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onsemi MC74LVX245MG
- Part No.:
- MC74LVX245MG
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74LVX245MG.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOEIAJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,878
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Product details
Overview
MC74LVX245MG from onsemi is an advanced high-speed CMOS octal bus transceiver with 5 V-tolerant inputs, designed for bidirectional asynchronous data bus communication between 3.3 V and 5 V domains. It features direction control via T/R input, 3-state output enable (OE), 4.7 ns typical propagation delay at 3.3 V, ±25 mA output drive per pin, and operates from −40 °C to +85 °C.
For engineers reviewing the MC74LVX245MG datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V-tolerant input compatibility, bidirectional bus isolation capability, SOIC-20W package footprint, and guaranteed 3.3 V supply operation with sub-10 ns timing performance.
Technical Context
The MC74LVX245MG implements a dual-bus, 8-bit transceiver architecture with independent OE and T/R control logic. Its 5 V-tolerant inputs allow direct connection to 5 V logic while powered from 3.3 V, eliminating level-shifting components in mixed-voltage systems.
It supports true 3-state outputs with low noise characteristics (VOLP ≤ 0.8 V), balanced propagation delays (tPLH/tPHL skew ≤ 1.5 ns), and latchup immunity exceeding 100 mA - enabling robust operation in industrial backplane and peripheral interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - ensures compatibility with 3.3 V systems and tolerance for rail variation without external regulation |
| tPD (Typ) | 4.7 ns at VCC = 3.3 V, CL = 15 pF - enables high-speed data transfer up to ~100 MHz in short-bus configurations |
| Input Voltage Max | −0.5 V to +6.5 V - allows safe interfacing with 5 V signals while operating at 3.3 V supply |
| IOUT (per pin) | ±25 mA - sufficient to drive standard TTL loads or multiple CMOS inputs without buffering |
| Operating Temp | −40 °C to +85 °C - qualified for industrial temperature environments without derating |
| ESD HBM | >2000 V - provides built-in protection against handling electrostatic discharge during assembly |
| ICC (Max) | 4.0 µA at TA = 25 °C - ultra-low static power consumption ideal for battery-backed or always-on subsystems |
Pinout & Package
MC74LVX245MG is housed in a Pb-free SOIC-20 wide-body package (Case 751D), measuring 12.8 mm × 7.5 mm × 2.65 mm with 1.27 mm pitch. The package is moisture sensitivity level (MSL) 3 and rated for reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | T/R | Transmit/Receive control: LOW routes B→A, HIGH routes A→B; determines data flow direction |
| 2–9 | A0–A7 | Side-A bidirectional I/O pins: 3-state capable; connect to local 3.3 V bus or controller side |
| 11–18 | B0–B7 | Side-B bidirectional I/O pins: 3-state capable; interface to 5 V peripherals or legacy buses |
| 19 | OE | Output Enable: LOW enables transceiver; HIGH places all A/B pins in high-impedance state for bus isolation |
| 10 | GND | Ground reference for logic and power return path |
| 20 | VCC | Positive supply input: must be connected to 3.3 V rail; powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Supports direct connection to 5 V logic without external level shifters, reducing BOM count and board space |
| Low-noise output switching | VOLP ≤ 0.8 V ensures minimal ground bounce and signal integrity degradation in dense PCB layouts |
| High-speed propagation | 4.7 ns typical tPD at 3.3 V enables reliable operation in 20–30 ns clock domain interfaces |
| Power-down input protection | Inputs remain protected even when VCC = 0 V, preventing damage during hot-insertion or partial power-up sequences |
| Latchup immunity | Exceeds 100 mA per JEDEC JESD78 Class II - critical for reliability in noisy industrial environments |
Applications
| Industrial PLC Backplane Interface | Embedded Controller Expansion Bus |
|---|---|
|
Use Scenario: Interfacing a 3.3 V ARM-based controller to legacy 5 V I/O modules across a DIN-rail mounted backplane. IC Role / Device Role / Timing Role: Bidirectional voltage-level translating transceiver managing data flow direction and bus isolation under firmware control. Use Value: Eliminates need for discrete level shifters while maintaining <10 ns timing margin for 25 MHz synchronous transfers. |
Use Scenario: Expanding GPIO and parallel data paths from a microcontroller unit to external peripherals such as LCD controllers or ADC/DAC arrays. IC Role / Device Role / Timing Role: Octal bus buffer with configurable direction and 3-state control, synchronized to system clock edges. Use Value: Provides deterministic 8-bit parallel throughput with guaranteed 4.7 ns propagation delay and low inter-pin skew. |
| Automotive Diagnostic Interface Adapter | Test Equipment Signal Conditioning Module |
|
Use Scenario: Bridging CAN microcontroller UART peripherals to 5 V RS-232 or LIN transceivers in vehicle diagnostic tools. IC Role / Device Role / Timing Role: Isolated bidirectional data conduit with OE-controlled bus disconnection during fault conditions. Use Value: Enables safe hot-swap of test cables by placing both sides in high-impedance state via OE assertion. |
Use Scenario: Conditioning digital stimulus/response signals between automated test equipment and DUTs operating at mismatched voltage levels. IC Role / Device Role / Timing Role: Repeater and level translator ensuring signal fidelity across mixed-voltage test fixtures. Use Value: Delivers sub-1.5 ns output-to-output skew and ESD-hardened I/O for repeatable measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Operates at 1.65–3.6 V; 5 V-tolerant inputs only up to VCC + 0.5 V (not full 5 V); slightly higher ICC (10 µA max) | Less suitable for direct 5 V input interfacing without clamping; requires tighter VCC regulation | Prefer MC74LVX245MG where true 5 V input tolerance and lower quiescent current are required |
| 74ALVC245MTCX | Faster tPD (3.2 ns typ), but only 3.6 V max input rating; no explicit 5 V-tolerance guarantee; higher VOLP (1.2 V) | Not recommended for 5 V signal domains; better suited for high-speed 3.3 V-only systems | Choose MC74LVX245MG for mixed-voltage isolation; select 74ALVC245MTCX only if speed > tolerance is primary requirement |
Compared with SN74LVC245APWR and 74ALVC245MTCX, the MC74LVX245MG uniquely guarantees full 5 V input tolerance at 3.3 V supply, delivers lower static current (4 µA vs ≥10 µA), and maintains tighter noise margins (VOLP ≤ 0.8 V), making it optimal for industrial voltage-domain bridging.
Availability
MC74LVX245MG is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded controller expansion buses, automotive diagnostic adapters, and test equipment signal conditioning modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC74LVX245MG 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 MC74LVX245MG belongs to onsemi's LVX low-voltage logic family, engineered specifically for robust mixed-voltage interfacing in industrial and automotive control systems where 5 V-tolerant 3.3 V operation is essential.
FAQ
What is the maximum input voltage rating for MC74LVX245MG?
The MC74LVX245MG supports DC input voltages from −0.5 V to +6.5 V on all pins, including T/R and OE. This full 5 V tolerance allows direct connection to 5 V logic signals while operating from a 3.3 V supply - a key differentiator versus standard LVC-family transceivers that only tolerate VCC + 0.5 V.
Does MC74LVX245MG support hot-plug operation?
Yes, the MC74LVX245MG includes power-down input protection: its inputs remain electrically safe even when VCC = 0 V. This enables use in hot-plug scenarios such as modular backplanes or field-replaceable I/O cards where power sequencing cannot be guaranteed.
What is the propagation delay specification for MC74LVX245MG at 3.3 V?
The MC74LVX245MG has a typical propagation delay (tPLH/tPHL) of 4.7 ns at VCC = 3.3 V with CL = 15 pF. The maximum delay across temperature and voltage is 11.5 ns, supporting reliable operation in 25 MHz synchronous bus applications with adequate setup/hold margin.
Can MC74LVX245MG be used to interface 5 V and 3.3 V buses bidirectionally?
Yes - the MC74LVX245MG is explicitly designed for this purpose. Its 5 V-tolerant inputs accept 5 V logic levels on either A or B side, while its outputs swing rail-to-rail within the 3.3 V supply range. Direction is controlled by the T/R pin, and bus isolation is achieved via OE.
What package type is used for MC74LVX245MG?
The MC74LVX245MG uses a Pb-free SOIC-20 wide-body package (Case 751D), with dimensions 12.8 mm × 7.5 mm × 2.65 mm and 1.27 mm lead pitch. It is MSL Level 3 and compatible with standard reflow profiles per JEDEC J-STD-020.
MC74LVX245MG 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:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- 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
MC74LVX245MG FAQ
1.How can I place an order for MC74LVX245MG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LVX245MG 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 MC74LVX245MG reliable?
The price and inventory of MC74LVX245MG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LVX245MG is usually 5 days.
3.What payment methods are accepted for MC74LVX245MG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LVX245MG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LVX245MG?
MC74LVX245MG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LVX245MG 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 MC74LVX245MG?
For technical support, including MC74LVX245MG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LVX245MG requirements.
6.How does Aetrix verify that MC74LVX245MG is sourced from the original manufacturer or authorized distributors?
All MC74LVX245MG 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 MC74LVX245MG meets industry standards.
7.What is the process for return or replacement of MC74LVX245MG?
All MC74LVX245MG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LVX245MG, 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 MC74LVX245MG part is unused and in its original packaging.
Return procedure for MC74LVX245MG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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