AS8222-HSSM

high performance needs great design. Datasheet: AS8222 Enhanced FlexRay Standard Transceiver Please be patient while we update our brand image as austriamicrosystems and TAOS are now ams. www.ams.com AS8222 E n h a n c e d F l e x R a y S t a n d a r d Tr a n s c e i v e r 1 General Description The AS8222 is a high-speed fault tolerant device operating as interface between a generic FlexRay Communication Controller and the copper wiring. This device is the first FlexRay certified Transceiver for temperature ranges up to 150°C ambient temperature. For bare-die deliveries please contact ams for more information. The AS8222 is designed to extend the application range for high speed and safety critical time triggered bus systems in an automotive environment. The bus driver is protected against short circuits to the supply and GND. The AS8222 operates at baudrates up to 10 Mbps and is fully conforming to the FlexRay Electrical Physical Layer Specification V2.1 Rev B. The AS8222 provides a host controller interface consisting of Enable (EN) and Standby (STBN) input pins for mode handling by the microcontroller and the Error (ERRN) output pin, signalling failures and status information. Interface with optional bus guardian for bus supervision Automatic thermal shutdown protection Supports 12, 24V systems with low sleep current consumption Integrated power management system Two INH pins for the external voltage regulators control Local wake-up input Remote wake-up capability via FlexRay bus in sleep mode Supports 2.5, 3, 3.3, 5 V microcontrollers and automatically adapts to interface levels Does not disturb the bus line if not powered Protected against damage due to short circuit conditions on the bus (positive and negative battery voltage) Small Pb-free package: SSOP-20 Automotive qualified to AEC-Q100, grade 0 For bare-die deliveries please contact us. The device supports the NORMAL mode with activated FlexRay bus transmitter and receiver, the RECEIVE_ONLY mode with activated receiver only to avoid unwanted disturbances while listening to the communication and the low-power modes STANDBY and SLEEP with very low power consumption. 3 Applications In case of undervoltage at one of the supply voltages (VBAT, VCC, and VIO) the device will change its mode to a low-power mode (either STANDBY or SLEEP mode) and the device will signal an error accordingly. In case of low voltage is detected on both VBAT and VCC the device will enter the POWER-OFF mode. The device addresses all ECUs connected to the permanent battery supply (terminal 30). Ensuring application in safety critical environments a two wire busguardian interface is implemented where additional redundant circuitries on the electronic-control-unit can monitor the communication on the receive enable output (RxEN) and can activate and deactivate through the bus guardian enable input (BGE) the transmitter. Additionally in low-power modes the wake conditions at the RxEN pin can be monitored. The AS8222 FlexRay Standard Transceiver is best fitting for automotive FlexRay nodes where bus wake-up and voltage regulator control for voltage supplies is needed. The device is best suited for high temperature applications with up to 150°C. A thermal sensor circuit with an integral shutdown mechanism prevents damage to the device in extreme temperature conditions. 2 Key Features Data transfer up to 10 Mbps Compliant with FlexRay Electrical Physical Layer Specification V2.1 Rev. B Wide operating ambient temperature range -40°C to +150°C Excellent EMC performance High common mode range insures excellent EMI immunity www.ams.com/eng/FlexRay/AS8222 Revision 1.0 1 - 42 AS8222 Datasheet - A p p l i c a t i o n s Figure 1. AS8222 Enhanced FlexRay Standard Transceiver Block Diagram VIO AS8222 Bus Failure Detector STBN EN Host Controller Interface ERRN VIO RxD TxD TxEN Communication Controller Interface BGE Bus Guardian Interface RxEN BP Digital Logic Transmitter BM Receiver VBAT VBAT www.ams.com/eng/FlexRay/AS8222 Revision 1.0 WAKE GND VIO VBAT INH2 Wake-Up Detector Power Supply Interface VCC INH1 2 - 42 AS8222 Datasheet - C o n t e n t s Contents 1 General Description .................................................................................................................................................................. 1 2 Key Features............................................................................................................................................................................ 1 3 Applications............................................................................................................................................................................... 1 4 Pin Assignments ....................................................................................................................................................................... 5 4.1 Pin Descriptions.................................................................................................................................................................................... 5 5 Absolute Maximum Ratings ...................................................................................................................................................... 6 6 Electrical Characteristics........................................................................................................................................................... 8 6.1 Supply Voltage...................................................................................................................................................................................... 8 6.2 State Transitions.................................................................................................................................................................................. 9 6.3 Transmitter............................................................................................................................................................................................ 9 6.4 Receiver ............................................................................................................................................................................................. 11 6.5 Wake-up Detector............................................................................................................................................................................... 13 6.6 Supply Voltage Monitor....................................................................................................................................................................... 14 6.7 Bus Error Detection ............................................................................................................................................................................ 15 6.8 Over Temperature............................................................................................................................................................................... 15 6.9 Power Supply Interface ...................................................................................................................................................................... 15 6.10 Communication Controller Interface ................................................................................................................................................. 15 6.11 Host Interface ................................................................................................................................................................................... 17 6.12 Bus Guardian Interface..................................................................................................................................................................... 18 6.13 Read Out Interface ........................................................................................................................................................................... 7 Detailed Description................................................................................................................................................................ 18 19 7.1 Block Description................................................................................................................................................................................ 19 7.2 Events................................................................................................................................................................................................. 19 7.3 Operating Modes ................................................................................................................................................................................ 19 7.3.1 7.3.2 7.3.3 7.3.4 7.3.5 NORMAL Mode ......................................................................................................................................................................... RECIEVE-ONLY Mode .............................................................................................................................................................. STANDBY Mode........................................................................................................................................................................ GO-TO-SLEEP Mode ................................................................................................................................................................ SLEEP Mode ............................................................................................................................................................................. 7.4 Non-Operating Modes ........................................................................................................................................................................ 20 20 20 20 20 20 7.4.1 POWER-OFF Mode................................................................................................................................................................... 20 7.5 Undervoltage Events .......................................................................................................................................................................... 20 7.5.1 Undervoltage / Voltage Recovery VBAT .................................................................................................................................... 21 7.5.2 Undervoltage / Voltage Recovery VIO ....................................................................................................................................... 21 7.5.3 Undervoltage / Voltage Recovery VCC ...................................................................................................................................... 21 7.6 Power On/Off Events.......................................................................................................................................................................... 21 7.7 Wake-Up Events................................................................................................................................................................................. 21 7.7.1 Remote Wake-Up Event ............................................................................................................................................................ 21 7.7.2 Remote Wake-up with Frames .................................................................................................................................................. 21 7.7.3 Local Wake-Up Event ................................................................................................................................................................ 22 7.8 Over-temperature Events ................................................................................................................................................................... 22 7.9 System Description............................................................................................................................................................................. 23 7.10 Fail Silent Behaviour......................................................................................................................................................................... 24 7.10.1 RxEN / BGE Timeout............................................................................................................................................................... 24 7.10.2 State Transitions due to Undervoltage Detection .................................................................................................................... 24 www.ams.com/eng/FlexRay/AS8222 Revision 1.0 3 - 42 AS8222 Datasheet - C o n t e n t s 7.10.3 State Transitions due to Voltage Recovery Detection ............................................................................................................. 24 7.11 Mode Transitions .............................................................................................................................................................................. 24 7.11.1 Error Pin Signalling .................................................................................................................................................................. 27 7.12 Loss of Ground ................................................................................................................................................................................. 7.13 ERROR Flags Description................................................................................................................................................................ 7.13.1 Undervoltage Detected VBAT Flag .......................................................................................................................................... 7.13.2 Undervoltage Detected VIO Flag ............................................................................................................................................. 7.13.3 Undervoltage Detected VCC Flag............................................................................................................................................ 7.13.4 Bus Error.................................................................................................................................................................................. 7.13.5 Bus Open Line ......................................................................................................................................................................... 7.13.6 BP Short Circuit to VCC ........................................................................................................................................................... 7.13.7 BP Short Circuit to GND .......................................................................................................................................................... 7.13.8 BM Short Circuit to VCC .......................................................................................................................................................... 7.13.9 BM Short Circuit to GND.......................................................................................................................................................... 7.13.10 Short Circuit between BP and BM ......................................................................................................................................... 7.13.11 Over-temperature .................................................................................................................................................................. 7.13.12 TxEN_BGE Timeout .............................................................................................................................................................. 7.13.13 Error Flag............................................................................................................................................................................... 7.14 STATUS Flags Description ............................................................................................................................................................... 27 27 27 27 27 27 27 27 28 28 28 28 28 28 28 28 7.14.1 Local and Remote Wake Flag ................................................................................................................................................. 28 7.14.2 Power on Flag.......................................................................................................................................................................... 28 7.14.3 BGE Status .............................................................................................................................................................................. 28 7.15 Error and Status Flags Read Out ..................................................................................................................................................... 8 Bus Driver ............................................................................................................................................................................... 29 30 8.1 AS8222 Bus States ............................................................................................................................................................................ 30 8.2 Transceiver Timing ............................................................................................................................................................................. 30 8.3 Transmitter.......................................................................................................................................................................................... 31 8.4 Receiver ............................................................................................................................................................................................. 33 8.4.1 Bus activity and idle detection (only in NORMAL and RECEIVE ONLY mode)......................................................................... 33 8.4.2 Bus Data Detection (Only in NORMAL and RECEIVE ONLY Mode) ........................................................................................ 34 8.4.3 Receiver Test Signal.................................................................................................................................................................. 35 9 Test circuits ............................................................................................................................................................................. 36 9.1 ISO7637-2 Test Pulses - Class D ....................................................................................................................................................... 36 9.2 Application Circuit............................................................................................................................................................................... 37 10 Appendix............................................................................................................................................................................... 38 10.1 FlexRay Functional Classes ............................................................................................................................................................. 38 10.2 FlexRay Parameter Comparison ...................................................................................................................................................... 38 11 Package Drawings and Markings.......................................................................................................................................... 39 12 Ordering Information............................................................................................................................................................. 40 www.ams.com/eng/FlexRay/AS8222 Revision 1.0 4 - 42 AS8222 Datasheet - P i n A s s i g n m e n t s 4 Pin Assignments The AS8222 is available in SSOP-20 5.3mm. Figure 2. Pin Assignments (Top View) INH2 1 20 - INH1 2 19 VCC EN 3 18 BP 17 BM GND VIO 4 TxD 5 AS8222 16 TxEN 6 (SSOP20) 15 WAKE RxD 7 14 VBAT BGE 8 13 ERRN STBN 9 12 RxEN - 10 11 - 4.1 Pin Descriptions Table 1. SSOP-20 Pin Descriptions Pin Name Pin Number INH2 1 INH1 2 EN 3 Digital Input with Pull-down VIO 4 Supply TxD 5 Digital Input with Pull-down TxEN 6 Digital Input with Pull-up RxD 7 Digital Output BGE 8 STBN 9 Reserved 10 Analog/digital Input/output with Pull-down Not used 11 - RxEN 12 ERRN 13 VBAT 14 Supply WAKE 15 Analog I/O GND 16 Supply BM 17 BP 18 VCC 19 Supply Not used 20 - www.ams.com/eng/FlexRay/AS8222 Pin Type Analog I/O Digital Input with Pull-down Digital Output Analog I/O Description Analog Output. Inhibit 2 output for switching external voltage regulator Analog Output. Inhibit 1 output for switching external voltage regulator Digital Input. Enable input Supply Voltage. I/O supply voltage Digital Input. Transmit data input Digital Input. Transmitter enable input Digital Output. Receive data output Digital Input. Bus guardian enable input Digital Input. Standby input To be connected to GND or to be unconnected Digital Output. Receive data enable output Digital Output. Error diagnosis output and wake status output Supply Voltage. Battery supply voltage Analog Input. Local wake-up input Ground Analog Input/Output. Bus line Minus Analog Input/Output. Bus line Plus Supply voltage. - Revision 1.0 5 - 42 AS8222 Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in Absolute Maximum Ratings is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: All voltages are referred to pin GND. Table 2. Absolute Maximum Ratings Symbol Parameter Min Max Units Note Battery Supply Voltage -0.3 +50 V -0.3 +7.0 V -0.3 +7.0 V DC Voltage at EN, STBN, ERRN, TxD, RxD, TxEN, BGE, RxEN -0.3 VIO +0.3 V DC Voltage on pin WAKE, INH1, INH2 -0.3 VBAT +0.3 DC Voltage at BP and BM -40 +40 V Input current (latchup immunity) -100 100 mA According to JEDEC 78 Electrical Parameters VBAT VCC Supply Voltage VIO VIO < VCC Electrostatic Discharge ESD Electrostatic Discharge ±2 kV All pins AEC-Q100-002 (HBM) uESDInt 2 kV ESD on all other pins Electrostatic Discharge ±4 kV For VBAT, GND, WAKE AEC-Q100-002 (HBM) uESDExt 4 kV ESD protection on pins that lead to ECU external terminals Electrostatic Discharge ±6 kV BP, BM AEC-Q100-002 (HBM) uESDExt 4 kV ESD protection on pins that lead to ECU external terminals Electrostatic Discharge ±6 kV BP, BM FlexRay Physical Layer EMC Measurement Specification Version 3.0 ±500 V ±750 V ±100 V Electrostatic Discharge www.ams.com/eng/FlexRay/AS8222 Revision 1.0 On all pins AEC-Q100-011 (Charge Device Model) At the corner pins AEC-Q100-011 (Charge Device Model) On all pins AEC-Q100-003 (Machine Model) 6 - 42 AS8222 Datasheet - A b s o l u t e M a x i m u m R a t i n g s Table 2. Absolute Maximum Ratings Symbol Parameter Min Max Units Note V ISO7637-2 test pulse 1; class D (see Figure 14) V ISO7637-2 test pulses 2a; class D (see Figure 14) V ISO7637-2 test pulses 3a; class D (see Figure 14) +100 V ISO7637-2 test pulses 3b; class D (see Figure 14) 150 mW +150 ºC 260 ºC 85 % Damage Tests -100 Us Transient voltage on VBAT, Bus and Wake pins (damage tests) +75 -150 Power Dissipation Pt Total power dissipation (all supplies and outputs) Temperature Ranges and Storage Conditions Tstrg Storage temperature -55 TBODY Package body temperature H Humidity non-condensing MSL Moisture Sensitivity Level 1 2 5 3 1. The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for Pb-free leaded packages is matte tin (100% Sn). 2. Represents a maximum floor life time of 168h. www.ams.com/eng/FlexRay/AS8222 Revision 1.0 7 - 42 AS8222 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics In this specification, all the defined tolerances for external components are assured over the whole operation conditions range as well as over lifetime. Operation Range: TAMB=-40ºC to +150ºC, VCC=+4.75V to +5.25V, VBAT=5.5V to +40V, VIO=+2.2 to VCC, RL=40Ω, CL= 100pF unless otherwise specified. 6.1 Supply Voltage Table 3. Supply Voltage Symbol Parameter TAMB Conditions Min Typ Max Units Ambient temperature -40 +25 +150 ºC T Ambient temperature -40 +125 ºC VCC-VIO Difference of supplies -0.1 3.05 V VBAT=12V; SLEEP mode; IBAT VBAT current consumption (standard transceiver only) 0 30 50 µA 0 80 170 µA 0 0.24 1 mA -5 10 20 µA Non-low-power mode: NORMAL, driver enabled 15 25 45 mA Non-low-power mode: NORMAL, driver enabled; RBUS= ∞Ω 3 7 15 mA Non-low-power mode: RECEIVE-ONLY 1 2 10 mA -5 2 20 µA 0 0.02 1 mA TAMB