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

onsemi MC74LVX125MELG

Name: MC74LVX125MELG
Brand: onsemi
SKU: MC74LVX125MELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74LVX125MELG

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: MC74LVX125MELG.pdf

Description:: IC BUF NON-INVERT 3.6V SOEIAJ-14

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Product details

Overview

MC74LVX125MELG from onsemi is a quad 3-state bus buffer with 5 V-tolerant inputs, designed for level-shifting between 3.3 V and 5.0 V logic domains in digital interface circuits. It features 4.4 ns typical propagation delay at V_CC = 3.3 V, ±25 mA output drive, and operates across −40 °C to +85 °C. It is used in bidirectional data bus isolation in microcontroller peripheral interfaces.

For engineers reviewing the MC74LVX125MELG datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V input tolerance, 3-state timing (t_PZL/t_PHZ ≤ 7.5 ns), low ICC (4 µA max), noise immunity (V_OLP ≤ 0.5 V), and SOIC-14/TSSOP-14 package compatibility.

Technical Context

The MC74LVX125MELG implements four independent non-inverting buffers, each with dedicated active-low 3-state enable (OE_n). Its CMOS design ensures balanced t_PLH/t_PHL propagation delays and supports mixed-voltage system interfacing via 6.5 V absolute maximum input voltage rating.

It uses advanced high-speed CMOS process technology enabling operation down to 2.0 V supply while maintaining 5 V-tolerant inputs. Input power-down protection prevents current flow when inputs exceed V_CC, and latchup performance exceeds 300 mA per JEDEC JESD78.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.0 V to 3.6 V - Enables direct integration into 3.3 V systems without level translators.
Input Voltage Max	6.5 V - Allows safe connection to 5 V buses without external clamping or resistors.
t_PD (Typ)	4.4 ns at V_CC = 3.3 V, CL = 15 pF - Supports >100 MHz bus toggling in short trace applications.
I_OUT	±25 mA per output - Sufficient to drive standard TTL loads or multiple CMOS inputs.
I_CC (Max)	4 µA at T_A = 25 °C - Enables ultra-low static power in battery-backed or always-on control logic.
V_OL (Max)	0.1 V at I_OL = 4 mA - Ensures robust low-level noise margin in noisy industrial environments.
Operating Temp	−40 °C to +85 °C - Qualified for industrial-grade embedded control and automotive body electronics.

Pinout & Package

MC74LVX125MELG is available in Pb-free SOIC-14 NB (Case 751A) and TSSOP-14 (Case 948G) packages. Pin numbering follows standard 14-lead top-view layout with Pin 1 marked by notch or dot.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	OEn (Output Enable)	Active-High enable control per channel; drives output to high-Z when low.
2, 5, 9, 12	Dn (Data Input)	Non-inverting input; accepts 0–6.5 V signals regardless of V_CC.
3, 6, 8, 11	On (Output)	CMOS push-pull output; sinks or sources up to ±25 mA.
7	GND	Ground reference for all inputs, outputs, and internal circuitry.
14	V_CC	Positive supply rail (2.0–3.6 V); powers internal logic and output stage.

Key Features

Feature	Design Value
5 V-tolerant inputs	Supports direct connection to legacy 5 V logic without external voltage translation.
Low dynamic noise (V_OLP ≤ 0.5 V)	Reduces crosstalk and ground bounce in dense PCB layouts with shared return paths.
Balanced propagation delays	Minimizes skew between channels (<1.5 ns), critical for synchronous bus integrity.
Power-down input protection	Prevents back-driving and leakage when inputs float or exceed V_CC, enhancing system reliability.
Pb-free & RoHS compliant	Meets global environmental compliance requirements for industrial and consumer manufacturing.

Applications

Microcontroller Bus Isolation	Industrial Sensor Interface
Use Scenario: Isolating GPIO-expander or ADC data lines from a 3.3 V MCU while connecting to 5 V sensor modules. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-channel 3-state control enables selective bus partitioning and hot-swap readiness. Use Value: Eliminates need for discrete level shifters; 4.4 ns t_PD preserves timing margins in 20+ MHz SPI/I²C auxiliary buses.	Use Scenario: Interfacing analog front-end ICs with 5 V analog supplies to 3.3 V digital controllers in PLC I/O modules. IC Role / Device Role / Timing Role: Voltage-tolerant input buffer isolates mixed-supply domains and prevents latchup during power sequencing. Use Value: 6.5 V input rating allows direct connection to 5 V sensor logic outputs; ±25 mA drive supports long traces to remote terminals.
Legacy System Upgrades	Test Equipment Signal Conditioning
Use Scenario: Retrofitting older 5 V industrial controllers with modern 3.3 V FPGAs or SoCs while retaining existing peripheral boards. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control facilitates phased migration without full board redesign. Use Value: Pin- and function-compatible with industry-standard 74-series logic; no firmware or layout changes required for drop-in replacement.	Use Scenario: Driving multiple test points or calibration DACs from a single FPGA I/O bank in automated test equipment. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensures synchronized signal delivery across parallel measurement channels. Use Value: <1.5 ns output-to-output skew maintains phase coherence in multi-channel timing-critical stimulus generation.

Microcontroller Bus Isolation

Industrial Sensor Interface

Use Scenario: Isolating GPIO-expander or ADC data lines from a 3.3 V MCU while connecting to 5 V sensor modules.

IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-channel 3-state control enables selective bus partitioning and hot-swap readiness.

Use Value: Eliminates need for discrete level shifters; 4.4 ns t_PD preserves timing margins in 20+ MHz SPI/I²C auxiliary buses.

Use Scenario: Interfacing analog front-end ICs with 5 V analog supplies to 3.3 V digital controllers in PLC I/O modules.

IC Role / Device Role / Timing Role: Voltage-tolerant input buffer isolates mixed-supply domains and prevents latchup during power sequencing.

Use Value: 6.5 V input rating allows direct connection to 5 V sensor logic outputs; ±25 mA drive supports long traces to remote terminals.

Legacy System Upgrades

Test Equipment Signal Conditioning

Use Scenario: Retrofitting older 5 V industrial controllers with modern 3.3 V FPGAs or SoCs while retaining existing peripheral boards.

IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control facilitates phased migration without full board redesign.

Use Value: Pin- and function-compatible with industry-standard 74-series logic; no firmware or layout changes required for drop-in replacement.

Use Scenario: Driving multiple test points or calibration DACs from a single FPGA I/O bank in automated test equipment.

IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensures synchronized signal delivery across parallel measurement channels.

Use Value: <1.5 ns output-to-output skew maintains phase coherence in multi-channel timing-critical stimulus generation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APWR	3.3 V only input tolerance (max Vin = V_CC + 0.5 V); faster t_PD = 3.7 ns (typ).	Not suitable for direct 5 V input interfacing; requires external clamping or level shifters.	Select when system operates strictly at 3.3 V and speed is prioritized over voltage flexibility.
74LVX125M	Same die and specs but offered in legacy SOIC-14 only (no TSSOP option); identical marking except suffix.	No functional difference; differs only in packaging availability and RoHS status (M may be non-Pb-free).	Select when TSSOP footprint is not needed and legacy inventory compatibility is required.

Compared with SN74LVC125APWR and 74LVX125M, the MC74LVX125MELG uniquely delivers 5 V input tolerance in a Pb-free TSSOP/SOIC package with industrial temperature range-making it optimal for mixed-voltage upgrades where reliability and regulatory compliance are mandatory.

Availability

MC74LVX125MELG is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74LVX125MELG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74LVX125MELG belongs to the LVX family of low-voltage, high-speed CMOS logic devices engineered for mixed-voltage system interoperability and industrial-grade reliability in space-constrained designs.

FAQ

What is the maximum input voltage rating for MC74LVX125MELG?

The MC74LVX125MELG supports DC input voltages up to 6.5 V, independent of V_CC. This 5 V-tolerant capability allows direct interfacing with legacy 5 V logic families while operating from a 3.3 V supply. Exceeding 6.5 V risks permanent damage, and inputs must never be left floating due to internal protection diode behavior. The MC74LVX125MELG datasheet specifies this limit under Maximum Ratings.

Does MC74LVX125MELG support 2.5 V operation?

Yes, MC74LVX125MELG is fully specified for V_CC = 2.0 V to 3.6 V, including 2.5 V nominal operation. At 2.5 V, propagation delay increases to ~6.2 ns (typ), and output drive reduces to ±16 mA, but all logic thresholds and 5 V input tolerance remain valid. The MC74LVX125MELG maintains guaranteed functionality across this full range per Recommended Operating Conditions.

What is the function of the OE pins on MC74LVX125MELG?

Each OE pin (OE0–OE3, Pins 1/4/10/13) controls one buffer channel independently. When OE_n = HIGH, the corresponding output (O_n) follows the input (D_n); when OE_n = LOW, O_n enters high-impedance state. This per-channel 3-state control enables flexible bus arbitration and avoids contention in shared-data-path designs using MC74LVX125MELG.

Is MC74LVX125MELG pin-compatible with standard 74-series logic?

Yes, MC74LVX125MELG is pin- and function-compatible with industry-standard 74HC125, 74HCT125, and 74LV125 devices in SOIC-14 and TSSOP-14 packages. Pin assignments match exactly: Dn, Oen, On, V_CC, GND positions are identical. However, MC74LVX125MELG offers superior 5 V input tolerance and lower ICC versus those families.

What package options are available for MC74LVX125MELG?

MC74LVX125MELG is offered in two Pb-free, RoHS-compliant packages: SOIC-14 NB (Case 751A, 8.75 mm × 3.9 mm) and TSSOP-14 (Case 948G, 5.1 mm × 4.5 mm). Both share identical pinout and electrical specifications. The "MELG" suffix specifically denotes the TSSOP-14 variant with green molding compound and Pb-free finish per onsemi's ordering nomenclature.

MC74LVX125MELG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVX

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 4mA, 4mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-14

MC74LVX125MELG FAQ

1.How can I place an order for MC74LVX125MELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74LVX125MELG 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 MC74LVX125MELG reliable?

The price and inventory of MC74LVX125MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX125MELG is usually 5 days.

3.What payment methods are accepted for MC74LVX125MELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX125MELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74LVX125MELG?

MC74LVX125MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74LVX125MELG 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 MC74LVX125MELG?

For technical support, including MC74LVX125MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX125MELG requirements.

6.How does Aetrix verify that MC74LVX125MELG is sourced from the original manufacturer or authorized distributors?

All MC74LVX125MELG 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 MC74LVX125MELG meets industry standards.

7.What is the process for return or replacement of MC74LVX125MELG?

All MC74LVX125MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX125MELG, 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 MC74LVX125MELG part is unused and in its original packaging.

Return procedure for MC74LVX125MELG:

1.Submit a request within 90 days.

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

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