TJA1145ATK-0Z - CAN Transceiver Partial Networking | NXP
MPN: TJA1145ATK-0Z β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.46 | $246.00 |
| 500 | $2.12 | $1,060.00 |
| 1,000 | $1.85 | $1,850.00 |
TJA1145ATK-0Z Overview
A CAN (Controller Area Network) transceiver is a physical-layer interface IC that converts the single-ended TX and RX logic signals of a microcontroller's CAN controller into the differential signaling required on the twisted-pair CAN bus. Within the vehicle networking hierarchy, it sits between the protocol controller and the bus line, and belongs to the broader family of line drivers, receivers, and transceivers used in in-vehicle networking.
Key features of the TJA1145ATK/0Z include support for CAN FD frames at data rates up to 5 Mbps, multiple operating modes (Normal, Standby, Sleep, Off, and Overtemp protection), and partial networking support that allows selectively woken ECUs on a partially networked bus via the dedicated WAKE pin and INH output. The device is AEC-Q100 qualified for automotive applications and supplied in tape and reel packaging.
Technically, the transceiver provides differential transmit and receive capability to a microcontroller over the two-wire CAN bus, with integrated bus-side protection and an inhibit function (pin INH) that controls the external voltage regulator during low-power modes. In Off mode the CAN pins and pin INH are in a high-ohmic state, and above the power-on threshold Vth(det)pon the device boots up and enters Standby mode after tstartup, per the NXP TJA1145A datasheet.
Typical applications include automotive body control modules, gateway ECUs handling partial networking wake/sleep distribution, tire pressure monitoring and battery management nodes, and any CAN FD node in vehicles requiring selective wake-up to reduce overall system current consumption.
Designers should observe the 5V VCC supply requirement and ensure the mode sequencing (Standby to Normal transitions) matches the wake pattern configuration, as incorrect wake filter settings can prevent selective wake-up in partial networking systems.
This page synthesizes distributor availability data, drop-in alternatives, and practical partial-networking design considerations not consolidated on the manufacturer product page.
Drop-in alternatives for TJA1145ATK-0Z 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
β Drop-Inβ In Stock
$1.82 / Unit
View Datasheet βTJA1145ATK/FD/0Z
β Drop-Inπ Reference alternative (not in catalog)
TJA1128HTK/0Z
β Drop-Inπ Reference alternative (not in catalog)
TJA1145AT/0Z
β Drop-Inπ Reference alternative (not in catalog)
TLE9250
β Drop-Inπ Reference alternative (not in catalog)
TJA1145ATK-0Z Specifications
| Product Type | High-speed CAN transceiver for partial networking |
| Interface | CANbus |
| Transceiver Configuration | 1 driver / 1 receiver |
| Data Rate | 5 Mbps |
| Supply Voltage | 5 V |
| Operating Modes | Normal / Sleep / Standby / Off / Overtemp |
| Partial Networking | Yes (selective wake-up with INH output and WAKE pin) |
| Automotive Qualification | AEC-Q100 |
| Package | 14-HVSON (3x4.5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
TJA1145ATK-0Z 14-hvson (3x4.5 mm) with exposed pad Pin Configuration Guide
Pin configuration for TJA1145ATK-0Z (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-0Z.
Refer to the datasheet for full pin configuration.
Typical Applications
TJA1145ATK-0Z is suitable for 6 applications: Automotive Gateway ECUs, Body Control Modules, Battery Management Systems, Tire Pressure Monitoring and Sensor Nodes, Industrial CAN Networks, CAN FD Test and Diagnostic Tools.
Automotive Gateway ECUs
Gateway electronic control units bridge multiple CAN and CAN FD networks in a vehicle and must manage selective wake-up across partially networked segments. The TJA1145ATK-0Z fits this role with 5 Mbps CAN FD support and integrated partial-networking logic: the WAKE pin and INH output let the gateway power down most of the node and re-power only when a valid wake pattern arrives on the bus. Placed between the microcontroller's CAN controller and the twisted-pair bus with a 5V VCC rail, it keeps sleep current at the node level minimal because in Off mode the CAN pins and INH are high-ohmic. The trade-off versus a plain transceiver is added configuration complexity for wake filters, but the system-level current savings in parked-vehicle conditions are substantial.
Recommended
Body Control Modules
Body control modules (BCMs) drive lighting, door, and access functions and spend most of their life in low-power sleep, waking only for commanded activity - exactly the partial-networking scenario the TJA1145ATK-0Z targets. Its Normal/Sleep/Standby/Off/Overtemp mode set maps directly to BCM power states: the transceiver monitors the bus in Standby, triggers wake via the WAKE/INH mechanism when a valid CAN wake-up pattern is detected, and the INH pin then enables the module's main regulator. With AEC-Q100 qualification and a compact 3x4.5 mm HVSON-14 exposed-pad package, it suits the dense PCBs typical of BCMs. The design consideration is ensuring the power-on threshold Vth(det)pon behavior aligns with the BCM's battery-line supervision during cranking transients.
Recommended
Battery Management Systems
In EV and 12V battery management systems, nodes must report status over CAN FD yet draw near-zero quiescent current when the vehicle is off. The TJA1145ATK-0Z addresses this with its Off mode, in which the CAN pins and INH are high-ohmic, and with partial-networking wake-up that re-enables the node only on addressed wake frames. Data rates up to 5 Mbps support the fast cell-data polling cycles of modern BMS networks. The 5V-supplied transceiver interfaces to the BMS microcontroller through standard TXD/RXD logic, and the HVSON-14 exposed pad provides solid ground connection for bus-signal integrity. Engineering attention should go to transient immunity on the battery-fed VBAT line and to sequencing the INH-controlled supply so the MCU boots cleanly after tstartup.
Recommended
Tire Pressure Monitoring and Sensor Nodes
Sensor nodes such as tire-pressure modules and distributed automotive sensors benefit from waking only when addressed, conserving battery or harvested energy. The TJA1145ATK-0Z's selective wake feature means the microcontroller can remain fully powered down while the transceiver filters CAN traffic; only a matching wake-up pattern activates the INH output and restores node power. Its 5 Mbps capability accommodates short, high-speed burst reporting typical of sensor data frames under CAN FD. The small 14-pin HVSON (3x4.5 mm) footprint fits compact sensor PCBs. Designers must configure the wake filter timing correctly, since overly narrow filters can miss legitimate wake frames while overly wide ones wake the node on unrelated bus traffic, defeating the power-saving objective of the partial network.
Recommended
Industrial CAN Networks
Beyond automotive, the TJA1145ATK-0Z serves industrial CAN and CAN FD fieldbus nodes - drives, I/O modules, and automation controllers - where the AEC-Q100 qualification simply adds robustness margin in harsh electrical environments. The 5 Mbps data rate supports CAN FD arbitration plus data-phase configurations common in modern industrial networks, and differential transmit/receive capability over the two-wire bus provides the noise immunity required near motor drives and switching equipment. Mode control (Standby/Normal) allows power-managed nodes to drop the transceiver to a low-power listening state between communication windows. Layout practice - a tight, matched CANH/CANL pair with the exposed pad grounded - and the device's Overtemp mode protection together support reliable operation on long industrial bus segments.
Recommended
CAN FD Test and Diagnostic Tools
Diagnostic interfaces, CAN FD-to-USB bridges, and fleet test equipment need a transceiver that handles both legacy classical CAN traffic and 5 Mbps FD data phases; the TJA1145ATK-0Z covers both on one silicon die. Its Normal mode provides full-speed differential signaling while Overtemp mode protects the tool during long capture sessions with heavy bus loading. Because the part is the same transceiver family used in production ECUs, test adapters built around it reproduce in-vehicle bus behavior closely, improving correlation between bench and road results. Engineers building such tools should add bus-side termination switching and transient protection (TVS diodes on CANH/CANL), and verify that tool sleep/wake logic exercises the WAKE and INH pins to emulate partial-networking ECUs faithfully during HIL testing.
Recommended
Recommended Products Summary
Engineering reference data for TJA1145ATK-0Z β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1145ATK | TJA1145ATK/FD/0Z | TJA1128HTK/0Z | TLE9250 |
|---|---|---|---|---|---|
| Package | 14-HVSON (3x4.5 mm) EP | 14-HVSON (3x4.5 mm) - same | 14-HVSON (3x4.5 mm) - same | 14-HVSON - same family | 14-pin leadless (verify footprint) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon |
| AEC-Q100 Qualification | Qualified | Qualified | Qualified | Qualified (automotive family) | Automotive grade |
Key Differentiators
- Integrated partial networking with selective wake (vs TCAN1042)
- CAN FD support up to 5 Mbps in the same footprint (vs TJA1145ATK/FD/0Z)
- AEC-Q100 qualification with Overtemp mode (vs TJA1128HTK/0Z)
Design Notes
The TJA1145ATK-0Z requires a 5V supply on VCC; in partial-networking designs this rail is typically controlled via the transceiver's INH output through an external automotive LDO or discrete regulator. Sequence the system so the MCU VIO rail is present before Normal mode is commanded. In Off mode the CAN pins and INH are high-ohmic (per NXP TJA1145A datasheet), so confirm no leakage path through the termination network pulls the sleeping bus below the differential recessive thresholds of remaining active nodes.
Per the datasheet, above the power-on threshold Vth(det)pon the TJA1145A boots and enters Standby mode after tstartup. During battery-line transients (cranking, load dump) the supply can cross this threshold repeatedly; add adequate input filtering and verify the MCU wake-handling firmware tolerates repeated initialization cycles. Also configure wake-pattern filters per your network specification - a common field failure is a node that never wakes because the frame format filter excludes the gateway's wake message.
Use the HVSON-14 exposed pad as the primary ground connection - solder it to a via-stitched ground pour for thermal dissipation and bus-signal reference. Keep CANH and CANL as a matched pair routed away from switching noise sources, place the recommended split termination (typically two equal resistors with a capacitor to ground at the split point) at the node if it is a bus endpoint, and add TVS protection rated for automotive transients on both bus lines close to the connector.
Compliance Information
AEC-Q100 qualification confirmed via Arrow product listing. The /0Z suffix denotes NXP's standard compliance option; formal RoHS/REACH certificates should be downloaded from the NXP TJA1145ATK product page (nxp.com/part/TJA1145ATK).
