TJA1044GTK/3Z - 1Mbit/s CAN Transceiver with Standby | NXP
MPN: TJA1044GTK/3Z ✓ AktifTJA1044GTK/3Z Genel Bakış
A CAN transceiver is the physical-layer interface between a CAN protocol controller inside a microcontroller and the differential two-wire CAN bus. It converts the controller's TXD logic signal into a balanced differential bus voltage and converts the received bus differential voltage back into an RXD logic signal for the controller. Within the electronics hierarchy, the TJA1044 sits below the CAN protocol controller, below the automotive communication network, and inside the broader class of bus interface transceivers.
Key features of the TJA1044GTK/3Z include 1 Mbit/s operation, a Vio supply pin supporting MCU I/O levels of 3.3 V to 5.0 V, a low-power standby mode with pattern-recognition wake-up, and strong bus robustness rated to 12 V. The part belongs to the NXP Mantis family of high-speed CAN transceivers, an optimized second generation of the TJA1040 and TJA1042 devices with markedly improved ElectroMagnetic Compatibility (EMC) behaviour for 12 V automotive systems.
Architecturally, the device separates the digital domain from the bus domain: Vio powers the logic-side RXD output so the transceiver can be paired directly with 3.3 V microcontrollers, while VCC powers the bus-side driver and receiver. The standby state drops the quiescent current to a very low level while an internal wake-up pattern detector monitors the bus, so a node can be woken remotely without a local microcontroller intervention.
Typical applications include automotive body control units, gateway and comfort modules, electric vehicle powertrain controllers, industrial automation controllers, and CAN-based sensor backbones. The small 3 x 3 mm HVSON footprint keeps the design compact, and the exposed thermal pad aids heat dissipation in space-constrained electronics.
Design consideration: the CAN bus lines CANH and CANL must be routed as a tightly coupled differential pair with a common-mode choke or split termination, and the transceiver ground must connect directly to the thermal pad for low-impedance return currents. Keep the node's 120 ohm termination resistor switchable if the design must support low-power sleep states.
Drop-in alternatifler için TJA1044GTK/3Z — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
TJA1044GTK/3
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
TJA1044GK/3
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
TJA1044GTK/3Z Özellikler
| Product Type | High-speed CAN transceiver (physical layer) |
| Veri Hızı | 1 Mbit/s |
| Transceiver Configuration | Half (1 TX / 1 RX) CAN transceiver |
| Number of Channels | 1 |
| MCU I/O Interface Voltage (Vio) | 3.3 V to 5.0 V |
| CAN Bus Robustness (max bus voltage) | 12 V |
| Standby / Low-Power Mode | Yes, standby mode with pattern-recognition wake-up |
| Wake-Up | Bus wake-up pattern detection |
| Product Family | NXP Mantis high-speed CAN transceiver family |
| Paket | 8-HVSON (SOT782-1), 3 x 3 mm |
| Montaj Türü | Surface mount |
| Application Class | Automotive grade, 12 V in-vehicle networks |
| EMC Performance | Optimized for 12 V automotive EMC requirements |
| Product Category | CAN FD / High-Speed CAN |
| Orderable Code Note | Z suffix on /3Z denotes sulfur barrier bag packaging option |
TJA1044GTK/3Z Pin Yapısı
| Pin 1 | Vio — Logic-side supply for the RXD output, supports 3.3 V to 5.0 V MCU interfacing |
| Pin 2 | RXD — Receive data output from the CAN bus |
| Pin 3 | nSTB — Standby control input, active low, used for low-power mode and bus wake-up |
| Pin 4 | VCC — Bus-side supply voltage |
| Pin 5 | TXD — Transmit data input from the CAN controller |
| Pin 6 | GND — Ground connection |
| Pin 7 | CANL — CAN bus low-side driver output |
| Pin 8 | CANH — CAN bus high-side driver output |
Tipik Uygulamalar
TJA1044GTK/3Z için uygundur 6 uygulamas: Automotive Body Control Unit CAN Interface, Vehicle Gateway and Domain Controller, Industrial Automation and PLC CAN Modules, CAN-Based Sensor and Actuator Backbone, Medical and Laboratory Instrument Communication, CAN Gateway with Redundant Bus Link.
Automotive Body Control Unit CAN Interface
The TJA1044GTK/3Z fits body control units that sit on the vehicle's main high-speed CAN backbone and must survive harsh 12 V automotive transients. With 1 Mbit/s capability it carries door, lighting, and climate control traffic, while the Vio pin at 3.3 V to 5.0 V lets the transceiver talk directly to a 3.3 V MCU without an external level shifter. Its standby mode and bus wake-up pattern detection allow the ECU to sleep at microamp-level quiescent current and be woken by a remote node, cutting parasitic drain on the vehicle battery. The 3 x 3 mm HVSON-8 footprint leaves board area for actuator drivers in the same enclosure.
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Vehicle Gateway and Domain Controller
Vehicle gateways aggregate several CAN segments into a single backbone, so the transceiver must be compact, low-power, and EMC-robust. The TJA1044GTK/3Z handles the 1 Mbit/s legacy CAN segment while its standby mode lets the gateway isolate an unused branch. Because the NXP Mantis family was engineered for improved EMC performance over the earlier TJA1040 and TJA1042 generations, it suits gateways positioned next to high-current loads and switching regulators. The exposed thermal pad of the HVSON-8 package provides a direct path for heat from sustained high-bus-activity operation into the board ground plane.
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Industrial Automation and PLC CAN Modules
Industrial controllers frequently use high-speed CAN for distributed I/O, drive feedback, and safety signalling. The TJA1044GTK/3Z provides 1 Mbit/s throughput with 12 V bus robustness, which covers 24 V industrial environments that use resistive dividers or isolated supplies on the bus. The standby function and pattern-recognition wake-up let a remote I/O node remain asleep until the master broadcasts, reducing current draw across a large installation. Its small HVSON-8 footprint fits tightly packed DIN-rail carrier boards where an SO8 package would consume scarce board area.
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CAN-Based Sensor and Actuator Backbone
Sensor hubs and actuator controllers distributed along a machine often share a single CAN bus and must maintain deterministic communication. The TJA1044GTK/3Z sustains 1 Mbit/s while adding the Vio domain needed to interface with modern 3.3 V microcontrollers used in compact sensing nodes. Because the HVSON-8 package exposes its pad for grounding, it can be placed close to the bus connector, keeping the differential CANH and CANL route short and reducing radiated emissions in a cabinet full of switching converters. Wake-up pattern detection supports remote reactivation of sleeping nodes.
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Medical and Laboratory Instrument Communication
Diagnostic instruments, analysers, and laboratory automation cells frequently use CAN to isolate motion and sensor subsystems from the main controller. The TJA1044GTK/3Z's 1 Mbit/s rate, 12 V bus robustness, and standby mode suit long cable runs in equipment where galvanic isolation is handled upstream. Its small 3 x 3 mm HVSON-8 package fits inside compact instrument chassis without crowding the analogue front end, and the low quiescent current in standby limits thermal rise inside sealed enclosures. The TJA1044's EMC-optimised design reduces the risk of the transceiver disturbing sensitive analogue measurement channels in the same box.
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CAN Gateway with Redundant Bus Link
Redundant CAN links in test benches, robotics cells, and energy-storage controllers need two independent transceivers per node. Two TJA1044GTK/3Z devices fit on a small board thanks to the 3 x 3 mm HVSON-8 outline, and each provides its own 1 Mbit/s differential driver and receiver with 12 V bus robustness. The standby function lets the controller de-energise one link while keeping the other active, and the low quiescent current makes battery-backed backup paths practical. Use the manufacturer typical application circuit as the basis for termination and common-mode choke placement on both buses.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: TJA1044GTK/3Z — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | TJA1044GTK/3 | TJA1044GK/3 |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 8-HVSON (SOT782-1) 3x3 mm | 8-HVSON (SOT782-1) 3x3 mm - identical | 8-HVSON (SOT782-1) 3x3 mm - identical |
| Data Rate | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s |
| Transceiver Configuration | Half (1 TX / 1 RX) | Half (1 TX / 1 RX) | Half (1 TX / 1 RX) |
| MCU I/O Interface (Vio) | 3.3 V to 5.0 V | 3.3 V to 5.0 V | 3.3 V to 5.0 V |
| CAN Bus Robustness | 12 V | 12 V | 12 V |
| Standby / Low-Power Mode | Yes, with wake-up pattern detection | Yes, with wake-up pattern detection | Yes, with wake-up pattern detection |
| Product Family | Mantis high-speed CAN | Mantis high-speed CAN | Mantis high-speed CAN |
| Orderable Code Note | TJA1044GTK/3Z, Z = sulfur barrier bag packaging option | No Z suffix on the orderable code | Alternate ordering code, same type number |
Ana Farklılayıcılar
- Compact 3 x 3 mm HVSON-8 footprint with a dedicated Vio logic rail (karşılaştırma:TJA1044GT/3Z)
- Newer Mantis-family EMC performance in 12 V automotive networks (karşılaştırma:TJA1042T/1J)
- Remote wake-up without local MCU intervention (karşılaştırma:TJA1057T/1Z)
Tasarım Notları
Keep CANH and CANL as a tightly coupled differential pair with a continuous ground reference on the layer directly beneath them, and avoid stubs, vias, and test pads on both nets. Place the 60 ohm split termination network (30 ohm plus 30 ohm) at the two physical ends of the bus only, not at every node. Position the transceiver close to the bus connector so the exposed pad sits over a solid ground pour; this gives the low-impedance return path that keeps common-mode currents from radiating into adjacent sensor wiring. The typical application circuit in the NXP TJA1044 data sheet is the reference for termination and decoupling placement.
Decouple VCC and Vio separately with local ceramic capacitance placed directly at the pins, and route the return current of the exposed pad into the ground plane rather than through the signal ground network. Because the Vio domain drives the RXD output, tying Vio to the MCU supply of 3.3 V or 5.0 V avoids level-shifter components, but it also means the transceiver logic rail must tolerate the MCU supply tolerance. Confirm the VCC and Vio operating ranges in the TJA1044 data sheet before releasing the schematic, and verify the rail sequencing during power-up so the MCU pins never see an undefined TXD level.
Do not substitute an SO8-outline device such as the TJA1044GT/3Z, the TJA1042T/1J, or the TCAN1044VDDFR directly on this board; their land patterns differ from the 3 x 3 mm HVSON-8 footprint even though the pin functions are similar. A common field failure mode is fitting a hand-soldered or reworked part with solder bridges across CANH and CANL or across the thermal pad, which shows up as intermittent bus errors rather than a hard no-communication symptom. Inspect the exposed pad fill and the CAN differential pair for solder contamination, and check the nSTB pull network because a floating nSTB pin leaves the transceiver in an undefined state.
The TJA1044 is engineered for improved EMC behaviour in 12 V automotive systems, but system-level compliance still depends on the bus interface. Add a common-mode choke in series with the differential pair when the harness is long or the module sits near a switching supply, and keep the choke close to the connector rather than near the IC. Verify radiated emissions with the production harness and enclosure, because cable length changes the termination and common-mode current distribution. Firmware should also handle the wake-up pattern detector carefully so a spurious pattern on the bus does not cause an unintended node wake-up.
Uyumluluk Bilgisi
The manufacturer describes the TJA1044GTK family as automotive grade for 12 V in-vehicle networks. RoHS, REACH, and AEC-Q100 qualification status must be confirmed on the NXP product page and the current material declaration for the exact orderable code.
