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

onsemi MC74LVX125M

Name: MC74LVX125M
Brand: onsemi
SKU: MC74LVX125M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74LVX125M

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: MC74LVX125M.pdf

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

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Product details

Overview

MC74LVX125M from onsemi is a quad 3-state bus buffer with 5 V-tolerant inputs, designed for level-shifting between 3.0 V and 5.0 V logic domains in digital interface circuits. It features 4.4 ns typical propagation delay at 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 expansion and FPGA I/O bridging.

For engineers reviewing the MC74LVX125M datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V input tolerance, 3-state timing (tPZL/tPLZ), supply voltage range (2.0–3.6 V), and SOIC-14 NB/TSSOP-14 package compatibility with legacy 74-series logic footprints.

Technical Context

The MC74LVX125M implements four independent non-inverting buffers, each with a dedicated active-low 3-state enable (OE) input. All inputs tolerate up to 6.5 V DC, enabling safe interfacing of 5 V signals into 3.3 V systems without external level shifters.

Its CMOS design delivers balanced tPLH/tPHL propagation delays (≤12.0 ns max at 3.3 V/50 pF), low dynamic noise (VOLP ≤ 0.5 V), and guaranteed high-impedance isolation (IOZ ≤ ±2.5 µA) when OE is asserted. Power-down protection prevents latchup during unpowered operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (VCC)	2.0–3.6 V - Enables direct integration into 3.3 V systems without regulator overhead.
Input Voltage Tolerance	−0.5 to +6.5 V - Supports mixed-voltage I/O without external clamping or translation circuitry.
Propagation Delay (tPLH/tPHL)	4.4 ns typ @ 3.3 V/15 pF - Ensures sub-5 ns timing margin for high-speed 32-bit bus applications.
Output Drive Strength	±25 mA per pin - Sufficient to drive 50 pF loads across full temperature range with rail-to-rail swing.
3-State Leakage (IOZ)	±2.5 µA max @ 3.6 V - Guarantees minimal bus contention during disable, critical for shared-bus reliability.
Operating Temperature	−40°C to +85°C - Qualified for industrial-grade embedded control and communications equipment.
ESD Rating (HBM)	>2000 V - Provides robust handling integrity during PCB assembly and field service.

Pinout & Package

MC74LVX125M is available in SOIC-14 NB (Case 751A) and TSSOP-14 (Case 948G) packages - both 14-pin surface-mount outlines with 1.27 mm pitch. Pin 1 is marked by notch or beveled corner; pin 7 = GND, pin 14 = VCC.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13 (OE0–OE3)	Active-Low Output Enable	Drives corresponding output (O0–O3) to high-impedance when HIGH; enables buffer when LOW.
2, 5, 9, 12 (D0–D3)	Data Input	Accepts 5 V-tolerant logic signals; no external pull-up required for 3.3 V system compatibility.
3, 6, 8, 11 (O0–O3)	3-State Output	Non-inverting buffered output; enters high-Z state within 11.0 ns max after OE assertion.
7	GND	Ground reference for all logic and power domains; must be low-inductance connection.
14	VCC	Primary 3.3 V supply; decoupling capacitor (0.1 µF) required within 5 mm of this pin.

Key Features

Feature	Design Value
5 V-Tolerant Inputs	Supports direct connection to 5 V microcontrollers, FPGAs, or legacy peripherals without level-shifter ICs.
Low Propagation Skew	tOSHL/tOSLH ≤ 1.5 ns ensures synchronized switching across all four outputs-critical for parallel bus integrity.
Power-Down Input Protection	Prevents back-driving and latchup when VCC = 0 V but inputs remain active-enables hot-swap capability.
Pb-Free & RoHS Compliant	Meets global environmental compliance requirements; compatible with lead-free reflow profiles (J-STD-020).
Latchup Immunity	Exceeds 300 mA per JEDEC JESD78 - eliminates risk of destructive latchup under transient overvoltage.

Applications

Microcontroller Bus Expansion	FPGA I/O Bridging
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU by connecting parallel peripherals (ADCs, DACs, displays) via shared 8-bit data bus. IC Role / Device Role / Timing Role: Quad buffer isolates MCU data lines from peripheral loading; OE pins synchronized to address decode logic for cycle-accurate bus arbitration. Use Value: Eliminates need for discrete MOSFET switches or dedicated level translators-reduces BOM count and layout area by 30%.	Use Scenario: Interfacing a Xilinx Artix-7 FPGA operating at 3.3 V with industrial sensors delivering 5 V TTL outputs. IC Role / Device Role / Timing Role: Acts as unidirectional input translator; Dn pins accept 5 V sensor signals while O0–O3 drive FPGA inputs at 3.3 V logic levels. Use Value: Achieves <12 ns total path delay (input to FPGA register), preserving setup/hold timing margins for 50 MHz sampling clocks.
Industrial PLC Backplane Interface	Legacy Peripheral Adapter Board
Use Scenario: Isolating modular I/O cards on a 24 V-powered PLC backplane from a 3.3 V controller module using shared address/data bus. IC Role / Device Role / Timing Role: Provides galvanically isolated signal buffering via 3-state control; OE lines tied to card-select decoding for slot-specific bus access. Use Value: Enables hot-plug insertion of I/O modules without bus contention-verified across −40°C to +85°C ambient range.	Use Scenario: Adapting vintage ISA-bus peripherals (e.g., parallel port printers) to modern embedded hosts via USB-to-parallel bridge with 3.3 V logic core. IC Role / Device Role / Timing Role: Buffers bidirectional data lines between 5 V ISA bus and 3.3 V bridge ASIC; OE controlled by direction bit from host firmware. Use Value: Maintains signal integrity over 15 cm trace lengths with <0.5 V dynamic noise-meets IEEE 1284 Class A timing compliance.

Microcontroller Bus Expansion

FPGA I/O Bridging

Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU by connecting parallel peripherals (ADCs, DACs, displays) via shared 8-bit data bus.

IC Role / Device Role / Timing Role: Quad buffer isolates MCU data lines from peripheral loading; OE pins synchronized to address decode logic for cycle-accurate bus arbitration.

Use Value: Eliminates need for discrete MOSFET switches or dedicated level translators-reduces BOM count and layout area by 30%.

Use Scenario: Interfacing a Xilinx Artix-7 FPGA operating at 3.3 V with industrial sensors delivering 5 V TTL outputs.

IC Role / Device Role / Timing Role: Acts as unidirectional input translator; Dn pins accept 5 V sensor signals while O0–O3 drive FPGA inputs at 3.3 V logic levels.

Use Value: Achieves <12 ns total path delay (input to FPGA register), preserving setup/hold timing margins for 50 MHz sampling clocks.

Industrial PLC Backplane Interface

Legacy Peripheral Adapter Board

Use Scenario: Isolating modular I/O cards on a 24 V-powered PLC backplane from a 3.3 V controller module using shared address/data bus.

IC Role / Device Role / Timing Role: Provides galvanically isolated signal buffering via 3-state control; OE lines tied to card-select decoding for slot-specific bus access.

Use Value: Enables hot-plug insertion of I/O modules without bus contention-verified across −40°C to +85°C ambient range.

Use Scenario: Adapting vintage ISA-bus peripherals (e.g., parallel port printers) to modern embedded hosts via USB-to-parallel bridge with 3.3 V logic core.

IC Role / Device Role / Timing Role: Buffers bidirectional data lines between 5 V ISA bus and 3.3 V bridge ASIC; OE controlled by direction bit from host firmware.

Use Value: Maintains signal integrity over 15 cm trace lengths with <0.5 V dynamic noise-meets IEEE 1284 Class A timing compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APWR	Wider VCC range (1.65–3.6 V); lower ICC (1 µA typ); same 5 V-tolerant inputs.	Better suited for ultra-low-power battery-backed systems; slightly slower tPLH (5.2 ns typ @ 3.3 V).	Select SN74LVC125APWR when standby current <1 µA is mandatory and 0.8 ns timing penalty is acceptable.
74AHC125PW,118	Higher VCC range (2.0–5.5 V); faster tPLH (3.7 ns typ @ 5 V); not 5 V-tolerant at 3.3 V VCC.	Requires VCC = 5 V to achieve rated speed; incompatible with 3.3 V-only supply rails.	Choose 74AHC125PW,118 only if system uses 5 V logic throughout and needs sub-4 ns delay.

Compared with SN74LVC125APWR and 74AHC125PW,118, the MC74LVX125M uniquely balances 5 V input tolerance with 3.3 V operation and industrial temperature support-making it optimal for mixed-voltage industrial controllers where supply rail flexibility and ruggedness are prioritized over minimum quiescent current or absolute maximum speed.

Availability

MC74LVX125M is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O bridging, microcontroller bus expansion, and legacy peripheral adapter boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74LVX125M 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 power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74LVX125M belongs to onsemi's LVX advanced CMOS logic family-designed specifically for low-voltage, high-speed, mixed-signal interface applications where 5 V tolerance, industrial temperature operation, and pin compatibility with legacy 74-series logic are essential.

FAQ

What is the maximum input voltage the MC74LVX125M can safely accept?

The MC74LVX125M supports DC input voltages from −0.5 V to +6.5 V, regardless of VCC level. This 5 V-tolerant capability allows direct connection of 5 V signals-even when powered from 3.3 V-without external clamping diodes or level shifters. The specification is validated across the full −40°C to +85°C operating range and is not dependent on VCC being present.

Does the MC74LVX125M require pull-up or pull-down resistors on its inputs?

No, the MC74LVX125M does not require external pull-up or pull-down resistors on its inputs. Its CMOS inputs have negligible leakage (±0.1 µA typ), and the datasheet explicitly warns against floating inputs due to increased ICC and potential oscillation. For unused inputs, tie them directly to VCC or GND-not through resistors-to ensure deterministic logic states and minimize power consumption.

Can the MC74LVX125M be used in a 2.5 V system?

Yes, the MC74LVX125M is fully specified down to VCC = 2.0 V, making it compatible with 2.5 V operation. At 2.5 V, VOH remains ≥2.0 V (min) and VOL ≤0.36 V (max) under 4 mA load, ensuring adequate noise margins. Propagation delay increases to 10.1 ns (max) at 2.7 V/50 pF, but timing remains functional for most medium-speed bus applications.

What is the recommended decoupling for the MC74LVX125M?

A 0.1 µF ceramic capacitor placed within 5 mm of the VCC pin (pin 14) and GND (pin 7) is mandatory for stable operation. For systems with multiple MC74LVX125M devices or high-frequency switching, add a 4.7 µF bulk capacitor per 5–10 ICs on the same VCC rail. Avoid shared vias between decoupling caps and GND pins to prevent ground bounce-induced VOLP spikes.

Is the MC74LVX125M pin-compatible with standard 74LS125 or 74HC125 devices?

Yes, the MC74LVX125M shares identical pinout and logic function with 74LS125 and 74HC125-pin 1 = OE0, pin 2 = D0, pin 3 = O0, etc.-and is functionally compatible with both families. However, unlike LS/HC versions, the MC74LVX125M offers 5 V-tolerant inputs and operates natively at 3.3 V, enabling drop-in replacement in upgraded designs without changing PCB layout.

MC74LVX125M Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVX

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

Packaging:: Tube

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

MC74LVX125M FAQ

1.How can I place an order for MC74LVX125M through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74LVX125M 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 MC74LVX125M reliable?

The price and inventory of MC74LVX125M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX125M is usually 5 days.

3.What payment methods are accepted for MC74LVX125M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX125M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74LVX125M?

MC74LVX125M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74LVX125M 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 MC74LVX125M?

For technical support, including MC74LVX125M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX125M requirements.

6.How does Aetrix verify that MC74LVX125M is sourced from the original manufacturer or authorized distributors?

All MC74LVX125M 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 MC74LVX125M meets industry standards.

7.What is the process for return or replacement of MC74LVX125M?

All MC74LVX125M units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX125M, 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 MC74LVX125M part is unused and in its original packaging.

Return procedure for MC74LVX125M:

1.Submit a request within 90 days.

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

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