My Inquiry
My Account
Texas Instruments 74AVC4T245QPWRQ1
- Part No.:
- 74AVC4T245QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVC4T245QPWRQ1.pdf
- Description:
- AUTOMOTIVE FOUR-BIT DUAL-SUPPLY
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AVC4T245QPWRQ1 from Texas Instruments is an automotive-qualified 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V domains, with 4.6V I/O tolerance, Ioff partial-power-down support, and up to 380Mbps data rate (1.8V→3.3V). It serves as a level-shifting interface in telematics and instrument cluster interconnects.
For engineers reviewing the 74AVC4T245QPWRQ1 datasheet, 74AVC4T245QPWRQ1 pinout, 74AVC4T245QPWRQ1 application, or 74AVC4T245QPWRQ1 equivalent, key selection criteria include dual-rail configurability (VCCA/VCCB = 1.2V–3.6V), AEC-Q100 Grade 1 qualification (–40°C to 125°C), 3-state output control per channel, and VCCA-referenced DIR/OE logic.
Technical Context
The device implements two independent 2-bit bidirectional translation channels, each with dedicated DIR and OE inputs referenced to VCCA. Directional data flow (A↔B) is controlled asynchronously per channel without internal clocking or state retention.
Its dual-rail architecture isolates A-port I/Os (VCCA-referenced) from B-port I/Os (VCCB-referenced), enabling simultaneous operation across mismatched supply domains. VCC isolation forces both ports into high-impedance if either VCCA or VCCB = GND, preventing backfeed during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V independently - enables translation among 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed serial interconnects in automotive infotainment |
| I/O Tolerance | 4.6V - allows safe interfacing with higher-voltage peripherals without external clamping |
| 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 electronics |
| Ioff Current | ±5 μA max at –40°C to +125°C - prevents damaging back-current during partial power-down |
| Propagation Delay | 2.6 ns typical (A→B, VCCA=3.3V/VCCB=3.3V) - ensures timing-critical signal integrity in real-time systems |
Pinout & Package
Packaged in a 16-pin TSSOP (PW), the 74AVC4T245QPWRQ1 features exposed leads for thermal management and compact board footprint (5mm × 6.4mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 2-bit channel) | Referenced to VCCA; high = A→B, low = B→A; enables asymmetric bidirectional routing |
| 1OE, 2OE | Output-enable input (per 2-bit channel) | Referenced to VCCA; high = 3-state, low = active drive; allows independent channel gating |
| 1A1–2A2 | A-port I/O (VCCA-referenced) | 4-bit data path tied to VCCA domain; accepts 1.2V–3.6V logic levels |
| 1B1–2B2 | B-port I/O (VCCB-referenced) | 4-bit data path tied to VCCB domain; accepts 1.2V–3.6V logic levels |
| VCCA, VCCB | Independent supply rails | Decoupled power inputs enable true dual-voltage operation without shared rail constraints |
| GND (pins 8,9) | Ground reference | Dual ground pins reduce impedance and improve noise immunity in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dual-rail translation | Independent VCCA/VCCB from 1.2V to 3.6V - eliminates need for external level shifters in mixed-voltage SoC-to-peripheral links |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ±8 kV and CDM ±1 kV - suitable for safety-critical automotive ECUs |
| VCC isolation | Both ports enter high-Z if either VCCA or VCCB = GND - prevents latch-up during hot-plug or power sequencing faults |
| Ioff protection | Active Ioff circuitry disables outputs during partial power-down - avoids current backflow into powered-down subsystems |
| 4.6V-tolerant I/Os | Withstands overvoltage on A/B ports up to 4.6V regardless of VCCA/VCCB - simplifies interface to legacy 5V peripherals |
Applications
| Telematics Control Unit | Instrument Cluster Display Interface |
|---|---|
|
Use Scenario: Interfacing a 1.8V microcontroller to a 3.3V CAN transceiver and GPS module in a vehicle telematics gateway. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing asynchronous data flow between MCU UART/SPI and peripheral ICs across mismatched supply domains. Use Value: Enables direct connection without discrete resistive dividers or active translators, reducing BOM count and PCB area while maintaining 380Mbps throughput. |
Use Scenario: Connecting a 2.5V graphics controller to a 1.2V display driver IC in a digital instrument cluster with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Low-latency, rail-isolated level shifter ensuring glitch-free pixel data transfer under rapid power-state transitions. Use Value: Delivers sub-3ns propagation delay and Ioff-enabled safe power sequencing - critical for zero-display-blackout startup and fail-safe shutdown. |
| Infotainment Head Unit | Automotive Navigation System |
|
Use Scenario: Bridging a 3.3V audio codec and a 1.5V application processor in a head unit supporting Bluetooth and voice recognition. IC Role / Device Role / Timing Role: Dual-channel configurable translator handling simultaneous I²S and GPIO-level shifting with independent OE control. Use Value: Supports concurrent bidirectional audio data and control signaling with <5 ns channel-to-channel skew - preserves audio sample alignment. |
Use Scenario: Linking a 1.2V GNSS baseband processor to a 2.5V RF front-end and memory subsystem in a navigation ECU. IC Role / Device Role / Timing Role: Robust, AEC-Q100-compliant interface IC providing voltage translation and ESD-hardened signal integrity in harsh RF environments. Use Value: Integrates ±8 kV HBM ESD protection and 4.6V I/O tolerance - eliminates need for external TVS diodes on high-density navigation module PCBs. |
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 @ 1.8V→3.3V); LVC family, not AVC - higher propagation delay, lower drive strength | Suitable for cost-sensitive, lower-speed automotive modules where 380Mbps is unnecessary | Select when system timing budget allows >4 ns delay and peak bandwidth ≤240Mbps |
| TXS4T245PWR | No automotive qualification; no AEC-Q100 rating; auto-direction sensing (no DIR pin); lower ESD (HBM ±4 kV) | Targeted for consumer-grade portable electronics, not safety-critical automotive use | Use only in non-automotive designs requiring automatic direction detection and relaxed qualification |
Compared with SN74LVC4T245QPWRQ1 and TXS4T245PWR, the 74AVC4T245QPWRQ1 uniquely delivers AEC-Q100 Grade 1 compliance, 380Mbps performance, and explicit DIR/OE control - making it the sole choice for timing-critical, safety-qualified automotive data bridges.
Availability
74AVC4T245QPWRQ1 is available at Aetrix Electronics and suitable for telematics gateways, instrument clusters, and infotainment head units requiring stable component supply, long-term automotive lifecycle support, and traceable AEC-Q100-compliant sourcing.
Supply support for 74AVC4T245QPWRQ1 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 specializing in analog, embedded processing, and automotive ICs, with decades of experience delivering high-reliability components for mission-critical systems.
The SN74AVC4T245-Q1 belongs to TI's automotive-qualified AVC logic family, engineered specifically for robust, low-voltage bidirectional translation in next-generation vehicle networking and human-machine interface subsystems.
FAQ
What is the maximum allowable voltage on the A-port or B-port I/O pins of the 74AVC4T245QPWRQ1?
The 74AVC4T245QPWRQ1 supports 4.6V tolerance on all A-port and B-port I/O pins, regardless of VCCA or VCCB supply voltage. This allows safe interfacing with peripherals operating up to 4.6V without external clamping circuitry, and is explicitly specified in the Absolute Maximum Ratings table of the SCES792D datasheet.
Does the 74AVC4T245QPWRQ1 support partial power-down operation, and how is it implemented?
Yes, the 74AVC4T245QPWRQ1 implements Ioff circuitry that actively disables output drivers when either VCCA or VCCB is at 0V, preventing damaging back-current flow. This feature is validated per JESD78 Class II latch-up testing and is guaranteed over –40°C to +125°C, with Ioff ≤ ±5 μA at temperature extremes.
How does the 74AVC4T245QPWRQ1 handle power sequencing when VCCA and VCCB are ramped at different rates?
The 74AVC4T245QPWRQ1 incorporates VCC isolation logic: if either VCCA or VCCB falls to GND, both A-port and B-port outputs automatically enter high-impedance state. This eliminates bus contention and backfeed risk during asymmetric power-up/down sequences common in automotive domain controllers.
What are the recommended pull-up resistor values for OE pins on the 74AVC4T245QPWRQ1 during power-up?
To ensure high-impedance state at power-up, tie 1OE and 2OE to VCCA via pull-up resistors. The minimum value is determined by the current-sinking capability of the driving source; TI recommends ≥10 kΩ for standard CMOS drivers, verified in Section 3 of the SCES792D datasheet for reliable high-Z assertion before VCCA stabilizes.
Is the 74AVC4T245QPWRQ1 pin-compatible with other members of the SN74AVC4T245-Q1 family, such as RGY or BQB package variants?
Yes - all SN74AVC4T245-Q1 variants (RGY/VQFN, PW/TSSOP, BQB/WQFN, DYY/SOT) share identical pin numbering, signal assignment, and electrical functionality. The 74AVC4T245QPWRQ1 (PW package) is functionally and pinout-compatible with SN74AVC4T245QRGYRQ1 and SN74AVC4T245QBQBRQ1, differing only in mechanical form factor and thermal characteristics.
74AVC4T245QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.2 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State
- Data Rate:
- 380Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP (0.173", 4.40mm Width)
74AVC4T245QPWRQ1 FAQ
1.How can I place an order for 74AVC4T245QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC4T245QPWRQ1 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 74AVC4T245QPWRQ1 reliable?
The price and inventory of 74AVC4T245QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T245QPWRQ1 is usually 5 days.
3.What payment methods are accepted for 74AVC4T245QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC4T245QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVC4T245QPWRQ1?
74AVC4T245QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC4T245QPWRQ1 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 74AVC4T245QPWRQ1?
For technical support, including 74AVC4T245QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T245QPWRQ1 requirements.
6.How does Aetrix verify that 74AVC4T245QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All 74AVC4T245QPWRQ1 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 74AVC4T245QPWRQ1 meets industry standards.
7.What is the process for return or replacement of 74AVC4T245QPWRQ1?
All 74AVC4T245QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T245QPWRQ1, 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 74AVC4T245QPWRQ1 part is unused and in its original packaging.
Return procedure for 74AVC4T245QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AVC4T245QPWRQ1 Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
