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onsemi MC74LVX126MELG
- Part No.:
- MC74LVX126MELG
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74LVX126MELG.pdf
- Description:
- IC BUF NON-INVERT 3.6V SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
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Product details
Overview
MC74LVX126MELG 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 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 bidirectional data bus isolation in industrial microcontroller interfaces.
For engineers reviewing the MC74LVX126MELG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, SOEIAJ-14 package details, 3-state timing behavior, input voltage tolerance up to 7.0 V, and direct alternatives for bus buffering in mixed-voltage embedded designs.
Technical Context
The MC74LVX126MELG implements four independent non-inverting buffers, each controlled by a dedicated active-low 3-state enable (OE) input. Its CMOS design ensures balanced tPLH/tPHL propagation delays and low dynamic noise (VOLP ≤ 0.5 V).
Input structures tolerate DC voltages up to 7.0 V regardless of VCC, enabling safe interfacing of 5 V signals into 3.3 V logic domains without external clamping. The device enters high-impedance state only when OE is driven low - no internal pull-ups or latching behavior is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - supports standard 3.3 V operation with margin for rail variation |
| Input Voltage Tolerance | −0.5 V to +7.0 V - enables direct connection to 5 V buses without level shifters |
| tPD (Typ) | 4.4 ns at VCC = 3.3 V, CL = 15 pF - ensures sub-5 ns timing for high-speed data transfer |
| IOUT (Drive) | ±25 mA per output - sufficient to drive 50 Ω transmission lines or multiple CMOS loads |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| ICC (Max) | 4 µA at TA = 25°C - ultra-low quiescent current for battery-backed or always-on subsystems |
| ESD Rating | HBM > 2000 V - robust handling during PCB assembly and field service |
Pinout & Package
MC74LVX126MELG is packaged in a 14-pin SOEIAJ (small-outline JEDEC) surface-mount package (Case 965), 5.1 mm × 8.2 mm footprint, 1.27 mm pitch, lead-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE0–OE3 | Active-low 3-state enable inputs - each controls one buffer independently |
| 2, 5, 9, 12 | D0–D3 | Data inputs - accept 5 V-tolerant signals up to 7.0 V |
| 3, 6, 8, 11 | O0–O3 | Non-inverting buffered outputs - drive CMOS/TTL loads with ±25 mA capability |
| 7 | GND | Ground reference - must be connected to system common ground plane |
| 14 | VCC | Positive supply - supplies internal logic; powers output drivers; range 2.0–3.6 V |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Supports direct interface to legacy 5 V logic without external resistors or translators |
| Low-noise switching | VOLP ≤ 0.5 V ensures minimal ground bounce in dense digital layouts |
| Power-down input protection | Inputs remain safe even when VCC = 0 V - prevents back-powering or latch-up |
| Pb-free packaging | SOEIAJ-14 (M suffix) meets RoHS Directive 2011/65/EU and JESD97 standards |
| High-impedance isolation | Outputs fully disconnect (IOZ ≤ ±5.0 µA) when OE = high - eliminates bus contention |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Isolating sensor data buses between 3.3 V MCU and 5 V analog front-end ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled signal pass-through with precise 3-state timing (tPZH ≤ 13.0 ns @ 3.3 V). Use Value: Eliminates need for discrete level-shifters while maintaining <5 ns propagation delay and full 125°C operation. |
Use Scenario: Enabling/disabling CAN transceiver control lines and LIN bus peripherals in body electronics gateways. IC Role / Device Role / Timing Role: Acts as voltage-compatible bus switch for MCU GPIO expansion, with OE pins synchronized to firmware-controlled power sequencing. Use Value: Prevents bus conflicts during sleep/wake transitions and withstands automotive load-dump transients via 7.0 V input rating. |
| Medical Diagnostic Instrumentation | Test & Measurement Equipment |
Use Scenario: Routing calibration signals between FPGA-based timing engines and 5 V DAC/ADC subsystems in portable ultrasound platforms. IC Role / Device Role / Timing Role: Provides glitch-free signal gating with matched tPLH/tPHL (≤1.5 ns skew) across all four channels. Use Value: Ensures deterministic timing alignment critical for multi-channel synchronous sampling and reduces jitter-induced SNR degradation. |
Use Scenario: Managing shared GPIB or RS-232 control lines among multiple 3.3 V microcontrollers in automated test fixtures. IC Role / Device Role / Timing Role: Functions as reconfigurable bus isolator with independent OE control per channel for flexible resource allocation. Use Value: Enables hot-swap-safe peripheral arbitration and simplifies firmware-driven port multiplexing without hardware redesign. |
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 |
|---|---|---|---|
| SN74LVC126APWR | Wider VCC range (1.65–5.5 V); lower tPD (3.5 ns typ); no 7 V input tolerance | Requires external clamping for 5 V inputs; better suited for pure 3.3 V or dual-supply systems | Select when operating exclusively at 3.3 V and maximum speed is prioritized over 5 V signal compatibility |
| 74LVX126M | Same die and specs; differs only in packaging - SOEIAJ-14 without 'G' (lead-free) suffix | Identical functional behavior; 'G' denotes Pb-free compliance per JESD97 | Choose MC74LVX126MELG for RoHS-compliant production; use 74LVX126M only if legacy Pb-containing assembly is required |
Compared with SN74LVC126APWR and 74LVX126M, the MC74LVX126MELG uniquely combines 7.0 V input tolerance with industrial temperature range and Pb-free packaging - making it the only option for robust 3.3 V/5 V bridging in safety-critical or environmentally regulated deployments.
Availability
MC74LVX126MELG is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74LVX126MELG 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 focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.
The MC74LVX126MELG belongs to the LVX low-voltage logic family, engineered specifically for mixed-voltage system interfacing where reliability, noise immunity, and wide input voltage tolerance are essential in harsh operating environments.
FAQ
What is the maximum input voltage the MC74LVX126MELG can safely accept?
The MC74LVX126MELG supports DC input voltages from −0.5 V to +7.0 V, independent of VCC. This allows direct connection of 5 V signals into a 3.3 V system without external protection components. The specification is validated per Absolute Maximum Ratings and confirmed in both Recommended Operating Conditions and DC Electrical Characteristics tables of the official datasheet.
Does the MC74LVX126MELG have built-in power-down protection?
Yes, the MC74LVX126MELG includes power-down input protection: inputs remain electrically safe and non-latching even when VCC = 0 V. This prevents back-driving or unintended current paths during power sequencing, a key requirement in systems with staggered supply ramp-up/down. The feature is explicitly listed under "Features" and verified in the Maximum Ratings table (IIK = −20 mA).
What is the output drive capability of the MC74LVX126MELG?
The MC74LVX126MELG delivers ±25 mA DC output current per pin (IOUT), as specified in the Maximum Ratings table. At VCC = 3.3 V and TA = 25°C, VOH ≥ 2.58 V at IOH = −4 mA and VOL ≤ 0.36 V at IOL = 4 mA - confirming robust drive strength for driving multiple CMOS loads or terminated transmission lines.
Is the MC74LVX126MELG pin-compatible with standard 74-series logic devices?
Yes, the MC74LVX126MELG is pin- and function-compatible with industry-standard 74AC126, 74HC126, and 74AHC126 devices in the same 14-pin SOEIAJ package. Pin assignments (Dn, Oen, On, VCC, GND) match exactly, enabling drop-in replacement where 5 V-tolerant inputs and low-voltage operation are needed.
What package type does MC74LVX126MELG use, and what are its key mechanical dimensions?
The MC74LVX126MELG uses the SOEIAJ-14 package (Case 965), a 14-pin small-outline JEDEC package with 1.27 mm pitch. Key dimensions: 5.10–5.45 mm width, 9.90–10.50 mm length, and 1.7 mm max height. The 'G' suffix confirms Pb-free construction per JESD97, and the marking "LVX126" appears adjacent to pin 1.
MC74LVX126MELG 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74LVX126MELG FAQ
1.How can I place an order for MC74LVX126MELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LVX126MELG 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 MC74LVX126MELG reliable?
The price and inventory of MC74LVX126MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX126MELG is usually 5 days.
3.What payment methods are accepted for MC74LVX126MELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX126MELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LVX126MELG?
MC74LVX126MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LVX126MELG 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 MC74LVX126MELG?
For technical support, including MC74LVX126MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX126MELG requirements.
6.How does Aetrix verify that MC74LVX126MELG is sourced from the original manufacturer or authorized distributors?
All MC74LVX126MELG 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 MC74LVX126MELG meets industry standards.
7.What is the process for return or replacement of MC74LVX126MELG?
All MC74LVX126MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX126MELG, 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 MC74LVX126MELG part is unused and in its original packaging.
Return procedure for MC74LVX126MELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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