TJA1040 High speed CAN transceiver

1 DATA SHEETP roduct specificationSupersedes data of 2003 Feb 192003 Oct 14 INTEGRATED CIRCUITSTJA1040 High speed CAN transceiver2003 Oct 142 Philips SemiconductorsProduct specificationHigh speed CAN transceiverTJA1040 FEATURES Fully compatible with the ISO 11898 standard High speed (up to 1 MBaud) Very low-current standby mode with remote wake -upcapability via the bus Very low ElectroMagnetic Emission (EME) Differential receiver with high common-mode range forElectroMagnetic Immunity (EMI) transceiver in unpowered state disengages from thebus (zero load) Input levels compatible with V and 5 V devices Voltage source for stabilizing the recessive bus level ifsplit termination is used (further improvement of EME) At least 110 nodes can be connected Transmit Data (TXD) dominant time-out function Bus pins protected against transients in automotiveenvironments Bus pins and pin SPLIT short-circuit proof to battery andground Thermally DESCRIPTIONThe TJA1040 is the interface between the Controller AreaNetwork (CAN) protocol controller and the physical is primarily intended for high speed applications, up to1 MBaud, in passenger cars.

2 The device providesdifferential transmit capability to the bus and differentialreceive capability to the CAN TJA1040 is the next step up from the TJA1050 highspeed CAN transceiver . Being pin compatible and offeringthe same excellent EMC performance, the TJA1040 alsofeatures: An ideal passive behaviour when supply voltage is off A very low-current standby mode with remote wake -upcapability via the makes the TJA1040 an excellent choice in nodeswhich can be in power-down or standby mode in partiallypowered REFERENCE DATAORDERING voltageoperating currentstandby mode515 AVCANHDC voltage on pin CANH0 < VCC< V; no time limit 27+40 VVCANLDC voltage on pin CANL0 < VCC< V; no time limit 27+40 VVSPLITDC voltage on pin SPLIT0 < VCC< V.

3 No time limit 27+40 VVesdelectrostatic discharge voltageHuman Body Model (HBM)pins CANH, CANL and SPLIT 6+6kVall other pins 4+4kVtPD(TXD-RXD)propagation delay TXD to RXD VSTB= 0 V40255nsTvjvirtual junction temperature 40+150 CTYPENUMBERPACKAGENAMEDESCRIPTIONVERSION TJA1040 TSO8plastic small outline package; 8 leads; body width mmSOT96-1 TJA1040U bare die; die dimensions 1 840 1440 380 m 2003 Oct 143 Philips SemiconductorsProduct specificationHigh speed CAN transceiverTJA1040 BLOCK DIAGRAM handbook, full pagewidthWAKE-UPMODE CONTROLDRIVERTEMPERATUREPROTECTIONV SPLITCANHCANLSPLITVCC5 TXDVCC1 STB8 RXD4376 wake -UPFILTERTIME-OUT & Block data inputGND2ground supplyVCC3supply voltageRXD4receive data output.

4 Reads out datafrom the bus linesSPLIT5common-mode stabilization outputCANL6 LOW-level CAN bus lineCANH7 HIGH-level CAN bus lineSTB8standby mode control inputhandbook, Pin Oct 144 Philips SemiconductorsProduct specificationHigh speed CAN transceiverTJA1040 FUNCTIONAL DESCRIPTIONO perating modesThe TJA1040 provides two modes of operation which areselectable via pin STB. See Table 1 for a description of themodes of 1 Operating modesNORMAL MODEIn this mode the transceiver is able to transmit and receivedata via the bus lines CANH and CANL. See for theblock diagram. The differential receiver converts theanalog data on the bus lines into digital data which isoutput to pin RXD via the multiplexer (MUX).

5 The slope ofthe output signals on the bus lines is fixed and optimizedin a way that lowest ElectroMagnetic Emission (EME) MODEIn this mode the transmitter and receiver are switched off,and the low-power differential receiver will monitor the buslines. A HIGH level on pin STB activates this low-powerreceiver and the wake -up filter, and after tBUS the state ofthe CAN bus is reflected on pin supply current on VCC is reduced to a minimum insuch a way that ElectroMagnetic Immunity (EMI) isguaranteed and a wake -up event on the bus lines will this mode the bus lines are terminated to ground toreduce the supply current (ICC) to a minimum. A diode isadded in series with the high-side driver of RXD to preventa reverse current from RXD to VCCin the unpowered normal mode this diode is bypassed.

6 This diode is notbypassed in standby mode to reduce current circuitPin SPLIT provides a DC stabilized voltage of on only in normal mode. In standby mode pin SPLITis floating. The VSPLIT circuit can be used to stabilize therecessive common-mode voltage by connecting pin SPLITto the centre tap of the split termination (see ). In caseof a recessive bus voltage < to the presence ofan unsupplied transceiver in the network with a significantleakage current from the bus lines to ground, the splitcircuit will stabilize this recessive voltage to So astart of transmission does not cause a step in thecommon-mode signal which would lead to poorElectroMagnetic Emission (EME) the standby mode the bus lines are monitored via alow-power differential comparator.

7 Once the low-powerdifferential comparator has detected a dominant bus levelfor more than tBUS, pin RXD will become detectionThe output drivers are protected against over-temperatureconditions. If the virtual junction temperature exceeds theshutdown junction temperature Tj(sd), the output drivers willbe disabled until the virtual junction temperature becomeslower than Tj(sd) and TXD becomes recessive including the TXD condition, the occurrence of outputdriver oscillation due to temperature drifts is dominant time-out functionA TXD dominant time-out timer circuit prevents the buslines from being driven to a permanent dominant state(blocking all network communication) if pin TXD is forcedpermanently LOW by a hardware and/or softwareapplication failure.

8 The timer is triggered by a negativeedge on pin the duration of the LOW level on pin TXD exceeds theinternal timer value (tdom), the transmitter is disabled,driving the bus lines into a recessive state. The timer isreset by a positive edge on pin TXD. The TXD dominanttime-out time tdomdefines the minimum possible bit rate of40 featuresPin TXD provides a pull-up towards VCCin order to force arecessive level in case pin TXD is STB provides a pull-up towards VCC in order to forcethe transceiver into standby mode in case pin STB the event that the VCC is lost, pins TXD, STB and RXDwill become floating to prevent reverse supplyingconditions via these RXDLOWHIGH normalLOWbus dominantbus recessivestandbyHIGH wake -up requestdetectedno wake -uprequest detected2003 Oct 145 Philips SemiconductorsProduct specificationHigh speed CAN transceiverTJA1040 LIMITING VALUESIn accordance with the Absolute Maximum Rating System (IEC 60134).

9 Notes1. Equivalent to discharging a 100 pF capacitor via a k series Equivalent to discharging a 200 pF capacitor via a H series inductor and a 10 series Junction temperature in accordance with IEC 60747-1. An alternative definition of Tvjis: Tvj=Tamb+P Rth(vj-amb),where Rth(vj-amb) is a fixed value to be used for the calculating of Tvj. The rating for Tvj limits the allowablecombinations of power dissipation (P) and ambient temperature (Tamb).THERMAL CHARACTERISTICSIn accordance with IEC SPECIFICATIONQ uality specification in accordance with AEC-Q100 . voltageno time limit +6 Voperating voltage on pin TXD + VVRXDDC voltage on pin RXD + VVSTBDC voltage on pins STB + VVCANHDC voltage on pin CANH0 < VCC< V; no time limit 27+40 VVCANLDC voltage on pin CANL0 < VCC< V; no time limit 27+40 VVSPLITDC voltage on pin SPLIT0 < VCC< V; no time limit 27+40 VVtrttransient voltages on pins CANH,CANL and SPLIT according to ISO 7637; see 200+200 VVesdelectrostatic discharge voltageHuman Body Model (HBM); note 1pins CANH and CANLand SPLIT 6+6kVall other pins 4+4kVMachine Model (MM).

10 Note 2 200+200 VTvjvirtual junction temperaturenote 3 40+150 CTstgstorage temperature 55+150 CSYMBOLPARAMETERCONDITIONSVALUEUNITRth(v j-a)thermal resistance from virtual junctionto ambient in SO8 packagein free air145K/WRth(vj-s)thermal resistance from virtual junctionto substrate of bare diein free air50K/W2003 Oct 146 Philips SemiconductorsProduct specificationHigh speed CAN transceiverTJA1040 CHARACTERISTICSVCC= to V, Tvj= 40 to +150 C and RL=60 unless specified otherwise; all voltages are defined withrespect to ground; positive currents flow into the IC; note (pin VCC)ICCsupply currentstandby mode51015 Anormal moderecessive; VTXD= ; VTXD=0V305070mATransmit data input (pin TXD)VIHHIGH-level input voltage2 VCC+ VVILLOW-level input voltage + input currentVTXD=VCC 50 +5 AIILLOW-level input currentnormal mode; VTXD=0V 100 200 300 ACiinput capacitancenot tested 510pFStandby mode control input (pin STB)VIHHIGH-level input voltage2 VCC+ VVILLOW-level input voltage + input currentVSTB=VCC 0 AIILLOW-level input currentVSTB=0V 1 4 10 AReceive data output (pin RXD)VOHHIGH-level output voltagestandby mode;IRXD= 100 AVCC VCC VCC VIOHHIGH-level output currentnormal mode.