TJA1044T/1Z - High-Speed CAN Transceiver, 1Mb/s, 8-SO | NXP
部品番号: TJA1044T/1Z ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.95 | $95.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.66 | $660.00 |
| 2,500 | $0.57 | $1,425.00 |
TJA1044T/1Z 概要
A CAN transceiver is the physical-layer device that sits between a microcontroller's CAN protocol controller and the differential CANH/CANL bus wires. It translates the controller's digital transmit (TXD) and receive (RXD) signals into the dominant/recessive differential voltage levels required by the ISO 11898 standard, while providing ESD protection, bus fault tolerance, and common-mode rejection. The TJA1044 belongs to the higher-level hierarchy: CAN transceiver → automotive network interface IC → in-vehicle networking → automotive power management, and is widely used wherever an MCU must communicate over a robust, differential bus.
Key features include very low standby current with wake-up capability, an internal slope-control mechanism that reduces electromagnetic emissions, and excellent EMC performance that allows removal of common-mode chokes. The device provides high ESD robustness on the bus pins (typically ≥8 kV HBM) and is specified over the -40 °C to +150 °C automotive temperature range. A dedicated standby mode reduces quiescent current while still monitoring the bus for wake-up activity, making the TJA1044T/1Z well suited for always-on automotive networks.
The implementation uses NXP's proven BiCMOS process and an advanced differential transmitter with tightly controlled edge symmetry to minimise radiated emissions. Combined with an integrated split-pin concept (the SPLIT output stabilises the recessive common-mode voltage of the bus) and a wide common-mode range for CANH/CANL, the design delivers high ElectroMagnetic Compatibility (EMC) margins even on long cable backbones.
Typical applications include high-speed CAN body and chassis networks, powertrain ECUs (where the part operates at -40 °C to +150 °C), CAN nodes for body-control modules (BCMs), gateway nodes between CAN and CAN FD buses, and industrial CAN-FD field-bus nodes in vehicles, trucks, agricultural equipment, and forklifts.
When designing with the TJA1044T/1Z, place a 100 nF decoupling capacitor as close as possible to the VCC pin and follow the bus-layout recommendations in the manufacturer datasheet. A split termination (typically 60 Ω between CANH and CANL plus two 30 Ω resistors to ground through a 4.7 nF capacitor, or referenced to the SPLIT pin) significantly improves EMC behaviour and should not be omitted on long stubs.
This page combines manufacturer-anchored specifications, same-family drop-in alternatives, comparison data and PCB-level design notes that go beyond a single distributor product listing.
ドロップイン代替品: TJA1044T/1Z — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TJA1044T/1Z （同一形状・フットプリント） — 相違点: Package, ESD Protection (Bus Pins, HBM), Product Type, Protocol.
クイック比較ツール — 並列比較する代替部品を選択:
TJA1044T/3
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TJA1044GT/1Z
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TJA1042T/1J
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →SIT1044QT/3
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TCAN1044A-Q1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SN65HVD230DR
✅ ドロップイン✓ 在庫あり
$0.94 / 個
データシートを見る →TJA1044T/1Z 仕様
| 機能 | High-speed CAN transceiver with Standby mode |
| Number of Drivers/Receivers | 1/1 |
| Protocol | CAN, CAN FD |
| Data Rate (T variant) | Up to 1 Mbit/s (5 Mbit/s in CAN FD fast phase) |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| 動作温度範囲 | -40 °C to +150 °C |
| ESD Protection (Bus Pins, HBM) | ≥ 8 kV (typical, per datasheet) |
| Bus Fault Tolerance | -27 V to +40 V on CANH/CANL (per datasheet) |
| Common-Mode Voltage Range | -12 V to +12 V (typical) |
| Standby Mode | Yes (low-Iq, with bus wake monitoring) |
| SPLIT Pin | Yes (recessive common-mode stabilisation) |
| パッケージ | 8-pin SOIC (SO) |
| 実装タイプ | Surface Mount |
| RoHS / REACH Status | RoHS compliant (per NXP product page) |
| Datasheet Standard Compliance | ISO 11898-2:2024 (3rd edition), SAE J2284-1 to SAE J2284-5 |
TJA1044T/1Z ピン構成
| ピン 1 | TXD — Transmit data input from CAN controller; logic input |
| ピン 2 | GND — Ground reference for digital supply |
| ピン 3 | VCC — +5 V supply input |
| ピン 4 | RXD — Receive data output to CAN controller; logic output |
| ピン 5 | SPLIT — Recessive common-mode stabilisation output (reference for split termination) |
| ピン 6 | CANL — CAN low bus line |
| ピン 7 | CANH — CAN high bus line |
| ピン 8 | STB — Standby-mode control input (active-high = standby) |
主な用途
TJA1044T/1Z の用途: 6 件s: Automotive Body and Chassis CAN Bus Nodes, Powertrain ECU Communication (EMS / TCU / ADAS Sensor Bus), In-Vehicle Gateway (CAN ↔ CAN FD Bridge), Industrial CAN-Based Field Bus Nodes, Truck, Bus and Heavy-Duty Vehicle Networks, Battery Management System (BMS) CAN Slave Modules.
Automotive Body and Chassis CAN Bus Nodes
The TJA1044T/1Z is purpose-built for high-speed CAN in body and chassis networks, where it converts the MCU's TXD/RXD CMOS signals into the ISO 11898-2:2024-compliant differential levels on CANH and CANL. Its compliance with ISO 11898-2 (3rd edition) and SAE J2284-1 to SAE J2284-5 means it interoperates with every other ISO 11898-2-compliant ECU on the bus, while supporting CAN FD fast-phase data rates up to 5 Mbit/s and arbitration phase up to 1 Mbit/s. End-of-line compliance with the OEM's CAN conformance test (e.g. PnO conformance, GMW 3122) is achievable without external bus protection in 12 V systems. Combined with the -40 °C to +150 °C operating range, the TJA1044T/1Z sits comfortably in body-control modules and chassis ECUs that must operate underhood.
おすすめ
Powertrain ECU Communication (EMS / TCU / ADAS Sensor Bus)
Inside powertrain ECUs such as engine management systems (EMS), transmission control units (TCU) and ADAS radar sensors, the TJA1044T/1Z acts as the bus-side termination and signalling block between the MCU and the in-vehicle CAN bus. Its low standby current (when the bus is idle and the node goes to sleep) keeps quiescent draw low on always-on networks, while the wake-up pattern recognition allows the rest of the ECU to remain powered down. The loop-delay symmetry target on the /3 family variant supports reliable CAN-FD communication in the fast phase, critical for sensor data transport in ADAS networks where latency budgets are tight. Add an external 12 V TVS (e.g., SMBJ24CA-Q1 equivalent) and a 10 nF common-mode filter capacitor to meet OEM load-dump and reverse-polarity specifications.
おすすめ
In-Vehicle Gateway (CAN ↔ CAN FD Bridge)
A gateway ECU between a classic 500 kbit/s CAN body bus and a 2 Mbit/s CAN-FD powertrain bus uses two TJA1044T/1Z devices per channel: one tied to each bus side of the gateway. The split-pin (SPLIT) feature actively stabilises the recessive common-mode voltage at 2.5 V, which is particularly valuable on long bus backbones with several drop-taps. Combined with internal slope control for low-emission edges, the part removes the need for external common-mode chokes, saving PCB area and BoM cost. ISO 11898-2:2024 third-edition compliance ensures the gateway forwards frames without re-quantisation errors.
おすすめ
Industrial CAN-Based Field Bus Nodes
Outside the automotive cabin, the TJA1044T/1Z supports industrial CANopen and J1939 field-bus nodes in pumps, motor drives, instrumentation, and agricultural machinery. The -40 °C to +150 °C operating range and ≥8 kV HBM ESD robustness allow deployment in outdoor enclosures, while the wide bus-fault tolerance of -27 V to +40 V on CANH/CANL absorbs stray DC voltages on long cable harnesses. CAN-FD capability up to 5 Mbit/s in the fast phase future-proofs the design for next-generation high-data-rate CANopen profiles. Add a 60 Ω split termination with two 30 Ω resistors and a 4.7 nF capacitor to SPLIT for optimum EMC behaviour on long stubs.
おすすめ
Truck, Bus and Heavy-Duty Vehicle Networks
Trucks and city buses run on 24 V electrical systems and operate in harsher electrical environments than passenger cars. The TJA1044T/1Z is supplied from a local 5 V regulator and tolerates bus-fault voltages on CANH and CANL of up to -27 V and +40 V, which covers 24 V jump-start and load-dump envelopes. CAN FD up to 5 Mbit/s enables aggregated sensor traffic from brakes, driveline and ADAS sensors on a single backbone, while keeping the BOM comparable to legacy 1 Mbit/s designs. Always follow the manufacturer datasheet's split-termination layout and add a 24 V TVS (e.g. SMBJ33CA family) on the bus connector for full conformance to OEM heavy-duty EMC specifications.
おすすめ
Battery Management System (BMS) CAN Slave Modules
Distributed battery-management systems in EVs and stationary battery racks often use CAN as the in-pack communication backbone, with each slave board hosting a TJA1044T/1Z. The transceiver's wide input-tolerance on CANH/CANL allows the bus to be daisy-chained across the pack without active signal conditioning, and its low standby current is critical for minimising quiescent draw from the battery when the vehicle is parked. Combined with the OBC's 12 V auxiliary rail, the part supports 1 Mbit/s frame transmission for cell voltage, temperature and SoC telemetry. Always place a 100 nF X7R bypass capacitor close to VCC and observe the GND-loop layout in the manufacturer's datasheet to avoid ground-bounce faults.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TJA1044T/1Z — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TJA1044T/3 | TJA1044GT/1Z | TJA1042T/1J | SIT1044QT/3 | TCAN1044A-Q1 |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Silan Microelectronics | Texas Instruments |
| Protocol | CAN, CAN FD up to 5 Mbit/s | CAN, CAN FD with loop-delay spec | CAN, CAN FD | CAN, CAN FD | CAN, CAN FD | CAN, CAN FD |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Operating Temperature | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +125 °C | -40 °C to +125 °C to +150 °C (per grade) | -40 °C to +125 °C |
| Standby Mode | Yes (STB pin) | Yes | Yes | Yes | Yes | Yes |
| SPLIT Pin | Yes | Yes | Yes | Yes | Yes | No (NC) |
| AEC-Q100 Qualified | Per NXP family (TJA1044 family is automotive-grade) | Per NXP family | Per NXP family | Per NXP family | Per Silan automotive-grade documentation | Yes (AEC-Q100 -Q1 suffix) |
| Approx. Unit Price (qty-1, USD) | ≈ 1.42 | ≈ 1.45 | ≈ 1.55 | ≈ 1.10 | ≈ 0.55 | ≈ 1.90 |
主な差別化要因
- Mantis-family split-termination support gives next-generation EMC margins without external chokes （vs TCAN1044A-Q1)
- ISO 11898-2:2024 third-edition compliance （vs SN65HVD230DR)
- Drive strength and slope control reduce radiated emissions more than the SIT clone's basic implementation （vs SIT1044QT/3)
設計ノート
Place a 100 nF (X7R 10 V) decoupling capacitor as close as physically possible to the VCC pin (typically within 2-3 mm of the pad). Connect the GND pin and the exposed SO-8 thermal pad to the GND plane on the top layer via a single, low-impedance via. Keep the CANH/CANL traces matched (skew < 50 ps over the full bus length) and avoid 90° bends on bus traces. Place the split termination components (two 30 Ω resistors and a 4.7 nF capacitor) on the same side of the PCB as the transceiver, leaving a stub of less than 5 mm to CANH/CANL.
Do not float the SPLIT pin if you have a split-termination network connected to it - leave the SPLIT pin open only when you use a single 120 Ω bus termination across CANH and CANL. The STB pin transitions on rising edges: ensure firmware holds STB low during boot and only sets it to one of the two valid operating modes. The TXD input is required to be driven; if your MCU boot delays exceed the WUP guard band, momentarily tie TXD to GND through a 10 kΩ resistor to avoid unwanted bus dominance during firmware download.
For excellent EMC, use split termination tied to SPLIT: two 30 Ω resistors from CANH and CANL to SPLIT, with a 4.7 nF bypass from SPLIT to ground, plus a single 60 Ω resistor across CANH and CANL at each end of the bus. This topology actively stabilises the recessive common-mode at 2.5 V and reduces radiated emissions. Estimated: with this termination on a 5 m bus at 1 Mbit/s, total common-mode noise falls below the OBC OEM GMW 3122 14 dBuV envelope without requiring common-mode chokes.
For long bus backbones (longer than ~10 m) or stub-heavy topology, verify the propagation delay of TJA1044T/1Z and the associated bit timing against the bus-length budget. Loop-delay symmetry is tighter on the /3 and /B variants of the family; for plain 1 Mbit/s classic CAN, the T-variant (TJA1044T) is sufficient. Always specify the bus-line maximum length and number of nodes to compare against the manufacturer's tested conformances shown in the datasheet.
コンプライアンス情報
RoHS compliance per NXP product page. AEC-Q100 qualification is part of the TJA1044 family; verify the exact ordering suffix with NXP for PPAP submission. Lead-free / halogen-free status typical for the SO-8 packing variant.
