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Texas Instruments SN74LV8T245QPWRQ1
- Part No.:
- SN74LV8T245QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV8T245QPWRQ1.pdf
- Description:
- SN74LV8T245QPWRQ1
- Quantity:
- Payment:
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Product details
Overview
SN74LV8T245QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal bus transceiver with 3-state outputs and integrated logic-level translation. It operates from 1.65 V to 5.5 V, supports bidirectional 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 - used in automotive infotainment domain controllers for interfacing mixed-voltage peripherals.
For engineers reviewing the SN74LV8T245QPWRQ1 datasheet, SN74LV8T245QPWRQ1 pinout, SN74LV8T245QPWRQ1 application, or SN74LV8T245QPWRQ1 equivalent, key selection criteria include its automotive qualification (–40°C to +125°C), wettable-flank TSSOP-20 package compatibility with AOI, 3-state output control via DIR/OE, and verified level-shifting performance across 1.8/2.5/3.3/5 V CMOS domains.
Technical Context
The device implements dual-rail bidirectional translation using shared DIR and OE control logic: DIR selects data flow direction (A→B or B→A), while OE globally enables/disables all eight channels into high-impedance state. Its LVxT input structure provides reduced VIH/VIL thresholds for reliable up-translation and 5.5 V tolerance for down-translation without external components.
Each channel uses balanced CMOS 3-state drivers capable of ±15 mA output current at 3.3–5 V, with propagation delays ranging from 4.5 ns (5 V, CL = 15 pF) to 25.1 ns (1.8 V, CL = 15 pF). Latch-up immunity exceeds 250 mA per JESD17, and thermal resistance (RθJA) is 122.3°C/W in the PW (TSSOP-20) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage 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 regulators |
| Propagation Delay (tPD) | 4.5 ns (min) at 5 V, CL = 15 pF - enables >150 Mbps signal integrity in high-speed automotive serial links |
| Input Voltage Tolerance | 5.5 V - allows direct connection of 5 V signals to lower-VCC systems (e.g., 3.3 V MCU) without clamping diodes or resistors |
| Output Drive Strength | ±15 mA at 3.3–5 V - sufficient to drive 50 Ω transmission lines or multiple CMOS loads with controlled edge rates |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for engine bay, ADAS sensor hubs, and body control modules |
| ESD Rating | HBM ±4 kV, CDM ±2 kV - meets AEC-Q100 stress requirements for automotive assembly and field operation |
| Power Dissipation Cap | CPD = 16 pF - determines dynamic power as PD = VCC² × f × (CPD + CL), critical for thermal design in sealed enclosures |
Pinout & Package
SN74LV8T245QPWRQ1 is packaged in a 20-pin TSSOP (PW) with 6.50 mm × 4.40 mm body size, wettable flanks for automated optical inspection (AOI), and thermal pad connected to GND or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | Low = B→A data flow; High = A→B - enables bidirectional bus arbitration with single control line |
| OE (Pin 19) | Output enable (active low) | Pull-up to VCC ensures high-impedance during power-up; disables all eight channels simultaneously |
| VCC (Pin 20) | Positive supply | Reference for output voltage levels and input thresholds - sets translation target (e.g., 3.3 V out when VCC = 3.3 V) |
| GND (Pin 10) | Ground reference | Common return path for all I/O and supply currents; required for stable threshold referencing |
| A1–A8 (Pins 2–9) | Port A I/O channels | Eight bidirectional data lines tied to one voltage domain (e.g., 1.8 V MCU side) |
| B1–B8 (Pins 11–18) | Port B I/O channels | Eight bidirectional data lines tied to second voltage domain (e.g., 5 V sensor interface) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, including HBM/CDM ESD stress testing |
| Single-supply bidirectional level shifting | Eliminates need for dual supplies or discrete MOSFET translators in mixed-voltage automotive buses |
| Wettable flank TSSOP package | Enables reliable solder-joint inspection via AOI - critical for zero-defect manufacturing in Tier 1 production |
| 5.5 V tolerant inputs | Accepts legacy 5 V signals directly into 1.8/2.5/3.3 V systems without external protection circuitry |
| LVxT enhanced input thresholds | Supports up-translation (e.g., 1.2 V → 1.8 V) with guaranteed VIH/VIL margins across all VCC operating points |
Applications
| Automotive Infotainment Interface | ADAS Sensor Hub Interconnect |
|---|---|
Use Scenario: Connecting a 1.8 V SoC processor to a 5 V display timing controller in a head-unit system. IC Role / Device Role / Timing Role: Bidirectional level shifter and bus isolator between voltage domains, controlled by SoC GPIOs. Use Value: Enables direct interface without external voltage translators or level-shifting buffers, reducing BOM count and PCB area. | Use Scenario: Isolating CAN FD transceiver I/O from a 3.3 V microcontroller during reset sequencing in a radar ECU. IC Role / Device Role / Timing Role: 3-state bus transceiver providing glitch-free signal hold and domain isolation during controller initialization. Use Value: Prevents spurious CAN bus activity during boot; OE-controlled high-Z state eliminates contention on shared lines. |
| Body Control Module (BCM) Gateway | Electric Power Steering (EPS) Subsystem |
Use Scenario: Translating LIN bus signals between a 5 V legacy actuator and a 2.5 V gateway MCU in a door module. IC Role / Device Role / Timing Role: Unidirectional level translator (5 V → 2.5 V) with configurable direction and output disable. Use Value: Maintains signal integrity over 1–2 m harness runs while meeting LIN physical layer timing specs (≤25 µs rise/fall). | Use Scenario: Interfacing a 3.3 V torque sensor ADC to a 5 V motor driver ASIC in an EPS control unit. IC Role / Device Role / Timing Role: Up-translator (3.3 V → 5 V) with fast propagation (<10 ns at 5 V) to preserve real-time torque feedback latency. Use Value: Achieves sub-100 ns end-to-end signal path delay, supporting 10 kHz closed-loop motor control bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245QPWRQ1 | Narrower VCC range (1.65–3.6 V); no 5 V tolerance; lower max speed (100 Mbps) | Suitable only for 1.8/2.5/3.3 V-only systems; not usable where 5 V inputs exist | Select when cost sensitivity outweighs 5 V tolerance need and full 5.5 V operation is unnecessary |
| TXS0108EPWR | Auto-direction sensing (no DIR pin); higher ICC (up to 80 µA); no AEC-Q100 qualification | Requires no direction control logic but lacks automotive temperature rating and fails AEC-Q100 stress tests | Use in non-automotive industrial or consumer designs where auto-bidirectional operation simplifies firmware |
Compared with SN74LVC8T245QPWRQ1 and TXS0108EPWR, SN74LV8T245QPWRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 5.5 V input tolerance, and 150 Mbps capability in a wettable-flank TSSOP - making it the only drop-in solution for safety-critical automotive mixed-voltage interconnects requiring production traceability and thermal reliability.
Availability
SN74LV8T245QPWRQ1 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, ADAS sensor hub interconnects, and body control module gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV8T245QPWRQ1 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 automotive qualification expertise and ISO/TS 16949-compliant manufacturing.
SN74LV8T245QPWRQ1 belongs to TI's LVxT logic family, engineered specifically for robust voltage-level translation in automotive ECUs where mixed-supply domain interoperability, AEC-Q100 compliance, and AOI-compatible packaging are mandatory.
FAQ
What is the maximum data rate supported by SN74LV8T245QPWRQ1?
SN74LV8T245QPWRQ1 supports up to 150 Mbps with 5 V or 3.3 V VCC, validated by switching characteristics showing tPD ≤ 5.3 ns (5 V, CL = 50 pF) and tPD ≤ 8.8 ns (3.3 V, CL = 50 pF). This enables reliable use in high-speed automotive serial buses such as SENT, PSI5, and proprietary sensor interfaces where timing margins are tight.
Does SN74LV8T245QPWRQ1 require external pull-up resistors on DIR or OE pins?
OE should be pulled up to VCC via a 10-kΩ resistor to ensure high-impedance state during power-up; DIR has no internal pull-up and must be actively driven by the host controller. SN74LV8T245QPWRQ1 does not integrate pull-ups on either control pin, so external biasing is required for fail-safe reset behavior in automotive systems.
Can SN74LV8T245QPWRQ1 translate 1.2 V signals to 3.3 V outputs?
Yes - SN74LV8T245QPWRQ1 supports 1.2 V to 1.8 V up-translation per its LVxT input structure, but 1.2 V → 3.3 V is not specified. Valid up-translation paths are 1.2 V → 1.8 V (VCC = 1.8 V), 1.8 V → 3.3 V (VCC = 3.3 V), and 2.5 V → 5.0 V (VCC = 5.0 V). For 1.2 V → 3.3 V, two-stage translation or alternate devices are required.
Is the thermal pad on SN74LV8T245QPWRQ1 (TSSOP-20) required to be connected?
No - the thermal pad on SN74LV8T245QPWRQ1 in the PW (TSSOP-20) package is not present; only the RKS (VQFN) variant includes a thermal pad. The TSSOP-20 package relies on lead-frame conduction, and its RθJA is specified at 122.3°C/W with standard JEDEC PCB mounting conditions.
How does SN74LV8T245QPWRQ1 handle unused input pins?
All unused inputs of SN74LV8T245QPWRQ1 must be held at VCC or GND to prevent floating states that cause excessive ICC and potential oscillation. TI recommends 10-kΩ pull-up/pull-down resistors for unconnected A/B channel pins, DIR, or OE - especially critical in automotive environments where EMI and temperature extremes increase susceptibility to noise-induced malfunction.
SN74LV8T245QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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
- Supplier Device Package:
- 20-TSSOP
SN74LV8T245QPWRQ1 FAQ
1.How can I place an order for SN74LV8T245QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV8T245QPWRQ1 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 SN74LV8T245QPWRQ1 reliable?
The price and inventory of SN74LV8T245QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV8T245QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LV8T245QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV8T245QPWRQ1 transactions.
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4.How is shipping managed for SN74LV8T245QPWRQ1?
SN74LV8T245QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV8T245QPWRQ1 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 SN74LV8T245QPWRQ1?
For technical support, including SN74LV8T245QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV8T245QPWRQ1 requirements.
6.How does Aetrix verify that SN74LV8T245QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LV8T245QPWRQ1 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 SN74LV8T245QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LV8T245QPWRQ1?
All SN74LV8T245QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV8T245QPWRQ1, 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 SN74LV8T245QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74LV8T245QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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