NXP的flexray收发器芯片TJA1080A

2.3 Diagnosis (detection and signalling)
Overtemperature detection Short-circuit on bus lines VBAT power-on flag (first battery connection and cold start) Pin TXEN and pin BGE clamping Undervoltage detection on pins VBAT, VCC and VIO Wake source indication
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NXP Semiconductors
TJA1080A
FlexRay transceiver
3. Ordering information
Table 1. Ordering information Package Name TJA1080ATS/2/T SSOP20 Description plastic shrink small outline package; 20 leads; body width 5.3 mm Version SOT339-1 Type number
2.2 Low power management
Low power management including two inhibit switches Very low current in Sleep and Standby modes Local and remote wake-up Supports remote wake-up via dedicated data frames Wake-up source recognition Automatic power-down (in Star-sleep mode) in star configuration
WAKE
15
WAKE-UP DETECTION
OVERTEMPERATURE DETECTION
OSCILLATOR LOWPOWER RECEIVER
UNDERVOLTAGE DETECTION
16
015aaa051
GND
Fig 1.
Block diagram
TJA1080A
All information provided in this document is subject to legal disclaimers.
TJA1080A
FlexRay transceiver
Rev. 5 — 24 February 2011 Product data sheet
1. General description
The TJA1080A is a FlexRay transceiver that is fully compliant with the FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1). In addition, it incorporates features and parameters included in V3.0.1 (see Ref. 2 and Section 14). It is primarily intended for communication systems from 1 Mbit/s to 10 Mbit/s, and provides an advanced interface between the protocol controller and the physical bus in a FlexRay network. The TJA1080A can be configured to be used as an active star transceiver or as a node transceiver. The TJA1080A provides differential transmit capability to the network and differential receive capability to the FlexRay controller. It offers excellent EMC performance as well as high ESD protection. The TJA1080A actively monitors the system performance using dedicated error and status information (readable by any microcontroller), as well as internal voltage and temperature monitoring. The TJA1080A supports the mode control as used in NXP Semiconductors TJA1054 (see Ref. 3) and TJA1041 (see Ref. 4) CAN transceivers. The TJA1080A is the next step up from the TJA1080 FlexRay transceiver (Ref. 5). Being fully pin compatible and offering the same excellent ESD protection, the TJA1080A also features:
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NXP Semiconductors
源自文库
TJA1080A
FlexRay transceiver
4. Block diagram
VIO 4 VCC 19 VBUF 20 VBAT 14 1 2
INH2 INH1
TJA1080A
TRXD0
11
18 SIGNAL ROUTER TRXD1 10 TRANSMITTER 17
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 24 February 2011
4 of 49
NXP Semiconductors
TJA1080A
FlexRay transceiver
5. Pinning information
BP BM
VIO
TXD TXEN BGE STBN EN
5 6 8 9 3 INPUT VOLTAGE ADAPTATION BUS FAILURE DETECTION
RXD ERRN RXEN
7 13 12 VBAT
OUTPUT VOLTAGE ADAPTATION
RXDINT STATE MACHINE RXDINT NORMAL RECEIVER
2. Features and benefits
2.1 Optimized for time triggered communication systems
Compliant with FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1) Automotive product qualification in accordance with AEC-Q100 Data transfer up to 10 Mbit/s Support of 60 ns minimum bit time
2.5 Functional classes according to FlexRay electrical physical layer specification (see Ref. 1)
Bus driver voltage regulator control Bus driver - bus guardian control interface Bus driver logic level adaptation Active star - communication controller interface Active star - bus guardian interface Active star voltage regulator control
NXP Semiconductors
TJA1080A
FlexRay transceiver
Very low EME to support unshielded cable Differential receiver with high common-mode range for ElectroMagnetic Immunity (EMI) Auto I/O level adaptation to host controller supply voltage VIO Can be used in 14 V and 42 V powered systems Instant shut-down interface (via BGE pin) Independent power supply ramp-up for VBAT, VCC and VIO Transceiver can be used for linear passive bus topologies as well as active star topologies
This makes the TJA1080A an excellent choice in any kind of FlexRay node. See Section 14 for a detailed overview of differences between the TJA1080 and the TJA1080A.
• • • •
Improved power-on reset concept Improved ElectroMagnetic Emission (EME) Support of 60 ns minimum bit time Improved bus error detection functionality
2.4 Protection
Bus pins protected against 8 kV HBM ESD pulses Bus pins protected against transients in automotive environment (according to ISO 7637 class C) Bus pins short-circuit proof to battery voltage (14 V and 42 V) and ground Fail-silent behavior in case of an undervoltage on pins VBAT, VCC or VIO Passive behavior of bus lines in the event that transceiver is not powered
TJA1080A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 24 February 2011
TJA1080A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 24 February 2011