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onsemi MC74LVX240DWR
- Part No.:
- MC74LVX240DWR
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
MC74LVX240DWR.pdf
- Description:
- IC INVERTER DUAL 4-INPUT 20SOIC
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Inventory:1,000
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Product details
Overview
MC74LVX240DWR from onsemi is an advanced high-speed CMOS octal bus buffer with dual active-low 3-state outputs, inverting logic function, and 5V-tolerant inputs (up to 7.0 V). It operates from 2.0 V to 3.6 V, delivers 4.3 ns typical propagation delay at 3.3 V, supports ±25 mA output drive, and is used in 3.3 V/5.0 V mixed-voltage memory address/data bus interfacing.
For engineers reviewing the MC74LVX240DWR datasheet, pinout, applications, or equivalent options, key selection criteria include 5V-tolerant input compatibility, dual independent output enables, SOIC-20 package mechanical dimensions, 3-state timing (tPZL/tPLZ), and DC electrical limits for VIH/VIL across temperature.
Technical Context
The MC74LVX240DWR implements two independent 4-bit inverting 3-state buffers, each controlled by its own active-low output enable (1OE, 2OE). Inputs tolerate up to 7.0 V regardless of VCC, enabling robust level translation between 5.0 V peripherals and 3.3 V logic domains.
Its architecture features balanced propagation delays (tPLH ≈ tPHL), low dynamic noise (VOLP ≤ 0.8 V), and latch-up immunity exceeding 300 mA. The device meets ESD requirements per Human Body Model (>2000 V) and Machine Model (>200 V), and is Pb-free/RoHS compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - Enables operation in standard 3.3 V systems with margin for supply variation. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - Allows direct connection to 5 V signals without external level shifters. |
| tPD (Typ) | 4.3 ns at VCC = 3.3 V, CL = 15 pF - Supports >100 MHz bus toggle rates in high-speed digital interfaces. |
| IOUT (Max) | ±25 mA per output - Sufficient to drive multiple TTL loads or moderate-capacitance PCB traces. |
| VIH / VIL | VIH = 2.4 V (min), VIL = 0.8 V (max) at VCC = 3.3 V - Ensures reliable logic recognition with noise margin. |
| ICC (Max) | 4.0 µA at TA = 25°C - Ultra-low quiescent current ideal for battery-backed or power-sensitive systems. |
| Operating Temp | −40°C to +85°C - Qualified for industrial-grade embedded control and communications equipment. |
Pinout & Package
MC74LVX240DWR is housed in a 20-pin SOIC package (Case 751D, DW suffix), 7.5 mm × 12.8 mm body, 1.27 mm pitch, with standard JEDEC SOIC-20 footprint and thermal profile compatible with reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls first/second 4-bit buffer group independently. |
| 2, 4, 6, 8 | 1D0–1D3 | Data inputs for first inverting buffer group (n = 0–3). |
| 3, 5, 7, 9 | 1O0–1O3 | Inverted, 3-state outputs for first buffer group - high-impedance when 1OE = HIGH. |
| 11, 13, 15, 17 | 2D0–2D3 | Data inputs for second inverting buffer group. |
| 12, 14, 16, 18 | 2O0–2O3 | Inverted, 3-state outputs for second buffer group - high-impedance when 2OE = HIGH. |
| 10 | GND | Ground reference for all logic and I/O circuits. |
| 20 | VCC | Positive supply rail (2.0–3.6 V); powers internal logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Supports direct interface to legacy 5 V logic without external resistors or translators. |
| Dual independent 3-state enables | Enables selective isolation of two 4-bit data paths - critical for bidirectional bus arbitration. |
| Low dynamic noise (VOLP ≤ 0.8 V) | Reduces crosstalk and ground bounce in dense PCB layouts with shared return paths. |
| Power-down input protection | Prevents unintended current flow when VCC = 0 V but inputs remain asserted - avoids back-powering. |
| Pb-free / RoHS compliant | Meets global environmental compliance requirements for industrial and commercial end equipment. |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating and driving 32-bit address lines from a 3.3 V microcontroller to external 5 V SRAM or Flash memory. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout amplification, and bus contention control via OE pins. Use Value: Eliminates need for discrete level shifters while maintaining timing integrity (tPLH/tPHL ≤ 6.8 ns @ 3.3 V) and noise margin (VIL = 0.8 V). |
Use Scenario: Expanding GPIO count of an ARM Cortex-M3 MCU by connecting parallel peripherals (LCD, keypad, ADC) to a shared data bus. IC Role / Device Role / Timing Role: Octal inverting buffer with dual OE control enables time-multiplexed access to multiple peripherals without bus conflicts. Use Value: Dual OE allows independent gating of two 4-bit segments - simplifies software-controlled peripheral selection and reduces firmware overhead. |
| Industrial I/O Module Interface | Legacy System Integration |
|
Use Scenario: Interfacing a modern 3.3 V FPGA-based controller to legacy 5 V industrial sensors and actuators over parallel control buses. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus driver with 5 V-tolerant inputs and 3.3 V-compatible outputs. Use Value: Input tolerance up to 7.0 V ensures robustness against transient overvoltage on field wiring, reducing system-level protection component count. |
Use Scenario: Retrofitting a 5 V ISA-bus industrial PC with low-power 3.3 V logic for real-time monitoring functions. IC Role / Device Role / Timing Role: Inverting buffer isolating new 3.3 V subsystem from noisy 5 V backplane while preserving signal polarity. Use Value: Pin- and function-compatible with industry-standard 74-series octal buffers - enables drop-in replacement without board redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | Wider VCC range (1.65–3.6 V); lower ICC (10 µA max); no 5 V input tolerance - requires external clamping. | Suitable only in pure 3.3 V systems; not recommended for mixed-voltage interfacing. | Select when lowest static power is critical and 5 V inputs are absent. |
| 74LVX240M | Same core logic and 5 V-tolerant inputs; offered in TSSOP-20 (DT suffix) instead of SOIC-20. | Identical functionality but smaller footprint (4.4 mm × 6.5 mm vs. 7.5 mm × 12.8 mm) - preferred for space-constrained designs. | Select for higher board density; verify thermal derating and soldering process compatibility. |
Compared with SN74LVC240APWR and 74LVX240M, the MC74LVX240DWR uniquely combines 5 V input tolerance, SOIC-20 manufacturability, and industrial temperature support - making it optimal for retrofit and mixed-voltage industrial control applications where reliability and compatibility outweigh ultra-low-power needs.
Availability
MC74LVX240DWR is available at Aetrix Electronics and suitable for industrial control systems, legacy system upgrades, and mixed-voltage memory interfacing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MC74LVX240DWR 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, and IoT applications.
The MC74LVX240DWR belongs to the LVX low-voltage logic family, designed specifically for seamless voltage translation and interoperability between 3.3 V and 5 V digital systems in industrial and embedded environments.
FAQ
What is the maximum input voltage rating for MC74LVX240DWR?
The MC74LVX240DWR supports DC input voltages from −0.5 V to +7.0 V, independent of VCC. This 5 V-tolerant capability allows direct connection to 5 V logic signals even when powered from 3.3 V, eliminating external level-shifting components in mixed-voltage designs. The absolute maximum rating is strictly limited to +7.0 V - exceeding this may cause permanent damage.
Does MC74LVX240DWR support true 3-state operation with high-impedance outputs?
Yes, MC74LVX240DWR provides true 3-state outputs. When either 1OE or 2OE is driven HIGH, the corresponding group of four outputs (1O0–1O3 or 2O0–2O3) enters high-impedance mode - electrically disconnecting from the bus. This behavior is verified across the full operating temperature range (−40°C to +85°C) and supports bus-sharing architectures without contention.
What is the typical propagation delay of MC74LVX240DWR at 3.3 V supply?
The MC74LVX240DWR exhibits a typical propagation delay (tPD) of 4.3 ns at VCC = 3.3 V with CL = 15 pF, as specified in the AC Electrical Characteristics table. This value applies to both rising and falling edges (tPLH/tPHL), and represents guaranteed performance under standard test conditions - enabling reliable timing analysis for 100+ MHz digital bus applications.
Is MC74LVX240DWR pin-compatible with standard 74-series octal buffers?
Yes, MC74LVX240DWR is pin- and function-compatible with industry-standard 74AC240, 74HC240, and 74LS240 devices in SOIC-20 packages. Its pinout matches JEDEC-standard assignments for octal inverting buffers with dual output enables, allowing direct substitution in existing designs - provided voltage and timing requirements align with the LVX family's 2.0–3.6 V operation.
What package type does MC74LVX240DWR use, and what are its key mechanical dimensions?
MC74LVX240DWR uses a 20-pin SOIC package (Case 751D, DW suffix), measuring 7.5 mm × 12.8 mm with 1.27 mm lead pitch. It conforms to JEDEC MS-013 standards and supports standard reflow soldering profiles. The package includes exposed pad variants only in other suffixes - the DWR variant has no thermal pad and relies on standard SOIC thermal dissipation characteristics.
MC74LVX240DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC74LVX240DWR FAQ
1.How can I place an order for MC74LVX240DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LVX240DWR 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 MC74LVX240DWR reliable?
The price and inventory of MC74LVX240DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX240DWR is usually 5 days.
3.What payment methods are accepted for MC74LVX240DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX240DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LVX240DWR?
MC74LVX240DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LVX240DWR 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 MC74LVX240DWR?
For technical support, including MC74LVX240DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX240DWR requirements.
6.How does Aetrix verify that MC74LVX240DWR is sourced from the original manufacturer or authorized distributors?
All MC74LVX240DWR 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 MC74LVX240DWR meets industry standards.
7.What is the process for return or replacement of MC74LVX240DWR?
All MC74LVX240DWR units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX240DWR, 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 MC74LVX240DWR part is unused and in its original packaging.
Return procedure for MC74LVX240DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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