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Texas Instruments SN74LV1T34QDCKRQ1
- Part No.:
- SN74LV1T34QDCKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LV1T34QDCKRQ1.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LV1T34QDCKRQ1 from Texas Instruments is an automotive-grade single-channel CMOS buffer logic level shifter supporting bidirectional voltage translation across 1.8 V to 5.5 V supply rails. It performs Y = A buffering with 5.5 V-tolerant inputs, enables up-translation (e.g., 1.2 V → 1.8 V) and down-translation (e.g., 5.0 V → 3.3 V), and delivers ≤4.7 ns propagation delay at 5.0 V VCC for use in automotive body control modules requiring robust signal interfacing between mixed-voltage subsystems.
For engineers reviewing the SN74LV1T34QDCKRQ1 datasheet, SN74LV1T34QDCKRQ1 pinout, SN74LV1T34QDCKRQ1 application, or SN74LV1T34QDCKRQ1 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (-40°C to +125°C), 5.5 V input tolerance, 150 Mbps data rate capability, LVxT enhanced input thresholds, and SC70-5 package compatibility with space-constrained PCB layouts.
Technical Context
The SN74LV1T34QDCKRQ1 implements a single positive-logic buffer (Y = A) with supply-referenced CMOS outputs and asymmetric input threshold design: low VIH/VIL enables up-translation from sub-1.8 V sources, while 5.5 V-tolerant inputs support down-translation from higher-voltage domains. Its LVxT architecture eliminates external biasing components required by discrete resistor-based translators.
It operates across 1.6 V–5.5 V VCC with guaranteed switching performance up to 150 Mbps at 3.3 V/5.0 V, exhibits balanced push-pull drive (±15 mA output current at 3.3 V), and maintains stable logic states under automotive thermal stress via AEC-Q100-compliant thermal design (RθJA = 293.4°C/W in DCK package).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.6 V to 5.5 V - supports direct integration into 1.8 V, 2.5 V, 3.3 V, and 5 V system rails without level-shifting circuitry |
| Input Tolerance | 5.5 V - allows connection to legacy 5 V logic without external clamping diodes or resistors |
| Propagation Delay | ≤4.7 ns at 5.0 V VCC, CL = 15 pF - enables reliable operation in high-speed automotive serial links (e.g., LIN, SENT, GPIO expansion) |
| Output Drive | ±15 mA at 3.3 V VCC - sufficient to directly drive LEDs, optocouplers, or CMOS inputs without external buffers |
| ESD Rating | HBM ±4 kV, CDM ±2 kV - meets AEC-Q100-002/-011 requirements for automotive ECU environments |
| Operating Temp | -40°C to +125°C (Grade 1) - qualified for under-hood and powertrain applications per ISO 16750-4 |
| Input Capacitance | 10 pF max at 3.3 V - minimizes loading on source drivers and preserves signal integrity in high-frequency paths |
Pinout & Package
SN74LV1T34QDCKRQ1 is packaged in a 5-pin SC70 (DCK) outline measuring 2.0 mm × 2.1 mm (body: 2.0 mm × 1.25 mm), optimized for compact automotive PCBs with tight thermal and space constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N.C.) | No Connect | Unused internal pad - must remain unconnected; no routing or soldering required |
| 2 (A) | Input | Single logic input accepting 0–5.5 V signals; low-threshold VIH enables up-translation from 1.2 V/1.5 V/1.8 V sources |
| 3 (GND) | Ground Reference | Primary return path for all internal logic and output currents; requires low-impedance connection to system ground plane |
| 4 (Y) | Output | CMOS push-pull output referenced to VCC; drives 1.8 V–5 V logic levels with matched sourcing/sinking capability |
| 5 (VCC) | Positive Supply | Single power rail defining output voltage swing and input threshold levels; requires local 0.1 µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40°C to +125°C junction temperature, including thermal cycling and humidity testing |
| LVxT Enhanced Input Thresholds | VIH as low as 1.1 V at 1.65 V VCC enables reliable up-translation from 1.2 V microcontrollers without signal degradation |
| 5.5 V-Tolerant Inputs | Accepts 5 V logic signals while powered from 1.8 V/2.5 V/3.3 V rails - eliminates need for external voltage dividers or clamps |
| Bidirectional Translation Support | Configurable for both 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) via VCC selection |
| Low Static Current | ICC ≤ 10 µA at 1.8–5.5 V - reduces quiescent power in always-on vehicle subsystems such as door modules and lighting controllers |
Applications
| Automotive Body Control Unit (BCU) | LED Driver Interface |
|---|---|
Use Scenario: Interfacing a 1.8 V CAN controller GPIO with a 5 V HVAC actuator driver IC in a vehicle body control module. IC Role / Device Role / Timing Role: Single-channel level shifter translating 1.8 V control signals to 5 V-compatible enable lines while maintaining <5 ns timing margin for real-time actuation. Use Value: Eliminates discrete resistor networks and saves 2.5 mm² PCB area versus dual-transistor solutions, meeting ASAM MCD-2 MC timing compliance. | Use Scenario: Driving a 3.3 V LED indicator from a 1.2 V automotive sensor microcontroller output pin. IC Role / Device Role / Timing Role: Buffer-level translator providing 3.3 V output swing with 15 mA drive strength to ensure full LED brightness without external MOSFET. Use Value: Enables direct LED control from ultra-low-voltage sensors, reducing BOM count by one active component and simplifying layout in instrument cluster assemblies. |
| Infotainment System I/O Expansion | Automotive Diagnostic Port Interface |
Use Scenario: Expanding GPIO count of a 3.3 V infotainment SoC to interface with legacy 5 V display backlight controllers and touch panel ICs. IC Role / Device Role / Timing Role: Voltage translator enabling bidirectional communication between 3.3 V host and 5 V peripherals with <7 ns propagation delay at 3.3 V VCC. Use Value: Supports 150 Mbps data rates required for PWM dimming synchronization and touch response latency <10 ms, satisfying UNECE R155 functional safety alignment. | Use Scenario: Isolating diagnostic communication lines (e.g., UDS over UART) between a 5 V OBD-II port and a 1.8 V automotive debug microcontroller. IC Role / Device Role / Timing Role: Level-shifting buffer ensuring signal integrity during ISO 14229-1 diagnostic session handshaking with 5.5 V-tolerant input protection. Use Value: Prevents damage from 12 V battery transients on diagnostic lines while maintaining <1 µA leakage current to avoid parasitic drain in parked vehicle mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar logic level shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1T45QDCKRQ1 | Bidirectional 3-state bus transceiver with direction control pin; requires external DIR signal routing | Supports bidirectional data flow (e.g., I²C, SPI), unlike unidirectional SN74LV1T34QDCKRQ1 | Select when protocol-level bidirectionality is needed; avoid if only unidirectional buffering is required due to added complexity |
| TXS0101QPWRQ1 | Auto-direction sensing with integrated 10 kΩ pull-up resistors; higher ICC (10 µA typical vs. 1 µA) | Designed for open-drain interfaces like I²C; not suitable for push-pull CMOS signaling without external pull-ups | Prefer for I²C/SMBus applications; unsuitable for high-speed GPIO or LED driving where low static current and push-pull drive are critical |
Compared with SN74LVC1T45QDCKRQ1 and TXS0101QPWRQ1, the SN74LV1T34QDCKRQ1 offers lowest quiescent current, simplest unidirectional implementation, and highest speed for dedicated buffer applications - making it optimal for automotive GPIO expansion where direction control overhead and power budget are constrained.
Availability
SN74LV1T34QDCKRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, LED driver interfaces, infotainment I/O expansion, and diagnostic port isolation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV1T34QDCKRQ1 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 electronics, with decades of AEC-Q100 validation expertise and broad automotive qualification infrastructure.
The SN74LV1T34QDCKRQ1 belongs to TI's LVxT family of single-gate logic level shifters engineered specifically for automotive signal interfacing - delivering robust voltage translation in space- and power-constrained ECUs without external passive components.
FAQ
What is the maximum data rate supported by the SN74LV1T34QDCKRQ1?
The SN74LV1T34QDCKRQ1 supports up to 150 Mbps at 5.0 V or 3.3 V VCC, verified under load capacitance ≤50 pF and operating temperature -40°C to +125°C. This performance is enabled by its optimized LVxT input structure and low-propagation-delay CMOS output stage, making SN74LV1T34QDCKRQ1 suitable for high-speed automotive GPIO, SENT sensor interfaces, and PWM-controlled lighting systems.
Can the SN74LV1T34QDCKRQ1 translate 1.2 V inputs to 3.3 V outputs?
Yes, the SN74LV1T34QDCKRQ1 supports 1.2 V to 3.3 V up-translation when powered from a 3.3 V VCC supply. Its LVxT-enhanced input thresholds (VIH = 1.45 V min at 3.3 V VCC) ensure reliable recognition of 1.2 V logic HIGH signals, and the output swings rail-to-rail to 3.3 V. This capability is explicitly validated in TI's SCLS903B datasheet and makes SN74LV1T34QDCKRQ1 ideal for interfacing ultra-low-power sensors with standard 3.3 V automotive microcontrollers.
Is the SN74LV1T34QDCKRQ1 pin-compatible with other SC70-5 logic devices?
The SN74LV1T34QDCKRQ1 uses the standard SC70-5 (DCK) footprint with pin 1 (N.C.), pin 2 (A), pin 3 (GND), pin 4 (Y), and pin 5 (VCC). While mechanical pinout matches generic SC70-5 packages, electrical functionality (e.g., N.C. pin, LVxT thresholds, 5.5 V tolerance) is unique to this device. Substitution with non-LVxT SC70-5 buffers (e.g., SN74LVC1G34) would require redesign verification due to differing input voltage specifications and translation capability.
Does the SN74LV1T34QDCKRQ1 require external pull-up or pull-down resistors on its input?
No, the SN74LV1T34QDCKRQ1 does not require external pull-up or pull-down resistors on its input (pin A) when actively driven, as its CMOS input has high impedance (<1 µA leakage) and defined VIH/VIL thresholds. However, unused inputs must never be left floating: if pin A is not used in a given design, it must be tied to VCC or GND. The SN74LV1T34QDCKRQ1 itself contains no internal termination resistors - external biasing is only needed for undriven or intermittently driven nodes.
How does the SN74LV1T34QDCKRQ1 handle 5 V inputs while operating from a 1.8 V supply?
When powered from 1.8 V VCC, the SN74LV1T34QDCKRQ1 accepts 5 V inputs safely due to its 5.5 V-tolerant input structure, which includes integrated negative clamping diodes and current-limited input protection. The device correctly interprets 5 V as a logic HIGH (VIH condition met), and outputs a 1.8 V logic HIGH on pin Y. This down-translation capability is validated per AEC-Q100 and allows SN74LV1T34QDCKRQ1 to interface legacy 5 V automotive subsystems with modern 1.8 V domain controllers without external components.
SN74LV1T34QDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Push-Pull
- 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:
- SC-70-5
SN74LV1T34QDCKRQ1 FAQ
1.How can I place an order for SN74LV1T34QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV1T34QDCKRQ1 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 SN74LV1T34QDCKRQ1 reliable?
The price and inventory of SN74LV1T34QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV1T34QDCKRQ1 is usually 5 days.
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SN74LV1T34QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV1T34QDCKRQ1 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 SN74LV1T34QDCKRQ1?
For technical support, including SN74LV1T34QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV1T34QDCKRQ1 requirements.
6.How does Aetrix verify that SN74LV1T34QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LV1T34QDCKRQ1 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 SN74LV1T34QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LV1T34QDCKRQ1?
All SN74LV1T34QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV1T34QDCKRQ1, 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 SN74LV1T34QDCKRQ1 part is unused and in its original packaging.
Return procedure for SN74LV1T34QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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