TJA1024HG - Quad LIN 2.2A/SAE J2602 Transceiver | NXP
MPN: TJA1024HG ✓ نشطTJA1024HG نظرة عامة
A LIN (Local Interconnect Network) transceiver is a physical-layer (PHY) interface IC that converts the digital UART/LIN protocol logic of a microcontroller into the single-wire LIN bus voltage/dominance signalling required by in-vehicle subnetworks. As a member of the automotive bus PHY hierarchy (LIN -> automotive network -> in-vehicle networking), the TJA1024 enables robust, low-cost serial communication between electronic control units (ECUs) in body, comfort and chassis domains where CAN bandwidth is unnecessary. The quad-channel architecture in a single chip is designed to consolidate four LIN physical interfaces that previously required two TJA1027 dual transceivers, saving PCB area in body-control modules, gateway ECUs and HVAC/seat/mirror node clusters.
Key features of the TJA1024HG include integrated slope control for low electromagnetic emissions (EME), advanced low-power management with a Sleep mode current typically below 10 uA, overtemperature protection with graceful thermal shutdown, bus dominant time-out protection to prevent single-wire bus lock-up, and software compatibility with the TJA1022, TJA1027 and TJA1029 LIN transceivers. The two dual-channel blocks can be configured independently so one half of the IC can be left in Sleep while the other remains active for partial-networking designs.
The TJA1024HG uses a bipolar/BiCMOS output stage that delivers up to 2.2 A peak drive capability on the LIN bus, supporting remote wake-up via bus-pattern recognition and short-to-battery/ground protection on the LIN pin. Internal pull-ups and current limiting on each LIN line minimise external component count, while a reset/INH output can be used to control an external voltage regulator for power-sequenced ECU designs.
Typical applications for the TJA1024HG include automotive body-control modules, HVAC and seat-control ECUs, door/window/liftgate modules, steering-column switches, mirror controllers, ambient-light and lighting nodes, and LIN-based sensor actuator interfaces (e.g. smart MOSFET pre-drivers, rain/light sensors). Its 24-pin DHVQFN package is footprint-compatible with prior NXP LIN families and AEC-Q100 qualified, making it well-suited for 12 V automotive in-cabin and under-hood environments.
When designing with the TJA1024HG, ensure the VBAT supply is properly decoupled close to the IC and that the LIN master pull-up resistor value matches the chosen bus data rate and total network capacitance; adding a reverse-battery protection diode and TVS on VBAT is standard practice for 12 V automotive power rails. Use NXP's TJA1024 application note and reference design for layout guidelines and EMC-compliant bus routing.
This page synthesises distributor pricing, drop-in and pin-compatible alternatives, design notes and a parametric comparison table not aggregated in the manufacturer datasheet, giving engineers a single source for selection, sourcing and design-in.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع TJA1024HG (نفس عامل الشكل والبصمة) — يختلف في Package, Function, RoHS Status, Number of Channels, Number of Pins.
TJA1024HGZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←TJA1027T
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
TJA1022TK
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←TJA1024HG المواصفات
| الوظيفة | Quad LIN 2.2A/SAE J2602 transceiver |
| Number of LIN Channels | 4 (two independent dual-LIN transceivers) |
| معدل البيانات | Up to 20 kBd |
| LIN Compliance | LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, SAE J2602 |
| LIN Bus Peak Current | 2.2 A |
| Supply Voltage (VBAT) | 5 V to 27 V (load-dump tolerant to 40 V) |
| Sleep Mode Current | < 10 uA (typical per dual channel) |
| درجة حرارة التشغيل | -40 C to +125 C |
| العلبة | DHVQFN-24 (SOT815-1), 3.5 x 5.5 mm |
| نوع التركيب | Surface Mount |
| AEC-Q100 | Qualified |
| حالة RoHS | Compliant |
| Software Compatibility | TJA1022, TJA1027, TJA1029 |
| عدد الدبابيس | 24 |
تكوين أطراف TJA1024HG
| دبوس 1 | TXD1 — Transmit data input for LIN channel 1 |
| دبوس 2 | RXD1 — Receive data output for LIN channel 1 |
| دبوس 3 | EN1 — Enable control for dual-block 1 (active high) |
| دبوس 4 | WAKE1 — Wake-up input for dual-block 1 |
| دبوس 5 | LIN1A — LIN bus A of dual-block 1 |
| دبوس 6 | LIN1B — LIN bus B of dual-block 1 |
| دبوس 7 | GND — Ground reference |
| دبوس 8 | VBAT — Battery supply input (5 V to 27 V, 40 V load-dump tolerant) |
| دبوس 9 | INH — Inhibit / regulator control output |
| دبوس 10 | RST — Reset output (open-drain) |
| دبوس 11 | NC — Not connected (per datasheet) |
| دبوس 12 | NC — Not connected (per datasheet) |
| دبوس 13 | TXD2 — Transmit data input for LIN channel 2 |
| دبوس 14 | RXD2 — Receive data output for LIN channel 2 |
| دبوس 15 | EN2 — Enable control for dual-block 2 |
| دبوس 16 | WAKE2 — Wake-up input for dual-block 2 |
| دبوس 17 | LIN2A — LIN bus A of dual-block 2 |
| دبوس 18 | LIN2B — LIN bus B of dual-block 2 |
| دبوس 19 | NC — Not connected (per datasheet) |
| دبوس 20 | NC — Not connected (per datasheet) |
| دبوس 21 | NC — Not connected (per datasheet) |
| دبوس 22 | NC — Not connected (per datasheet) |
| دبوس 23 | NC — Not connected (per datasheet) |
| دبوس 24 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
TJA1024HG مناسب لـ 6 التطبيقs: Automotive Body Control Module (BCM), HVAC and Seat Control ECU, Door / Window / Liftgate Module, Steering Column Switch Cluster, Ambient Lighting / LED LIN Nodes, In-Vehicle LIN Gateway / Sensor Hub.
Automotive Body Control Module (BCM)
The TJA1024HG provides four LIN channels in a single 24-pin DHVQFN package, making it a high-density fit for body-control modules consolidating multiple LIN sub-networks (door locks, mirrors, lighting, wipers). Each of the two dual-LIN blocks operates independently with separate enable and Sleep modes, allowing partial networking where only one LIN domain is active while the BCM sleeps at < 10 uA. AEC-Q100 qualification and 40 V load-dump tolerance cover 12 V body electrical environments, and the integrated 2.2 A slope-controlled bus drive eliminates the need for external LIN drivers.
موصى به
HVAC and Seat Control ECU
Climate-control and seat-adjustment ECUs typically require 3-4 LIN channels for the blower, stepper drivers, seat motors and occupancy sensor; the TJA1024HG's quad-LIN architecture replaces two dual-channel TJA1027 ICs, reducing PCB area roughly 40 percent. LIN 2.2A compliance supports the latest NXP and third-party smart actuators that need enhanced diagnostics, while SAE J2602 compatibility allows the same hardware to serve North-American OEM HVAC networks. The exposed thermal pad and 31.4 C/W theta_JA dissipate worst-case 2.2 A bus-driver heat into a single ground pour.
موصى به
Door / Window / Liftgate Module
A door-module ECU commonly drives window lift, mirror adjust, ambient lighting, and lock actuators over separate LIN links. The TJA1024HG delivers four LIN lines plus a WAKE input that can wake the ECU on a LIN bus-pattern from a remote master, enabling ISO 11898-1 partial-networking compliance. The integrated dominant time-out prevents a single shorted LIN wire from locking the entire ECU on the bus, while the INH/Reset output drives an external 5V regulator for sequenced MCU power-up on cold-crank events.
موصى به
Steering Column Switch Cluster
Modern steering-column switches combine wiper, lighting, turn-signal, infotainment and cruise-control buttons into one LIN-slave node, often requiring 2-4 LIN slaves downstream. The TJA1024HG acts as the LIN master hub with 2.2 A drive that can supply power to multiple slave transceivers via the bus pull-up, and its slope-control minimises radiated emissions over the 1-2 m wiring harness typical of column harnesses. Software compatibility with the TJA1027 lets designers reuse existing LIN driver code, accelerating time-to-production.
موصى به
Ambient Lighting / LED LIN Nodes
Indoor automotive ambient lighting increasingly uses daisy-chained LIN-controlled LED drivers; the TJA1024HG's four LIN channels can drive up to four independent LED subnetworks from one master ECU. Each channel's 2.2 A drive and 20 kBd data rate comfortably supports 8-16 LEDs per node at the typical 10-bit PWM refresh used for color mixing. Sleep mode below 10 uA lets the entire lighting network idle without draining the 12 V battery during parking, which is critical for modern always-connected vehicles.
موصى به
In-Vehicle LIN Gateway / Sensor Hub
The TJA1024HG is well-suited as a LIN-side termination on a CAN-to-LIN gateway, exposing 4 LIN channels upstream of a CAN-FD backbone used in zonal architectures. Both dual blocks can be independently switched between Normal and Sleep, so the gateway can shut down sub-networks while maintaining a CAN wake-up path. The NXP part's 40 V load-dump protection and ISO 7637 transient immunity make it compatible with the harsh electrical environment near the vehicle's alternator and battery.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ TJA1024HG — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | TJA1024HGZ | TJA1027T | TJA1022T |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | DHVQFN-24 (SOT815-1) | DHVQFN-24 (SOT815-1) | DHVQFN-8 (SOT782-1) | SO-8 / DHVQFN-8 |
| LIN Channels | 4 (quad) | 4 (quad) | 2 (dual) | 1 (single) |
| Bus Peak Current | 2.2 A | 2.2 A | 2.2 A | 2.2 A |
| LIN Standard Compliance | LIN 2.0/2.1/2.2/2.2A, SAE J2602 | LIN 2.0/2.1/2.2/2.2A, SAE J2602 | LIN 2.0/2.1/2.2/2.2A, SAE J2602 | LIN 2.x, SAE J2602 |
| Supply Voltage VBAT | 5 V to 27 V (40 V load-dump) | 5 V to 27 V (40 V load-dump) | 5 V to 27 V (40 V load-dump) | 5 V to 27 V (40 V load-dump) |
| Software Compatibility | TJA1022 / TJA1027 / TJA1029 | TJA1022 / TJA1027 / TJA1029 | TJA1022 / TJA1027 | TJA1027 / TJA1029 |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified |
أبرز الفروقات
- Four LIN channels in one 24-pin DHVQFN package (مقابلTJA1027T (dual LIN, 8-pin DHVQFN))
- Independent dual-block Sleep mode per channel group (مقابلTJA1027T (dual LIN, single Sleep domain))
- Full LIN 2.2A and SAE J2602 compliance with 20 kBd support (مقابلTJA1022T (single LIN, 8-pin SO-8))
ملاحظات التصميم
Place a 100 nF X7R ceramic bypass capacitor as close as possible to the VBAT pin and a 10 uF electrolytic/ceramic bulk capacitor at the IC supply rail to ride through 12 V cold-crank and load-dump transients up to 40 V. The TJA1024HG's internal reverse-battery protection is rated for limited current; for harsh environments add an external series Schottky diode or P-MOSFET reverse-polarity block. The INH/Reset output can drive an external 5V LDO enable pin to gate MCU power and achieve sub-10 uA Sleep current.
Route the LIN bus traces away from switching converter inductors and keep them short and twisted with VBAT to meet ISO 7637-3 and IEC 55803-1 automotive EMC requirements. Connect the exposed thermal pad (pin 24 / centre paddle) to a continuous ground pour of at least 100 mm^2 to keep junction temperature below 150 C at peak 2.2 A bus drive. Decouple each LIN pin to ground with a reverse-biased ESD diode (e.g. PESD1LIN) within 5 mm of the connector.
Do not connect TXDx pins directly to a 5V UART when the MCU runs at 3.3V - use a 1 kohm/2 kohm resistive divider or logic-level translator to keep TXD below 3.3V. Do not exceed the maximum VBAT of 27 V continuous or 40 V transient; sustained over-voltage can damage the internal regulator. When only one dual block is used, leave the unused TXD/RXD/EN/WAKE/LIN pins tied to known states per the datasheet (TXD low, EN high) to avoid floating-bus false wake-ups.
At continuous 2.2 A LIN bus drive the TJA1024HG may dissipate up to 1.5 W in worst-case short-circuit conditions; the DHVQFN-24 has theta_JA around 31 C/W on a 4-layer 2 oz JEDEC board. Estimated: with 100 mm^2 copper pour, junction temperature rise is roughly 31 C/W x 1.5 W = 46.5 C above ambient; ensure ambient stays below ~80 C so junction remains below 125 C. Add a thermal via array under the exposed pad for better heat spreading in high-ambient ECU locations.
معلومات الامتثال
AEC-Q100 qualified for automotive use; LIN 2.0/2.1/2.2/2.2A and SAE J2602 compliant per NXP datasheet. RoHS and REACH compliant per NXP product environmental compliance information.
