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Home > Products > Integrated Circuits (ICs) > Interface > Drivers, Receivers, Transceivers

NXP Semiconductors TJA1055T/C,518

Name: TJA1055T/C,518
Brand: NXP Semiconductors
SKU: TJA1055T/C,518
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TJA1055T/C,518

Manufacturer:: NXP Semiconductors

Category:: Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TJA1055T/C,518.pdf

Description:: IC TRANSCEIVER HALF 1/1 14SO

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Product details

Overview

TJA1055T/C,518 from NXP Semiconductors is a fault-tolerant low-speed CAN transceiver for automotive passenger car networks. It interfaces a CAN protocol controller to the physical bus, supports up to 125 kBd, operates with 4.75–5.25 V supply, consumes ≤40 µA in sleep mode, and enables single-wire operation during CANH or CANL bus failures-used in body control modules and door electronics.

For engineers reviewing the TJA1055T/C,518 datasheet, TJA1055T/C,518 pinout, TJA1055T/C,518 application, or TJA1055T/C,518 equivalent, key selection considerations include its ±6 kV IEC 61000-4-2 ESD rating, wake-up capability without active VCC, differential-to-single-wire failover logic, and SO14 package compatibility with legacy TJA1054 designs.

Technical Context

The TJA1055T/C,518 implements dual-mode bus interface logic: differential transmission/reception under normal conditions, and automatic fallback to single-wire (CANH-only or CANL-only) operation upon detection of short-to-battery, short-to-ground, or open-wire faults. Its failure detector uses voltage comparators on CANH/CANL with time-out filtering to prevent false triggering by RF noise.

It integrates slope-controlled drivers for low EME, built-in receiver filters for high EMI immunity, TxD dominant time-out protection, thermal shutdown at 175 °C typical, and battery-supplied wake-up signaling via ERR/RXD even when VCC is absent-enabling robust low-power vehicle network monitoring.

Key Specifications

Parameter	Value and Actual Design Meaning
Baud rate	Up to 125 kBd - supports full low-speed CAN protocol compliance for body electronics and comfort systems.
Supply voltage (VCC)	4.75–5.25 V - compatible with standard 5 V automotive microcontroller I/O domains.
Sleep current (IBAT)	25–40 µA at −40 °C to +125 °C - enables long-term battery-backed monitoring without excessive drain.
ESD protection	±6 kV IEC 61000-4-2 on CANH/CANL - meets automotive EMC requirements for harsh in-vehicle environments.
Bus fault tolerance	Detects and auto-switches to single-wire mode for CANH short-to-VCC, CANL short-to-ground, and open-wire faults - maintains partial network communication during wiring degradation.
Wake-up capability	ERR and RXD assert active-LOW wake-up signal with VBAT only - allows system recovery without VCC present, critical for cold-start diagnostics.
Thermal shutdown	Triggers at 175 °C typical - protects against latch-up during sustained bus shorts or overloads.

Pinout & Package

Package: SO14 (SOT108-1), plastic small outline, 14-lead, 3.9 mm body width - surface-mount compatible with standard automotive PCB assembly processes.

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 standby power.
2 TXD	Transmit data input	CMOS-level digital input controlling driver state; includes dominant time-out to prevent bus lockup from MCU firmware hangs.
3 RXD	Receive data output	Active-LOW open-drain output (TJA1055T variant); signals decoded bus data or wake-up event even without VCC.
4 ERR	Error/wake-up indicator	Active-LOW open-drain output indicating bus fault, wake-up, or VBAT power-on flag - functional in all low-power modes.
5 STB	Standby control input	Digital input (with EN) selecting sleep/standby/power-on-standby modes; retains state during VCC brownout via internal fail-safe logic.
6 EN	Enable control input	Digital input (with STB) determining operating state; internally forced LOW if VCC drops below 3.1 V to maintain safe low-power behavior.
7 WAKE	Local wake-up input	Edge-triggered (rising/falling) input with weak VBAT pull-up; immune to open-wire faults and RF interference via timing validation.
8 RTH	CANH termination bias	Connects to external resistor; switches to 75 µA pull-down during CANH short-to-VCC to enable CANL-only operation.
9 RTL	CANL termination bias	Connects to external resistor; switches to 75 µA pull-up during CANL short-to-ground to enable CANH-only operation.
10 VCC	Main supply	5 V logic supply powering internal circuitry; failsafe threshold (VCC(stb) = 3.1–4.5 V) ensures controlled mode transitions during undervoltage.
11 CANH	High-side CAN bus line	Differential bus terminal with ±58 V absolute max rating; includes integrated ESD clamps and transient protection per ISO 7637.
12 CANL	Low-side CAN bus line	Differential bus terminal with ±58 V absolute max rating; features matched output impedance and slope control for low EME.
13 GND	Ground reference	Primary analog/digital ground return; separates internal bias paths from bus fault currents to avoid coupling noise into logic domain.
14 BAT	Battery supply input	Direct connection to vehicle battery (−0.3 to +58 V); powers wake-up circuitry, fault detectors, and termination bias in absence of VCC.

Key Features

Feature	Design Value
Fault-tolerant single-wire mode	Automatic switch to CANH-only or CANL-only transmission upon detection of 7 defined bus failures - sustains partial network operation during wiring faults.
VCC-independent wake-up	ERR and RXD outputs remain functional with only BAT supply active - enables diagnostic wake-up and power-on flag readout before main MCU supply ramps.
Dual-threshold receiver architecture	Differential threshold (−3.2 V typ) for normal mode; separate single-ended thresholds (1.7 V on CANH, 3.3 V on CANL) for robust fault-mode reception.
Integrated TxD time-out	Disables transmitter if TXD remains LOW > timeout period - prevents permanent bus dominance due to MCU lockup or software error.
Automotive-grade ESD & transient protection	±6 kV IEC 61000-4-2 on bus pins; validated per ISO 7637 pulses 1, 2a, 3a, 3b - eliminates need for external TVS diodes in most body electronics layouts.
Low-power mode sequencing	Three distinct states (sleep/standby/power-on-standby) controlled by STB/EN with INH-driven regulator control - supports ASAM-compliant power management strategies.

Applications

Body Control Module (BCM)	Door Control Unit (DCU)
Use Scenario: Centralized control of lighting, windows, locks, and mirrors across multiple vehicle doors and panels. IC Role / Device Role / Timing Role: CAN transceiver bridging MCU to low-speed body bus; handles fault detection, wake-up, and power-state coordination. Use Value: Maintains communication during CANH/CANL wire damage (e.g., door hinge flex fatigue), enabling fail-operational window position reporting and anti-pinch diagnostics.	Use Scenario: Distributed node managing local door functions including handle sensors, mirror adjustment, and intrusion detection. IC Role / Device Role / Timing Role: Fault-tolerant physical layer interface enabling reliable command/response exchange with BCM over unshielded twisted pair. Use Value: Sleep current <40 µA extends battery life during vehicle off-state; wake-up via bus or WAKE pin triggers immediate MCU boot for fast door unlock response.
Roof Module (Sunroof/Climate)	Seat Control Unit
Use Scenario: Integration of sunroof motor, ambient light sensor, and HVAC actuators in overhead console with shared low-speed CAN backbone. IC Role / Device Role / Timing Role: Transceiver providing differential signaling and automatic single-wire fallback during roof harness vibration-induced opens or shorts. Use Value: Slope-controlled drivers minimize EME to avoid interference with nearby AM/FM antennas; integrated receiver filters suppress ignition noise.	Use Scenario: Occupant-sensing seat with position memory, heating, and airbag readiness monitoring linked to vehicle network. IC Role / Device Role / Timing Role: Robust CAN interface supporting diagnostic messaging, calibration updates, and crash-signal forwarding during deployment. Use Value: Thermal shutdown at 175 °C prevents damage during prolonged seat heater operation; BAT-powered wake-up enables pre-ignition seat position recall.

Body Control Module (BCM)

Door Control Unit (DCU)

Use Scenario: Centralized control of lighting, windows, locks, and mirrors across multiple vehicle doors and panels.

IC Role / Device Role / Timing Role: CAN transceiver bridging MCU to low-speed body bus; handles fault detection, wake-up, and power-state coordination.

Use Value: Maintains communication during CANH/CANL wire damage (e.g., door hinge flex fatigue), enabling fail-operational window position reporting and anti-pinch diagnostics.

Use Scenario: Distributed node managing local door functions including handle sensors, mirror adjustment, and intrusion detection.

IC Role / Device Role / Timing Role: Fault-tolerant physical layer interface enabling reliable command/response exchange with BCM over unshielded twisted pair.

Use Value: Sleep current <40 µA extends battery life during vehicle off-state; wake-up via bus or WAKE pin triggers immediate MCU boot for fast door unlock response.

Roof Module (Sunroof/Climate)

Seat Control Unit

Use Scenario: Integration of sunroof motor, ambient light sensor, and HVAC actuators in overhead console with shared low-speed CAN backbone.

IC Role / Device Role / Timing Role: Transceiver providing differential signaling and automatic single-wire fallback during roof harness vibration-induced opens or shorts.

Use Value: Slope-controlled drivers minimize EME to avoid interference with nearby AM/FM antennas; integrated receiver filters suppress ignition noise.

Use Scenario: Occupant-sensing seat with position memory, heating, and airbag readiness monitoring linked to vehicle network.

IC Role / Device Role / Timing Role: Robust CAN interface supporting diagnostic messaging, calibration updates, and crash-signal forwarding during deployment.

Use Value: Thermal shutdown at 175 °C prevents damage during prolonged seat heater operation; BAT-powered wake-up enables pre-ignition seat position recall.

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 BAT-supplied power-on flag.	Not suitable for systems requiring cold-start diagnostics or VCC-less wake-up; limited to simpler body nodes with stable 5 V rail.	Select TJA1054T/3 only if legacy design reuse is mandatory and VCC-independent wake-up is not required.
MCP2551-I/P	Standard high-speed CAN (1 Mbps); no single-wire fallback; no BAT-supplied wake-up; higher sleep current (>100 µA).	Designed for powertrain or chassis networks-not certified for low-speed fault-tolerant body applications per ISO 11898-3.	Use MCP2551-I/P only in non-fault-tolerant, high-speed CAN systems where wiring integrity is guaranteed and low-power operation is secondary.

Compared with TJA1054T/3 and MCP2551-I/P, the TJA1055T/C,518 uniquely delivers VCC-free wake-up, certified fault-tolerance per ISO 11898-3, and sub-40 µA sleep current-making it the only viable choice for modern automotive body electronics requiring fail-operational communication and extended battery-off runtime.

Availability

TJA1055T/C,518 is available at Aetrix Electronics and suitable for body control modules, door electronics, roof consoles, and seat control units requiring stable component supply across automotive production lifecycles.

Supply support for TJA1055T/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, with deep expertise in secure connectivity and embedded processing.

The TJA1055 belongs to NXP's automotive CAN transceiver family, engineered specifically for ISO 11898-3-compliant low-speed fault-tolerant networks in passenger vehicles-prioritizing reliability, ESD robustness, and ultra-low-power operation.

FAQ

What is the maximum baud rate supported by the TJA1055T/C,518?

The TJA1055T/C,518 supports a maximum baud rate of 125 kBd, compliant with ISO 11898-3 for low-speed fault-tolerant CAN networks. This rate is optimized for body electronics applications such as door modules and lighting control, where deterministic latency and wiring robustness outweigh raw speed requirements. The device maintains signal integrity across unshielded twisted-pair cabling at this rate due to integrated slope control and matched CANH/CANL output drivers.

Does the TJA1055T/C,518 support wake-up functionality without VCC applied?

Yes, the TJA1055T/C,518 supports full wake-up signaling via ERR and RXD outputs using only the BAT supply - even when VCC is absent. This capability is enabled by dedicated BAT-powered circuitry for the failure detector, wake-up comparator, and output drivers. During sleep mode, a remote bus wake-up frame or local edge on WAKE pin asserts active-LOW on ERR/RXD, allowing the host MCU to power up and re-enable VCC before resuming communication.

How does the TJA1055T/C,518 handle bus wiring failures?

The TJA1055T/C,518 detects seven defined bus failures (e.g., CANH short-to-battery, CANL open, CANH/CANL mutual short) using dedicated comparators and time-out logic. Upon detection, it automatically switches to single-wire transmission - driving only CANH or only CANL - while maintaining receiver functionality. Recovery to differential mode occurs automatically after consecutive recessive bits are detected, ensuring seamless restoration of full bandwidth without MCU intervention.

What package type is used for the TJA1055T/C,518?

The TJA1055T/C,518 is housed in an SO14 package (SOT108-1): a plastic small-outline package with 14 leads and 3.9 mm body width. This RoHS-compliant surface-mount package supports standard reflow profiles and is pin-compatible with earlier TJA1054 variants, enabling drop-in upgrades in existing automotive PCB designs without layout changes.

Is the TJA1055T/C,518 compatible with 3 V microcontrollers?

The TJA1055T/C,518 variant is designed for 5 V microcontroller interfacing (VCC = 4.75–5.25 V). For 3 V systems, NXP offers the TJA1055T/3 variant, which features modified input thresholds and open-drain outputs compatible with 2.4–3.6 V logic. The TJA1055T/C,518 itself does not support direct 3 V MCU interfacing - its TXD, STB, and EN inputs require VIH ≥ 2.2 V but are specified for 5 V operation and lack 3 V tolerant clamping.

TJA1055T/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/C,518 FAQ

1.How can I place an order for TJA1055T/C,518 through Aetrix?

Please submit a Request for Quotation (RFQ) for TJA1055T/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/C,518 reliable?

The price and inventory of TJA1055T/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/C,518 is usually 5 days.

3.What payment methods are accepted for TJA1055T/C,518?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TJA1055T/C,518 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TJA1055T/C,518?

TJA1055T/C,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TJA1055T/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/C,518?

For technical support, including TJA1055T/C,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1055T/C,518 requirements.

6.How does Aetrix verify that TJA1055T/C,518 is sourced from the original manufacturer or authorized distributors?

All TJA1055T/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/C,518 meets industry standards.

7.What is the process for return or replacement of TJA1055T/C,518?

All TJA1055T/C,518 units undergo pre-shipment inspection (PSI). If there is an issue with TJA1055T/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/C,518 part is unused and in its original packaging.

Return procedure for TJA1055T/C,518:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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