enables clean address propagation across 4-bit segments with <4.8 ns propagation delay and 5 V-tolerant inputs for mixed-voltage memory interfaces.

Use Scenario: Isolating communication bus segments between CPU and I/O modules in programmable logic controllers.

IC Role / Device Role / Timing Role: Acts as bidirectional bus driver with per-channel enable, allowing selective module activation without contention.

Use Value: Supports hot-swappable I/O modules via I_OFF and live-insertion capability while maintaining signal integrity up to 100 MHz.

Low-Power Sensor Interface Hub

TTL-Level Logic Translation

Use Scenario: Aggregating digital sensor outputs (e.g., temperature, pressure) into a microcontroller with limited GPIO count.

IC Role / Device Role / Timing Role: Buffers and gates sensor signals using individual OE controls, reducing MCU pin load and enabling sleep-mode isolation.

Use Value: Delivers <10 µA quiescent current and 5.5 V-tolerant inputs-ideal for battery-operated sensor concentrators interfacing 5 V sensors.

Use Scenario: Converting 5 V TTL control signals (e.g., from legacy test equipment) to 1.8 V or 3.3 V logic levels for modern SoCs.

IC Role / Device Role / Timing Role: Functions as unidirectional level translator with non-inverting logic and 3-state flexibility for shared-bus scenarios.

Use Value: Eliminates discrete resistor-divider networks or dedicated translators-reducing BOM count and layout area while preserving timing margins.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APW	TSSOP-14 package (4.4 × 5.0 mm), higher thermal resistance (100 °C/W), identical electrical specs.	Better suited for space-constrained PCBs but requires tighter layout control for thermal management.	Select when board area is critical and thermal derating is acceptable.
74ALVC125MTCX	Same SOIC-14 package, but manufactured by ON Semiconductor under alternate part numbering; identical pinout and specs per datasheet rev. 0.	No functional or application difference-fully interchangeable in existing designs.	Choose for supply chain diversification without design change.

Compared with SN74ALVC125NS, SN74LVC125APW offers smaller footprint at the cost of thermal performance, while 74ALVC125MTCX provides identical functionality in the same SOIC-14 package-making it a seamless second-source option for continuity planning.

Availability

SN74ALVC125NS is available at Aetrix Electronics and suitable for memory address driving, industrial bus isolation, and low-power sensor interface applications requiring stable component supply across automotive-grade temperature ranges and long-life production programs.

Supply support for SN74ALVC125NS 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The SN74ALVC125NS belongs to the ALVC (Advanced Low-Voltage CMOS) logic family, engineered for high-speed, low-power, mixed-voltage interoperability in industrial control and embedded computing systems.

FAQ

What is the maximum input voltage rating for SN74ALVC125NS?

The SN74ALVC125NS supports DC input voltages from −0.5 V to +5.5 V, regardless of V_CC level. This 5.5 V tolerance allows safe interfacing with 5 V TTL outputs without external protection circuitry, even when operating from a 1.2 V or 1.8 V supply rail.

Does SN74ALVC125NS support hot-swap or live-insertion applications?

Yes, SN74ALVC125NS supports live insertion and withdrawal due to its I_OFF specification, which guarantees high-impedance outputs when V_CC = 0 V. This prevents back-current flow and signal contention during card insertion/removal in modular backplane systems.

What is the output drive strength of SN74ALVC125NS at 3.3 V supply?

At V_CC = 3.3 V, SN74ALVC125NS delivers ±24 mA output sink/source current. Specifically, it sources −24 mA (VOH ≥ 2.2 V) and sinks +24 mA (VOL ≤ 0.55 V) under defined load conditions, sufficient to drive multiple LVTTL loads or moderate PCB trace capacitance.

Can SN74ALVC125NS operate reliably at −40 °C?

Yes, SN74ALVC125NS is fully specified and tested over the industrial temperature range of −40 °C to +125 °C. All AC and DC parameters-including propagation delay, output drive, and input thresholds-are guaranteed across this full range, making it suitable for outdoor and factory-floor deployments.

Is SN74ALVC125NS RoHS compliant and lead-free?

Yes, SN74ALVC125NS is Pb-free, halogen-free/BFR-free, and RoHS compliant per EU Directive 2011/65/EU. The "G" suffix in ordering codes (e.g., SN74ALVC125NSR) explicitly denotes lead-free packaging, verified through ON Semiconductor's material declarations and third-party testing.

SN74ALVC125NS Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVC

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 ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

SN74ALVC125NS FAQ

1.How can I place an order for SN74ALVC125NS through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVC125NS 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 SN74ALVC125NS reliable?

The price and inventory of SN74ALVC125NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC125NS is usually 5 days.

3.What payment methods are accepted for SN74ALVC125NS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC125NS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ALVC125NS?

SN74ALVC125NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVC125NS 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 SN74ALVC125NS?

For technical support, including SN74ALVC125NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC125NS requirements.

6.How does Aetrix verify that SN74ALVC125NS is sourced from the original manufacturer or authorized distributors?

All SN74ALVC125NS 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 SN74ALVC125NS meets industry standards.

7.What is the process for return or replacement of SN74ALVC125NS?

All SN74ALVC125NS units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC125NS, 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 SN74ALVC125NS part is unused and in its original packaging.

Return procedure for SN74ALVC125NS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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