TJA1029T/2Z - 20 kBd LIN 2.2A Transceiver | NXP
MPN: TJA1029T/2Z ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TJA1029T/2Z Overview
A LIN transceiver is a physical-layer interface IC that combines a logic-level transmitter, receiver, bus-driver protection, and LIN bus termination functions. In the vehicle networking hierarchy, LIN connects low-cost nodes for body electronics and in-vehicle subnetworks, while the protocol controller manages frames and scheduling above the transceiver. The TJA1029 therefore bridges a digital controller and the wired LIN network rather than operating as a standalone bus controller.
According to NXP product information, the device supports LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, and SAE J2602. Its principal purpose is in-vehicle subnetworks operating at up to 20 kBd. The verified distributor data identifies TJA1029T/2Z as a half-duplex LIN transceiver with TXD dominant timeout, which is useful where the host controller must avoid an indefinitely asserted transmit command.
NXP states that TJA1029 is pin-compatible with the TJA1020, TJA1021, TJA1022, and TJA1027. That compatibility creates a controlled upgrade path within the same NXP interface family, although designers must still verify electrical limits, timing, fault behavior, package suffix, and production requirements for the specific replacement. The TJA1021T/20/C from the site MPN list is therefore an important family reference, not an automatically interchangeable part without checking its ordering code.
Typical uses include LIN-controlled vehicle body modules, door and seat controllers, climate-control interfaces, lighting modules, sensor gateways, and other low-speed automotive subnetworks. The 20 kBd capability and LIN 2.2A/SAE J2602 positioning align it with established in-vehicle network architectures rather than high-speed body communication buses.
The critical design check is the power and bus environment. Use the manufacturer datasheet for the exact VCC range, LIN transceiver operating limits, pin names, external termination, ESD requirements, and thermal limits before layout release. In particular, verify whether the selected SOIC footprint and pin mapping match the exact package variant being assembled.
Drop-in alternatives for TJA1029T/2Z — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TJA1029T/2Z (same form factor and footprint) — differing in Package, Maximum Baud Rate, Pin Compatibility, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TJA1020
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1021T/20/C
✅ Drop-In✓ In Stock
$0.45 / Unit
View Datasheet →TJA1021T/20/C
✅ Drop-In✓ In Stock
$0.45 / Unit
View Datasheet →TJA1022TK
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →TJA1027
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1029T/2Z Specifications
| Product Type | LIN physical-layer transceiver |
| LIN Bus Speed | Up to 20 kBd |
| LIN Compliance | LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A |
| Automotive Compliance Reference | SAE J2602 |
| Protocol Role | LIN leader/follower physical-bus interface |
| Duplex Mode | Half-duplex LIN transceiver |
| Special Feature | TXD dominant timeout |
| Package | 8-pin SOIC |
| Mounting Type | Surface mount |
| Pin Compatibility | TJA1020, TJA1021, TJA1022, TJA1027 |
TJA1029T/2Z 8-pin soic Pin Configuration Guide
Pin configuration for TJA1029T/2Z (8-pin soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TJA1029T/2Z.
Refer to the datasheet for full pin configuration.
Typical Applications
TJA1029T/2Z is suitable for 6 applications: Vehicle Body Control Modules, Door and Seat Control Units, Climate-Control Interfaces, Automotive Lighting Modules, Sensor and Actuator Gateways, Low-Speed Vehicle Network Test Interfaces.
Vehicle Body Control Modules
The TJA1029T/2Z fits LIN-connected body modules that need a reliable physical interface for switches, lamps, locks, and seat functions. Its verified support for LIN 2.2A, operation up to 20 kBd, and TXD dominant timeout helps a controller detect or prevent a persistently dominant transmit command. Place the transceiver between the host protocol controller and the LIN wiring, then follow the NXP datasheet for termination, decoupling, protection, and PCB layout. The 8-pin SOIC package supports compact automotive controller layouts, while the exact voltage and timing limits must be checked against the vehicle power environment before release.
Recommended
Door and Seat Control Units
Use the TJA1029T/2Z in LIN door, seat, and access modules where distributed wiring reduces harness complexity and low-cost nodes communicate with a central controller. Its verified 20 kBd maximum bus rate and LIN 2.0 through LIN 2.2A support fit established low-speed vehicle subnetworks. TXD dominant timeout is particularly relevant when a software fault or controller reset could otherwise leave the transmitter commanded dominant. Validate the module’s sleep and wake behavior, bus termination, fault recovery, and EMC performance with the complete NXP datasheet because those numeric limits are not included in the supplied search extract.
Recommended
Climate-Control Interfaces
The TJA1029T/2Z is suitable for LIN-connected climate-control submodules that exchange commands and sensor status with a central body controller. The transceiver’s verified LIN 2.2A and SAE J2602 positioning, 20 kBd capability, and half-duplex architecture support low-speed in-vehicle networks used by fan, temperature, actuator, and control-panel nodes. Its TXD dominant timeout adds a defined protection feature for controller command handling, but the exact timeout timing is not supplied here and must be read from the manufacturer datasheet. Confirm supply limits and bus-line protection for the vehicle’s 12 V power environment.
Recommended
Automotive Lighting Modules
TJA1029T/2Z can provide the LIN physical layer for distributed headlamp, tail-lamp, ambient-lighting, and indicator modules. These systems benefit from a dedicated transceiver between a microcontroller and the vehicle network rather than driving the LIN wiring directly from logic pins. The verified 20 kBd rate is appropriate for command and status traffic, while LIN 2.2A support helps align the node with established automotive network requirements. Use the official datasheet to select the external bus components and protection network, and validate dimming, fault signaling, and low-current states at system level.
Recommended
Sensor and Actuator Gateways
The TJA1029T/2Z is appropriate for LIN gateway nodes that aggregate commands for distributed sensors and actuators. Its role is physical-layer conversion between the local protocol controller and the LIN bus, allowing a low-cost automotive node to participate in an established vehicle subnet. The verified support for multiple LIN revisions and SAE J2602 makes it suitable for compatibility-focused designs, while TXD dominant timeout helps a gateway avoid an unintended dominant state after a controller fault. Check wake-up, sleep, fault-recovery, and termination requirements directly in the NXP documentation before schematic approval.
Recommended
Low-Speed Vehicle Network Test Interfaces
Use the TJA1029T/2Z in a LIN interface test fixture or communication daughtercard when bringing a controller, body module, or LIN bus onto a validation bench. Its verified half-duplex LIN role and 20 kBd speed limit match common diagnostic and node-level test setups. TXD dominant timeout allows the test system to monitor transmit-command behavior, while the SOIC package simplifies rework and probe access. Reproduce the vehicle’s supply and bus termination conditions as closely as possible, and use the manufacturer’s pin and timing information to avoid interpreting bench-only behavior as a guaranteed production specification.
Recommended
Recommended Products Summary
Engineering reference data for TJA1029T/2Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1020 | TJA1021 | TJA1021T/20/C | TJA1022 | TJA1027 |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC | SOIC-8 family reference | SOIC-8 family reference | SOIC-8 site-listed family reference | SOIC-8 family reference | SOIC-8 family reference |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
Key Differentiators
- TXD dominant-timeout feature (vs TJA1020)
- Verified LIN revision positioning (vs TJA1021)
- Site-linked family option for internal design navigation (vs TJA1022)
Design Notes
Start the layout from the official NXP TJA1029 datasheet rather than a generic SOIC-8 drawing. Place the LIN transceiver close to the connector or bus entry, keep the LIN trace short and continuous, and provide a direct return-plane path beneath or adjacent to the network connection. Verify the exact LIN termination arrangement and protection components against the selected variant before freezing the PCB footprint.
Treat the vehicle supply as a noisy automotive environment even though the supplied extract does not include the exact VCC range. Add local decoupling at the transceiver supply pins using the values and ESR guidance in the manufacturer datasheet, maintain a low-impedance ground connection, and route transient-current return paths away from sensitive controller ground. Validate brownout, load-dump, reverse-battery, and cold-start behavior in the complete module rather than only at nominal voltage.
Do not assume that NXP-stated pin compatibility makes every TJA1020, TJA1021, TJA1022, or TJA1027 variant a drop-in replacement. Compare the exact ordering suffix, TXD dominant-timeout behavior, LIN thresholds, timing, supply limits, sleep behavior, fault recovery, temperature grade, and package dimensions. A PCB that works with one family member can still fail if an omitted pin has different electrical behavior in the selected alternative.
The LIN physical layer is sensitive to wiring, termination, grounding, and radiated noise even when the data rate is only 20 kBd. Keep the bus connection away from switching nodes and high-current motor or relay paths, use the manufacturer-recommended protection network, and inspect the RXD waveform at the controller with the vehicle harness attached. Test dominant timeout behavior during reset, stuck-command, and fault-recovery scenarios instead of relying only on nominal communication frames.
Compliance Information
The supplied data identifies SAE J2602 and LIN standards but does not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than inferred.