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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

onsemi 74LVX245MTC

Name: 74LVX245MTC
Brand: onsemi
SKU: 74LVX245MTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVX245MTC

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74LVX245MTC.pdf

Description:: IC TXRX NON-INVERT 3.6V 20TSSOP

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Product details

Overview

74LVX245MTC 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 independent transmit/receive (T/R) control, output enable (OE), and high-impedance 3-state operation across all eight channels. Typical propagation delay is 4.7 ns at 3.3 V with 15 pF load, supporting high-speed data transfer in mixed-voltage systems.

For engineers reviewing the 74LVX245MTC datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V tolerance on both A/B ports, guaranteed simultaneous switching noise performance, TSSOP-20 package compatibility, and verified operation from −40 °C to +85 °C in industrial environments.

Technical Context

The 74LVX245MTC implements a dual-bus transceiver architecture where direction is controlled by the active-HIGH T/R signal: HIGH enables A→B flow, LOW enables B→A flow. Output state is independently managed by OE, which forces both A and B ports into high-impedance when HIGH.

It operates within a 2.0–3.6 V supply range while accepting input voltages up to 5.5 V and driving outputs to VCC or GND, enabling safe level translation between 3.3 V logic and legacy 5 V buses. DC electrical characteristics are fully specified across temperature and voltage, including VIH/VIL thresholds, VOH/VOL under load, and 3-state leakage (±0.25 µA max).

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.0 V to 3.6 V - Ensures compatibility with standard 3.3 V systems while allowing margin for rail droop.
Input Voltage Tolerance	−0.5 V to +5.5 V - Enables direct connection to 5 V TTL/CMOS without external level shifters.
Propagation Delay (tPLH/tPHL)	4.7 ns (typ) at 3.3 V, CL = 15 pF - Supports >100 MHz bus timing in short-trace applications.
3-State Enable/Disable Time	7.1 ns / 5.5 ns (typ) at 3.3 V - Minimizes bus contention windows during direction switching.
IOZ (3-State Leakage)	±0.25 µA max at VCC = 3.6 V - Reduces standby current and prevents unintended pull-up/down effects.
Operating Temperature	−40 °C to +85 °C - Qualified for industrial-grade embedded and automotive body electronics.
ESD Rating (HBM)	2000 V - Meets IEC 61000-4-2 Level 2 for board-level robustness in handling and assembly.

Pinout & Package

TSSOP-20 (Case 948AQ), 4.4 mm × 6.5 mm footprint, 0.65 mm pitch, Pb-free, RoHS compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Output Enable Input	Active-HIGH global disable: drives all A/B pins to high-impedance when asserted.
2 (T/R)	Transmit/Receive Control	Active-HIGH selects A→B data flow; active-LOW selects B→A - defines bidirectional bus direction.
3–10 (A0–A7)	Side A I/O Terminals	Bidirectional ports: inputs when receiving, 3-state outputs when transmitting - connect to local bus.
11 (GND)	Ground Reference	Primary return path for VCC and all I/O signals; must be low-inductance connection.
12–19 (B0–B7)	Side B I/O Terminals	Bidirectional ports: inputs when transmitting, 3-state outputs when receiving - interface to remote bus.
20 (VCC)	Power Supply	3.3 V nominal supply; supports 2.0–3.6 V range with full AC/DC specification compliance.

Key Features

Feature	Design Value
5 V Tolerant I/O	Both A and B ports accept 0–5.5 V inputs and drive to VCC or GND - eliminates external clamping diodes in mixed-voltage designs.
Guaranteed Simultaneous Switching Noise (SSN)	Specified dynamic VOLP/VOLV limits (0.5–0.8 V at 3.3 V) ensure signal integrity during multi-bit transitions.
Low Quiescent Current	ICC ≤ 4.0 µA (typ) at 3.6 V - reduces system power budget in always-on interfaces.
Pb-Free & RoHS Compliant	Meets JESD204B and IPC/JEDEC J-STD-020 moisture sensitivity Level 1 - supports lead-free reflow and long-term reliability.

Applications

Industrial PLC Backplane Interface	Embedded Microcontroller Bus Extension
Use Scenario: Isolating and extending 3.3 V MCU address/data bus to 5 V peripheral modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing A/B port direction via T/R and disabling via OE during bus arbitration. Use Value: Eliminates discrete level shifters while maintaining <8 ns propagation delay and <6 ns 3-state switching for deterministic cycle timing.	Use Scenario: Connecting an ARM Cortex-M4 microcontroller's GPIO-controlled parallel bus to legacy 5 V LCD controller or SRAM memory. IC Role / Device Role / Timing Role: Octal buffer providing 5 V tolerant input sampling and 3.3 V compatible output driving with precise enable/disable control. Use Value: Enables direct interface without voltage dividers or MOSFET translators, reducing BOM count and PCB area by ≥3 components per channel.
Automotive Body Control Module	Test Equipment Digital I/O Expansion
Use Scenario: Interfacing 3.3 V CAN/FlexRay microcontroller peripherals to 5 V sensor signal conditioners or relay drivers in BCMs. IC Role / Device Role / Timing Role: Robust bidirectional bus driver with −40 °C to +85 °C operation, ESD-hardened I/O, and low-noise SSN performance. Use Value: Maintains signal fidelity across noisy automotive harnesses while meeting ISO 11898-2 EMC requirements for digital interconnects.	Use Scenario: Adding configurable 8-bit digital I/O capability to automated test equipment using FPGA-based control with 3.3 V logic levels. IC Role / Device Role / Timing Role: Programmable direction and tri-state control allows dynamic reconfiguration of DUT interface lines as inputs or outputs. Use Value: Provides hardware-level flexibility for test pattern generation and response capture without FPGA pin reassignment or firmware reload.

Industrial PLC Backplane Interface

Embedded Microcontroller Bus Extension

Use Scenario: Isolating and extending 3.3 V MCU address/data bus to 5 V peripheral modules in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing A/B port direction via T/R and disabling via OE during bus arbitration.

Use Value: Eliminates discrete level shifters while maintaining <8 ns propagation delay and <6 ns 3-state switching for deterministic cycle timing.

Use Scenario: Connecting an ARM Cortex-M4 microcontroller's GPIO-controlled parallel bus to legacy 5 V LCD controller or SRAM memory.

IC Role / Device Role / Timing Role: Octal buffer providing 5 V tolerant input sampling and 3.3 V compatible output driving with precise enable/disable control.

Use Value: Enables direct interface without voltage dividers or MOSFET translators, reducing BOM count and PCB area by ≥3 components per channel.

Automotive Body Control Module

Test Equipment Digital I/O Expansion

Use Scenario: Interfacing 3.3 V CAN/FlexRay microcontroller peripherals to 5 V sensor signal conditioners or relay drivers in BCMs.

IC Role / Device Role / Timing Role: Robust bidirectional bus driver with −40 °C to +85 °C operation, ESD-hardened I/O, and low-noise SSN performance.

Use Value: Maintains signal fidelity across noisy automotive harnesses while meeting ISO 11898-2 EMC requirements for digital interconnects.

Use Scenario: Adding configurable 8-bit digital I/O capability to automated test equipment using FPGA-based control with 3.3 V logic levels.

IC Role / Device Role / Timing Role: Programmable direction and tri-state control allows dynamic reconfiguration of DUT interface lines as inputs or outputs.

Use Value: Provides hardware-level flexibility for test pattern generation and response capture without FPGA pin reassignment or firmware reload.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC245APWR	Lower ICC (1 µA typ), faster tPLH (3.5 ns typ @ 3.3 V), but only 3.6 V max input tolerance - no 5 V tolerance.	Requires external clamping or level-shifting for 5 V bus connections; unsuitable for direct 5 V interface.	Select when interfacing only 3.3 V systems and lowest power or highest speed is critical.
74ALVC245MTCX	Wider VCC range (1.65–3.6 V), same 5 V tolerance, but higher ICC (10 µA typ) and slower tPLH (6.0 ns typ @ 3.3 V).	Supports 1.8 V logic domains; trade-off is increased propagation delay and quiescent current.	Select when backward compatibility with 1.8 V microcontrollers is required alongside 5 V peripheral support.

Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LVX245MTC uniquely balances 5 V tolerance, industrial temperature range, and sub-5 ns propagation delay at 3.3 V - making it optimal for mixed-voltage industrial and automotive bus bridging where reliability and interface simplicity are prioritized over ultra-low power or sub-1.8 V operation.

Availability

74LVX245MTC is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and embedded microcontroller bus extension requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for 74LVX245MTC 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 74LVX245MTC belongs to onsemi's LVX logic family, engineered specifically for low-noise, low-power 3.3 V bus interfacing with guaranteed 5 V tolerance - targeting industrial control, automotive electronics, and legacy system upgrades.

FAQ

What is the maximum input voltage rating for 74LVX245MTC?

The 74LVX245MTC supports DC input voltages from −0.5 V to +5.5 V on all A and B port pins, regardless of VCC level. This 5 V tolerance allows direct connection to 5 V TTL or CMOS logic without external protection circuitry, as confirmed in the Absolute Maximum Ratings table of the onsemi datasheet (Rev. 2, July 2025).

Does 74LVX245MTC support true bidirectional data flow on each channel?

Yes, the 74LVX245MTC provides true bidirectional operation per channel via the T/R control input: when T/R is HIGH, data flows from A0–A7 to B0–B7; when LOW, data flows from B0–B7 to A0–A7. Both sides function as inputs or 3-state outputs depending on direction, as defined in the Truth Table and Logic Symbols sections of the official datasheet.

What is the typical propagation delay of 74LVX245MTC at 3.3 V supply?

At VCC = 3.3 V ± 0.3 V, CL = 15 pF, and TA = +25 °C, the 74LVX245MTC exhibits a typical propagation delay (tPLH/tPHL) of 4.7 ns. The maximum delay across −40 °C to +85 °C is 8.0 ns under identical conditions, ensuring timing predictability in industrial environments.

Can 74LVX245MTC be used in a 2.5 V system?

Yes, the 74LVX245MTC is fully specified down to VCC = 2.0 V. At 2.5 V, VIH is guaranteed ≥1.5 V and VIL ≤0.5 V, ensuring reliable logic-level recognition. Propagation delay increases to 10.7 ns (max) at 2.7 V with 50 pF load, making it viable for lower-speed 2.5 V applications where timing margins allow.

Is 74LVX245MTC pin-compatible with other octal transceivers like 74LVC245?

No, the 74LVX245MTC is not pin-compatible with 74LVC245 variants. While both use TSSOP-20 packages, the pin assignments differ: 74LVX245MTC places OE on pin 1 and T/R on pin 2, whereas 74LVC245 places T/R on pin 1 and OE on pin 19. PCB layout must be verified against the Connection Diagram in the onsemi datasheet before substitution.

74LVX245MTC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVX

Package/Case:: 20-TSSOP (0.173", 4.40mm 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:: 20-TSSOP

74LVX245MTC FAQ

1.How can I place an order for 74LVX245MTC through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVX245MTC 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 74LVX245MTC reliable?

The price and inventory of 74LVX245MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX245MTC is usually 5 days.

3.What payment methods are accepted for 74LVX245MTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX245MTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVX245MTC?

74LVX245MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVX245MTC 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 74LVX245MTC?

For technical support, including 74LVX245MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX245MTC requirements.

6.How does Aetrix verify that 74LVX245MTC is sourced from the original manufacturer or authorized distributors?

All 74LVX245MTC 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 74LVX245MTC meets industry standards.

7.What is the process for return or replacement of 74LVX245MTC?

All 74LVX245MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX245MTC, 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 74LVX245MTC part is unused and in its original packaging.

Return procedure for 74LVX245MTC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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