TJA1145ATK - CAN FD Partial Networking Transceiver | NXP
MPN: TJA1145ATK β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.3 | $230.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
TJA1145ATK Overview
A CAN transceiver is the physical-layer device that converts the digital TXD/RXD signals of a CAN protocol controller into the differential signals on the two-wire CAN bus (CANH/CANL). Within the vehicle network hierarchy, it sits between the microcontroller's CAN controller and the bus wiring, and in partial-networking systems it also acts as a gatekeeper that wakes sleeping ECUs only when relevant messages appear.
Key features of the TJA1145A family include very low power consumption in Standby and Sleep modes, a selective wake-up function that filters bus traffic so only qualifying CAN frames trigger a wake, and an integrated system-basis-chip style feature set covering INH, WAKE and reset supervision. Operating modes span Normal, Standby, Sleep, Off and Overtemp, giving designers deterministic power-state control.
Technically, the transceiver provides differential transmit and receive capability for both classical CAN and CAN FD data frames up to 5 Mbps, with driver and receiver stages designed to meet the signaling symmetry and receiver timing requirements of ISO 11898-2:2016. The exposed-pad HVSON-14 package provides low loop inductance and a thermal path for the ground reference, supporting the tight bit-timing margins demanded by CAN FD arbitration and data phases.
Typical applications include automotive body control modules, gateways, air-conditioning and door ECUs, and battery management nodes - anywhere a low-duty-cycle ECU must remain mostly asleep yet wake on specific bus frames. Selective wake dramatically cuts quiescent current in vehicles with large CAN clusters.
Design consideration: the device is powered from VCC with I/O level adaptation via VIO, so level compatibility with 3.3 V and 5 V microcontrollers must be confirmed against the datasheet electrical characteristics before finalizing the interface.
This page synthesizes distributor data, family cross-references, and practical design notes beyond the bare manufacturer datasheet, following verified web sources as of 2026-09-13.
Drop-in alternatives for TJA1145ATK β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TJA1145ATK/FD/0Z
β Drop-Inπ Reference alternative (not in catalog)
TJA1145AT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TJA1145AT/0Z
β Drop-Inπ Reference alternative (not in catalog)
TJA1145TK
β Drop-Inπ Reference alternative (not in catalog)
TJA1128HTK/0Z
β Drop-Inπ Reference alternative (not in catalog)
TJA1145ATK Specifications
| Function | High-speed CAN transceiver with partial networking |
| Data Rate | 5 Mbps (CAN FD capable) |
| Standards Compliance | ISO 11898-2:2016 |
| Operating Modes | Normal, Sleep, Standby, Off, Overtemp |
| Selective Wake-up | Yes (CAN frame filtering wake) |
| Supply Voltage VCC | 5 V nominal |
| Package | 14-HVSON (3x4.5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant (per distributor listing) |
| Transceiver Channels | 1/1 (Transceiver/Receiver) |
TJA1145ATK 14-hvson (3x4.5 mm) with exposed pad Pin Configuration Guide
Pin configuration for TJA1145ATK (14-hvson (3x4.5 mm) with exposed pad package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TJA1145ATK.
Refer to the datasheet for full pin configuration.
Typical Applications
TJA1145ATK is suitable for 6 applications: Automotive Body Control Module, Gateway ECU, Battery Management System Node, HVAC and Climate Control ECU, ADAS Sensor Node, Industrial CAN Networks.
Automotive Body Control Module
Body control modules (BCMs) manage lighting, door locks, wipers and window lifters across a distributed CAN network, spending most of their life in parked-vehicle sleep. The TJA1145ATK fits because its selective wake-up filters bus traffic in Sleep mode, waking the ECU only on qualifying CAN frames per ISO 11898-2:2016, and its very low Standby/Sleep current keeps the vehicle's total quiescent draw within budget. The transceiver sits between the BCM microcontroller and the two-wire bus, with VIO allowing 3.3 V host interfaces. The 5 V, 14-HVSON exposed-pad package supports the EMC and thermal requirements of in-vehicle nodes.
Recommended
Gateway ECU
In-vehicle gateways route frames between multiple CAN/CAN FD and Ethernet domains, so their transceivers must sustain CAN FD data phases up to 5 Mbps with tight bit-timing symmetry. The TJA1145ATK provides differential transmit/receive per ISO 11898-2:2016 and is designed by NXP explicitly for high-speed CAN and CAN FD applications in the automotive industry. Its partial-networking support lets gateway branches keep sleeping sub-nets powered down. The 14-HVSON (3x4.5 mm) exposed-pad package minimizes loop inductance on the CANH/CANL lines, which directly reduces emissions at 2-5 Mbps data-phase edge rates.
Recommended
Battery Management System Node
Battery management system (BMS) slave nodes in EV packs communicate over CAN but must consume near-zero current when the vehicle is off. The TJA1145ATK addresses this directly: its Sleep-mode consumption is specified as very low in the NXP datasheet, and selective wake-up ensures the node wakes only on battery-relevant messages, not bus noise. The transceiver bridges the pack controller to the vehicle CAN bus with 5 Mbps CAN FD-capable signaling for fast cell-data bursts. The AEC-Q100 qualification and 14-HVSON exposed-pad package meet the vibration and thermal demands of under-floor and engine-bay mounting locations.
Recommended
HVAC and Climate Control ECU
Air-conditioning and climate-control units are classic partial-networking loads: they sleep during parking and wake for pre-conditioning commands. The TJA1145ATK's selective wake-up function (frame-based filtering per the NXP datasheet) means the HVAC microcontroller can be fully powered down while the transceiver listens, cutting standby current dramatically versus a conventional transceiver that wakes on every bus edge. Its ISO 11898-2:2016 compliant driver supports standard CAN command traffic, and the 5 V VCC / adjustable-VIO design interfaces cleanly with 3.3 V climate controllers. The compact 3x4.5 mm HVSON fits dense HVAC actuator PCBs.
Recommended
ADAS Sensor Node
ADAS sensors such as radar and camera modules increasingly use CAN FD to move calibration and status data at higher data-phase rates. The TJA1145ATK supports 5 Mbps signaling and is designed for high-speed CAN and CAN FD applications per NXP, with the signal symmetry needed for reliable arbitration and data phases. Partial-networking support allows non-critical ADAS branches to sleep between activation events. The 14-HVSON (3x4.5 mm) package with exposed pad provides the low-inductance ground reference needed to keep EMC at 2-5 Mbps edge rates within CISPR-class limits in sensor housings near antennas.
Recommended
Industrial CAN Networks
Although the TJA1145ATK is automotive-qualified (AEC-Q100), its ISO 11898-2:2016 compliance and 5 Mbps CAN FD capability also serve industrial CANopen and CAN FD backbones, where selective wake reduces power in battery-powered nodes such as mobile machinery and telemetry units. The transceiver provides the differential interface between any CAN protocol controller and the two-wire bus, and the Off mode fully disconnects the node from the bus for maintenance states. The 14-HVSON (3x4.5 mm) exposed-pad package soldered to a ground pour gives robust bus-fault and EMC performance in electrically noisy industrial cabinets.
Recommended
Recommended Products Summary
Engineering reference data for TJA1145ATK β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1145ATK/FD/0Z | TJA1145AT/0Z | TJA1145TK | TJA1128HTK/0Z |
|---|---|---|---|---|---|
| Package | 14-HVSON (3x4.5 mm) EP | 14-HVSON (3x4.5 mm) - same | 14-HVSON (3x4.5 mm) - same family | 14-HVSON (3x4.5 mm) - same family | 14-HVSON - same family footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 (family) | AEC-Q100 |
Key Differentiators
- Selective wake-up for CAN partial networking (vs TJA1051)
- CAN FD data-phase support to 5 Mbps (vs TJA1145TK)
- Integrated mode control (Normal/Sleep/Standby/Off/Overtemp) (vs TCAN1145-Q1)
Design Notes
The TJA1145ATK 14-HVSON (3x4.5 mm) package has an exposed pad that must be soldered to a solid ground pour. Follow NXP's recommended HVSON footprint in the datasheet: use an array of thermal vias under the pad (typically 3x3 or more, 0.3 mm drill, filled or tented per assembly capability) to connect to inner ground planes. This pad carries the transceiver's ground return for the CAN driver; a poor connection raises ground bounce on CANH/CANL and degrades both EMC emissions and receiver symmetry, especially at CAN FD data-phase rates.
The TJA1145A family is register-based: wake-up filters, mode transitions and event flags are configured over the serial interface, not hardwired pins. A common pitfall is powering up with default register values and expecting selective wake behavior - the wake pattern configuration must be written before entering Sleep, per the NXP TJA1145 datasheet configuration procedure. Also confirm VIO matches the host MCU I/O voltage; driving control inputs above VIO+maximum can stress the I/O structures. Always verify the suffix ordering option matches your required CAN FD grade.
Keep CANH and CANL as a tightly coupled differential pair from the transceiver pins to the common-mode choke and bus connector; symmetrical routing preserves the driver's low-emission behavior specified under ISO 11898-2:2016. Place the split/termination network close to the transceiver per the NXP application note topology, and route TXD/RXD away from switching regulator nodes. Because the part supports 5 Mbps CAN FD data phases, edge-rate-related emissions increase at short bit times - verify radiated emissions with the final harness, not just bench wiring.
Compliance Information
AEC-Q100 automotive qualification per Arrow product listing. RoHS compliant per distributor listing. REACH, lead-free and halogen-free status not stated in provided data - verify via NXP material declarations.
