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Texas Instruments TLIN2029DRQ1
- Part No.:
- TLIN2029DRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLIN2029DRQ1.pdf
- Description:
- IC TRANSCEIVER 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TLIN2029DRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to 125°C) fault-protected LIN physical layer transceiver supporting LIN 2.0/2.1/2.2/2.2A and ISO/DIS 17987–4.2 standards, with 20 kbps nominal data rate, ±45 V LIN bus fault protection, and integrated dominant state timeout (DTO) for automotive node safety. It enables reliable communication in body electronics and lighting networks.
For engineers reviewing the TLIN2029DRQ1 datasheet, TLIN2029DRQ1 pinout, TLIN2029DRQ1 application, or TLIN2029DRQ1 equivalent, key selection criteria include LIN bus voltage tolerance (±45 V), ultra-low sleep current (9–30 µA), DTO timeout (20–80 ms), thermal shutdown (165°C), and dual-package availability (SOIC-8 and VSON-8) for AOI-optimized assembly.
Technical Context
The TLIN2029DRQ1 implements a current-limited, wave-shaping LIN driver compliant with ISO/DIS 17987 Param 57 (IBUS_LIM = 75–300 mA) and supports both commander and responder modes via configurable external pull-up. Its receiver features programmable thresholds (VBUSrec = 0.6×VSUP, VBUSdom = 0.4×VSUP) with 0.175×VSUP hysteresis per ISO/DIS 17987 Param 20.
Sleep mode activation is controlled by EN pin or LIN bus wake-up (tLINBUS = 25–150 µs), with glitch-free power-up (tPWR = 1.5 ms) and mode transition delay (tMODE_CHANGE ≤ 15 µs). Protection includes under-voltage lockout (UVSUP = 2.9–3.85 V), thermal shutdown (TSD = 165°C), and loss-of-ground/loss-of-supply detection per ISO/DIS 17987 Params 15–16.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Data Rate | Up to 20 kbps nominal; receiver supports up to 100 kbps for in-line programming. |
| Supply Voltage Range | 4 V to 48 V - operates across full automotive battery range including cold-crank and load-dump conditions. |
| Bus Fault Protection | ±45 V on LIN pin - withstands severe transients without latch-up or damage per ISO 7637-2 Pulse 1/2/3a/3b. |
| Sleep Current | 9–30 µA (VSUP = 4–48 V) - enables always-on LIN nodes with minimal battery drain. |
| Dominant State Timeout | 20–80 ms - prevents bus lockup by forcing recessive state if TXD remains low beyond threshold. |
| ESD Robustness | ±8 kV HBM on LIN/VSUP pins; ±4 kV HBM on logic pins; ±8 kV IEC 61000-4-2 contact discharge. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overtemperature in enclosed modules. |
Pinout & Package
TLIN2029DRQ1 is available in two RoHS-compliant packages: SOIC-8 (4.9 mm × 6.0 mm) and leadless VSON-8 (3.0 mm × 3.0 mm) with exposed thermal pad (DRB variant only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXD (Pin 1) | Open-drain logic output | Drives MCU RX input; requires external pull-up (2.4 kΩ typical); VOL ≤ 0.6 V at 1.5 mA. |
| EN (Pin 2) | Digital enable input | High = normal operation; low = sleep mode; VIH ≥ 2 V, VIL ≤ 0.8 V; internal 125–800 kΩ pull-down. |
| NC (Pin 3) | No connection | Unbonded; must be left floating or tied to GND - no electrical function. |
| TXD (Pin 4) | Logic-level input | Drives LIN bus state; internally pulled down (125–800 kΩ); VIH ≥ 2 V, VIL ≤ 0.8 V. |
| GND (Pin 5) | Power ground reference | Primary return path for VSUP and LIN driver; critical for ESD and fault-current routing. |
| LIN (Pin 6) | High-voltage bidirectional bus I/O | Connects directly to single-wire LIN bus; handles ±45 V faults; integrates 45 kΩ pull-up + series diode. |
| VSUP (Pin 7) | High-voltage supply input | Accepts 4–48 V battery rail; includes under-voltage lockout (2.9–3.85 V) and reverse-blocking diode support. |
| NC (Pin 8) | No connection | Unbonded; must be left floating or tied to GND - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LIN pull-up resistor | 45 kΩ + series diode (0.4–0.7 V drop) - eliminates external components in responder-mode nodes. |
| Dominant state timeout (DTO) | Programmable 20–80 ms timeout - prevents bus lockup during MCU hang or firmware fault. |
| Two-wake-up channel support | Wake from LIN bus (25–150 µs dominant pulse) or local EN pin - enables flexible system-level power management. |
| Loss-of-ground/loss-of-supply detection | Monitors IBUS_NO_GND (±1 mA) and IBUS_NO_BAT (5 µA) - ensures fail-safe behavior during wiring faults. |
| Automated optical inspection (AOI) optimized | VSON-8 package with 0.5 mm pitch and exposed thermal pad - improves solder-joint inspection yield in SMT lines. |
Applications
| Body Electronics Node | Infotainment Gateway |
|---|---|
|
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting via LIN sub-bus. IC Role / Device Role / Timing Role: Physical layer transceiver interfacing MCU to single-wire LIN bus; handles wake-on-LIN and DTO-secured transmission. Use Value: Enables ultra-low-power sleep (9 µA) while maintaining bus responsiveness, reducing parasitic drain in parked vehicles. |
Use Scenario: Central gateway translating CAN messages to LIN for instrument cluster backlighting and HVAC actuators. IC Role / Device Role / Timing Role: LIN bus interface with 100 kbps receiver capability for fast firmware updates during service mode. Use Value: Eliminates need for external LIN pull-up in responder configuration, saving PCB area and BOM cost. |
| Powertrain Sensor Interface | Passive Safety Module |
|
Use Scenario: LIN-connected coolant temperature and oil pressure sensors in hybrid electric vehicle powertrain bay. IC Role / Device Role / Timing Role: Fault-tolerant transceiver operating at 125°C ambient with ±45 V bus protection against engine bay transients. Use Value: Withstands ISO 7637-2 Pulse 3b (100 V) and thermal stress without derating - extends field reliability. |
Use Scenario: Occupant detection system using LIN-connected seat occupancy sensors and airbag control logic. IC Role / Device Role / Timing Role: Safety-critical LIN node requiring AEC-Q100 Grade 1 qualification and DTO to prevent false deployment triggers. Use Value: Thermal shutdown (165°C) and loss-of-ground detection ensure fail-safe behavior during wiring faults or connector disconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029DRQ1 | Lower supply range (5–27 V), no VSON package, 10 kbps max data rate, no 100 kbps programming mode. | Targeted for cost-sensitive 12 V-only systems without high-temp or high-fault requirements. | Select when thermal margin <125°C and bus fault exposure <±25 V suffice; not suitable for 48 V or extreme transient environments. |
| MC33662G1AEK | NXP part with integrated voltage regulator (5 V), different pinout, no DTO, lower ESD rating (±6 kV HBM). | Designed for legacy NXP ecosystem integration; lacks dominant timeout and higher fault protection. | Choose only when migrating existing MC3366x designs; requires PCB redesign and firmware adaptation due to non-pin-compatible layout. |
Compared with TLIN1029DRQ1 and MC33662G1AEK, TLIN2029DRQ1 delivers broader voltage operation (4–48 V), superior fault resilience (±45 V), and essential safety features (DTO, thermal shutdown, loss-of-ground detection) required for next-generation automotive LIN nodes.
Availability
TLIN2029DRQ1 is available at Aetrix Electronics and suitable for body electronics, infotainment gateways, and passive safety systems requiring stable component supply across automotive production lifecycles.
Supply support for TLIN2029DRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade IC design and AEC-Q100 qualification.
The TLIN2029DRQ1 belongs to TI's automotive LIN transceiver product line, engineered specifically for robust, low-power, fault-tolerant in-vehicle networking in harsh environments - from door modules to safety-critical ECUs.
FAQ
What LIN protocol versions does TLIN2029DRQ1 support?
TLIN2029DRQ1 supports LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, and ISO/DIS 17987–4.2 standards. It meets all mandatory electrical and timing requirements defined in these specifications, including duty cycle compliance (D1–D4), bus voltage thresholds (VBUSdom/VBUSrec), and propagation delay (trx_pdr ≤ 6 µs). The TLIN2029DRQ1 also conforms to SAE J2602 recommended practice for LIN physical layer implementation.
Does TLIN2029DRQ1 require external pull-up resistors on the LIN bus?
TLIN2029DRQ1 integrates a 45 kΩ pull-up resistor with a series diode (0.4–0.7 V forward drop) on the LIN pin, eliminating external components in responder-mode applications. Commander-mode nodes still require an external 1 kΩ pull-up plus series diode per LIN specification. This internal resistor reduces BOM count and improves board-level reliability in space-constrained automotive modules.
How does the dominant state timeout (DTO) function in TLIN2029DRQ1?
The TLIN2029DRQ1 implements hardware-based dominant state timeout with a fixed 20–80 ms window. If TXD remains low beyond this period, the driver forces LIN bus recessive regardless of MCU state - preventing bus lockup during firmware hangs or communication errors. This feature is enabled by default and requires no software configuration, providing fail-safe behavior critical for automotive functional safety.
What are the thermal characteristics of TLIN2029DRQ1 in VSON-8 (DRB) package?
In the VSON-8 (DRB) package, TLIN2029DRQ1 achieves RΘJA = 48.5°C/W and RΘJB = 22.2°C/W, significantly better than the SOIC-8 (D) variant (RΘJA = 115.5°C/W). The exposed thermal pad enables direct PCB copper pour connection, improving heat dissipation in high-ambient environments like engine compartments. Thermal shutdown activates at 165°C with 15°C hysteresis to protect silicon integrity.
Can TLIN2029DRQ1 operate in 48 V automotive systems?
Yes, TLIN2029DRQ1 supports 4 V to 48 V supply voltage (VSUP) and is qualified for 48 V mild-hybrid architectures. Its absolute maximum ratings allow 60 V transient survival, and its LIN bus withstands ±45 V faults - exceeding ISO 7637-2 Pulse 1 (–100 V) and Pulse 2 (75 V) requirements. The device maintains full functionality across the entire 4–48 V range, including sleep current stability and DTO accuracy.
TLIN2029DRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- LIN
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- -
- Receiver Hysteresis:
- 200 mV
- Data Rate:
- 20kbps
- Voltage - Supply:
- 4V ~ 48V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLIN2029DRQ1 FAQ
1.How can I place an order for TLIN2029DRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLIN2029DRQ1 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 TLIN2029DRQ1 reliable?
The price and inventory of TLIN2029DRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLIN2029DRQ1 is usually 5 days.
3.What payment methods are accepted for TLIN2029DRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLIN2029DRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLIN2029DRQ1?
TLIN2029DRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLIN2029DRQ1 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 TLIN2029DRQ1?
For technical support, including TLIN2029DRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLIN2029DRQ1 requirements.
6.How does Aetrix verify that TLIN2029DRQ1 is sourced from the original manufacturer or authorized distributors?
All TLIN2029DRQ1 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 TLIN2029DRQ1 meets industry standards.
7.What is the process for return or replacement of TLIN2029DRQ1?
All TLIN2029DRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLIN2029DRQ1, 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 TLIN2029DRQ1 part is unused and in its original packaging.
Return procedure for TLIN2029DRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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