TJA1085G FlexRay Active Star Coupler | NXP Semiconductors

FlexRay Active Star Coupler – 4 Branch

Block Diagram

TJA1085G

TJA1085G Block Diagram

Features

General Features

  • 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

Functional

  • Supports autonomous active star operation independent of the host ensuring the TJA1085G 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
  • 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)

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 TJA1085G 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)

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

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Buy/Parametrics

1 result

Include 0 NRND

Order

CAD Model

Status

Features

Additional Features - Analog

Supply Voltage [Min to Max] (V)

Battery supply voltage [Min - Max] (V)

Data Rate [min] kbps

Data Rate [max] kbps

Flexray

Voltage on bus pins [Min-Max] (V)

VESD HBM on bus pins (+/- kV)

VESD IEC on bus pins (+/- kV)

Junction Temperature (Min) (℃)

Junction Temperature (Max) (℃)

Protection

Wake-Up Pin

Product Application

Package Type

Active

FlexRay EPL v3.0.1

Sleep Mode, Standby Mode

4.75 to 5.25

4.75 to 60

2500.0

10000.0

4

-60 to 60

-8 to 8

-6 to 6

-40

150

overtemperature, undervoltage detection

Y

Automotive

HVQFN44

Documentation

Quick reference to our documentation types.

3 documents

Compact List

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