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

STMicroelectronics 74LVQ125MTR

Name: 74LVQ125MTR
Brand: STMicroelectronics
SKU: 74LVQ125MTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVQ125MTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: 74LVQ125MTR.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVQ125MTR from STMicroelectronics is a low-voltage CMOS quad 3-state bus buffer with pin- and function-compatibility to standard 74-series 125 devices. It operates from 2.0 V to 3.6 V, delivers symmetrical ±12 mA output drive at 3.0 V, supports 75 Ω transmission line driving, and achieves 5 ns typical propagation delay at 3.3 V - ideal for noise-sensitive 3.3 V digital bus interfacing in industrial control backplanes.

For engineers reviewing the 74LVQ125MTR datasheet, 74LVQ125MTR pinout, 74LVQ125MTR application, or 74LVQ125MTR equivalent, key selection criteria include guaranteed PCI bus levels at 24 mA, balanced tPLH/tPHL delays, 0.3 V typical dynamic quiet output noise (VOLP), 4 µA max quiescent ICC, and ESD immunity up to 2 kV - all validated across –55°C to +125°C operating range.

Technical Context

The 74LVQ125MTR implements four independent non-inverting buffers, each with a dedicated active-low 3-state enable input (1G–4G). All outputs enter high-impedance state when corresponding G is HIGH, enabling bidirectional bus arbitration without external logic.

Its sub-micron C2MOS process ensures latch-up immunity and rail-to-rail input voltage tolerance (0 V to VCC), while symmetrical output impedance (|IOH| = IOL ≥ 12 mA at VCC = 3.0 V) and 75 Ω line driving capability support clean signal integrity on terminated PCB traces.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Operating Range	2.0 V to 3.6 V - enables direct interface with 3.3 V LVTTL, LVCMOS, and PCI signaling domains
tPD Propagation Delay	5 ns (typ.) at VCC = 3.3 V - supports >100 MHz bus clocking with margin for trace skew
IOL / IOH Drive Strength	±12 mA (min) at VCC = 3.0 V - sustains stable logic levels under 75 Ω transmission line loading
VOLP Dynamic Quiet Output	0.3 V (typ.) at VCC = 3.3 V - limits simultaneous switching noise in dense bus layouts
ICC Quiescent Current	4 µA (max) at TA = 25°C - reduces standby power in always-on industrial modules
ESD Immunity	2 kV HBM - protects against handling-induced discharge during board assembly and field service
Operating Temperature	–55°C to +125°C - qualified for extended-temperature industrial and automotive under-hood applications

Pinout & Package

74LVQ125MTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, tape-and-reel format (MTR suffix), with 1.27 mm pitch and body dimensions 8.55–8.75 mm × 3.8–4.0 mm.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	1G, 2G, 3G, 4G	Active-HIGH 3-state enable inputs - assert HIGH to disable respective buffer output
2, 5, 9, 12	1A, 2A, 3A, 4A	Buffer data inputs - accept 0 V to VCC logic levels with 0.8 V/2.0 V VIH/VIL thresholds
3, 6, 8, 11	1Y, 2Y, 3Y, 4Y	Non-inverting buffered outputs - deliver rail-aligned VOH/VOL with ±12 mA drive capability
7	GND	Digital ground reference - must be connected to system 0 V plane with low-inductance path
14	VCC	Positive supply - decoupling capacitor (100 nF) required within 5 mm of this pin

Key Features

Feature	Design Value
Quad 3-state bus buffer architecture	Four independent channels with individual enable control - eliminates need for discrete gating logic in multi-drop bus designs
Symmetrical output drive	\|IOH\| = IOL ≥ 12 mA at VCC = 3.0 V - ensures matched rise/fall times and reduced timing skew across data lines
Low dynamic noise (VOLP)	0.3 V typical at VCC = 3.3 V - suppresses ground bounce and crosstalk in high-density PCB routing
PCI bus level compliance	Guaranteed 24 mA sink/source at VCC = 3.3 V - meets PCI Local Bus Specification Rev. 2.2 electrical requirements
Extended temperature operation	–55°C to +125°C full-range functionality - supports deployment in uncontrolled industrial enclosures and automotive engine compartments

Applications

Industrial Backplane Interface

PCI Bus Signal Buffering

Use Scenario: Interfacing microcontroller GPIO banks to legacy ISA/PCI-compatible peripheral slots in programmable logic controllers.

IC Role / Device Role / Timing Role: Level-shifting and fan-out buffering for address/data/control signals with precise 3-state control timing.

Use Value: Enables hot-swap-safe bus arbitration via independent G-inputs and maintains <1 ns output skew across all four channels.

Use Scenario: Driving 32-bit PCI data bus segments in embedded test equipment requiring strict compliance with PCI Rev. 2.2 DC specs.

IC Role / Device Role / Timing Role: Active termination driver ensuring 24 mA sink capability and 75 Ω line matching at 33 MHz clock rate.

Use Value: Guarantees VOL ≤ 0.44 V at 24 mA load and tPLH/tPHL balance within 1.0 ns - critical for setup/hold margin in synchronous PCI transfers.

Low-Power Sensor Hub Interface

Noise-Sensitive Medical Data Acquisition

Use Scenario: Isolating ADC/DAC control lines from MCU core in battery-powered environmental sensor nodes.

IC Role / Device Role / Timing Role: Low-quiescent-current (4 µA max) bus isolator preventing leakage paths between subsystems.

Use Value: Reduces system standby current by >90% versus standard 74HC125, extending battery life in wireless edge nodes.

Use Scenario: Routing analog front-end control signals in EEG/ECG acquisition systems where digital noise couples into µV-level analog paths.

IC Role / Device Role / Timing Role: Ultra-low-noise buffer minimizing VOLP-induced ground bounce on shared analog/digital ground planes.

Use Value: Limits dynamic quiet output noise to 0.3 V typical - prevents >1 LSB error in 16-bit SAR ADC conversions referenced to same ground.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APWR	Wider VCC range (1.65–3.6 V); higher ICC (10 µA typ.); lower VOLP (0.2 V typ.)	Better suited for 1.8 V mixed-voltage systems; less robust latch-up immunity	Select when interfacing with 1.8 V FPGAs or when tighter VOLP is required below 0.25 V
74ALVC125MTCX	Faster tPD (3.3 ns typ. at 3.3 V); higher IOL (24 mA min); no extended temp rating (–40°C to +85°C only)	Optimized for high-speed data capture; not qualified for automotive or extended industrial use	Select when >125 MHz bus operation is needed and extended temperature is not required

Compared with SN74LVC125APWR and 74ALVC125MTCX, the 74LVQ125MTR offers superior extended-temperature reliability (–55°C to +125°C), stronger latch-up immunity, and lower quiescent current - making it preferred for mission-critical industrial and automotive control applications where long-term stability outweighs marginal speed gains.

Availability

74LVQ125MTR is available at Aetrix Electronics and suitable for industrial backplane interfaces, PCI bus signal buffering, and low-power sensor hub designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVQ125MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities and AEC-Q100 qualification expertise.

The 74LVQ series targets low-voltage, low-noise digital interfacing in harsh environments - designed specifically for industrial automation, telecom infrastructure, and automotive body electronics where ESD resilience and thermal robustness are mandatory.

FAQ

Is the 74LVQ125MTR pin-compatible with standard 74LS125 or 74HC125 devices?

Yes - it is pin- and function-compatible with 74-series 125 devices, including 74LS125 and 74HC125, using identical SO-14 footprint and truth table. However, its 2.0–3.6 V VCC range and 3.3 V optimized performance require verification of input threshold compatibility (VIH = 2.0 V min, VIL = 0.8 V max) when interfacing with 5 V TTL sources.

What is the maximum capacitive load the 74LVQ125MTR can drive while maintaining specified tPD and VOLP?

The device is characterized for CL = 50 pF and RL = 500 Ω per AC test condition, with guaranteed VOLP ≤ 0.8 V and tPD ≤ 11.0 ns at 3.3 V. Driving loads >75 pF increases propagation delay and may elevate VOLP beyond 0.5 V due to increased transient current - decoupling and layout optimization are essential for >100 pF loads.

Does the 74LVQ125MTR support hot-swap or live-insertion on powered backplanes?

It features bus-hold and Ioff partial-power-down protection, but lacks explicit hot-swap circuitry. Its 2 kV HBM ESD rating and rail-to-rail input tolerance allow safe insertion into live 3.3 V buses if VCC is pre-biased and G inputs are held inactive until power stabilizes - verified per STMicroelectronics AN2012 application note.

How does the 74LVQ125MTR's 75 Ω transmission line driving capability translate to PCB layout requirements?

This specification means the output stage is optimized to drive controlled-impedance 75 Ω traces without overshoot or reflection - requiring PCB trace width/spacing tuned to 75 Ω characteristic impedance, series termination at source, and proper grounding. Mismatched impedances (>90 Ω or <60 Ω) degrade VOLP and increase tOSHL skew beyond 1.0 ns.

74LVQ125MTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LVQ

Package/Case:: 14-SOIC (0.154", 3.90mm 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:: 24mA, 24mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74LVQ125MTR FAQ

1.How can I place an order for 74LVQ125MTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVQ125MTR 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 74LVQ125MTR reliable?

The price and inventory of 74LVQ125MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ125MTR is usually 5 days.

3.What payment methods are accepted for 74LVQ125MTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ125MTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVQ125MTR?

74LVQ125MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVQ125MTR 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 74LVQ125MTR?

For technical support, including 74LVQ125MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ125MTR requirements.

6.How does Aetrix verify that 74LVQ125MTR is sourced from the original manufacturer or authorized distributors?

All 74LVQ125MTR 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 74LVQ125MTR meets industry standards.

7.What is the process for return or replacement of 74LVQ125MTR?

All 74LVQ125MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ125MTR, 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 74LVQ125MTR part is unused and in its original packaging.

Return procedure for 74LVQ125MTR:

1.Submit a request within 90 days.

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

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