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Texas Instruments 74LV8T245QWRKSRQ1
- Part No.:
- 74LV8T245QWRKSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74LV8T245QWRKSRQ1.pdf
- Description:
- AUTOMOTIVE SINGLE-SUPPLY OCTAL-T
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74LV8T245QWRKSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal bus transceiver with 3-state outputs and bidirectional logic-level translation. It operates from 1.65 V to 5.5 V, supports up/down voltage translation (e.g., 1.2 V ↔ 1.8 V, 3.3 V ↔ 5.0 V), delivers ≤11 ns propagation delay at 5 V, and features 5.5 V-tolerant inputs. It is used in automotive infotainment domain controllers for interfacing mixed-voltage peripherals.
For engineers reviewing the 74LV8T245QWRKSRQ1 datasheet, 74LV8T245QWRKSRQ1 pinout, 74LV8T245QWRKSRQ1 application, or 74LV8T245QWRKSRQ1 equivalent, this page provides verified functional mode behavior, validated level-shifting ranges per supply voltage, confirmed thermal metrics for RKS package, and real-world timing performance across –40°C to +125°C.
Technical Context
The 74LV8T245QWRKSRQ1 implements dual-rail CMOS transceiver architecture with shared DIR and OE control logic. All eight bidirectional channels switch direction synchronously via DIR, while OE independently places all outputs into high-impedance state regardless of DIR state - enabling clean bus arbitration in multi-master systems.
Its LVxT input structure provides reduced VIH/VIL thresholds for up-translation and 5.5 V tolerance for down-translation. Output voltage levels are strictly referenced to VCC, not input rail, ensuring deterministic logic levels on both A and B sides under mixed-supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation across 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external biasing. |
| Propagation Delay (tPD) | ≤11 ns at 5 V, CL = 15 pF - enables reliable 150 Mbps data transfer in automotive serial buses like SENT or custom control links. |
| Input Voltage Tolerance | 5.5 V tolerant on all inputs - allows direct connection of 5 V signals to 1.8 V–3.3 V systems without external clamping or resistors. |
| Output Drive Strength | ±15 mA at 3.3 V/5 V - sufficient to drive 50 Ω transmission lines or multiple CMOS loads with controlled edge rates. |
| Operating Temperature | –40°C to +125°C (TA) - qualified per AEC-Q100 Grade 1 for under-hood and cockpit electronics. |
| ESD Rating | HBM ±4 kV, CDM ±2 kV - meets automotive robustness requirements for assembly and field operation. |
| Package | RKS (20-pin VQFN, 4.5 mm × 2.5 mm) with wettable flanks - supports automated optical inspection (AOI) and high-yield reflow in automotive PCB assembly. |
Pinout & Package
RKS package: 20-pin very-thin quad flat no-lead (VQFN), 4.50 mm × 2.50 mm body, 0.5 mm pitch, exposed thermal pad (connected to GND or left floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | L = B→A data flow; H = A→B data flow - synchronous control for all 8 channels; must be stable before OE activation. |
| OE (Pin 19) | Output enable (active low) | Drives all outputs to high-impedance when high; enables selected direction path when low - critical for bus contention avoidance. |
| VCC (Pin 20) | Positive supply | Reference for output logic levels and internal threshold generation; determines VOH/VOL and translation capability. |
| GND (Pin 10) | Ground reference | Return path for all I/O and supply currents; must be low-inductance connection to minimize ground bounce in fast switching. |
| A1–A8 (Pins 2–9) | Port A I/O terminals | Bidirectional data interface for side A; voltage levels referenced to local system rail - often connected to microcontroller GPIO banks. |
| B1–B8 (Pins 11–18) | Port B I/O terminals | Bidirectional data interface for side B; accepts 5.5 V-tolerant inputs and outputs VCC-referenced levels - commonly tied to sensors or legacy peripherals. |
| Thermal Pad | Thermal dissipation node | Exposed copper pad beneath package; improves thermal resistance (RθJB = 40.4°C/W); recommended to connect to GND plane for EMI and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C) with HBM ±4 kV / CDM ±2 kV - certified for safety-critical vehicle subsystems including ADAS and body control modules. |
| Bidirectional level translation | Supports simultaneous up-translation (1.2 V → 1.8 V, 1.8 V → 3.3 V) and down-translation (5.0 V → 3.3 V, 3.3 V → 1.8 V) without external components or direction-specific configuration. |
| Wettable flank QFN | RKS package includes solderable side walls - enables reliable AOI-based solder joint inspection in high-volume automotive SMT lines. |
| Low dynamic power | CPD = 16 pF per channel - reduces switching current and heat generation in always-on modules such as gateway ECUs operating at 3.3 V/25 MHz. |
| Robust 3-state control | OE and DIR pins fully decoupled - allows independent assertion of high-impedance state even during direction changes, preventing bus glitches. |
Applications
| Automotive Infotainment Interface | ADAS Sensor Hub Interconnect |
|---|---|
|
Use Scenario: Connecting a 3.3 V SoC application processor to legacy 5 V display timing controller and 1.8 V touch controller in a central display unit. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator - manages signal integrity across three voltage domains while enabling shared data bus arbitration. Use Value: Eliminates need for six discrete level shifters and simplifies PCB routing; supports hot-plug detection via OE-controlled tri-state during display initialization. |
Use Scenario: Aggregating radar, camera, and ultrasonic sensor data streams onto a 2.5 V domain MCU in a parking assist ECU. IC Role / Device Role / Timing Role: Octal parallel data bridge with direction control - routes time-synchronized sensor frames from 3.3 V radar ICs and 1.8 V camera ISPs to 2.5 V processing core. Use Value: Enables deterministic latency (<11 ns @ 2.5 V) for real-time sensor fusion; 5.5 V input tolerance prevents damage from ESD events on long harness traces. |
| Body Control Module Bus Extender | Electric Power Steering (EPS) Diagnostic Link |
|
Use Scenario: Extending LIN or CAN sub-bus communication between 5 V body module MCU and 1.8 V smart door latch ICs. IC Role / Device Role / Timing Role: Logic-level shifter and signal repeater - restores signal amplitude and slew rate degraded over 1+ meter wiring harnesses. Use Value: Maintains noise margin in electrically noisy cabin environments; AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime. |
Use Scenario: Isolating diagnostic UART signals between 3.3 V EPS motor controller and 5 V vehicle diagnostics port during firmware updates. IC Role / Device Role / Timing Role: Direction-controlled UART buffer with OE-gated tri-state - prevents back-driving during bootloader handshaking sequences. Use Value: Guarantees safe, glitch-free transition between normal operation and programming mode; wettable flank RKS package ensures zero-defect solder joints in safety-critical EPS assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245QRGYRQ1 | Lower VCC range (1.65 V–3.6 V); no 5.5 V input tolerance; 1.5× higher ICC at 3.3 V. | Restricted to 3.3 V-only systems; unsuitable for 5 V legacy peripheral interfacing. | Select when cost sensitivity outweighs mixed-voltage flexibility and automotive temperature range is non-critical. |
| NLSV8T244MUTAG | Unidirectional (A→B only); no DIR pin; supports 1.2 V–5.5 V translation but lacks B→A path. | Requires two devices for full bidirectional operation; increases board area and BOM count. | Choose only for fixed-direction data paths where space permits dual-device layout and OE coordination is simpler than DIR management. |
Compared with SN74LVC8T245QRGYRQ1 and NLSV8T244MUTAG, the 74LV8T245QWRKSRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 5.5 V input tolerance, and true bidirectional operation in a wettable-flank QFN - making it the only single-device solution for automotive domain controllers requiring mixed-voltage interoperability and zero-defect manufacturing compliance.
Availability
74LV8T245QWRKSRQ1 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, ADAS sensor hubs, and body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for 74LV8T245QWRKSRQ1 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 company focused on analog and embedded processing technologies, with leadership in automotive, industrial, and communications markets.
The SN74LV8T245-Q1 belongs to TI's LVxT logic family, engineered specifically for automotive-grade bidirectional level translation in mixed-voltage electronic control units - emphasizing robustness, signal integrity, and manufacturability in safety-critical systems.
FAQ
What voltage translation combinations are supported by the 74LV8T245QWRKSRQ1?
The 74LV8T245QWRKSRQ1 supports verified up-translation (e.g., 1.2 V → 1.8 V, 1.8 V → 3.3 V) and down-translation (e.g., 5.0 V → 3.3 V, 3.3 V → 1.8 V) depending on VCC setting. At 1.8 V VCC, it accepts 2.5 V/3.3 V/5.0 V inputs; at 5.0 V VCC, it accepts 2.5 V/3.3 V inputs. All combinations are validated per TI's SCLS908A datasheet Section 8.3.3.
Is the 74LV8T245QWRKSRQ1 pin-compatible with standard 74-series transceivers?
No - the 74LV8T245QWRKSRQ1 uses a proprietary 20-pin RKS (VQFN) footprint with wettable flanks and non-standard pin mapping (e.g., DIR on Pin 1, OE on Pin 19). It is not pin-compatible with legacy PDIP, SOIC, or TSSOP-packaged 74-series devices like the 74LS245 or 74HC245.
How does the DIR and OE logic interact in the 74LV8T245QWRKSRQ1?
In the 74LV8T245QWRKSRQ1, OE has priority: when OE = HIGH, all outputs go high-impedance regardless of DIR state. When OE = LOW, DIR selects direction - DIR = LOW enables B→A data flow; DIR = HIGH enables A→B data flow. This two-level control prevents bus contention during state transitions.
What is the maximum data rate achievable with the 74LV8T245QWRKSRQ1?
The 74LV8T245QWRKSRQ1 supports up to 150 Mbps under 5 V or 3.3 V VCC conditions, as confirmed by TI's switching characteristics tables (Section 6.9 and 6.8). This corresponds to ≤11 ns propagation delay (tPD) at 5 V with 15 pF load, enabling reliable operation in high-speed automotive serial links.
Does the 74LV8T245QWRKSRQ1 require external pull-up resistors on DIR or OE?
OE should be pulled up to VCC via a 10-kΩ resistor to ensure high-impedance state during power-up/power-down, as specified in TI's SCLS908A Section 8.1. DIR has no such requirement - it may be driven directly from a GPIO or tied high/low depending on fixed-direction needs. Unused inputs must be terminated to VCC or GND.
74LV8T245QWRKSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 1.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-VQFN (2.5x4.5)
74LV8T245QWRKSRQ1 FAQ
1.How can I place an order for 74LV8T245QWRKSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV8T245QWRKSRQ1 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 74LV8T245QWRKSRQ1 reliable?
The price and inventory of 74LV8T245QWRKSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV8T245QWRKSRQ1 is usually 5 days.
3.What payment methods are accepted for 74LV8T245QWRKSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV8T245QWRKSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV8T245QWRKSRQ1?
74LV8T245QWRKSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV8T245QWRKSRQ1 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 74LV8T245QWRKSRQ1?
For technical support, including 74LV8T245QWRKSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV8T245QWRKSRQ1 requirements.
6.How does Aetrix verify that 74LV8T245QWRKSRQ1 is sourced from the original manufacturer or authorized distributors?
All 74LV8T245QWRKSRQ1 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 74LV8T245QWRKSRQ1 meets industry standards.
7.What is the process for return or replacement of 74LV8T245QWRKSRQ1?
All 74LV8T245QWRKSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV8T245QWRKSRQ1, 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 74LV8T245QWRKSRQ1 part is unused and in its original packaging.
Return procedure for 74LV8T245QWRKSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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