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

Texas Instruments 74AVC4T245QRGYRQ1

Name: 74AVC4T245QRGYRQ1
Brand: Texas Instruments
SKU: 74AVC4T245QRGYRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AVC4T245QRGYRQ1

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-VFQFN Exposed Pad

Datasheet:: 74AVC4T245QRGYRQ1.pdf

Description:: IC TRANSLATION TXRX 3.6V 16VQFN

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Product details

Overview

74AVC4T245QRGYRQ1 from Texas Instruments is an automotive-qualified 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V rails (e.g., 1.8V ↔ 3.3V), with 3-state outputs, I_off partial-power-down support, and 380Mbps max data rate at 1.8V→3.3V translation. It serves as a level-shifting interface in infotainment domain controllers.

For engineers reviewing the 74AVC4T245QRGYRQ1 datasheet, 74AVC4T245QRGYRQ1 pinout, 74AVC4T245QRGYRQ1 application, or 74AVC4T245QRGYRQ1 equivalent, key selection criteria include A/B port voltage independence, VCCA-referenced control inputs, 4.6V I/O tolerance, thermal pad grounding requirement, and AEC-Q100 Grade 1 qualification for under-hood telematics use.

Technical Context

The device implements two independent 2-bit bidirectional translation channels, each controlled by dedicated DIR and OE pins referenced to VCCA. Its dual-rail architecture isolates A-port logic (VCCA) from B-port logic (VCCB), enabling asynchronous voltage domain bridging without shared supply constraints.

Functional mode selection follows a strict truth table: OE = L + DIR = L enables B→A data flow; OE = L + DIR = H enables A→B flow; OE = H forces both ports into high-impedance isolation regardless of DIR state. VCC isolation ensures automatic Hi-Z if either VCCA or VCCB drops to GND.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage range (VCCA/VCCB)	1.2V to 3.6V per rail - supports translation across 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external biasing
Max data rate	380Mbps (1.8V→3.3V) - enables high-speed inter-SoC communication in head unit display interfaces
I/O tolerance	4.6V - allows safe interfacing with legacy 3.3V or 5V-tolerant peripherals without clamping diodes
ESD rating (HBM)	±8 kV - meets AEC-Q100 H3B for robustness in automotive assembly and field environments
Operating temp	–40°C to +125°C ambient - qualified for engine bay and dashboard-mounted cluster applications
Propagation delay (A→B)	2.6 ns typical (VCCA=3.3V, VCCB=3.3V) - ensures timing-critical signal integrity in real-time CAN/FlexRay gateway buffers
I_off leakage	±5 μA max (–40°C to 125°C) - prevents backflow current during MCU sleep states in battery-sensitive telematics modules

Pinout & Package

VQFN-16 (RGY) package, 4mm × 3.5mm body with exposed thermal pad requiring connection to PCB ground plane for thermal management and EMI suppression.

Pin/Terminal	Circuit Role	Design Meaning
VCCA	A-port power supply	Supplies A-side I/Os and all control inputs (DIR/OE); sets VIH/VIL thresholds for controls
VCCB	B-port power supply	Supplies B-side I/Os only; independent of VCCA for true dual-voltage operation
1A1, 1A2, 2A1, 2A2	A-port data I/Os	Bi-directional signals referenced to VCCA; must be driven to valid logic levels to avoid excess ICCZ
1B1, 1B2, 2B1, 2B2	B-port data I/Os	Bi-directional signals referenced to VCCB; tolerate up to 4.6V regardless of VCCB setting
1DIR, 2DIR	Direction control inputs	Active-High; determine data flow direction per channel (A→B or B→A) when OE = L
1OE, 2OE	Output-enable inputs	Active-Low; place corresponding port outputs in high-impedance when asserted high
GND (pins 8,9)	Ground reference	Dual ground pins reduce impedance; thermal pad must be connected to GND for thermal performance

Key Features

Feature	Design Value
Configurable dual-rail operation	Independent VCCA/VCCB supplies enable simultaneous 1.2V↔2.5V and 1.8V↔3.3V translation on same device
VCC isolation	Automatic Hi-Z on both ports if either VCCA or VCCB = GND - prevents latch-up during power sequencing
Function safety capable	Supports ISO 26262 ASIL-B system integration via diagnostic-ready control signaling and failure-mode predictability
Thermal pad design	Exposed copper pad improves θ_JA to 68.8°C/W (RGY) - critical for sustained 380Mbps operation in sealed cluster enclosures
Partial power-down (I_off)	Disables output drivers when VCC = 0, blocking reverse current paths during MCU deep-sleep modes

Applications

Telematics Gateway	Instrument Cluster
Use Scenario: Bridging low-voltage ADAS sensor hub (1.8V) to cellular modem (3.3V) in LTE-connected vehicle tracking units. IC Role / Device Role / Timing Role: Bidirectional level translator managing UART/SDIO data flow with sub-3ns propagation delay to preserve protocol timing margins. Use Value: Eliminates need for discrete level shifters and reduces BOM count while maintaining AEC-Q100 compliance across full temperature range.	Use Scenario: Interfacing 1.2V microcontroller GPIOs to 2.5V TFT display driver in digital instrument clusters. IC Role / Device Role / Timing Role: Voltage-domain isolator enabling direct MCU-to-display control without external pull-ups or level-shifting resistors. Use Value: Reduces layout complexity and signal skew vs. resistor-based solutions, supporting 60Hz refresh rate with deterministic timing.
Infotainment Head Unit	Navigation System
Use Scenario: Translating I²C signals between 1.5V application processor and 3.3V audio codec in automotive infotainment head units. IC Role / Device Role / Timing Role: Bi-directional open-drain translator with VCCA-referenced control ensuring correct I²C ACK/NACK timing across voltage domains. Use Value: Maintains I²C bus integrity without clock stretching penalties, supporting multi-master arbitration at 400 kHz.	Use Scenario: Enabling SPI communication between 1.8V GPS baseband IC and 2.5V RF front-end in embedded navigation modules. IC Role / Device Role / Timing Role: Full-duplex level shifter handling MOSI/MISO/SCLK with matched A→B and B→A propagation delays. Use Value: Enables synchronous SPI transfers up to 25 MHz without phase misalignment or setup/hold violations.

Telematics Gateway

Instrument Cluster

Use Scenario: Bridging low-voltage ADAS sensor hub (1.8V) to cellular modem (3.3V) in LTE-connected vehicle tracking units.

IC Role / Device Role / Timing Role: Bidirectional level translator managing UART/SDIO data flow with sub-3ns propagation delay to preserve protocol timing margins.

Use Value: Eliminates need for discrete level shifters and reduces BOM count while maintaining AEC-Q100 compliance across full temperature range.

Use Scenario: Interfacing 1.2V microcontroller GPIOs to 2.5V TFT display driver in digital instrument clusters.

IC Role / Device Role / Timing Role: Voltage-domain isolator enabling direct MCU-to-display control without external pull-ups or level-shifting resistors.

Use Value: Reduces layout complexity and signal skew vs. resistor-based solutions, supporting 60Hz refresh rate with deterministic timing.

Infotainment Head Unit

Navigation System

Use Scenario: Translating I²C signals between 1.5V application processor and 3.3V audio codec in automotive infotainment head units.

IC Role / Device Role / Timing Role: Bi-directional open-drain translator with VCCA-referenced control ensuring correct I²C ACK/NACK timing across voltage domains.

Use Value: Maintains I²C bus integrity without clock stretching penalties, supporting multi-master arbitration at 400 kHz.

Use Scenario: Enabling SPI communication between 1.8V GPS baseband IC and 2.5V RF front-end in embedded navigation modules.

IC Role / Device Role / Timing Role: Full-duplex level shifter handling MOSI/MISO/SCLK with matched A→B and B→A propagation delays.

Use Value: Enables synchronous SPI transfers up to 25 MHz without phase misalignment or setup/hold violations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC4T245QPWRQ1	Lower max data rate (240Mbps), no 1.2V VCCA support, higher VOL at 1.2V	Not suitable for 1.2V↔1.5V translation; limited to ≥1.65V systems	Select when cost sensitivity outweighs ultra-low-voltage support and speed requirements
NLSX4014MUTAG	Auto-direction sensing (no DIR pin), lower drive strength (8mA vs 12mA), no AEC-Q100 Grade 1 rating	Requires external direction control logic; not qualified for under-hood ambient temperatures	Select for space-constrained consumer-grade modules where automotive qualification is unnecessary

Compared with SN74LVC4T245QPWRQ1 and NLSX4014MUTAG, the 74AVC4T245QRGYRQ1 uniquely supports 1.2V operation, delivers 380Mbps throughput, and provides full AEC-Q100 Grade 1 qualification - making it the only option for next-generation 1.2V automotive SoC interconnects requiring functional safety alignment.

Availability

74AVC4T245QRGYRQ1 is available at Aetrix Electronics and suitable for telematics gateways, instrument clusters, and infotainment head units requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for 74AVC4T245QRGYRQ1 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with deep automotive design expertise and manufacturing scale.

The SN74AVC4T245-Q1 product line targets automotive domain controllers requiring robust, low-voltage bidirectional level translation with functional safety readiness and AEC-Q100 compliance.

FAQ

What automotive qualification does the 74AVC4T245QRGYRQ1 meet?

The 74AVC4T245QRGYRQ1 is AEC-Q100 qualified for Device Temperature Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±8 kV and CDM rating of ±1 kV. This certification validates its reliability in engine compartment and dashboard-mounted automotive electronics where thermal and ESD stress are severe.

How does the 74AVC4T245QRGYRQ1 handle power sequencing between VCCA and VCCB?

The 74AVC4T245QRGYRQ1 incorporates VCC isolation: if either VCCA or VCCB drops to GND, both A and B ports automatically enter high-impedance state. This prevents back-current flow and ensures safe power-up/down sequencing in multi-rail automotive systems without external supervision circuitry.

Can the 74AVC4T245QRGYRQ1 translate between 1.2V and 3.3V rails?

Yes - the 74AVC4T245QRGYRQ1 fully supports 1.2V ↔ 3.3V bidirectional translation. Its VCCA and VCCB rails operate independently from 1.2V to 3.6V, and I/Os tolerate up to 4.6V, enabling safe interfacing with 3.3V peripherals even when powered from 1.2V supplies.

What is the maximum data rate supported by the 74AVC4T245QRGYRQ1?

The 74AVC4T245QRGYRQ1 achieves up to 380Mbps when translating from 1.8V to 3.3V. At other combinations - such as 1.2V→2.5V or 1.5V→3.3V - maximum rates are 150Mbps and 200Mbps respectively, as specified in the switching characteristics tables of the official datasheet SCES792D.

Is the thermal pad on the RGY package required to be grounded?

Yes - the exposed thermal pad on the 74AVC4T245QRGYRQ1's VQFN-16 (RGY) package must be electrically connected to PCB ground. This connection is mandatory for achieving the rated θ_JA of 68.8°C/W and preventing thermal throttling during sustained high-speed operation in enclosed automotive enclosures.

74AVC4T245QRGYRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AVC

Package/Case:: 16-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Translation Transceiver

Number of Elements:: 2

Number of Bits per Element:: 2

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 12mA, 12mA

Voltage - Supply:: 0.8V ~ 3.6V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 16-VQFN (4x3.5)

74AVC4T245QRGYRQ1 FAQ

1.How can I place an order for 74AVC4T245QRGYRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AVC4T245QRGYRQ1 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 74AVC4T245QRGYRQ1 reliable?

The price and inventory of 74AVC4T245QRGYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T245QRGYRQ1 is usually 5 days.

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74AVC4T245QRGYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AVC4T245QRGYRQ1 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 74AVC4T245QRGYRQ1?

For technical support, including 74AVC4T245QRGYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T245QRGYRQ1 requirements.

6.How does Aetrix verify that 74AVC4T245QRGYRQ1 is sourced from the original manufacturer or authorized distributors?

All 74AVC4T245QRGYRQ1 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 74AVC4T245QRGYRQ1 meets industry standards.

7.What is the process for return or replacement of 74AVC4T245QRGYRQ1?

All 74AVC4T245QRGYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T245QRGYRQ1, 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 74AVC4T245QRGYRQ1 part is unused and in its original packaging.

Return procedure for 74AVC4T245QRGYRQ1:

1.Submit a request within 90 days.

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

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