Overview
The TJA1085HN,118, produced by NXP USA Inc., is a FlexRay active star coupler designed to connect up to 4 branches of a FlexRay network. This component is fully compliant with the FlexRay electrical physical layer specification V3.0.1/ISO17458-4, ensuring it meets the stringent requirements of automotive communication systems. The TJA1085 supports low-power management, enhanced bus error detection, and unmatched asymmetric delay performance, making it a reliable choice for automotive applications.
Key Specifications
| Specification | Details |
|---|---|
| Compliance | FlexRay electrical physical layer specification V3.0.1/ISO17458-4 |
| Number of Branches | Up to 4 branches |
| Data Transfer Rates | 2.5 Mbit/s to 10 Mbit/s |
| Minimum Bit Time | 60 ns at 400 mV differential voltage |
| Package Type | Leadless HVQFN44 package |
| Power Management | Low-power management with bus wake-up capability, battery supply, and voltage regulator control |
| Current Consumption | Very low current consumption in AS_Sleep mode |
| Interface | 16-bit bidirectional SPI interface up to 2 Mbit/s for host communication |
| Protection Features | Bus pins short-circuit proof to battery voltage (14 V, 24 V or 48 V) and ground; overtemperature detection and protection |
Key Features
- Autonomous Operation: The TJA1085 remains active even if the host fails or is switched off.
- Branch Configuration: Branches can be independently configured.
- Branch Extension: Branch extension via TRXD0/1 inner star interface.
- Host Communication: 16-bit bidirectional SPI interface up to 2 Mbit/s for host communication.
- Wake-Up Capability: Enhanced wake-up capability via wake-up pattern and dedicated FlexRay data frames.
- Protection and Detection: Bus pins protected against transients in automotive environment (according to ISO 7637 class C); overtemperature detection and protection.
- Low Power Consumption: Very low current consumption in AS_Sleep mode.
- JASPAR Compliance: Fulfills JASPAR requirements as defined by the Japanese car industry.
- AEC-Q100 Qualification: Automotive product qualification in accordance with AEC-Q100.
Applications
The TJA1085HN,118 is primarily used in automotive communication systems, particularly in FlexRay networks. It is suitable for various automotive applications where reliable and high-speed data communication is essential, such as in advanced driver-assistance systems (ADAS), autonomous vehicles, and other safety-critical systems.
Q & A
- What is the TJA1085HN,118 used for?
The TJA1085HN,118 is used as a FlexRay active star coupler to connect up to 4 branches of a FlexRay network in automotive communication systems.
- What standards does the TJA1085HN,118 comply with?
The TJA1085HN,118 complies with the FlexRay electrical physical layer specification V3.0.1/ISO17458-4 and fulfills JASPAR requirements.
- What are the data transfer rates supported by the TJA1085HN,118?
The TJA1085HN,118 supports data transfer rates from 2.5 Mbit/s to 10 Mbit/s.
- How does the TJA1085HN,118 manage power?
The TJA1085HN,118 offers low-power management with bus wake-up capability, battery supply, and voltage regulator control.
- What kind of protection features does the TJA1085HN,118 have?
The TJA1085HN,118 has bus pins short-circuit proof to battery voltage and ground, overtemperature detection, and protection against transients in automotive environments.
- Can the TJA1085HN,118 operate autonomously?
Yes, the TJA1085HN,118 can operate autonomously even if the host fails or is switched off.
- How can branches be extended in the TJA1085HN,118?
Branches can be extended via the TRXD0/1 inner star interface.
- What type of interface does the TJA1085HN,118 use for host communication?
The TJA1085HN,118 uses a 16-bit bidirectional SPI interface up to 2 Mbit/s for host communication.
- Is the TJA1085HN,118 qualified for automotive use?
Yes, the TJA1085HN,118 is qualified in accordance with AEC-Q100 for automotive use.
- What package type is the TJA1085HN,118 available in?
The TJA1085HN,118 is available in a leadless HVQFN44 package.
