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onsemi MC74LVX126MG
- Part No.:
- MC74LVX126MG
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74LVX126MG.pdf
- Description:
- IC BUF NON-INVERT 3.6V SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,904
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Product details
Overview
MC74LVX126MG from ON Semiconductor is a quad 3-state bus buffer with 5 V-tolerant inputs, designed for level-shifting between 3.3 V and 5.0 V systems. It features 4.4 ns typical propagation delay at VCC = 3.3 V, ±25 mA output drive, and operates across −40°C to +125°C. Used in mixed-voltage data buses and microcontroller I/O expansion.
For engineers reviewing the MC74LVX126MG datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V input tolerance, 3-state enable timing (tPZL/tPHZ ≤ 13.0 ns), low ICC (4 µA max), noise immunity (VOLP ≤ 0.5 V), and SOIC-14 package compatibility with legacy 74-series logic footprints.
Technical Context
The MC74LVX126MG implements four independent non-inverting buffers, each with dedicated active-low 3-state enable (OE) control. Inputs tolerate up to 7.0 V DC, enabling direct interfacing of 5 V signals into 3.3 V logic domains without external level shifters.
Its CMOS architecture delivers balanced tPLH/tPHL propagation delays (≤14.0 ns at VCC = 3.3 V, CL = 50 pF), low dynamic noise (VOLP ≤ 0.5 V), and guaranteed latchup immunity (>300 mA). The device supports hot insertion via power-down protection on all inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - Enables operation in 2.5 V/3.3 V systems; not rated for 5 V supply. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - Allows safe connection of 5 V signals to 3.3 V-powered ICs without clamping diodes or resistors. |
| tPD (Typ) | 4.4 ns at VCC = 3.3 V, CL = 15 pF - Supports >100 MHz bus toggling in short-trace applications. |
| IOUT (Drive) | ±25 mA per output - Sufficient to drive standard TTL loads or multiple CMOS inputs (fan-out ≥ 20). |
| ICC (Max) | 4 µA at TA = 25°C - Enables ultra-low static power in battery-backed or always-on interface circuits. |
| tPZL / tPHZ (Max) | 13.0 ns at VCC = 3.3 V, CL = 50 pF - Ensures deterministic bus release timing for arbitration or shared resource access. |
| Operating Temp | −40°C to +125°C - Qualified for under-hood automotive, industrial PLC, and extended-temperature embedded control. |
Pinout & Package
MC74LVX126MG is housed in a 14-pin SOIC package (SOEIAJ-14, M suffix, Case 965), with 1.27 mm pitch, 8.75 mm × 3.95 mm body, and gull-wing leads. Pin 1 is marked by notch or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (OE0–OE3) | Active-Low Output Enable | Drives corresponding output high-impedance when HIGH; enables buffer pass-through when LOW. |
| 2, 5, 9, 12 (D0–D3) | Data Input | Accepts 5 V-tolerant logic signals; internally clamped to VCC + 0.5 V max. |
| 3, 6, 8, 11 (O0–O3) | 3-State Output | Non-inverting buffered output; enters high-Z state within 13 ns of OE transition. |
| 7 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-inductance connection. |
| 14 (VCC) | Power Supply | 3.3 V nominal supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-Tolerant Inputs | Supports direct connection of 5 V microcontroller GPIO or legacy peripherals to 3.3 V bus without external components. |
| Low Propagation Skew | tOSHL/tOSLH ≤ 1.5 ns ensures synchronized output transitions across all four channels - critical for parallel data integrity. |
| Hot-Insertion Safe | Power-down protection prevents back-driving or latchup during live board insertion into powered backplanes. |
| ESD Robustness | Human Body Model >2000 V and Machine Model >200 V - reduces handling damage risk in manufacturing and field repair. |
| Pb-Free Compliant | Meets RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260°C). |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Interfacing 5 V sensor modules (e.g., analog-to-digital converter supervisors) to a 3.3 V ARM Cortex-M4-based main controller over a shared 16-bit data bus. IC Role / Device Role / Timing Role: Quad buffer isolates voltage domains while enabling bidirectional data flow control via independent OE lines synchronized to bus arbitration logic. Use Value: Eliminates need for discrete level translators, reducing BOM count and PCB area; 4.4 ns tPD ensures no timing penalty in 25 MHz bus cycles. |
Use Scenario: Driving multiple 5 V CAN transceiver enable pins and LIN bus pull-ups from a single 3.3 V microcontroller I/O port bank. IC Role / Device Role / Timing Role: Provides current gain and voltage-level translation for mixed-supply peripheral control, with OE pins tied to MCU GPIO for software-selectable activation. Use Value: ±25 mA drive capability meets ISO 11898-2 requirements for transceiver enable sourcing; −40°C to +125°C rating matches under-dash environmental stress. |
| Medical Diagnostic Equipment Data Acquisition | Test & Measurement Instrumentation Bus Expansion |
|
Use Scenario: Isolating high-precision 5 V ADC front-end signals from a 3.3 V FPGA-based digital processing subsystem in portable ultrasound units. IC Role / Device Role / Timing Role: Acts as a noise-isolated, low-skew signal conditioner between analog domain and digital domain, with OE controlled by FPGA handshake signals. Use Value: VOLP ≤ 0.5 V and balanced delays preserve signal integrity for 12-bit+ data paths; low ICC minimizes thermal drift in sealed enclosures. |
Use Scenario: Expanding GPIB or LXI-compatible instrument control bus from a 3.3 V SoC to support legacy 5 V test fixtures and calibration modules. IC Role / Device Role / Timing Role: Functions as a programmable bus repeater, with individual OE control allowing dynamic partitioning of bus segments during self-test sequences. Use Value: Pin- and function-compatibility with 74HC126 simplifies migration from older designs; tPZH/tPLZ specs guarantee deterministic bus release for IEEE 488.2 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 |
|---|---|---|---|
| SN74LVC126APWR | Wider VCC range (1.65–3.6 V); lower tPD (3.5 ns typ); no 5 V input tolerance - requires external clamping for 5 V signals. | Best suited for pure 3.3 V or dual-supply 1.8 V/3.3 V systems where input voltage never exceeds VCC + 0.3 V. | Select when operating exclusively below 3.3 V and maximum speed is prioritized over 5 V signal compatibility. |
| 74LVX126M | Identical electrical specs and pinout; differs only in marking and packaging - same die, same SOEIAJ-14 footprint, same M suffix. | No functional difference; used interchangeably in production where part number branding or tape/reel configuration varies by distributor. | Valid drop-in replacement with identical performance, qualification, and thermal behavior - no design change required. |
Compared with SN74LVC126APWR, MC74LVX126MG trades 0.9 ns speed for robust 5 V input tolerance - essential for legacy system integration. Compared with 74LVX126M, it is functionally identical but may differ in traceability or lot-specific screening; both satisfy identical AEC-Q100 Grade 1 requirements.
Availability
MC74LVX126MG is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive body control modules, medical diagnostic data acquisition, and test instrumentation bus expansion requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MC74LVX126MG 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC74LVX126MG belongs to the LVX low-voltage logic family, engineered for mixed-signal system interfacing where 3.3 V core logic must reliably communicate with legacy 5 V peripherals without external translation circuitry.
FAQ
What is the maximum input voltage the MC74LVX126MG can safely accept?
The MC74LVX126MG supports DC input voltages from −0.5 V to +7.0 V, regardless of VCC level. This 5 V-tolerant feature allows direct connection of 5 V signals to its inputs while powered from 3.3 V, eliminating external level-shifting components. Exceeding +7.0 V risks permanent damage per the Absolute Maximum Ratings table.
Can the MC74LVX126MG be used with a 5 V supply voltage?
No - the MC74LVX126MG is not rated for 5 V VCC operation. Its recommended VCC range is 2.0 V to 3.6 V. Applying 5 V to VCC violates Absolute Maximum Ratings and will cause excessive ICC, thermal runaway, or immediate failure. The 5 V tolerance applies only to input pins, not the supply rail.
How does the MC74LVX126MG handle unused inputs?
Unused inputs on the MC74LVX126MG must never be left floating. Per the datasheet, all inputs (including OE and D pins) should be tied to VCC or GND using pull-up/pull-down resistors (typically 10 kΩ). Floating inputs increase ICC, induce oscillation, and raise EMI - especially critical in high-density layouts or noisy industrial environments.
Is the MC74LVX126MG pin-compatible with standard 74-series logic devices?
Yes - the MC74LVX126MG is pin- and function-compatible with industry-standard 74HC126, 74HCT126, and 74LV126 devices in the same SOIC-14 package. Pin assignments (e.g., D0/O0/OE0 on pins 2/3/1) match exactly, enabling drop-in replacement in existing designs without PCB modification.
What is the thermal performance of the MC74LVX126MG in continuous operation?
The MC74LVX126MG has a maximum junction temperature of +150°C and operates reliably from −40°C to +125°C ambient. At full 3.3 V supply and 25°C ambient, its typical power dissipation is <1 mW in quiescent state (ICC = 4 µA) and <15 mW under full 25 mA load per output - enabling use in thermally constrained enclosures without forced cooling.
MC74LVX126MG 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74LVX126MG FAQ
1.How can I place an order for MC74LVX126MG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LVX126MG 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 MC74LVX126MG reliable?
The price and inventory of MC74LVX126MG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX126MG is usually 5 days.
3.What payment methods are accepted for MC74LVX126MG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX126MG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LVX126MG?
MC74LVX126MG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LVX126MG 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 MC74LVX126MG?
For technical support, including MC74LVX126MG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX126MG requirements.
6.How does Aetrix verify that MC74LVX126MG is sourced from the original manufacturer or authorized distributors?
All MC74LVX126MG 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 MC74LVX126MG meets industry standards.
7.What is the process for return or replacement of MC74LVX126MG?
All MC74LVX126MG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX126MG, 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 MC74LVX126MG part is unused and in its original packaging.
Return procedure for MC74LVX126MG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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