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Texas Instruments SN74AXC8T245QPWRQ1
- Part No.:
- SN74AXC8T245QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AXC8T245QPWRQ1.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,166
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Product details
Overview
SN74AXC8T245QPWRQ1 from Texas Instruments is an AEC-Q100 qualified 8-bit dual-supply bus transceiver enabling bidirectional voltage translation between 0.65V–3.6V rails on A and B ports, supporting up to 380Mbps (1.8V→3.3V), with dual direction-control pins (DIR1/DIR2), VCC isolation, and partial power-down mode for automotive infotainment and ADAS systems.
For engineers reviewing the SN74AXC8T245QPWRQ1 datasheet, SN74AXC8T245QPWRQ1 pinout, SN74AXC8T245QPWRQ1 application, or SN74AXC8T245QPWRQ1 equivalent, key selection criteria include dual-rail operating range (0.65V–3.6V per port), –40°C to +125°C temperature rating, wettable flank QFN package compatibility, Ioff-enabled backflow protection, and simultaneous up/down translation capability in safety-critical vehicle subsystems.
Technical Context
This device implements a fully configurable dual-rail architecture where A-port I/Os (A1–A8) track VCCA and B-port I/Os (B1–B8) track VCCB-both independently adjustable from 0.65V to 3.6V. Control inputs DIR1, DIR2, and OE are referenced solely to VCCA.
The VCC isolation feature disables all outputs when either VCCA or VCCB falls below 100mV, placing I/Os in high-impedance state. The Ioff circuitry actively limits current backflow during partial power-down, meeting JESD78 Class II latch-up requirements (>100mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 0.65V to 3.6V per rail-enables interface between sub-1V logic (e.g., 0.8V AI accelerators) and 3.3V legacy peripherals |
| Operating Temperature | –40°C to +125°C-qualified for under-hood and cockpit-mounted automotive ECUs |
| Max Data Rate | 380Mbps at 1.8V→3.3V translation-supports high-speed sensor data aggregation in ADAS camera links |
| Propagation Delay | As low as 4ns (VCCA=2.5V, VCCB=3.3V)-ensures timing integrity in real-time control loops |
| Ioff Current | ±12µA max at 125°C-prevents damaging back-current when one supply is powered off |
| ESD Rating | ±8kV HBM, ±1kV CDM-meets AEC-Q100 stress requirements for production automotive PCBs |
| Supply Current (ICC) | 60µA max combined (VCCA+VCCB)-minimizes quiescent power in always-on domains |
Pinout & Package
PW package: 24-pin TSSOP, 7.8mm × 6.4mm; also available in RHL/WRGY 24-pin VQFN (5.5mm × 3.5mm) with wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply reference | Supplies A-side I/Os and references DIR1, DIR2, OE; must be ≥0.65V for functional operation |
| VCCB | B-port supply reference | Supplies B-side I/Os only; independent of VCCA-enables asymmetric voltage translation |
| A1–A8 | Bi-directional data I/O (A side) | Track VCCA; tolerate input voltages up to VCCA + 0.2V in active state |
| B1–B8 | Bi-directional data I/O (B side) | Track VCCB; tolerate input voltages up to VCCB + 0.2V in active state |
| DIR1 / DIR2 | Independent direction control | Both referenced to VCCA; enable simultaneous A→B and B→A traffic without bus contention |
| OE | Output enable (active-low) | Pull to GND to enable; pull to VCCA for high-Z-supports hot-swap and power sequencing |
| GND (×2) | Ground return | Dual ground pins reduce impedance and improve noise immunity in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | Enables mixed-voltage SoC-to-peripheral bridging (e.g., 0.8V GPU core ↔ 2.5V image signal processor) |
| VCC isolation | Automatically forces all I/Os into high-Z when either VCCA or VCCB drops below 100mV-prevents bus corruption during brown-out |
| Partial power-down (Ioff) | Blocks >99.9% of backflow current when one rail is unpowered-eliminates need for external isolation switches |
| Wettable flank QFN option | Supports AOI-based solder joint inspection for zero-defect automotive manufacturing compliance |
| AEC-Q100 Grade 1 | Qualified for full automotive temperature range (–40°C to +125°C ambient) with lifetime reliability validation |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
Use Scenario: Interfacing low-voltage display controller (0.8V) with 3.3V LVDS serializer in digital dashboard. IC Role / Device Role / Timing Role: Voltage-translating bus transceiver managing bidirectional command/status exchange and pixel clock domain crossing. Use Value: Eliminates level-shifter discrete count while maintaining <10ns propagation skew across 8 data lanes for synchronized UI rendering. | Use Scenario: Bridging 1.2V MIPI CSI-2 image sensor output to 2.5V ISP input in front-facing driver-assist camera. IC Role / Device Role / Timing Role: Asynchronous bidirectional translator enabling simultaneous sensor register access (A→B) and frame data streaming (B→A). Use Value: Supports 380Mbps burst transfer without added jitter or setup/hold violations due to deterministic 4ns tpd at 1.2V→2.5V. |
| ADAS Fusion ECU | HEV Battery Management System |
Use Scenario: Aggregating time-synchronized radar (1.8V), lidar (0.9V), and ultrasonic (3.3V) sensor data into a 2.5V fusion processor. IC Role / Device Role / Timing Role: Multi-rail translator with DIR1/DIR2 enabling concurrent read/write across heterogeneous sensor buses. Use Value: Reduces interposer complexity by consolidating three voltage domains into single-package 8-bit channels with guaranteed 125°C operation. | Use Scenario: Isolating 3.3V microcontroller I²C bus from 1.8V cell monitor ICs in high-voltage battery pack monitoring module. IC Role / Device Role / Timing Role: I²C-compatible bidirectional translator with VCC isolation preventing fault propagation during cell overvoltage events. Use Value: Maintains communication integrity during transient faults via automatic high-Z fail-safe behavior when VCCB collapses below 100mV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245QPWRQ1 | Lower VCC min (0.8V vs. 0.65V); no VCC isolation; max 200Mbps | Lacks support for sub-0.8V logic nodes and failsafe isolation during rail collapse | Acceptable only if system operates strictly above 0.8V and does not require fault-isolation behavior |
| TXB0108PWR | Auto-direction sensing (no DIR pins); 32mA drive; no AEC-Q100 qualification | Unsuitable for safety-critical automotive use; limited to commercial temp range (–40°C to 85°C) | Only viable for non-automotive industrial prototypes requiring auto-bidirectional operation |
Compared with SN74AVC8T245QPWRQ1 and TXB0108PWR, the SN74AXC8T245QPWRQ1 uniquely delivers sub-0.8V compatibility, VCC isolation, and AEC-Q100 Grade 1 certification-making it the sole choice for next-gen automotive SoCs interfacing ultra-low-voltage AI accelerators with legacy peripherals.
Availability
SN74AXC8T245QPWRQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS fusion ECUs, and HEV battery management systems requiring stable component supply across extended automotive lifecycles.
Supply support for SN74AXC8T245QPWRQ1 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 ISO/TS 16949-certified manufacturing.
The SN74AXC8T245QPWRQ1 belongs to TI's AXC family of advanced voltage translators-designed specifically for automotive-grade interoperability between emerging sub-1V logic nodes and established 1.8V/2.5V/3.3V interfaces.
FAQ
What is the minimum operating voltage for SN74AXC8T245QPWRQ1 on each supply rail?
The SN74AXC8T245QPWRQ1 supports VCCA and VCCB down to 0.65V independently. This enables direct interfacing with ultra-low-power 0.7V/0.8V AI inference accelerators and memory subsystems while maintaining full functionality-including direction control and output enable-without external biasing or level-shifting circuitry.
Does SN74AXC8T245QPWRQ1 support simultaneous bidirectional data flow?
Yes, the SN74AXC8T245QPWRQ1 features two independent direction-control inputs (DIR1 and DIR2), allowing concurrent A→B and B→A data transfers on separate channel subsets. This eliminates bus arbitration overhead in multi-sensor ADAS fusion architectures where radar and camera data streams must be aggregated without latency penalties.
How does the VCC isolation feature behave during power sequencing in SN74AXC8T245QPWRQ1?
When either VCCA or VCCB drops below 100mV, the SN74AXC8T245QPWRQ1 automatically places all A- and B-port I/Os into high-impedance state-regardless of OE or DIR states. This prevents back-driving, bus contention, or latch-up during asymmetric power-up/down sequences common in modular automotive ECUs with staggered rail activation.
Is SN74AXC8T245QPWRQ1 compatible with I²C or SPI protocols?
The SN74AXC8T245QPWRQ1 is protocol-agnostic and supports I²C and SPI signal translation when configured with appropriate pull-up resistors and timing margins. Its 4ns propagation delay at 2.5V→3.3V and ±12µA Ioff current ensure reliable operation in 400kHz I²C and 25MHz SPI implementations within automotive temperature ranges.
What package variants are offered for SN74AXC8T245QPWRQ1, and which supports automated optical inspection?
The SN74AXC8T245QPWRQ1 is offered in PW (24-pin TSSOP), RHL (24-pin VQFN), and WRGY (24-pin wettable flank VQFN) packages. Only the WRGY variant provides solderable, inspectable flanks-enabling 100% automated optical inspection (AOI) of solder joints per IPC-A-610 Class 3 requirements for automotive safety-critical assemblies.
SN74AXC8T245QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- Tri-State, Non-Inverted
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 0.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
SN74AXC8T245QPWRQ1 FAQ
1.How can I place an order for SN74AXC8T245QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AXC8T245QPWRQ1 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 SN74AXC8T245QPWRQ1 reliable?
The price and inventory of SN74AXC8T245QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AXC8T245QPWRQ1 is usually 5 days.
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Once your SN74AXC8T245QPWRQ1 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 SN74AXC8T245QPWRQ1?
For technical support, including SN74AXC8T245QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AXC8T245QPWRQ1 requirements.
6.How does Aetrix verify that SN74AXC8T245QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AXC8T245QPWRQ1 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 SN74AXC8T245QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AXC8T245QPWRQ1?
All SN74AXC8T245QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AXC8T245QPWRQ1, 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 SN74AXC8T245QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74AXC8T245QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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