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TJA1086G Datasheet

FlexRay active star coupler

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TJA1086G
FlexRay active star coupler
Rev. 1 — 13 July 2017
Product data sheet
1. General description
The TJA1086G is a FlexRay active star coupler that connects two branches of a FlexRay
network. The TJA1086G is compliant with the FlexRay electrical physical layer
specification V3.0.1/ISO17458-4 (see Ref. 1 and Ref. 2).
Several TJA1085G and TJA1086G devices can be connected via their TRXD0/1
interfaces to increase the number of branches in the network. A dedicated
Communication Controller (CC) interface allows for integration into an ECU. The
TJA1086G supports low-power management by offering bus wake-up capability along
with battery supply and voltage regulator control. The TJA1086G meets industry
standards for EMC/ESD performance and provides enhanced bus error detection, low
current consumption and unmatched asymmetric delay performance.
2. Features and benefits
2.1 General
Compliant with FlexRay Electrical Physical Layer specification V3.0.1/ISO17458-4
Automotive product qualification in accordance with AEC-Q100
Data transfer rates from 2.5 Mbit/s to 10 Mbit/s
Supports 60 ns minimum bit time at 400 mV differential voltage
Low-power management for battery-supplied ECUs
Very low current consumption in AS_Sleep mode
Leadless HVQFN44 package with improved Automated Optical Inspection (AOI)
capability
2.2 Functional
Supports autonomous active star operation independent of the host ensuring the
TJA1086G remains active even if the host fails or is switched off
Branches can be independently configured
Branch extension via TRXD0/1 inner star interface
16-bit bidirectional SPI interface up to 2 Mbit/s for host communication
Full host control over branch status
Enhanced wake-up capability:
Remote wake-up via wake-up pattern and dedicated FlexRay data frames
Local wake-up via pin LWU
Wake-up source recognition
configurable per branch
Enhanced supply voltage monitoring on VIO, VCC, VBUF and VBAT


NXP Semiconductors Electronic Components Datasheet

TJA1086G Datasheet

FlexRay active star coupler

No Preview Available !

NXP Semiconductors
TJA1086G
FlexRay active star coupler)
Auto I/O level adaptation to host controller supply voltage VIO
Can be used in 14 V, 24 V and 48 V powered systems
Enhanced bus error detection - detects short-circuit conditions on the bus
Instant transmitter shut-down interface (BGE pin)
Selective branch shut-down (partial networking)
2.3 Robustness
Bus pins protected against 8 kV ESD pulses according to HBM and 6 kV ESD
pulses according to IEC61000-4-2
All pins protected against 1000 V ESD according to CDM
All pins protected against 200 V ESD according to MM
No reverse currents from the digital input pins to VIO or VCC when the TJA1086G is not
powered up
Bus pins short-circuit proof to battery voltage (14 V, 24 V or 48 V) and ground
Overtemperature detection and protection
Bus pins protected against transients in automotive environment (according to ISO
7637 class C)
2.4 Active star functional classes
Active star - communication controller interface
Active star - bus guardian interface
Active star - voltage regulator control
Active star - logic level adaptation
Active star - host interface
Active star - increased voltage amplitude transmitter
TJA1086G
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 13 July 2017
© NXP B.V. 2017. All rights reserved.
2 of 64


Part Number TJA1086G
Description FlexRay active star coupler
Maker NXP
Total Page 3 Pages
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