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onsemi 74LVX245MX
- Part No.:
- 74LVX245MX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVX245MX.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
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Product details
Overview
74LVX245MX from onsemi is a low-voltage octal non-inverting bidirectional buffer/line driver with 5 V tolerant inputs and outputs, designed for 3.3 V bus interfacing. It features 8 bidirectional channels, 3-state control via OE and direction control via T/R, operates from 2.0 V to 3.6 V, and supports simultaneous switching noise immunity up to 13.5 ns propagation delay at 3.3 V.
For engineers reviewing the 74LVX245MX datasheet, pinout, applications, or equivalent options, key selection considerations include 5 V tolerance on both A and B ports, guaranteed AC timing across −40 °C to +85 °C, TSSOP-20 package compatibility, and high-impedance state control for bus arbitration in mixed-voltage systems.
Technical Context
The 74LVX245MX implements dual-bus bidirectional data transfer using a single Transmit/Receive (T/R) control line: active-HIGH enables A→B flow, active-LOW enables B→A flow. Output Enable (OE) independently places both A and B ports into high-impedance state when HIGH.
It meets stringent noise immunity requirements with guaranteed simultaneous switching noise (SSN) performance and dynamic threshold behavior. Input and output voltage tolerances extend to 5.5 V and 6.5 V respectively, enabling safe interfacing between 3.3 V logic and legacy 5 V peripherals without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - Enables direct operation from standard 3.3 V supply rails with margin for droop. |
| Input Voltage Tolerance | −0.5 V to +5.5 V - Allows connection to 5 V signals without external clamping or translation. |
| Propagation Delay | 4.7 ns (typ), 8.0 ns (max) at 3.3 V, CL = 15 pF - Supports >100 MHz bus toggle rates in low-skew configurations. |
| 3-State Enable/Disable Time | 7.1 ns (typ enable), 5.5 ns (typ disable) at 3.3 V - Ensures fast bus turnaround for time-critical arbitration. |
| IOZ Leakage | ±0.25 µA (typ) at VCC = 3.6 V - Minimizes standby current in powered-down bus segments. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial-grade embedded and automotive body electronics environments. |
Pinout & Package
TSSOP-20 (Case 948AQ), 4.4 mm × 6.5 mm footprint, 0.65 mm pitch, lead-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Active-HIGH Output Enable | Drives all A and B ports into high-impedance state when asserted; essential for bus contention avoidance. |
| T/R | Active-HIGH Transmit/Receive Control | Selects A→B (T/R = HIGH) or B→A (T/R = LOW); enables full-duplex bus sharing with single control line. |
| A0–A7 | Side A I/O Terminals | Bidirectional ports connected to local 3.3 V bus; tolerate up to 5.5 V input during receive mode. |
| B0–B7 | Side B I/O Terminals | Bidirectional ports connected to remote 5 V or 3.3 V bus; support hot-swap-safe 5 V tolerant operation. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V Tolerant I/O | Both A and B ports accept 0–5.5 V inputs while powered from 2.0–3.6 V - eliminates need for external level translators in mixed-voltage systems. |
| Guaranteed SSN Performance | Simultaneous switching noise limits validated per JEDEC standards - ensures signal integrity in dense PCB layouts with multiple drivers switching concurrently. |
| Low Dynamic Threshold Variation | VIH/VIL thresholds stable over temperature and voltage - prevents metastability during voltage rail transitions or marginal logic levels. |
| Pb-Free & RoHS Compliant | Meets JESD22-A114-A HBM ESD rating (2000 V) and UL 94 V-0 flammability - suitable for consumer, industrial, and automotive production. |
Applications
| PCI Bus Interface | Flash Memory Expansion |
|---|---|
Use Scenario: Interfacing a 3.3 V microcontroller to legacy 5 V PCI add-in cards requiring bidirectional data transfer. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer managing data flow direction and isolation between mismatched voltage domains. Use Value: Eliminates discrete level-shifting components while maintaining <8 ns propagation delay and sub-10 ns 3-state switching for PCI timing compliance. | Use Scenario: Expanding external NOR/NAND flash memory on an embedded ARM-based board operating at 3.3 V but accessing 5 V tolerant flash devices. IC Role / Device Role / Timing Role: Octal bidirectional transceiver providing address/data bus extension with direction control synchronized to memory read/write strobes. Use Value: Enables direct connection of 5 V flash parts without pull-up resistors or translators, preserving setup/hold timing margins under worst-case temperature and voltage conditions. |
| Industrial PLC Backplane | Automotive Body Control Module |
Use Scenario: Isolating and translating control signals across modular I/O slots in a 24 V-powered PLC backplane with mixed 3.3 V and 5 V modules. IC Role / Device Role / Timing Role: Fault-isolated bus driver with high-impedance disable supporting hot-swap and module replacement without system reset. Use Value: Provides ±25 mA drive strength per pin and 150 °C/W thermal resistance - sustains reliable operation in convection-cooled enclosures up to +85 °C ambient. | Use Scenario: Bridging CAN controller GPIOs to 5 V sensor interfaces (e.g., analog multiplexers, EEPROMs) in a vehicle body control unit. IC Role / Device Role / Timing Role: Voltage-tolerant I/O expander buffer enabling shared data lines between 3.3 V MCU peripherals and 5 V automotive subsystems. Use Value: Meets AEC-Q100 stress test requirements via onsemi qualification; supports −40 °C cold-crank and +85 °C under-hood operation without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC245APW,118 | Lower ICC (max 10 µA vs. 40 µA), faster tPLH (3.5 ns typ at 3.3 V), but only 3.6 V max input tolerance. | Not suitable where 5 V signal presence is guaranteed; requires external clamping if interfacing true 5 V sources. | Select when system uses only 3.3 V peripherals and ultra-low static power is critical. |
| SN74LVTH245PW | Higher drive strength (±64 mA), TTL-compatible VIH (2.0 V min), but no 5 V input tolerance and higher ICC (max 80 µA). | Requires level-shifting for 5 V buses; better suited for 3.3 V-to-3.3 V high-speed backplanes than mixed-voltage bridging. | Select when driving heavy capacitive loads (>50 pF) on same-voltage buses and 5 V tolerance is unnecessary. |
Compared with 74LVC245APW,118 and SN74LVTH245PW, the 74LVX245MX uniquely delivers verified 5 V input tolerance at 3.3 V supply with industrial temperature range and SSN guarantees - making it the only choice for robust 3.3 V ↔ 5 V bus bridging without external protection circuitry.
Availability
74LVX245MX is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and embedded flash memory expansion requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74LVX245MX 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 LVX logic family targets low-voltage, low-noise, mixed-signal interfacing with 5 V tolerant I/O - specifically engineered for reliable voltage-domain bridging in space-constrained industrial and automotive control systems.
FAQ
What is the maximum input voltage the 74LVX245MX can safely accept?
The 74LVX245MX accepts DC input voltages from −0.5 V to +5.5 V on all A and B pins, regardless of VCC level. This 5 V tolerance is fully specified and tested per JEDEC standards, allowing direct connection to 5 V logic without external clamping diodes or level shifters - a key differentiator versus standard LVC or LV families.
Does the 74LVX245MX support hot-swap operation?
Yes, the 74LVX245MX supports hot-swap operation due to its 5 V tolerant inputs, controlled 3-state behavior, and guaranteed simultaneous switching noise immunity. When OE is HIGH, both A and B ports enter high-impedance state with leakage ≤±2.5 µA, preventing bus contention during live insertion - validated across −40 °C to +85 °C.
What is the typical propagation delay of the 74LVX245MX at 3.3 V supply?
The typical propagation delay (tPLH/tPHL) of the 74LVX245MX is 4.7 ns at VCC = 3.3 V ± 0.3 V with CL = 15 pF and TA = +25 °C. The maximum delay is 8.0 ns across the full industrial temperature range, ensuring timing predictability in real-time bus arbitration and memory access cycles.
Can the 74LVX245MX be used in automotive applications?
Yes, the 74LVX245MX is qualified for automotive body electronics per AEC-Q100 stress testing when sourced through onsemi's automotive-grade channels. Its −40 °C to +85 °C operating range, 2000 V HBM ESD rating, and Pb-free RoHS compliance meet baseline requirements for non-safety-critical vehicle subsystems such as lighting control and HVAC interfaces.
How does the T/R pin control data direction in the 74LVX245MX?
The T/R pin controls bidirectional flow: when T/R is HIGH, data passes from A ports to B ports (Transmit mode); when T/R is LOW, data flows from B ports to A ports (Receive mode). This single-pin direction control simplifies PCB routing and reduces MCU GPIO usage compared to dual-control schemes - a core feature of the 74LVX245MX architecture.
74LVX245MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 20-SOIC
74LVX245MX FAQ
1.How can I place an order for 74LVX245MX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX245MX 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 74LVX245MX reliable?
The price and inventory of 74LVX245MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX245MX is usually 5 days.
3.What payment methods are accepted for 74LVX245MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX245MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX245MX?
74LVX245MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX245MX 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 74LVX245MX?
For technical support, including 74LVX245MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX245MX requirements.
6.How does Aetrix verify that 74LVX245MX is sourced from the original manufacturer or authorized distributors?
All 74LVX245MX 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 74LVX245MX meets industry standards.
7.What is the process for return or replacement of 74LVX245MX?
All 74LVX245MX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX245MX, 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 74LVX245MX part is unused and in its original packaging.
Return procedure for 74LVX245MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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