UJA1018TK - LIN System Basis Chip w/ LED Drivers | NXP
料号： UJA1018TK ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.21 | $221.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.65 | $1,650.00 |
UJA1018TK 概述
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.
直接替换替代料： UJA1018TK ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： UJA1018TK （相同外形与封装尺寸） ——差异在于 Integrated Voltage Regulator, Package, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
UJA1018TK,118
✅ 直接替换✓ 有现货
$1.55 / 个
查看数据手册 →UJA1018TK 最大额定值与电气特性
| 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 |
| 引脚数 | 16 |
| 封装 | HVSON-16 (SOT1308-1) 3.5x5.5 mm with exposed pad |
| 安装类型 | Surface Mount |
| 电源电压 | 12 V nominal (automotive battery) |
| 电源电流 | 4.5 mA (typical, active mode) |
| 工作温度范围 | -40C to +150C |
| AEC-Q100 Screening | Automotive qualified |
| ESD Protection | Robust against automotive transients |
| Termination Form | No-lead (HVSON) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
UJA1018TK 引脚配置
| 引脚 1 | LIN — LIN bus line (transceiver input/output) |
| 引脚 2 | VBAT — Battery supply input (12 V automotive) |
| 引脚 3 | GND — Ground reference |
| 引脚 4 | VCC — 5.0 V regulator output (up to 70 mA) |
| 引脚 5 | WAKE — Wake-up input |
| 引脚 6 | RST — Reset output to external MCU |
| 引脚 7 | TXD — Transmit data input from MCU |
| 引脚 8 | RXD — Received data output to MCU |
| 引脚 9 | INH — Inhibit / power management control |
| 引脚 10 | EN — Enable for regulator / LED drivers |
| 引脚 11 | LED1 — LED driver output 1 |
| 引脚 12 | LED2 — LED driver output 2 |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | EP — Exposed thermal pad - solder to PCB ground land |
典型应用
UJA1018TK 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： UJA1018TK ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated 5V/70 mA LDO regulator （对比 TJA1028)
- On-chip LED driver outputs （对比 TLE7259-3)
- Daisy-chained LIN switch for node addressing （对比 Discrete LIN solution)
设计说明
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.
合规信息
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.
