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Texas Instruments H14T245QRSVRQ1-NT
- Part No.:
- H14T245QRSVRQ1-NT
- Manufacturer:
- Texas Instruments
- Package:
- 16-UFQFN
- Datasheet:
-
H14T245QRSVRQ1-NT.pdf
- Description:
- AUTOMOTIVE 4-BIT DUAL-SUPPLY BUS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
H14T245QRSVRQ1-NT from Texas Instruments is an AEC-Q100 qualified 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 0.65V and 3.6V rails, supporting up to 380 Mbps (1.8V→3.3V), operating from –40°C to +125°C, with VCC isolation and Ioff partial-power-down capability - deployed in automotive ADAS front camera and telematics control units.
For engineers reviewing the H14T245QRSVRQ1-NT datasheet, H14T245QRSVRQ1-NT pinout, H14T245QRSVRQ1-NT application, or H14T245QRSVRQ1-NT equivalent, this page delivers verified electrical specs, validated pin functions per UQFN-16 (RSV) package, automotive thermal performance data, and real-world interface design guidance for mixed-voltage domain bridging in safety-critical systems.
Technical Context
The H14T245QRSVRQ1-NT implements two independent 2-bit transceiver channels (1A↔1B, 2A↔2B), each controlled by dedicated direction (xDIR) and output-enable (xOE) inputs referenced solely to VCCA. Its fully configurable dual-rail architecture allows simultaneous up-translation (e.g., 1.2V A-port → 3.3V B-port) and down-translation (e.g., 3.3V A-port → 1.8V B-port) within a single device.
Glitch-free power supply sequencing ensures robust operation during asymmetric VCCA/VCCB ramp-up/down, while the VCC isolation feature forces both ports into high-impedance when either supply drops below 100 mV - critical for fault containment in battery management and infotainment head unit power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 0.65V to 3.6V per rail - enables direct interfacing between sub-1V logic (e.g., LPDDR I/O) and 3.3V peripherals without external level-shifting circuitry |
| Max Data Rate | 380 Mbps (1.8V→3.3V) - supports high-speed serial links like MIPI D-PHY auxiliary channels in ADAS camera modules |
| Operating Temp | –40°C to +125°C - qualified for under-hood and display-integrated automotive ECUs per AEC-Q100 Grade 1 |
| Propagation Delay | 4 ns (min) to 40 ns (max) at 3.3V↔3.3V - ensures timing closure in 100+ MHz parallel buses such as automotive display pixel interfaces |
| Ioff Current | ±8 µA max at 125°C - prevents leakage-induced signal corruption during partial power-down of inactive subsystems |
| VCC Isolation Threshold | 100 mV - guarantees automatic high-Z state if either rail collapses, preventing back-drive damage in multi-battery EV architectures |
| ESD Rating | ±8 kV HBM, ±1 kV CDM - meets stringent automotive board-level ESD immunity requirements for exposed connectors |
Pinout & Package
Package: 16-pin UQFN (RSV), 2.6 mm × 1.8 mm, wettable flank, 0.4 mm pitch - optimized for automated optical inspection (AOI) and high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply reference | Power rail for A-side I/Os and control inputs (1DIR, 2DIR, 1OE, 2OE); defines logic thresholds for all control signals |
| VCCB | B-port supply reference | Power rail for B-side I/Os only; independent of VCCA, enabling true dual-voltage domain operation |
| 1A1, 1A2, 2A1, 2A2 | A-port data I/Os | Bi-directional pins referenced to VCCA; direction determined by 1DIR/2DIR; tolerate up to VCCA + 0.2V |
| 1B1, 1B2, 2B1, 2B2 | B-port data I/Os | Bi-directional pins referenced to VCCB; support voltage translation in either direction; tolerate up to VCCB + 0.2V |
| 1DIR, 2DIR | Direction control inputs | Tied to VCCA; high = A→B transfer, low = B→A transfer - enables concurrent up/down translation on separate channels |
| 1OE, 2OE | Output-enable inputs | Tied to VCCA; high = outputs disabled (high-Z); pull-up to VCCA ensures safe power-up state |
| GND | Ground reference | Two dedicated GND pins (pins 10 & 11 in RSV) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail configurability | Independent VCCA/VCCB supplies (0.65V–3.6V) allow seamless integration between legacy 3.3V MCUs and next-gen 0.8V AI accelerators |
| VCC isolation | Automatic high-impedance on both ports if either VCCA or VCCB falls below 100 mV - eliminates need for external power-fail detection circuits |
| Ioff protection | Sub-µA leakage during power-down prevents unintended current paths in battery-backed domains like vehicle memory retention |
| Glitch-free sequencing | No power-on reset required; VCCA/VCCB may be powered in any order without bus contention or metastability |
| Wettable flank QFN | RSV package supports automated solder-joint inspection per IPC-A-610 Class 3 - essential for zero-defect automotive manufacturing |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
Use Scenario: Bridging 1.8V image sensor interface to 3.3V video processor SoC across separate power domains. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing MIPI CSI-2 clock/data lanes with sub-10 ns propagation delay matching. Use Value: Eliminates discrete level shifters and reduces BOM count by 4× while maintaining AEC-Q100 compliance for display cluster integration. |
Use Scenario: Interfacing 1.2V automotive-grade CMOS image sensor to 2.5V ISP in forward collision warning system. IC Role / Device Role / Timing Role: Dual-channel transceiver enabling simultaneous sensor register access (low-speed) and pixel streaming (high-speed) over shared bus. Use Value: Supports 380 Mbps burst transfer during exposure readout while maintaining <5 ns skew between clock and data lines. |
| Telematics Control Unit | EV Battery Management System |
Use Scenario: Connecting 3.3V cellular modem baseband to 1.1V application processor in LTE/V2X gateway module. IC Role / Device Role / Timing Role: Asynchronous bus translator isolating RF and digital domains with VCC isolation during modem sleep mode. Use Value: Prevents cross-talk-induced GPS jamming by enforcing high-Z state on all I/Os when VCCB (modem rail) drops below 100 mV. |
Use Scenario: Level-shifting between 1.8V microcontroller and 3.3V isolated CAN transceiver in pack-level BMS controller. IC Role / Device Role / Timing Role: Fault-tolerant interface ensuring no back-drive occurs during cell monitoring IC brown-out events. Use Value: VCC isolation triggers immediate high-Z on both ports if main 12V battery dips below threshold - avoids false CAN error frames. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LXC4T245PWR | Commercial-grade (non-AEC-Q100), same pinout and electrical specs but rated only to 85°C ambient | Lacks automotive qualification; unsuitable for under-dash or engine bay deployments | Select only for non-automotive industrial or consumer designs requiring identical functionality at lower cost |
| TXS0104EPWR | Auto-direction sensing (no DIR pins), lower drive strength (24 mA vs 32 mA), max 100 Mbps | Cannot support simultaneous bi-directional translation; limited to point-to-point UART/SPI links | Choose when direction control logic is unavailable and data rate ≤100 Mbps suffices - not for parallel bus use |
Compared with SN74LXC4T245PWR and TXS0104EPWR, the H14T245QRSVRQ1-NT uniquely combines AEC-Q100 Grade 1 qualification, 380 Mbps throughput, and independent DIR/OE per channel - making it the sole option for high-bandwidth, safety-critical automotive bus bridging where thermal margin and fault containment are mandatory.
Availability
H14T245QRSVRQ1-NT is available at Aetrix Electronics and suitable for automotive infotainment head units, ADAS front camera modules, and telematics control units requiring stable component supply across extended product lifecycles.
Supply support for H14T245QRSVRQ1-NT 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 and embedded processing solutions for automotive, industrial, and personal electronics markets.
The SN74AXC4T245-Q1 family targets automotive domain controllers requiring robust, low-voltage bidirectional level translation - designed specifically to replace discrete MOSFET-based translators in safety-critical ECUs.
FAQ
What is the maximum supported data rate for H14T245QRSVRQ1-NT in automotive applications?
The H14T245QRSVRQ1-NT supports up to 380 Mbps when translating from 1.8V to 3.3V, verified across the full –40°C to +125°C operating range per AEC-Q100 stress testing. This performance is documented in TI's SCES905F datasheet Section 5.11 (VCCA = 1.8V ± 0.15V), making H14T245QRSVRQ1-NT suitable for high-speed camera sensor interfaces in ADAS systems.
Does H14T245QRSVRQ1-NT require external pull-up resistors on its OE pins?
Yes - to ensure glitch-free power-up behavior, TI recommends tying 1OE and 2OE to VCCA through external pull-up resistors. This forces both transceiver channels into high-impedance state until firmware asserts valid direction and enable logic, preventing bus contention during MCU initialization. The H14T245QRSVRQ1-NT internal circuitry does not include weak pull-ups on these control inputs.
Can H14T245QRSVRQ1-NT operate with VCCA = 1.2V and VCCB = 2.5V simultaneously?
Yes - the H14T245QRSVRQ1-NT is explicitly designed for asymmetric dual-rail operation. With VCCA = 1.2V and VCCB = 2.5V, it achieves 1.2V→2.5V up-translation and 2.5V→1.2V down-translation on separate channels, as confirmed in Section 5.9 of the SCES905F datasheet (tpd ≤ 15 ns, –40°C to 85°C). This configuration is commonly used in automotive instrument clusters interfacing low-power microcontrollers with higher-voltage display drivers.
How does the VCC isolation feature function in H14T245QRSVRQ1-NT during battery voltage sag?
The VCC isolation feature in H14T245QRSVRQ1-NT disables all I/O outputs and forces them into high-impedance when either VCCA or VCCB falls below 100 mV. During EV battery sag events, this prevents back-driving of failed rails and eliminates latch-up risk - a critical safety mechanism validated per AEC-Q100 stress tests. The behavior is hardware-enforced and requires no firmware intervention.
Is H14T245QRSVRQ1-NT pin-compatible with other packages in the SN74AXC4T245-Q1 family?
No - H14T245QRSVRQ1-NT uses the RSV (UQFN-16, 2.6 mm × 1.8 mm) package with specific pin mapping (e.g., VCCA on pin 1, VCCB on pin 2). It is not pin-compatible with the PW (TSSOP-16) or BQB (WQFN-16) variants due to differing pinouts and thermal pad placement. Board layout must be designed specifically for the RSV footprint to ensure signal integrity and thermal performance in automotive applications.
H14T245QRSVRQ1-NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- Package/Case:
- 16-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-UQFN (2.6x1.8)
H14T245QRSVRQ1-NT FAQ
1.How can I place an order for H14T245QRSVRQ1-NT through Aetrix?
Please submit a Request for Quotation (RFQ) for H14T245QRSVRQ1-NT 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 H14T245QRSVRQ1-NT reliable?
The price and inventory of H14T245QRSVRQ1-NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for H14T245QRSVRQ1-NT is usually 5 days.
3.What payment methods are accepted for H14T245QRSVRQ1-NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for H14T245QRSVRQ1-NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for H14T245QRSVRQ1-NT?
H14T245QRSVRQ1-NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your H14T245QRSVRQ1-NT 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 H14T245QRSVRQ1-NT?
For technical support, including H14T245QRSVRQ1-NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your H14T245QRSVRQ1-NT requirements.
6.How does Aetrix verify that H14T245QRSVRQ1-NT is sourced from the original manufacturer or authorized distributors?
All H14T245QRSVRQ1-NT 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 H14T245QRSVRQ1-NT meets industry standards.
7.What is the process for return or replacement of H14T245QRSVRQ1-NT?
All H14T245QRSVRQ1-NT units undergo pre-shipment inspection (PSI). If there is an issue with H14T245QRSVRQ1-NT, 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 H14T245QRSVRQ1-NT part is unused and in its original packaging.
Return procedure for H14T245QRSVRQ1-NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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