TJA1085G FlexRay Active Star Coupler | NXP Semiconductors

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FlexRay Active Star Coupler – 4 Branch

TJA1085G Active

The TJA1085G is a FlexRay active star coupler that can connect up to 4 branches of a FlexRay network. The TJA1085G is compliant with the FlexRay electrical physical layer specification V3.0.1/ISO17458-4

Several TJA1085G 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 TJA1085G supports low-power management by offering bus wake-up capability along with battery supply and voltage regulator control. The TJA1085G meets industry standards for EMC/ESD performance and provides enhanced bus error detection, low current consumption and unmatched asymmetric delay performance.

Block Diagram

TJA1085G

TJA1085G Block Diagram
Get diagram PDF

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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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

TJA1085GHN
Data Sheet

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

N true 0 PSPTJA1085Gen 3 Data Sheet Data Sheet t520 1 Package Information Package Information t790 1 Packing Information Packing Information t935 1 en_US en_US en Data Sheet Data Sheet 1 1 1.0 English 1488343279458698625500 PSP 866.5 KB None None documents None 1488343279458698625500 /docs/en/data-sheet/TJA1085G.pdf 866485 /docs/en/data-sheet/TJA1085G.pdf TJA1085G documents N N 2017-02-28 FlexRay active star coupler /docs/en/data-sheet/TJA1085G.pdf /docs/en/data-sheet/TJA1085G.pdf Data Sheet N 980000996212993340 2022-12-07 pdf N en Feb 28, 2017 980000996212993340 Data Sheet N FlexRay active star coupler PDF Package Information Package Information 1 2 1.2 English 1455079754998707200985 PSP 261.0 KB None None documents None 1455079754998707200985 /docs/en/package-information/SOT1113-1.pdf 260978 /docs/en/package-information/SOT1113-1.pdf SOT1113-1 documents N N 2016-10-08 plastic thermal enhanced very thin quad flat package; no leads; 44 terminals /docs/en/package-information/SOT1113-1.pdf /docs/en/package-information/SOT1113-1.pdf Package Information N 302435339416912908 2024-05-29 pdf N en Dec 2, 2002 302435339416912908 Package Information Y N plastic thermal enhanced very thin quad flat package; no leads; 44 terminals PDF Packing Information Packing Information 1 3 kb 1.0 English 1487306508331703998488 PSP 200.0 KB None None documents None 1487306508331703998488 /docs/en/packing/SOT1113-1_431.pdf 200000 /docs/en/packing/SOT1113-1_431.pdf SOT1113-1_431 documents N N 2017-02-16 HVQFN44; Reel pack, SMD, 13"
Q1/T1 standard product orientation
Orderable part number ending ,431 or Z
Ordering code (12NC) ending 431 /docs/en/packing/SOT1113-1_431.pdf /docs/en/packing/SOT1113-1_431.pdf Packing Information N 145666923842250347 Y 2022-12-07 PDF en Feb 28, 2017 145666923842250347 Packing Information 200.0 MB N /docs/en/packing/SOT1113-1_431.pdf HVQFN44; Reel pack, SMD, 13"
Q1/T1 standard product orientation
Orderable part number ending ,431 or Z
Ordering code (12NC) ending 431 PDF false 0 TJA1085G downloads en true 1 Y PSP Y Y Data Sheet 1 /docs/en/data-sheet/TJA1085G.pdf 2017-02-28 1488343279458698625500 PSP 1 Feb 28, 2017 Data Sheet PDF None /docs/en/data-sheet/TJA1085G.pdf English documents 866485 None 980000996212993340 2022-12-07 N /docs/en/data-sheet/TJA1085G.pdf FlexRay active star coupler /docs/en/data-sheet/TJA1085G.pdf documents 980000996212993340 Data Sheet N en None pdf 1.0 N N FlexRay active star coupler 866.5 KB TJA1085G N 1488343279458698625500 Package Information 1 /docs/en/package-information/SOT1113-1.pdf 2016-10-08 1455079754998707200985 PSP 2 Dec 2, 2002 Package Information PDF None /docs/en/package-information/SOT1113-1.pdf English documents 260978 None 302435339416912908 2024-05-29 N /docs/en/package-information/SOT1113-1.pdf plastic thermal enhanced very thin quad flat package; no leads; 44 terminals /docs/en/package-information/SOT1113-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.2 N N plastic thermal enhanced very thin quad flat package; no leads; 44 terminals 261.0 KB SOT1113-1 N 1455079754998707200985 Packing Information 1 /docs/en/packing/SOT1113-1_431.pdf 2017-02-16 1487306508331703998488 PSP 3 Feb 28, 2017 Packing Information PDF None /docs/en/packing/SOT1113-1_431.pdf English documents 200000 kb None 145666923842250347 2022-12-07 /docs/en/packing/SOT1113-1_431.pdf HVQFN44; Reel pack, SMD, 13"
Q1/T1 standard product orientation
Orderable part number ending ,431 or Z
Ordering code (12NC) ending 431 /docs/en/packing/SOT1113-1_431.pdf documents 145666923842250347 Packing Information N en None N PDF 1.0 N HVQFN44; Reel pack, SMD, 13"
Q1/T1 standard product orientation
Orderable part number ending ,431 or Z
Ordering code (12NC) ending 431 Y 200.0 KB 200.0 MB SOT1113-1_431 N /docs/en/packing/SOT1113-1_431.pdf 1487306508331703998488 true Y Products

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