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NXP Semiconductors UJA1169LTKZ
- Part No.:
- UJA1169LTKZ
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 20-VFDFN Exposed Pad
- Datasheet:
-
UJA1169LTKZ.pdf
- Description:
- IC INTFACE SPECIALIZED 20HVSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,226
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Product details
Overview
UJA1169LTKZ from NXP Semiconductors is a mini high-speed CAN companion System Basis Chip (SBC) designed for automotive applications requiring secondary power and communication resources. It integrates an ISO 11898-2:201x/ISO 11898-6:2013-compliant HS-CAN transceiver, a scalable 5 V/250 mA regulator (V1), SPI interface, watchdog with Window/Timeout/Autonomous modes, and LIMP output for ASIL-related limp-home signaling. It operates in Standby/Sleep modes with bus and local wake-up capability and supports CAN FD-passive partial networking.
For engineers reviewing the UJA1169LTKZ datasheet, UJA1169LTKZ pinout, UJA1169LTKZ application, or UJA1169LTKZ equivalent, key selection considerations include its dedicated VIO input for cross-supply-domain interfacing, thermal-scalable V1 regulator using external PNP, autonomous bus biasing, ±8 kV HBM ESD on CAN pins, and HVSON20 package with exposed die pad for enhanced thermal performance.
Technical Context
The UJA1169LTKZ implements a dual-regulator architecture: V1 (5 V/250 mA) supplies external loads and the internal CAN transceiver, while its variant-specific V2 (UJA1169LTK/UJA1169LTK/F) or VEXT (UJA1169LTK/X/UJA1169LTK/X/F) provides isolated 5 V/100 mA outputs. Its CAN transceiver supports classic CAN up to 1 Mbit/s and CAN FD fast-phase data rates up to 2 Mbit/s with loop-delay symmetry compliance per upcoming ISO 11898-2:201x.
Power management includes three hierarchical states: Normal (full functionality), Standby (V1 active, SPI enabled, transceiver offline), and Sleep (V1 off, SPI disabled, autonomous bus biasing active). Wake-up sources include standard CAN pattern detection, ISO 11898-6 selective frames (FD-passive only in /F variants), and local WAKE pin - all with source identification via RXD assertion and status registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CAN Compliance | ISO 11898-2:201x & ISO 11898-6:2013; enables interoperability with legacy and CAN FD networks without bus errors during FD traffic |
| V1 Regulator Output | 5 V ±2 %, 250 mA; supports thermal scaling via external PNP transistor and remains functional down to 2 V battery input |
| Quiescent Current | <20 µA in Sleep mode; enables long-term vehicle battery preservation during extended parking |
| ESD Protection | ±8 kV HBM on CANH/CANL; meets automotive robustness requirements for in-vehicle harness exposure |
| Package | HVSON20 (3.5 mm × 5.5 mm, 0.85 mm height); leadless, halogen-free, RoHS-compliant with exposed die pad for PCB thermal grounding |
| Watchdog Flexibility | Selectable 8 ms–4 s timeout period; Window mode (Normal only), Timeout mode (cyclic wake-up capable), Autonomous mode (mode-aware activation) |
| LIMP Output | Open-drain, active-low; asserts on overtemperature or watchdog failure, configurable via non-volatile memory for ASIL-critical fail-safe signaling |
Pinout & Package
HVSON20 package (3.5 mm × 5.5 mm, 0.85 mm height) with exposed die pad connected to GND for thermal and electrical performance. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise sequence starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 16, 19) | Ground reference | Four dedicated ground connections reduce impedance and improve noise immunity across analog/digital domains |
| V1 (Pin 5) | Main application supply output | 5 V/250 mA regulated output; powers external transceivers, sensors, or logic; undervoltage detect thresholds configurable in NV memory |
| VIO (Pin 6) | I/O level shifter supply | Accepts 3.3 V–5 V inputs; enables direct interfacing with diverse microcontrollers without external level shifters |
| RXD (Pin 8) | CAN receive data & wake-up indicator | Reflects bus state; driven LOW on any enabled wake-up event (CAN/WAKE/OTW) for immediate MCU interrupt recognition |
| LIMP (Pin 11) | Fault signaling output | Open-drain, active-low; asserts on overtemperature or watchdog failure; configurable activation threshold via NV memory |
| WAKE (Pin 12) | Local wake-up input | Active-high edge-triggered; initiates wake-up from Sleep/Standby without CAN bus activity |
| BAT (Pin 14) | Battery supply input | Input range 4.5 V–27 V; protected against ISO 7637-3 transients and reverse battery conditions |
| CANL / CANH (Pins 17–18) | CAN physical layer interface | Differential bus lines; short-circuit proof to ±58 V; floating when BAT = 0 V for safe hot-plug operation |
| SCSN (Pin 20) | SPI chip select | Active-low; enables multi-device SPI daisy-chaining and reduces MCU GPIO usage |
Key Features
| Feature | Design Value |
|---|---|
| CAN FD-passive partial networking | Enables Sleep-mode retention during CAN FD traffic-eliminates false wake-ups and preserves battery life in mixed CAN/CAN FD networks |
| VIO supply domain isolation | Allows seamless integration with main SBCs operating at different I/O voltages (3.3 V or 5 V), preventing reverse current flow and supply domain conflicts |
| Thermal-scalable V1 regulator | External PNP transistor support enables dynamic thermal derating; VEXCC/VEXCTRL pins provide precise current sensing and base control |
| Configurable limp-home behavior | Non-volatile memory stores LIMP activation thresholds and fault response logic-ensures consistent safety-critical behavior across production units |
| Autonomous bus biasing | Maintains ISO 11898-6-compliant common-mode voltage (≈2.5 V active, GND-biased idle) without external components-reduces BOM count and layout complexity |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Secondary CAN node managing door modules, seat controls, and lighting subsystems alongside primary ECU. IC Role / Device Role / Timing Role: Companion SBC providing isolated 5 V power and HS-CAN interface; handles wake-up arbitration and limp-home signaling during faults. Use Value: Eliminates need for discrete regulators and level shifters; VIO pin ensures compatibility with 3.3 V ADAS MCUs while V1 powers multiple LIN transceivers. | Use Scenario: Distributed sensor hub connecting radar, camera, and ultrasonic modules to central domain controller. IC Role / Device Role / Timing Role: CAN companion enabling partial networking-keeps radar online while cameras sleep during low-activity periods. Use Value: CAN FD-passive mode prevents spurious wake-ups from high-speed radar data bursts, extending system standby time by >40% vs. legacy SBCs. |
| Electric Power Steering (EPS) | Infotainment Gateway |
Use Scenario: Redundant safety path for EPS motor control, monitoring torque sensor and motor driver status via dedicated CAN channel. IC Role / Device Role / Timing Role: Fault-tolerant SBC delivering independent watchdog supervision and LIMP output to chassis controller upon overtemperature or communication loss. Use Value: Dual watchdog modes (Window + Timeout) meet ASIL-B requirements; LIMP signal triggers mechanical fallback without software intervention. | Use Scenario: Bridging infotainment head unit to instrument cluster and telematics via secondary CAN bus. IC Role / Device Role / Timing Role: Scalable power provider (V1 + VEXT) supplying 5 V to display drivers and CAN transceivers while isolating domains via VIO. Use Value: VEXT short-circuit protection to −18 V prevents damage from accidental reverse polarity during service; supports hot-swap diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN companion SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UJA1169LTK/F | Includes ISO 11898-6 partial networking and CAN FD-passive; same HVSON20 package and pinout | Required where selective wake-up from CAN FD traffic is mandatory; supports mixed CAN/CAN FD network topologies | Select UJA1169LTK/F if your design requires guaranteed Sleep-mode retention during CAN FD communication |
| TJA1145A | Single 5 V/250 mA regulator only; no V2/VEXT option; lacks autonomous bus biasing and VIO pin | Suitable for cost-sensitive single-regulator applications without cross-domain interfacing needs | Choose TJA1145A only when VIO isolation and dual-regulator flexibility are unnecessary and BOM simplification is prioritized |
Compared with UJA1169LTKZ, UJA1169LTK/F adds certified partial networking capability for CAN FD environments, while TJA1145A reduces feature set to lower cost but sacrifices VIO domain adaptation, autonomous biasing, and flexible power routing-making UJA1169LTKZ optimal for scalable, safety-critical automotive architectures.
Availability
UJA1169LTKZ is available at Aetrix Electronics and suitable for body control modules, ADAS sensor hubs, electric power steering systems, and infotainment gateways requiring stable component supply, automotive-grade reliability, and long lifecycle support.
Supply support for UJA1169LTKZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in CAN, SBC, and functional safety technologies.
The UJA1169L product line delivers companion SBCs optimized for modular automotive ECUs-enabling scalable power distribution, robust CAN communication, and ASIL-aware fault handling in distributed electronic architectures.
FAQ
What is the maximum CAN data rate supported by the UJA1169LTKZ?
The UJA1169LTKZ supports classic CAN up to 1 Mbit/s and CAN FD fast-phase data rates up to 2 Mbit/s. This capability is enabled by loop-delay symmetry compliance per upcoming ISO 11898-2:201x, ensuring reliable communication during high-speed data field transmission without introducing timing violations or bus errors in the UJA1169LTKZ implementation.
Does the UJA1169LTKZ support partial networking, and how does it differ from standard wake-up?
The UJA1169LTKZ supports ISO 11898-6:2013-compliant partial networking with CAN FD-passive functionality. Unlike standard wake-up-which triggers on any bus activity-the UJA1169LTKZ ignores CAN FD traffic in Sleep/Standby mode, allowing nodes that do not require FD messages to remain asleep. This prevents unnecessary wake-ups and extends battery life in mixed-protocol networks where the UJA1169LTKZ serves as a companion SBC.
How does the VIO pin on the UJA1169LTKZ enable interoperability with different microcontrollers?
The VIO pin on the UJA1169LTKZ accepts 3.3 V to 5 V supply inputs, enabling direct level-shifting between the SBC's SPI interface and microcontrollers operating at different I/O voltages. This eliminates external level shifters and prevents reverse current flow between supply domains-a critical advantage when the UJA1169LTKZ acts as a secondary SBC alongside a main SBC with mismatched VIO rails, ensuring robust communication and power integrity.
What thermal management features does the UJA1169LTKZ offer for the V1 regulator?
The UJA1169LTKZ implements thermal scalability for its V1 regulator via external PNP transistor control using VEXCTRL (base drive) and VEXCC (collector current sense) pins. This allows dynamic thermal derating based on PCB layout and ambient conditions. Combined with the HVSON20 package's exposed die pad (to be connected to GND), the UJA1169LTKZ achieves low thermal resistance and maintains regulation stability under sustained 250 mA load at elevated temperatures.
Can the UJA1169LTKZ operate with battery voltages below 5 V, and what is its minimum functional input?
Yes, the UJA1169LTKZ can operate with battery input as low as 2 V while maintaining V1 regulator functionality. Its BAT pin accepts 4.5 V–27 V nominal input, but the internal circuitry-including V1 regulation and wake-up detection-is designed to function down to 2 V. This ensures reliable operation during cold-cranking events and supports fail-safe behavior in low-voltage scenarios critical for automotive applications using the UJA1169LTKZ.
UJA1169LTKZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- System Basis Chip
- Interface:
- CAN
- Voltage - Supply:
- 5V
- Supplier Device Package:
- 20-HVSON (3.5x5.5)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
UJA1169LTKZ FAQ
1.How can I place an order for UJA1169LTKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for UJA1169LTKZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UJA1169LTKZ reliable?
The price and inventory of UJA1169LTKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UJA1169LTKZ is usually 5 days.
3.What payment methods are accepted for UJA1169LTKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UJA1169LTKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UJA1169LTKZ?
UJA1169LTKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UJA1169LTKZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UJA1169LTKZ?
For technical support, including UJA1169LTKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UJA1169LTKZ requirements.
6.How does Aetrix verify that UJA1169LTKZ is sourced from the original manufacturer or authorized distributors?
All UJA1169LTKZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UJA1169LTKZ meets industry standards.
7.What is the process for return or replacement of UJA1169LTKZ?
All UJA1169LTKZ units undergo pre-shipment inspection (PSI). If there is an issue with UJA1169LTKZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UJA1169LTKZ part is unused and in its original packaging.
Return procedure for UJA1169LTKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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