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NXP Semiconductors TJA1055T/3/C,518
- Part No.:
- TJA1055T/3/C,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TJA1055T/3/C,518.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:10,217
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Product details
Overview
TJA1055T/3/C,518 from NXP Semiconductors is a fault-tolerant low-speed CAN transceiver designed for automotive body electronics and chassis networks. It supports up to 125 kBd data rate, operates with 4.75–5.25 V supply, consumes ≤40 µA in sleep mode, and features ±6 kV IEC 61000-4-2 ESD protection on CANH/CANL-enabling robust communication in passenger car wiring harnesses with unshielded bus wires.
For engineers reviewing the TJA1055T/3/C,518 datasheet, TJA1055T/3/C,518 pinout, TJA1055T/3/C,518 application, or TJA1055T/3/C,518 equivalent, this page delivers verified functional identity, validated low-power mode behavior, confirmed single-wire failover operation, exact termination resistor interface (RTH/RTL), and real-world wake-up signaling capability without VCC.
Technical Context
The TJA1055T/3/C,518 implements dual-mode bus interface logic: differential transmit/receive under normal conditions, and automatic switch to single-wire CANH or CANL operation upon detection of bus faults-including CANH short-to-battery, CANL short-to-ground, or mutual CANH/CANL short. Its failure detector uses voltage comparators with time-out filtering to prevent false triggering from RF noise.
It integrates three low-power states-sleep, standby, and power-on standby-controlled via STB and EN pins, with wake-up support through both bus lines (remote) and WAKE pin (local). The TJA1055T/3 variant provides open-drain RXD and ERR outputs and enables 3 V microcontroller interfacing via internal current-source biasing on RTL/RTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Baud rate | Up to 125 kBd-supports full low-speed CAN protocol compliance for body control modules and door ECUs. |
| Supply voltage (VCC) | 4.75–5.25 V-ensures stable operation across automotive battery fluctuations without external regulation. |
| Sleep current (IBAT) | 25–40 µA at 14 V-enables multi-year battery life in always-on vehicle subsystems like alarm or keyless entry. |
| ESD protection | ±6 kV IEC 61000-4-2 on CANH/CANL-meets automotive EMC requirements for in-vehicle cable harness exposure. |
| Dominant output (CANH) | VCC − 1.4 V at −40 mA-guarantees reliable dominant-level drive into 120 Ω bus termination under worst-case load. |
| Wake-up threshold (CANL) | 2.5–3.9 V in low-power modes-allows valid remote wake-up detection even with degraded bus signal integrity. |
| Thermal shutdown | 160–190 °C junction temperature-protects against latch-up during sustained bus short-circuit events. |
Pinout & Package
Package: SO14 (SOT108-1), plastic small outline, 14-lead, 3.9 mm body width-compatible with standard automotive PCB assembly processes and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INH | Inhibit output | Drives external voltage regulator enable; floats in sleep mode to disable auxiliary supply and reduce system quiescent current. |
| 2 TXD | Transmit data input | CMOS-compatible digital input; drives bus driver; includes dominant time-out to prevent network lockup from MCU firmware hang. |
| 3 RXD | Receive data output | Open-drain output (TJA1055T/3); requires external pull-up; signals decoded CAN bus state to microcontroller. |
| 4 ERR | Error/wake-up indicator | Open-drain output (TJA1055T/3); active LOW for bus error, wake-up event, or VBAT power-on flag-no VCC required for wake detection. |
| 5 STB | Standby control | Digital input; combined with EN to select sleep/standby/power-on standby/normal operating modes per Table 5. |
| 6 EN | Enable control | Digital input; failsafe logic forces LOW when VCC drops below 3.1 V-ensures predictable low-power transition during brownout. |
| 7 WAKE | Local wake-up input | Edge-triggered (rising/falling); weak internal pull-up to VBAT; immune to open-wire faults; enables wake from microcontroller GPIO. |
| 8 RTH | CANH termination bias | Connects to external termination resistor; switches to 75 µA pull-down current source during CANH short-to-battery failure. |
| 9 RTL | CANL termination bias | Connects to external termination resistor; switches to 75 µA pull-up current source during CANL short-to-ground failure. |
| 10 VCC | Logic supply | 5 V nominal supply for internal logic and drivers; powers RXD/ERR buffers only when active-open-drain outputs function without it. |
| 11 CANH | High-side CAN bus line | Differential bus terminal; withstands −58 V to +58 V; protected against ISO 7637 transients and short-circuit to battery/ground. |
| 12 CANL | Low-side CAN bus line | Differential bus terminal; same ruggedness as CANH; supports single-wire receive when CANH fails. |
| 13 GND | Ground reference | Primary signal return path; separates logic ground from battery ground to avoid ground-loop noise coupling. |
| 14 BAT | Battery supply input | Direct connection to vehicle battery (−0.3 V to +58 V); powers internal protection circuits, wake-up logic, and fail-safe functions independent of VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic single-wire failover | Switches to CANH-only or CANL-only transmission within microseconds of detecting CANH short-to-battery or CANL short-to-ground-maintains network availability during wiring faults. |
| 3 V microcontroller interface | TJA1055T/3 variant supports direct connection to 3 V MCUs via open-drain RXD/ERR and internal current-source biasing-eliminates level-shifter components. |
| Wake-up without VCC | ERR and RXD assert active-LOW wake-up signals even when VCC is unpowered-enables ultra-low-power monitoring of bus activity or local WAKE pin. |
| Differential receiver filtering | Integrated RC filters suppress HF noise on CANH/CANL-reduces false dominant detection and improves immunity in noisy engine compartments. |
| TxD dominant time-out | Disables transmitter if TXD remains LOW > 10 ms-prevents permanent bus dominance and preserves network functionality after MCU crash or software fault. |
Applications
| Body Control Module (BCM) | Door Control Unit (DCU) |
|---|---|
|
Use Scenario: Centralized management of lighting, windows, locks, and mirrors in modern passenger vehicles. IC Role / Device Role / Timing Role: CAN transceiver bridging MCU UART to low-speed CAN bus; handles fault detection, wake-up, and bus arbitration. Use Value: Enables uninterrupted communication during wiring faults (e.g., chafed harnesses), reducing warranty claims and field failures. |
Use Scenario: Distributed control of power windows, central locking, and mirror adjustment per vehicle door. IC Role / Device Role / Timing Role: Fault-tolerant physical layer interface between door MCU and body network; supports single-wire operation during CANL breakage. Use Value: Maintains window auto-up/down and lock/unlock functionality even with partial bus degradation-critical for ASIL-B compliance. |
| Roof Module (Sunroof/Climate) | Seat Control Unit (SCU) |
|
Use Scenario: Integration of sunroof position sensors, climate actuators, and ambient light controls into vehicle roof console. IC Role / Device Role / Timing Role: Low-power CAN node transceiver; enters sleep mode when vehicle is off; wakes on bus activity or local WAKE signal. Use Value: Achieves <40 µA sleep current-extending battery life in parked vehicle scenarios while retaining instant wake responsiveness. |
Use Scenario: Motorized seat position memory, heating, and lumbar adjustment controlled by seat-mounted MCU. IC Role / Device Role / Timing Role: Robust CAN interface with ±6 kV ESD protection-survives repeated electrostatic discharge from occupant contact in dry climates. Use Value: Eliminates field returns due to ESD-induced transceiver latch-up-verified per IEC 61000-4-2 Level 4 testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-tolerant CAN transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1054T/3 | Lacks wake-up signaling without VCC; lower ESD rating (±4 kV IEC 61000-4-2); no TxD time-out function. | Not suitable for systems requiring guaranteed wake-up during battery-only operation or high-noise engine bay environments. | Select TJA1055T/3/C,518 where fail-safe wake-up, enhanced ESD, and dominant time-out are mandatory. |
| MCP2551-I/P | Standard-speed (1 Mbps) transceiver; no single-wire failover; higher supply current (≤12 mA active); no BAT pin or sleep mode. | Designed for high-speed powertrain networks-not compatible with low-speed body domain topology or ultra-low-power requirements. | Choose TJA1055T/3/C,518 for low-speed, fault-tolerant, battery-conscious automotive body networks-not for 1 Mbps CAN FD or non-automotive use. |
Compared with TJA1054T/3, the TJA1055T/3/C,518 adds critical fail-safe wake-up capability and ESD robustness; compared with MCP2551-I/P, it delivers dedicated low-speed fault tolerance, sub-µA sleep current, and integrated bus failure recovery-making it uniquely suited for automotive body electronics.
Availability
TJA1055T/3/C,518 is available at Aetrix Electronics and suitable for automotive body control modules, door control units, roof consoles, and seat control systems requiring stable component supply across extended vehicle lifecycles and global production programs.
Supply support for TJA1055T/3/C,518 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, delivering secure, energy-efficient, and highly integrated solutions.
The TJA1055 product line targets fault-tolerant low-speed CAN communication in automotive body electronics-designed specifically for reliability in harsh wiring environments, extended temperature operation, and ultra-low-power vehicle-off states.
FAQ
What is the key functional difference between TJA1055T/3/C,518 and the legacy TJA1054 series?
The TJA1055T/3/C,518 introduces wake-up signaling on ERR and RXD pins without VCC present-a critical enhancement over TJA1054/TJA1054A. It also delivers improved ESD robustness (±6 kV IEC 61000-4-2 vs. ±4 kV), lower sleep current (≤40 µA vs. ≥60 µA), and integrated TxD dominant time-out to prevent network lockup. These features make TJA1055T/3/C,518 suitable for next-generation ultra-low-power automotive body networks where legacy parts fall short.
Does TJA1055T/3/C,518 support true 3 V microcontroller interfacing?
Yes. The TJA1055T/3/C,518 variant features open-drain RXD and ERR outputs with internal current-source biasing on RTL/RTH pins-enabling direct connection to 3 V MCUs without external level shifters. Its TXD input accepts 2.4 V HIGH-level signals in both normal and low-power modes, and its VIH/VIL thresholds are fully compatible with 3 V logic families per Table 8.
How does TJA1055T/3/C,518 handle CAN bus wire failures?
The TJA1055T/3/C,518 automatically detects 7 defined bus failures (e.g., CANH short-to-battery, CANL short-to-ground) using comparator-based circuitry with time-out filtering. Upon detection, it switches to single-wire transmission/reception via CANH or CANL, adjusts RTH/RTL termination biasing, and asserts ERR LOW. Recovery to differential mode occurs automatically once bus integrity is restored-ensuring continuous network operation without MCU intervention.
Can TJA1055T/3/C,518 operate with VCC unpowered?
Yes. The TJA1055T/3/C,518 uses BAT (pin 14) as its primary power source for wake-up detection, failure monitoring, and ERR/RXD signaling. When VCC is absent, ERR and RXD remain functional as open-drain outputs-allowing wake-up interrupts to be detected by an external 3 V MCU via pull-up resistors. This capability is explicitly enabled in the TJA1055T/3 variant and confirmed in Section 7.2 of the datasheet.
What is the purpose of pins RTH and RTL on TJA1055T/3/C,518?
Pins RTH and RTL provide configurable termination biasing for the CANH and CANL bus lines. During normal operation, they connect to external 120 Ω termination resistors. During bus failures-such as CANH short-to-battery-they switch to 75 µA current sources (pull-down on RTH, pull-up on RTL) to maintain proper single-wire termination impedance. This ensures signal integrity and noise margin in both differential and single-wire modes per Table 4.
TJA1055T/3/C,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- CANbus
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
TJA1055T/3/C,518 FAQ
1.How can I place an order for TJA1055T/3/C,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for TJA1055T/3/C,518 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TJA1055T/3/C,518 reliable?
The price and inventory of TJA1055T/3/C,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TJA1055T/3/C,518 is usually 5 days.
3.What payment methods are accepted for TJA1055T/3/C,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TJA1055T/3/C,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TJA1055T/3/C,518?
TJA1055T/3/C,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TJA1055T/3/C,518 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TJA1055T/3/C,518?
For technical support, including TJA1055T/3/C,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1055T/3/C,518 requirements.
6.How does Aetrix verify that TJA1055T/3/C,518 is sourced from the original manufacturer or authorized distributors?
All TJA1055T/3/C,518 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TJA1055T/3/C,518 meets industry standards.
7.What is the process for return or replacement of TJA1055T/3/C,518?
All TJA1055T/3/C,518 units undergo pre-shipment inspection (PSI). If there is an issue with TJA1055T/3/C,518, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TJA1055T/3/C,518 part is unused and in its original packaging.
Return procedure for TJA1055T/3/C,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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