TJA1055T/C - 125 kBd Fault-Tolerant CAN Transceiver | NXP
MPN: TJA1055T/C ✓ ActiveTJA1055T/C Overview
A CAN transceiver is the physical-layer interface within a Controller Area Network. A CAN controller generates and interprets digital frames, while the transceiver converts controller signals into differential bus levels and converts differential bus signals back into logic-level receive data. The TJA1055T/C belongs to the CAN interface transceiver hierarchy, connecting network-interface ICs with the CAN bus wiring in automotive electronics.
The TJA1055 is described by NXP as an enhanced fault-tolerant CAN transceiver. Its intended maximum signaling rate of 125 kBd suits low-speed passenger-car networks, while its 4.75 V to 5.25 V operating supply supports conventional 5 V CAN-controller systems. The 14-SO package also gives PCB designers a recognizable, surface-mount option for compact automotive and industrial control assemblies.
Compared with the earlier TJA1054 family, the manufacturer describes the TJA1055 as an enhanced version with additional improvements. The fault-tolerant interface role allows a CAN node to maintain communication when bus faults occur within the application's specified operating limits. Designers should still verify fault behavior, termination requirements, bus topology, and controller compatibility against the complete manufacturer datasheet before production release.
Typical uses include automotive body-control modules, passenger-compartment controllers, comfort systems, diagnostic interfaces, and other distributed electronic systems that exchange low-speed CAN messages. The TJA1055T/C can also support laboratory CAN-interface prototypes where a 125 kBd fault-tolerant physical layer is required and 5 V logic compatibility is appropriate.
PCB implementation requires correct CAN routing, provision of the bus termination defined by the network design, and a stable 5 V supply. Place the transceiver and its associated decoupling close to the CAN connector and controller interfaces, and route the differential CAN_H and CAN_L pair together without unnecessary stubs. Confirm logic thresholds, loopback behavior, bus-fault recovery, and timing margins in the target system.
This page combines the manufacturer's product identity, core electrical ratings, package information, application guidance, cross-reference findings, and practical design considerations. It also identifies which parameters require confirmation from the full TJA1055 data sheet, helping engineers move from part selection to a defensible PCB design without overlooking CAN-specific implementation details.
Drop-in alternatives for TJA1055T/C — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
TJA1055T/3/C,518
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1055T/C Specifications
| Product Type | Fault-tolerant CAN transceiver |
| Maximum CAN Data Rate | 125 kBd |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Transmit Buffers | 1 |
| Receive Buffers | 1 |
| Interface Type | Serial CAN interface |
| Package | 14-SO, 14-pin surface-mount package |
| Pin Count | 14 pins |
| Mounting Type | Surface mount |
| Primary Network | Controller Area Network (CAN) |
| Intended Application | Low-speed passenger-car systems up to 125 kBd |
| Fault Tolerance | Fault-tolerant CAN interface |
TJA1055T/C 14-so, 14-pin surface-mount package Pin Configuration Guide
Pin configuration for TJA1055T/C (14-so, 14-pin surface-mount package package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TJA1055T/C.
Refer to the datasheet for full pin configuration.
Typical Applications
TJA1055T/C is suitable for 6 applications: Automotive Body-Control Modules, Passenger-Comfort Systems, Automotive Diagnostic Interfaces, Industrial CAN Sensor Hubs, Low-Speed Vehicle Network Gateways, CAN Communication Test Equipment.
Automotive Body-Control Modules
The TJA1055T/C fits distributed body-control systems that exchange low-speed CAN messages for doors, windows, lighting, and seating. Its fault-tolerant CAN transceiver role and 125 kBd maximum data rate align with passenger-car networks, while the 4.75 V to 5.25 V supply range supports conventional 5 V electronics. Place the transceiver between the CAN controller and the CAN_H/CAN_L bus, provide the network's specified termination, and confirm fault thresholds against the complete NXP data sheet.
Recommended
Passenger-Comfort Systems
Passenger-comfort controllers commonly distribute commands among seat, climate, lighting, and access modules over low-speed CAN. The TJA1055T/C supports this role with a 125 kBd data-rate ceiling and one transmit and one receive channel. Its 14-SO surface-mount package simplifies compact controller layouts, although the designer must preserve controlled bus impedance and provide termination only where required by the network topology.
Recommended
Automotive Diagnostic Interfaces
A diagnostic interface can use the TJA1055T/C as the physical CAN layer between a diagnostic controller and vehicle bus wiring. Its fault-tolerant interface is appropriate for low-speed passenger-car communication up to 125 kBd, and its 5 V supply range fits many embedded diagnostic controllers. Designers should verify receive thresholds, dominant and recessive behavior, standby operation, and recovery from bus faults against the complete manufacturer data sheet.
Recommended
Industrial CAN Sensor Hubs
The TJA1055T/C can serve as a fault-tolerant physical interface in a 5 V industrial sensor hub that uses low-speed CAN for distributed measurements. The 125 kBd limit is appropriate for many supervisory and status networks rather than high-bandwidth factory automation. Use a single bus controller to exchange commands and sensor reports, route CAN_H and CAN_L as a pair, and validate the hub's grounding and isolation strategy.
Recommended
Low-Speed Vehicle Network Gateways
A gateway can combine several low-speed vehicle domains by terminating one CAN segment in the TJA1055T/C and forwarding data through an embedded controller. Its 125 kBd capability matches legacy passenger-car networks, while the 14-SO package allows implementation in compact electronic control units. The gateway must avoid excessive stub lengths, implement the termination specified for each segment, and account for propagation delay when scheduling bus traffic.
Recommended
CAN Communication Test Equipment
Laboratory and service equipment for low-speed CAN networks can use the TJA1055T/C as a physical-layer interface. The device's 125 kBd capability supports legacy passenger-car bus simulation and troubleshooting, while the 4.75 V to 5.25 V supply range integrates with 5 V test electronics. Confirm logic compatibility, loopback behavior, fault injection limits, and bus termination before connecting it to external vehicle wiring.
Recommended
Recommended Products Summary
Engineering reference data for TJA1055T/C — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1055T/3/C,518 |
|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors |
| Package | 14-SO | 14-SO - same package |
| Product Type | Fault-tolerant CAN transceiver | Fault-tolerant CAN transceiver |
| Maximum Data Rate | 125 kBd | 125 kBd family rating |
| Supply Voltage Range | 4.75 V to 5.25 V | 4.75 V to 5.25 V family rating |
| Network Interface | Serial Controller Area Network | Serial Controller Area Network |
| Intended Application | Low-speed passenger-car systems | Low-speed passenger-car systems |
| Fault Tolerance | Fault-tolerant CAN interface | Fault-tolerant CAN interface |
Key Differentiators
- Enhanced fault-tolerant CAN physical layer (vs TJA1054T)
- Documented 125 kBd family data rate (vs TJA1055T/3/C,518)
- Compatible 5 V supply window (vs TJA1055T/3/C,518)
- Established 14-SO physical footprint (vs TJA1055T/3/C,518)
Design Notes
Route CAN_H and CAN_L as a tightly coupled differential pair from the TJA1055T/C to the bus connector. Keep the pair geometry consistent, minimize vias and stub branches, and place the transceiver close to the connector when ESD or isolation structures are present. Provide the network's specified termination at the physical bus endpoints rather than adding termination indiscriminately at every node.
Decouple the 4.75 V to 5.25 V supply locally at the transceiver and follow the capacitor values and placement guidance in the manufacturer data sheet. Confirm that the controller and transceiver use compatible logic thresholds. When the controller operates from another supply domain, verify level compatibility or add an appropriate interface rather than assuming that nominal 5 V operation guarantees matching thresholds.
Do not treat the 125 kBd maximum as permission to use arbitrary cable lengths or branch structures. Bus length, propagation delay, termination, topology, and transceiver timing jointly determine whether the network remains reliable. Also distinguish device-grade and packing suffixes during procurement, and validate the exact ordering code against the manufacturer's ordering table before releasing a production BOM.
For low-speed CAN networks, maintain a consistent common-mode environment and use the termination strategy specified by the system architecture. Place protection components close to the connector and select their capacitance and standoff behavior carefully so that they do not distort bus edges. Validate dominant-state amplitude, recessive-state behavior, and recovery from shorted or open-bus faults in the final wiring environment.
Compliance Information
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was present in the cited product information. Confirm current compliance and automotive qualification with NXP using the exact ordering suffix.
