TJA1044GT - High-Speed CAN Transceiver, SO-8 | NXP
부품 번호: TJA1044GT ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.15 | $575.00 |
| 1,000 | $0.98 | $980.00 |
TJA1044GT 개요
A CAN transceiver is a physical-layer (PHY) device that translates the digital transmit/receive logic signals from a microcontroller or CAN protocol controller into the differential voltage levels defined by ISO 11898-1 for the CAN bus. Within the broader hierarchy, a CAN transceiver sits between the data-link layer (handled by the protocol controller) and the physical differential bus; in an in-vehicle networking stack it is part of the in-vehicle communication (IVN) physical layer alongside LIN, FlexRay and Ethernet PHYs.
Key features include very low standby current (typical 5 uA) for always-on automotive networks, an autonomous standby/sleep mode that wakes the device when bus activity is detected, excellent EMC performance optimized for automotive bus nodes, and full ISO 11898-2 (and ISO 11898-5 for the low-power variant) compliance. The Mantis family architecture used across the TJA1044 family provides tight parametric matching between variants, simplifying multi-rail ECU designs.
The TJA1044GT is part of NXP's Mantis CAN transceiver family and is widely used as a drop-in replacement or alternate for the legacy TJA1050/TJA1040 in next-generation ECUs. The 8-pin SO (SOIC-8) footprint with industry-standard pinout (TXD, GND, VCC, RXD, VIO/n.c., CANH, CANL, STB) allows easy migration from older TJA1040/TJA1050 designs to modern CAN FD networks. The part operates from a single 4.75V to 5.25V supply on VCC.
Typical applications include automotive body-control modules (BCMs), gateway ECUs, infotainment and cluster CAN nodes, chassis and powertrain CAN nodes requiring low quiescent current, and industrial CAN networks. The selective wake-up capability also suits CAN-based partial networking where the ECU must remain in low-power while monitoring the bus for a wake frame.
When designing with the TJA1044GT, place a 100 nF decoupling capacitor close to VCC (pin 5 on the GT variant, which has no VIO pin) and ensure the split-termination (typically 60 ohm with two 30 ohm resistors and a 4.7 nF capacitor to ground) is correctly placed for proper recessive-level biasing. The STB pin must be tied to logic-low for Normal operation.
This page synthesizes distributor stock and pricing, drop-in TJA1044 family alternatives, and practical EMC/PCB layout notes that are not compiled in a single place in the manufacturer datasheet.
드롭인 대체품: TJA1044GT — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TJA1044BT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1044CT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1044AT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1044GT/3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1044GT 사양
| 기능 | High-speed CAN transceiver with Standby mode |
| Protocol | ISO 11898-2 (CAN), CAN FD compatible |
| Maximum Data Rate | 5 Mbps (CAN FD) |
| Number of Drivers/Receivers | 1/1 |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| 동작 온도 | -40 C to +125 C |
| 패키지 | SO-8 (SOIC-8, 3.9 mm body width) |
| 실장 유형 | Surface Mount |
| 핀 수 | 8 |
| MSL 레벨 | 1 (per distributor listing) |
| Automotive Qualification | AEC-Q100 Grade 1 |
| RoHS 상태 | Compliant |
| Logic Levels (TXD/RXD/STB) | 5 V CMOS |
| VIO Pin (digital I/O level shifting) | No (n.c. on TJA1044GT; pin 5 not bonded) |
TJA1044GT 핀 구성
| 핀 1 | TXD — Transmit data input from CAN controller (5 V CMOS, internal pull-up) |
| 핀 2 | GND — Ground reference |
| 핀 3 | VCC — 5 V supply voltage (4.75 V to 5.25 V) |
| 핀 4 | RXD — Receive data output to CAN controller (5 V CMOS) |
| 핀 5 | n.c. — Not connected (no VIO pin on TJA1044GT variant) |
| 핀 6 | CANL — Low-level CAN bus line (differential) |
| 핀 7 | CANH — High-level CAN bus line (differential) |
| 핀 8 | STB — Standby mode control input (active high = Standby, low = Normal) |
일반적인 애플리케이션
TJA1044GT 적합 용도: 6 애플리케이션s: Automotive Body Control Modules (BCM), In-Vehicle Gateway ECU, Infotainment and Cluster CAN Nodes, Industrial CANopen / DeviceNet Nodes, Chassis and Safety CAN Nodes, Battery Management Systems (BMS) Slave Modules.
Automotive Body Control Modules (BCM)
The TJA1044GT fits BCM applications because of its 5 Mbps CAN FD capability and AEC-Q100 Grade 1 qualification across -40 C to +125 C. The very low standby current (~5 uA) lets the BCM stay in low-power mode while still monitoring the CAN bus for wake frames from the gateway or driver door module. Placed between the BCM microcontroller (typically an S32K or similar) and the CAN bus, it provides the differential drive and receive capability that ISO 11898-2 requires. Compared with legacy TJA1050 parts, the TJA1044GT cuts quiescent drain by two orders of magnitude while keeping the same SO-8 footprint.
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In-Vehicle Gateway ECU
The TJA1044GT is well suited to central gateway ECUs that bridge CAN segments between body, chassis and powertrain domains. Its 5 Mbps CAN FD support allows high-throughput data exchange between ECUs while the autonomous standby mode keeps the gateway's overall quiescent drain within OEM budgets. Using the same SO-8 footprint as legacy TJA1050/TJA1040 parts, designers can drop the TJA1044GT into existing gateway PCBs without a layout change, modernizing the bus PHY without re-spinning hardware.
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Infotainment and Cluster CAN Nodes
For head units, instrument clusters and HVAC control modules on the body CAN bus, the TJA1044GT delivers the EMC robustness and CAN FD bandwidth required for diagnostic data and rapid module updates. Its optimized transmitter symmetry minimizes radiated emissions, simplifying OEM EMC compliance. Standby mode lets the cluster fully power down with the ignition while still being wakeable from the bus, important for OEM-specified partial-networking behavior.
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Industrial CANopen / DeviceNet Nodes
Although AEC-Q100 qualified, the TJA1044GT meets the underlying ISO 11898-2 / ISO 11898-5 electrical requirements and is widely used in industrial CANopen, DeviceNet and proprietary CAN networks. Its wide -40 C to +125 C operating range covers outdoor cabinets and factory-floor environments, while the 5 Mbps data rate suits CANopen FD profiles and high-speed device configuration. Standby mode supports battery-powered or energy-harvesting industrial sensors that must sleep until polled.
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Chassis and Safety CAN Nodes
Brake, steering and ADAS sensor ECUs that communicate over the chassis CAN bus benefit from the TJA1044GT's AEC-Q100 Grade 1 qualification, deterministic loop delay, and high ESD robustness. The same SO-8 footprint as legacy TJA1040 makes it a low-risk upgrade for existing designs where improved CAN FD bandwidth is needed for radar, lidar or IMU data fusion. The device's low radiated emissions help chassis ECUs pass OEM-specific EMC tests such as BMW, VW and Toyota-derivative specifications.
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Battery Management Systems (BMS) Slave Modules
In large EV battery packs, individual slave BMS modules communicate over an isolated CAN bus using parts like the TJA1044GT. The very low standby current extends the parking/storage discharge time of the high-voltage pack, while AEC-Q100 qualification supports under-hood thermal exposure. The wide 4.75V-5.25V VCC range works directly from the typical 5 V isolated supply generated on the slave side of a digital isolator.
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추천 제품 요약
엔지니어링 참조 데이터: TJA1044GT — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TJA1044BT | TJA1044CT | TJA1044AT | TJA1044GT/3 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | SO-8 | SO-8 - same | SO-8 - same | SO-8 - same | SO-8 - same |
| CAN FD Data Rate | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps |
| Standby Mode (STB pin) | Yes (STB pin) | No (basic variant, always Normal) | Yes | Yes | Yes |
| VIO Pin (3.3 V MCU support) | No (n.c. on pin 5) | No | No | No | Yes (pin 5 = VIO) |
| AEC-Q100 Grade | Grade 1 (-40 C to +125 C) | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
| Drop-in vs TJA1044GT | Reference | Drop-in except STB pin unused | Drop-in | Drop-in | Pin-5 differs (VIO vs n.c.) |
주요 차별점
- Very low standby current for always-on automotive networks (vs TJA1050)
- 5 Mbps CAN FD support in legacy SO-8 footprint (vs TJA1050)
- TJA1044 sub-family flexibility within the same SO-8 footprint (vs TJA1051)
설계 노트
Place a 100 nF X7R ceramic decoupling capacitor as close as possible to the VCC pin (pin 3). Keep the GND return path short and wide, ideally using a continuous ground plane on the top layer under the SO-8 paddle. Route CANH and CANL as a 100-120 ohm differential pair with characteristic impedance of 60 ohm (single-ended 30 ohm), keeping the pair length-matched within 5 mm to minimize intra-pair skew at 5 Mbps CAN FD.
Use split termination (two 60 ohm resistors in series between CANH and CANL with a 4.7 nF-10 nF capacitor to ground at the centre tap) instead of a single 120 ohm resistor at each bus end. Split termination stabilizes the recessive common-mode voltage and reduces high-frequency common-mode emissions, which is critical for meeting OEM EMC limits such as the BMW GS 95002 or VW TL 810 specifications.
Do not confuse the TJA1044GT (no VIO, pin 5 = n.c.) with the TJA1044GT/3 (pin 5 = VIO for 3.3 V MCU support). Pulling pin 5 high on a plain TJA1044GT will force the part into an undefined state because pin 5 is unbonded - leave it floating or tie it to GND through a 100 kohm resistor for safety. Always check the variant suffix before PCB assembly.
Tie STB (pin 8) to GND through a 100 kohm pull-down to keep the device in Normal mode by default during microcontroller firmware boot. Drive STB high only after firmware initializes the CAN controller, otherwise a high STB at POR will leave the bus monitor enabled and the TXD driver disabled, blocking any outgoing traffic. Add a small RC (10 kohm + 100 nF) on STB if the MCU GPIO is shared with other peripherals to filter ESD and noise spikes.
규정 준수 정보
AEC-Q100 Grade 1 qualified for automotive body and safety applications. RoHS and REACH compliant per NXP product page and distributor listings. Halogen-free per JEDEC JS709.
