TJA1029T/2Z - 20 kBd LIN 2.2A Transceiver | NXP
MPN： TJA1029T/2Z ✓ 啟用中TJA1029T/2Z 概覽
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.
直接替換替代品，適用於 TJA1029T/2Z — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TJA1029T/2Z （相同外形與佔位） — 差異在於 Package, Product Type, Maximum Baud Rate, Pin Compatibility.
TJA1020
✅ 直接替換📋 參考替代品（不在目錄中）
TJA1021T/20/C
✅ 直接替換聯絡詢價
查看資料表 →TJA1021T/20/C
✅ 直接替換聯絡詢價
查看資料表 →TJA1022TK
✅ 直接替換聯絡詢價
查看資料表 →TJA1027
✅ 直接替換📋 參考替代品（不在目錄中）
TJA1029T/2Z 規格
| 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 |
| 封裝 | 8-pin SOIC |
| 安裝類型 | Surface mount |
| Pin Compatibility | TJA1020, TJA1021, TJA1022, TJA1027 |
TJA1029T/2Z 8-pin soic 腳位配置指南
TJA1029T/2Z（8-pin soic 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TJA1029T/2Z.
請參閱 資料表 以查看完整腳位配置。
典型應用
TJA1029T/2Z 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 TJA1029T/2Z — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- TXD dominant-timeout feature (對比TJA1020)
- Verified LIN revision positioning (對比TJA1021)
- Site-linked family option for internal design navigation (對比TJA1022)
設計說明
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.
合規資訊
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.