UJA1018TK - LIN System Basis Chip w/ LED Drivers | NXP
MPN: UJA1018TK ✓ Hoạt độngUJA1018TK Tóm tắt
A LIN system basis chip is a class of mixed-signal interface IC that integrates a bus transceiver with on-chip power management and support peripherals. By collapsing the transceiver, voltage regulator, and actuator drivers into a single die, an SBC reduces PCB area, lowers quiescent current, and provides a robust EMC/ESD front end for in-vehicle networks governed by the LIN/J2602 family of standards. The UJA1018TK sits within the automotive networking segment alongside CAN and FlexRay transceivers, and is commonly used as a body-control sub-node tying switches, sensors, and LEDs back to a central body control module.
Key features of the UJA1018TK include compliance with LIN 2.0/2.1/2.2 and SAE J2602, integrated 5.0 V low-drop regulator capable of delivering up to 70 mA to external loads, programmable LIN-bus slew rate for EMC control, and dedicated LED driver pins capable of sourcing the current required for indicator or status lamps. The device supports node-position identification through a daisy-chained LIN-switch path, allowing cost-effective address assignment in multi-node LIN chains.
The architecture combines a high-voltage analog front end tolerant of automotive 12 V transients with a low-power digital LIN protocol state machine. An integrated LIN bus switch enables address assignment without external EEPROM, while thermal shutdown, load-dump protection, and an exposed thermal pad enable AEC-Q100-style automotive operation across the -40C to +150C automotive temperature range. Supply current is typically around 4.5 mA in active mode, supporting always-on body networks.
Typical applications include automotive door modules, seat controllers, steering-column switches, sunroof and mirror modules, climate-control panels, and any LIN-attached mechatronic node that also needs to drive LEDs. Its 5 V regulator rail can directly supply a small microcontroller and sensing front-end.
When designing with the UJA1018TK, observe the recommended PCB layout for the HVSON exposed pad - a thermal land of at least 100 mm² of 1 oz copper is needed for sustained LED-driver currents. Decouple the regulator output with a 1 µF X7R ceramic placed within 3 mm of the VCC pin, and place the LIN bus termination and ESD protection within 10 mm of the LIN pin to meet IEC 61000-4-2 air-discharge ratings.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB/EMC design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho UJA1018TK — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với UJA1018TK (cùng hình factor và footprint) — khác nhau ở Integrated Voltage Regulator, Package, RoHS Status.
UJA1018TK,118
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Xem tài liệu →UJA1018TK Tỷ lệ tối đa & tính chất điện
| Device Type | LIN Bus Transceiver + Voltage Regulator + LED Drivers |
| Protocol | LIN 2.0 / 2.1 / 2.2 / SAE J2602 |
| Number of Transceivers | 1 |
| Integrated Voltage Regulator | 5.0 V LDO, up to 70 mA |
| Số lượng chân | 16 |
| Hộp | HVSON-16 (SOT1308-1) 3.5x5.5 mm with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Điện áp cung cấp | 12 V nominal (automotive battery) |
| Điện áp cung cấp | 4.5 mA (typical, active mode) |
| Khoảng nhiệt độ hoạt động | -40C to +150C |
| AEC-Q100 Screening | Automotive qualified |
| ESD Protection | Robust against automotive transients |
| Termination Form | No-lead (HVSON) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân UJA1018TK
| Chân 1 | LIN — LIN bus line (transceiver input/output) |
| Chân 2 | VBAT — Battery supply input (12 V automotive) |
| Chân 3 | GND — Ground reference |
| Chân 4 | VCC — 5.0 V regulator output (up to 70 mA) |
| Chân 5 | WAKE — Wake-up input |
| Chân 6 | RST — Reset output to external MCU |
| Chân 7 | TXD — Transmit data input from MCU |
| Chân 8 | RXD — Received data output to MCU |
| Chân 9 | INH — Inhibit / power management control |
| Chân 10 | EN — Enable for regulator / LED drivers |
| Chân 11 | LED1 — LED driver output 1 |
| Chân 12 | LED2 — LED driver output 2 |
| Chân 13 | NC — Not connected (per datasheet) |
| Chân 14 | NC — Not connected (per datasheet) |
| Chân 15 | NC — Not connected (per datasheet) |
| Chân 16 | EP — Exposed thermal pad - solder to PCB ground land |
Ứng dụng tiêu biểu
UJA1018TK phù hợp cho 6 Áp dụngs: Automotive Door Module (LIN SBC + LED), Steering Column Switch Cluster, LIN Sunroof and Roof Console Module, Automotive Seat Control Electronics, Climate Control / HVAC Panel Node, Body-Control Slave with LED Indicators.
Automotive Door Module (LIN SBC + LED)
Why UJA1018TK fits door modules: the integrated 5.0V/70mA LDO powers a small microcontroller that polls window switches, mirror actuators, and lock state, while the on-chip LED drivers feed status/indicator lamps without requiring an external LED driver. How it is used + performance consideration: the LIN bus acts as the tether to the central body-control module, the HVSON exposed pad dissipates the heat from sustained LED currents, and the -40C to +150C junction range handles under-dash cycling. Concrete parameters: 70 mA LDO, 4.5 mA active supply current, 16-pin HVSON.
Được đề xuất
Steering Column Switch Cluster
Why UJA1018TK fits column switches: the integrated LIN transceiver eliminates a discrete LIN phy, the 5V LDO supplies the switches' microcontroller, and the LED drivers drive backlit icons on the column stalks. How it is used + performance consideration: the part sits on a flex or rigid PCB behind the steering wheel, exposed to constant temperature swings, and the AEC-Q100 screening plus exposed thermal pad manage heat in a sealed housing. Concrete parameters: 16-pin HVSON, AEC-Q100, -40C to +150C.
Được đề xuất
LIN Sunroof and Roof Console Module
Why UJA1018TK fits sunroof modules: the integrated regulator and LED drivers remove the need for a separate 5V LDO and lamp driver chips, reducing board area in the cramped roof console. How it is used + performance consideration: the part bridges the LIN bus to the motor controller for sunroof actuation and indicator LEDs; exposed-pad HVSON supports passive thermal dissipation through the chassis ground plane. Concrete parameters: 70 mA LDO, 4.5 mA Iq, AEC-Q100.
Được đề xuất
Automotive Seat Control Electronics
Why UJA1018TK fits seat modules: the combined LIN transceiver + 5V LDO + LED driver triple reduces per-module BOM cost in seat-back and seat-side ECUs. How it is used + performance consideration: the device sits next to LIN-controlled seat motors and seat-occupancy sensors, sourcing LED current for seat-position indicators; the HVSON exposed pad must be soldered to a generous copper pour for sustained LED use. Concrete parameters: 16-pin HVSON 3.5x5.5 mm, 70 mA LDO.
Được đề xuất
Climate Control / HVAC Panel Node
Why UJA1018TK fits HVAC panels: the LIN bus links the head unit to a rear or distributed HVAC control, while the integrated 5V/70 mA rail powers the local microcontroller that drives LCD backlights and indicator LEDs. How it is used + performance consideration: a small S12 or Kinetis MCU handles user input and blower control; the UJA1018TK provides the LIN physical interface and a regulated 5V rail, eliminating two chips from the BOM. Concrete parameters: 70 mA LDO, LIN 2.x/J2602, 16-pin HVSON.
Được đề xuất
Body-Control Slave with LED Indicators
Why UJA1018TK fits generic LIN-attached body slaves: the integrated LED drivers and 5V LDO make it ideal for any compact module that needs both a regulated rail and indicator lamps, such as trunk release actuators, mirror adjusters, or lighting controllers. How it is used + performance consideration: the part handles bus-protocol physics plus power-supply duties; total system current is bounded by the 70 mA LDO and LED-driver current budget, all in a 16-pin footprint. Concrete parameters: LIN 2.x + J2602, 5V/70 mA, AEC-Q100.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho UJA1018TK — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | UJA1018TK,118 |
|---|---|---|
| Package | HVSON-16 (3.5x5.5 mm) | HVSON-16 (3.5x5.5 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Protocol | LIN 2.0/2.1/2.2 / SAE J2602 | LIN 2.0/2.1/2.2 / SAE J2602 |
| Integrated LDO | 5.0 V / 70 mA | 5.0 V / 70 mA |
| LED Drivers | Yes (on-chip) | Yes (on-chip) |
| Operating Temperature | -40C to +150C | -40C to +150C |
| Supply Current | 4.5 mA typical | 4.5 mA typical |
| Automotive Grade | AEC-Q100 qualified | AEC-Q100 qualified |
| Mounting | Surface Mount | Surface Mount |
Bảo phân biệt quan trọng
- Integrated 5V/70 mA LDO regulator (vsTJA1028)
- On-chip LED driver outputs (vsTLE7259-3)
- Daisy-chained LIN switch for node addressing (vsDiscrete LIN solution)
Ghi chú thiết kế
Estimated: at 12V VBAT supplying a 5V/70 mA LDO load and two LED drivers drawing up to 20 mA each at ~3V Vf from the LDO rail, internal dissipation is roughly (12V-5V)*0.07A + 2*(3V*0.02A) = 0.49 W + 0.12 W = 0.61 W. With a properly-soldered exposed-pad HVSON-16 thermal pad to ~100 mm² of 1 oz copper on a JEDEC EIA/JESD51 4-layer test board, the junction temperature rise stays well within the -40C to +150C rating.
Place the VBAT bypass capacitor (>= 100 nF X7R) within 5 mm of the VBAT pin, and the VCC output capacitor (1 uF X7R minimum, ceramic) within 3 mm of the VCC pin. Keep the LIN trace to the bus pin as short as possible to minimize EMI, and place external ESD/TVS protection within 10 mm of the LIN pad to meet IEC 61000-4-2 air-discharge rating for automotive interior use.
Do not load the integrated 5V LDO above 70 mA sustained - the regulator is sized for a microcontroller plus sensors, not for actuator coils. Drive motors and higher-current LEDs through a separate NXP TLE94110EL or comparable external half-bridge. Also, the UJA1018TK is NOT a drop-in for the TJA1028: the latter is a CAN/LIN transceiver without the on-chip 5V regulator or LED drivers, so the PCB has to be redesigned when migrating.
Thông tin tuân thủ
RoHS compliant per DigiKey listing. AEC-Q100 automotive qualified per NXP product page and Partstack description. Halogen-free status not explicitly stated in the verified data.
