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Texas Instruments TPIC1021DR
- Part No.:
- TPIC1021DR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPIC1021DR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,063
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Product details
Overview
TPIC1021DR from Texas Instruments is a LIN 2.1-compliant physical layer transceiver for automotive and industrial networks, featuring integrated 30-kΩ LIN pull-up resistor, dominant state timeout protection, ±12 kV HBM ESD rating on LIN pin, and operation across 7–27 V supply with –40°C to +125°C ambient range. It serves as the bidirectional single-wire interface between MCU UART/SCI and LIN bus in vehicle body electronics.
For engineers reviewing the TPIC1021DR datasheet, TPIC1021DR pinout, TPIC1021DR application, or TPIC1021DR equivalent, key selection criteria include LIN 2.1 compliance, wake-up capability via LIN/NWake/EN, INH-controlled external regulator enable, low-power mode current (20–100 µA), and bus fault tolerance up to ±40 V on LIN pin.
Technical Context
The TPIC1021DR implements a slope-controlled low-side driver with thermal shutdown and dominant state timeout (6–14 ms), enabling robust LIN bus transmission at up to 20 kbps. Its receiver uses ratio-metric thresholds (40–60% of VSUP) with 5–17.5% hysteresis for noise immunity in automotive environments.
Three operational modes-Normal (TXD/RXD active), Standby (LIN termination + INH enabled, RXD pulled low), and Low Power (EN = 0, <100 µA quiescent)-are controlled by EN, NWake, and LIN bus activity. Wake-up filtering (25–100 µs) prevents false triggers on both LIN and NWake inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | LIN Physical Layer Specification Revision 2.1, SAE J2602 recommended practice |
| Bus Speed | Up to 20 kbps; minimum supported rate 2.4 kbps due to dominant state timeout |
| Supply Range | 7 V to 27 V DC continuous; survives 40 V transients per ISO 7637 |
| ESD Protection | ±12 kV HBM on LIN pin; ±9 kV on NWake; ±3 kV on logic pins |
| Low-Power Current | 20–100 µA depending on VSUP (7–27 V) and mode configuration |
| LIN Pin Voltage Range | –40 V to +40 V DC; no reverse current to VSUP during ground shift or supply loss |
| Operating Temp | –40°C to +125°C ambient; junction shutdown at 185°C with 25°C hysteresis |
Pinout & Package
TPIC1021DR is housed in an SOIC-8 package (4.90 mm × 3.91 mm), optimized for automotive PCB layouts with thermal pad compatibility and creepage clearance for 40 V bus operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RXD | Open-drain output | Reports LIN bus state to MCU: low = dominant (0), high = recessive (1); requires external pull-up if MCU lacks internal one |
| 2 - EN | Digital input | Active-high enable: high = Normal Mode, low = Low Power Mode; internal pull-down ensures safe default state |
| 3 - NWake | High-voltage wake-up input | Accepts falling-edge wake-up from external switch; filtered (25–100 µs) to reject noise; internal pull-up to VSUP |
| 4 - TXD | Digital input | MCU UART output controlling LIN driver: low = dominant, high = recessive; compatible with 3.3 V/5 V I/O; internal pull-down |
| 5 - GND | Reference ground | Device ground connection; supports system-level ground shift as long as VSUP remains ≥7 V |
| 6 - LIN | Bidirectional bus I/O | Single-wire LIN interface with integrated 30-kΩ pull-up + series diode for responder use; handles –40 V to +40 V |
| 7 - VSUP | Power supply input | 7–27 V DC supply input; connected to battery via external reverse-blocking diode; protected against 40 V transients |
| 8 - INH | Open-drain output | Controls external voltage regulator inhibit pin; high = regulator enabled (Normal/Standby), high-impedance = disabled (Low Power) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LIN Responder Termination | 30-kΩ pull-up + series diode eliminates need for external components in responder nodes |
| Dominant State Timeout | 6–14 ms hardware timer disables transmitter if TXD stuck low, preventing bus lockup |
| Multi-Source Wake-Up | Supports remote (LIN bus dominant pulse), local (NWake falling edge), and host (EN high) wake-up paths |
| INH-Controlled Regulator Enable | INH pin drives external regulator's inhibit input, enabling coordinated power sequencing in ECU designs |
| Automotive Bus Fault Tolerance | Withstands ±40 V LIN pin voltage, short-to-battery/short-to-ground, ISO 7637 transients, and ground disconnection |
Applications
| Body Control Module (BCM) | Seat Position Memory System |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting via LIN subnetwork. IC Role / Device Role / Timing Role: TPIC1021DR acts as LIN physical layer interface between MCU and LIN bus, translating UART signals to LIN voltage levels while managing wake-up and power sequencing. Use Value: Enables ultra-low standby current (<100 µA) and reliable wake-up from sleep via LIN command or local switch, meeting OEM requirements for always-on but energy-efficient modules. | Use Scenario: LIN-connected seat ECU stores and recalls multiple seat positions using motor drivers and position sensors. IC Role / Device Role / Timing Role: TPIC1021DR provides fault-tolerant LIN communication and controls external 5 V regulator via INH pin to power MCU and motor drivers only when active. Use Value: Integrated 30-kΩ pull-up simplifies responder design; ±40 V LIN tolerance prevents damage during jump-start or load-dump events. |
| Roof Module with Sunroof Control | Trunk/Liftgate Actuation System |
Use Scenario: Roof-mounted LIN node manages sunroof motor, ambient light sensor, and rain sensor outputs. IC Role / Device Role / Timing Role: TPIC1021DR interfaces MCU to LIN bus, provides wake-up on sunroof request, and enables regulator via INH to power analog front-end only during operation. Use Value: Dominant state timeout prevents bus hang if MCU firmware freezes during sunroof movement commands. | Use Scenario: Liftgate module receives LIN commands to open/close trunk, monitor latch status, and detect obstruction. IC Role / Device Role / Timing Role: TPIC1021DR serves as LIN transceiver with wake-up triggered by button press (NWake) or LIN command, and regulates power via INH to motor driver IC. Use Value: Thermal protection and short-circuit immunity ensure reliability during repeated actuation cycles in hot/cold environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029DR | LIN 2.2A compliant; lower quiescent current (15 µA typical in sleep); integrated watchdog timer; no INH pin | Requires external regulator control logic; better suited for new designs targeting latest LIN spec and lowest power | Choose TLIN1029DR for greenfield designs requiring LIN 2.2A and watchdog; retain TPIC1021DR for legacy LIN 2.1 systems with INH-based power management |
| SN65HVDA100QDRQ1 | AEC-Q100 Grade 1; higher ESD (±15 kV HBM on LIN); wider temp range (–40°C to +150°C); no integrated pull-up or INH | Needs external 1-kΩ pull-up and discrete regulator enable circuit; preferred for under-hood applications above 125°C | Choose SN65HVDA100QDRQ1 for extreme temperature or higher ESD margin; TPIC1021DR remains optimal for cost-sensitive cabin modules with built-in pull-up and INH |
Compared with TLIN1029DR and SN65HVDA100QDRQ1, the TPIC1021DR uniquely combines LIN 2.1 compliance, integrated 30-kΩ pull-up for responders, and INH-controlled regulator enable-reducing BOM count and simplifying power sequencing in body electronics without requiring external logic or regulators.
Availability
TPIC1021DR is available at Aetrix Electronics and suitable for automotive body control modules, seat memory systems, roof modules, and liftgate actuators requiring stable component supply across extended product lifecycles.
Supply support for TPIC1021DR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The TPIC1021DR belongs to TI's automotive LIN transceiver portfolio, designed specifically for robust, low-power, single-wire communication in vehicle body electronics where fault tolerance, wake-up reliability, and simplified BOM are critical.
FAQ
What LIN protocol revision does the TPIC1021DR support?
The TPIC1021DR supports LIN Physical Layer Specification Revision 2.1 and conforms to SAE J2602 recommended practice. It is backward-compatible with LIN 2.0 timing and threshold definitions, and its duty cycle and propagation delay parameters meet LIN 2.1 requirements for 10.4 kbps and 20 kbps operation. The device datasheet explicitly states "LIN 2.1 compatible" in timing notes and revision history.
Does the TPIC1021DR require external components for LIN responder applications?
No, the TPIC1021DR integrates a 30-kΩ pull-up resistor and series diode on the LIN pin, eliminating external components for LIN responder node implementations. Commander applications do require an external 1-kΩ pull-up resistor plus a series blocking diode. This integration reduces BOM count and PCB area specifically for responder use cases such as door modules or seat ECUs.
How does the TPIC1021DR manage power sequencing with external regulators?
The TPIC1021DR uses its INH (inhibit) pin to directly control external voltage regulators with inhibit inputs. In Normal and Standby modes, INH is driven high (VSUP level) to enable the regulator; in Low Power mode, INH goes high-impedance to disable it. This allows coordinated power-down of downstream circuitry, reducing system-level quiescent current. The INH output can source up to 2 mA and drive external transistors for interrupt signaling.
What wake-up sources are supported by the TPIC1021DR?
The TPIC1021DR supports three independent wake-up sources: (1) dominant-state transition on the LIN bus (filtered for 25–100 µs), (2) falling edge on the NWake pin (also filtered), and (3) assertion of the EN pin high. All wake-up paths activate Standby Mode first-pulling RXD low-before transitioning to Normal Mode upon EN high. This staged wake-up ensures reliable system-level power sequencing.
Is the TPIC1021DR suitable for automotive under-hood applications?
The TPIC1021DR is rated for –40°C to +125°C ambient operation and meets ISO 7637 transient immunity, making it suitable for cabin and chassis applications. However, it is not specified for >125°C ambient or AEC-Q100 Grade 0/1 extended temperature grades. For under-hood locations exceeding 125°C, alternatives like SN65HVDA100QDRQ1 (–40°C to +150°C, AEC-Q100 Grade 1) are recommended instead of the TPIC1021DR.
TPIC1021DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TPIC
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Transceiver
- Protocol:
- LINbus
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 500 mV
- Data Rate:
- -
- Voltage - Supply:
- 7V ~ 27V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPIC1021DR FAQ
1.How can I place an order for TPIC1021DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPIC1021DR 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 TPIC1021DR reliable?
The price and inventory of TPIC1021DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPIC1021DR is usually 5 days.
3.What payment methods are accepted for TPIC1021DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPIC1021DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPIC1021DR?
TPIC1021DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPIC1021DR 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 TPIC1021DR?
For technical support, including TPIC1021DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPIC1021DR requirements.
6.How does Aetrix verify that TPIC1021DR is sourced from the original manufacturer or authorized distributors?
All TPIC1021DR 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 TPIC1021DR meets industry standards.
7.What is the process for return or replacement of TPIC1021DR?
All TPIC1021DR units undergo pre-shipment inspection (PSI). If there is an issue with TPIC1021DR, 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 TPIC1021DR part is unused and in its original packaging.
Return procedure for TPIC1021DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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