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onsemi MC74LVX240MG
- Part No.:
- MC74LVX240MG
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74LVX240MG.pdf
- Description:
- IC BUFFER INVERT 3.6V SOEIAJ-20
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
MC74LVX240MG from onsemi is an advanced high-speed CMOS octal bus buffer with dual active-low 3-state outputs and 5V-tolerant inputs (up to 7.0 V), designed for level-shifting between 3.0 V and 5.0 V systems in memory address/data bus interfaces. It delivers 4.3 ns typical propagation delay at 3.3 V, supports ±25 mA output drive per pin, operates from −40°C to +85°C, and features low-noise performance (VOLP ≤ 0.8 V).
For engineers reviewing the MC74LVX240MG datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated SOIC-20 pin mapping, confirmed 5V-tolerant input behavior, real-world timing parameters under 15 pF/50 pF loads, and two documented alternative parts for bus buffering in mixed-voltage embedded systems.
Technical Context
The MC74LVX240MG implements two independent 4-bit inverting 3-state buffers, each controlled by its own active-low output enable (1OE, 2OE). Its input structure incorporates protection diodes enabling 5V-tolerant operation up to 7.0 V while powered from 2.0–3.6 V supplies - critical for interfacing legacy 5V peripherals with modern 3.3V logic.
Propagation delays are balanced across all eight outputs (tPLH/tPHL ≤ 9.7 ns max at 3.3 V/50 pF), and output-to-output skew is guaranteed ≤1.5 ns. The device exhibits low dynamic noise (VOLP ≤ 0.8 V) and includes power-down input protection, ensuring stable high-impedance states during supply ramp-up/down sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - enables direct integration into 3.3 V systems without level shifters |
| Input Voltage Tolerance | Up to 7.0 V - allows safe connection to 5.0 V buses without external clamping |
| tPD (Typ) | 4.3 ns at VCC = 3.3 V, CL = 15 pF - supports >100 MHz bus toggle rates in short-trace designs |
| IOUT (per pin) | ±25 mA - drives standard TTL loads and multiple CMOS inputs without fanout limitation |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| VOL (Max) | 0.44 V at IOL = 4 mA, VCC = 3.0 V - ensures robust LOW-level noise margin in noisy environments |
| VIH/VIL | 2.4 V / 0.8 V at VCC = 3.6 V - compatible with both 3.3 V LVTTL and mixed-signal interface thresholds |
Pinout & Package
MC74LVX240MG is supplied in a Pb-free SOIC-20 wide-body package (Case 751D), measuring 12.8 mm × 7.5 mm × 2.35 mm, with 1.27 mm pitch and gull-wing leads suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | Output Enable (1OE, 2OE) | Active-low controls for respective 4-bit buffer sections; both must be LOW for output assertion |
| 2, 4, 6, 8, 17, 15, 13, 11 | Data Inputs (1D0–1D3, 2D0–2D3) | Inverting inputs driving corresponding outputs; tolerate up to 7.0 V regardless of VCC |
| 18, 16, 14, 12, 3, 5, 7, 9 | Outputs (1O0–1O3, 2O0–2O3) | Inverted, 3-state outputs; enter high-Z when OE is HIGH; rated for ±25 mA sink/source |
| 10 | GND | Ground reference for all logic and I/O; decoupling capacitor required within 10 mm |
| 20 | VCC | Primary supply (2.0–3.6 V); requires local 0.1 μF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Supports direct connection to 5.0 V buses while operating from 3.3 V supply - eliminates external level translators |
| Balanced propagation delays | ≤1.5 ns output skew ensures synchronous data valid windows across all eight outputs in high-speed bus applications |
| Low dynamic noise (VOLP) | 0.8 V max quiet-output noise reduces crosstalk risk in dense PCB layouts with shared ground planes |
| Power-down input protection | Inputs remain high-impedance and non-latching during VCC ramp-up/down - prevents backfeeding or latchup |
| Pb-free & RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709C - suitable for consumer, industrial, and medical end equipment |
Applications
| Memory Address Buffering | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Buffering 32-bit address lines between a 3.3 V microcontroller and legacy 5 V SRAM modules in programmable logic controllers. IC Role / Device Role / Timing Role: Inverting 3-state octal buffer providing voltage-level translation and bus contention isolation during DMA cycles. Use Value: Eliminates need for discrete level shifters; 4.3 ns tPD maintains setup/hold timing margins for 25 MHz address strobes. |
Use Scenario: Isolating field I/O signals (digital inputs/outputs) from a 3.3 V FPGA-based controller in harsh factory environments. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling hot-swap-safe signal routing between isolated I/O banks and main logic. Use Value: 7.0 V input tolerance withstands induced transients on long cable runs; ±25 mA drive supports LED indicators and relay drivers. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing 3.3 V CAN controller outputs to 5 V analog multiplexers and sensor signal chains in body electronics. IC Role / Device Role / Timing Role: Level-translating buffer for diagnostic bus signals requiring precise edge alignment and ESD immunity. Use Value: HBM >2000 V ESD rating meets ISO 10605 requirements; low VOLP minimizes false triggering in analog front-ends. |
Use Scenario: Driving multiple DUT (device-under-test) inputs simultaneously from a single pattern generator channel in automated test fixtures. IC Role / Device Role / Timing Role: Fanout buffer with matched delays ensuring simultaneous signal arrival across parallel test points. Use Value: ≤1.5 ns output skew guarantees sub-nanosecond timing correlation across eight channels - critical for parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | 3.3 V only (no 5V-tolerant inputs); tPD = 5.2 ns typ at 3.3 V/50 pF; same SOIC-20 footprint | Requires external clamping for 5 V inputs; suitable only in pure 3.3 V systems | Select when cost sensitivity outweighs mixed-voltage flexibility and board space permits added protection components |
| 74LVX240M | Same electrical specs and pinout; differs only in packaging marking (non-Pb-free variant) | No functional difference; not compliant with RoHS or JESD204B environmental requirements | Choose only for legacy qualification continuity where Pb-free compliance is not mandated |
Compared with SN74LVC240APWR and 74LVX240M, MC74LVX240MG uniquely combines 5V-tolerant inputs, industrial temperature range, and Pb-free construction - making it the sole option for new designs requiring mixed-voltage interoperability and regulatory compliance without design compromise.
Availability
MC74LVX240MG is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, memory subsystems, and automated test equipment requiring stable component supply across extended temperature ranges and strict environmental compliance.
Supply support for MC74LVX240MG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74LVX240MG belongs to the LVX low-voltage logic family, engineered specifically for mixed-voltage system interfacing with emphasis on 5V-tolerant inputs, low-noise operation, and industrial reliability.
FAQ
What is the maximum input voltage the MC74LVX240MG can safely accept?
The MC74LVX240MG accepts DC input voltages up to +7.0 V regardless of VCC level - a key feature enabling direct connection to 5.0 V buses while operating from a 3.3 V supply. This specification is validated per Absolute Maximum Ratings and confirmed in the Recommended Operating Conditions table of the official datasheet (Rev. 5, November 2024). Exceeding 7.0 V risks permanent damage.
Does the MC74LVX240MG support true bidirectional data flow?
No, the MC74LVX240MG is a unidirectional inverting buffer: data flows strictly from input pins (1D0–1D3, 2D0–2D3) to output pins (1O0–1O3, 2O0–2O3). It lacks internal direction control or bus transceiver architecture. For bidirectional applications, separate transmit/receive buffers or dedicated transceivers like the MC74LVX245 must be used.
Can the MC74LVX240MG operate reliably at 2.0 V supply?
Yes, the MC74LVX240MG is fully specified down to 2.0 V VCC per the Recommended Operating Conditions table. At 2.0 V, tPD increases to 10.1 ns (max) and VOH drops to 1.9 V (min), but all logic thresholds and output drive remain functional across −40°C to +85°C. This makes it suitable for ultra-low-power battery-backed subsystems.
What is the thermal resistance (θJA) of the MC74LVX240MG in SOIC-20 package?
The datasheet does not publish θJA for MC74LVX240MG. However, based on industry-standard SOIC-20 wide-body (Case 751D) thermal models and onsemi's typical characterization, θJA is approximately 110°C/W on a 1-inch² 2-layer PCB with 1 oz copper. For thermal design, use the 180 mW maximum power dissipation rating and derate linearly above 25°C ambient.
Is the MC74LVX240MG pin-compatible with the older 74HC240 series?
No - although both are octal inverting buffers, the MC74LVX240MG uses a different pinout than the 74HC240. Specifically, MC74LVX240MG places 1OE on Pin 1 and 2OE on Pin 19, whereas 74HC240 places both OEs on Pins 1 and 19 but assigns data/output pairs differently (e.g., 1D0 on Pin 2 vs. 1D0 on Pin 2 in MC74LVX240MG). PCB layout revision is required for substitution.
MC74LVX240MG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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-20
MC74LVX240MG FAQ
1.How can I place an order for MC74LVX240MG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LVX240MG 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 MC74LVX240MG reliable?
The price and inventory of MC74LVX240MG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX240MG is usually 5 days.
3.What payment methods are accepted for MC74LVX240MG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX240MG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LVX240MG?
MC74LVX240MG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LVX240MG 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 MC74LVX240MG?
For technical support, including MC74LVX240MG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX240MG requirements.
6.How does Aetrix verify that MC74LVX240MG is sourced from the original manufacturer or authorized distributors?
All MC74LVX240MG 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 MC74LVX240MG meets industry standards.
7.What is the process for return or replacement of MC74LVX240MG?
All MC74LVX240MG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX240MG, 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 MC74LVX240MG part is unused and in its original packaging.
Return procedure for MC74LVX240MG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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