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| TH8082 Single LIN Bus Transceiver Features and Benefits Single wire LIN transceiver Compatible to LIN Protocol Specification, Rev. 1.1 Compatible to ISO9141 functions Control Output for voltage regulator Up to 20 kbps bus speed Low RFI due to slew rate control Fully integrated receiver filter Protection against load dump, jump start Bus terminals proof against short-circuits and transients in the automotive environment Very low (25 A) typical power consumption in sleep mode Thermal overload and short circuit protection High impendance Bus pin in case of loss of ground and undervoltage condition 4kV ESD protection on bus pin VCC TxD 3 4 Pin Diagram SOIC8NB RxD EN 1 2 8 7 INH VS BUS GND TH8082 6 5 Ordering Information Part No. TH8082 JDC Temperature Range -40C...125C Package SOIC8, 150mil General Description The TH8082 is a physical layer device for a single wire data link capable of operating in applications where high data rate is not required and a lower data rate can achieve cost reductions in both the physical media components and in the microprocessor which use the network. The TH8082 is designed in accordance to the physical layer definition of the LIN Protocol Specification , Rev. 1.2 . The IC furthermore can be used in ISO9141 systems. Because of the very low current consumption of the TH8082 in the recessive state it's particularly suitable for ECU applications with hard standby current requirements. An advanced sleep mode capability allows a shutdown of the whole application . The included wake-up function detects incoming dominant bus messages and enables the voltage regulator. Data Sheet Rev 1.0 June 2001 Page 1 www.melexis.com TH8082 Single LIN Transceiver Functional Diagram TH8082 INH VS internal Supply & References Biasing & Bandgap Thermal Protection VCC POR SLEW RATE TxD BUS Driver BUS GND EN MODE CONTROL RxD Wake-up Filter Receive Comparator Input Filter Figure 1 - Block Diagram Data Sheet Rev 1.0 June 2001 Page 2 www.melexis.com TH8082 Single LIN Transceiver Functional Description After power on the chip automatically enters the VBAT stanby mode . In this intermediate mode the INH output will become HIGH (VS) and therefore the voltage regulator will provide the VCC - supply . The transceiver will remain the VBAT-stanby mode until the controller sets it to normal operation ( EN = High ) . Only in this mode bus communication is possible. The TH8082 switches itself in the VBAT-stanby mode if VCC is missing or below the threshold. The sleep mode ( EN = LOW) can only be reached from normal mode and permits a very low power consumtion because the transceiver and even the external voltage regulator get disabled. If the VCC has been switched off a wake-up request from the bus line will cause the TH8082 to enter the VBAT-stanby mode (VCC is present again) and sets the RxD output to low until the device enters the normal operation mode (active LOW interrupt at RxD). If the INH pin is not connected to the regulator or the inhibitable external regulator is not the one that provides the VCC - supply, the normal mode is directly accessilble by a logic high on the EN pin. In order to prevent an unintended wake-up caused by disturbances of the automotiv environment incoming dominant signals from the bus have to exceed the wake- up delay time. Mode Control of TH8082 EN 0 0 1 1 0 0 VCC 0 1 1 0 0 1 Comment VBAT-standby , power on VBAT-standby , VCC on , wake up condition after power on Normal mode , VCC on VBAT-standby , VCC missing (VCC Page 3 www.melexis.com TH8082 Single LIN Transceiver Application Circuit Car Battery 1N4001 2.2uF LIN BUS VBAT Voltage regulator 100nF MASTER ECU VBAT +5V 100nF optional 10 100nF 100nF VCC RxD BUS VS 100p 33H ECU connector to Single Wire LIN Bus ECU connector to Single Wire LIN Bus P TH8080[1] TxD 82pF GND GND [1] TH8080 - low cost transceiver without INH control 1N4001 2.2uF VBAT Voltage regulator 100nF VBAT INH SLAVE ECU +5V 100nF 100nF 100nF optional 10 VCC INH VS 100p TH8082 P RxD TxD EN BUS 33H 82pF GND GND Figure 2 - Application Circuit Data Sheet Rev 1.0 June 2001 Page 4 www.melexis.com TH8082 Single LIN Transceiver Electrical Specification All voltages are referenced to ground (GND). Positive currents flow into the IC. The absolute maximum ratings given in the table below are limiting values that do not lead to a permanent damage of the device but exceeding any of these limits may do so. Long term exposure to limiting values may affect the reliability of the device. Reliable operation of the TH8082 is only specified within the limits shown in "Operating conditions". Operating Conditions Parameter Battery voltage Supply voltage Operating ambient temperature Junction temperature [1] Symbol VS VCC TA TJc Min 6 4.5 -40 Max 18 5.5 +125 +150 Unit V V C C Absolute Maximum Ratings Parameter Batterry Supply Voltage Supply Voltage Short-term supply voltage Transient supply voltage Transient supply voltage Transient supply voltage BUS voltage Transient bus voltage Transient bus voltage Transient bus voltage DC voltage on pins TxD, RxD ESD capability of pin BUS ESD capability of any other pins Maximum latch - up free current at any Pin Maximum power dissipation Thermal impedance Storage temperature Junction temperature Symbol Conditions VS VCC VS.ld VS.tr1 VS.tr2 VS.tr3 VBUS VBUS.tr1 VBUS.tr2 VBUS.tr3 VDC ESDBUSHB Human body model, equivalent ESDHB ILATCH Ptot JA Tstg Tvj At Tamb = +125 C in free air -55 -40 Human body model, equivalent Load dump; t<500ms ISO 7637/1 pulse 1[1] ISO 7637/1 pulses 2[1] ISO 7637/1 pulses 3A, 3B t < 500 ms, VS = 20 V VS = 20 V ISO 7637/1 pulse 1 [2] ISO 7637/1 pulses 2 [2] ISO 7637/1 pulses 3A, 3B [2] -150 -0.3 -4 -2 -500 -150 -20 -40 -150 +100 +150 +7 +4 +2 +500 197 152 +150 +150 -150 +100 +150 +40 t < 1 min Min. -0.3 -0.3 Max. +30 +7 +40 Unit V V V V V V V V V V V kV kV mA mW K/W C C ______________________________ Data Sheet Rev 1.0 June 2001 Page 5 www.melexis.com TH8082 Single LIN Transceiver Static Characteristics (VS = 6 to 18V, VCC= 4.5 to 5.5V, TA = -40 to +125C, unless otherwise specified) All voltages are referenced to ground (GND), positive currents are flow into the IC. Parameter PIN VS,VCC Supply current, dominant Supply current, dominant Supply current, recessive Supply current, recessive VCC undervoltage lockout Supply current, sleep mode PIN BUS / TRANSMITTER Bus output voltage, dominant Bus output voltage, recessive Bus short circuit current Bus input current, recessive Bus reverse polarity curr., rec. Bus pull up resistor PIN BUS / RECEIVER Bus input threshold, recessive to dominant Bus input threshold, dominant to recessive Bus input hysteresis PIN TXD, EN High level input voltage Low level input voltage TxD pull up current, high level TxD pull up current, low level EN pull down current, high level EN pull down current, low level Vih Vil IIH_TXD IIL_TXD IIH_EN IIL_EN Rising edge Falling edge VTxD = 4V VTxD = 1V VEN = 4V, VCC = 0V VEN = 1V, VCC = 0V 0.3* VCC -125 -500 50 12 -50 -250 125 25 -25 -100 250 50 0.7* VCC V V A A A A VihBUS_rd VihBUS_rd VBUS_hys TxD open , -8V Data Sheet Rev 1.0 June 2001 Page 6 www.melexis.com TH8082 Single LIN Transceiver Static Characteristics (continued) Parameter PIN RXD Low level output voltage High level output voltage PIN INH High level output voltage Leakage current Thermal protection Thermal shutdown Hysteresis Tsd Thys 150 5 180 25 C C Voh_INH VINH_lk IRxD = -180A EN = L, VINH = 0V VS -0.8V VS -0.5V -5 5 V A Vol_rxd Voh_rxd IRxD = 1.25mA IRxD = -250A VCC -0.9 0.9 V V Symbol Conditions Min Typ Max Unit Dynamic Characteristics All dynamic values of the table below refer to the test-schematic schown in Figure - Timing Diagram 6V VS 18V, -40C TA 125C, unless otherwise specified Parameter Slew rate falling edge Symbol tSRF tSRR ttrans_pdf ttrans_pdr ttrans_sym trec_pdf trec_pdr trec_sym trec_deb twu ten_deb Conditions 80% < VBUS < 20% , minimum & maximum bus load 20% < VBUS < 80% , minimum bus load [1] TxD high to low transition[2] TxD low to high transition[2] Calculate ttrans_pdf - ttrans_pdr BUS recessive to dominant [2] BUS dominant to recessive[2] Calculate ttrans_pdf - ttrans_pdr BUS rising & falling edge[3] BUS rising & falling edge[4] Normal to sleep mode] -2 1.2 25 10 20 -2 Min -3 Typ -2 Max -1 Unit V/s Slew rate rising edge Propagation delay transmitter ( TxD->BUS) Propagation delay transmitter ( TxD->BUS) Propagation delay transmitter symmetry Propagation delay receiver ( BUS->RxD) Propagation delay receiver ( BUS->RxD) Propagation delay receiver symmetry Receiver debounce time Wake-up filter time EN debauncing time 1 2 3 4 4 2 6 6 2 3.1 90 40 V/s s s s s s s s s s ______________________________ [1] [2] [3] [4] Minimum slew rate of the rising edge is determined by the network time constant See timing diagram figure 3 See timing diagram figure 4 See timing diagram figure 5 Data Sheet Rev 1.0 June 2001 Page 7 www.melexis.com TH8082 Single LIN Transceiver Timing Diagrams VTxD 50% t tTrans_pdf tTrans_pdr VBUS 60% 40% t tRec_pdf tRec_pdr VRxD 50% t Figure 3 - Input/Output Timing t < trec_deb t < trec_deb VBUS 60% 40% t VRxD 50% t Figure 4 - Receiver Debouncing Filter Data Sheet Rev 1.0 June 2001 Page 8 www.melexis.com TH8082 Single LIN Transceiver Timing Diagrams (continued) VBU S t t> twu VINH twu t VCC t VEN t VRx D wake-up interrupt t Figure 5 - Sleep mode and wake up procedure Data Sheet Rev 1.0 June 2001 Page 9 www.melexis.com TH8082 Single LIN Transceiver Test Circuit for Dynamic Characteristics 100n 900 VS VCC 100n BUS TxD TH8082 Cload[1] GND INH RxD 20p [1] [2] Cmin = 500pF / Cmax =10nF Rmin = 500 / Rmax =900 Figure 5 - Test Circuit for Dynamic Characteristics 100n 900 VS VCC 100n BUS 1nF GND TxD RxD Oszi TH8082 Schaffnergenerator Pulse 3a,3b 12V Pulse 1,2,4 Figure 6 - Test Circuit for Automotive Transients Data Sheet Rev 1.0 June 2001 Page 10 www.melexis.com TH8082 Single LIN Transceiver Pin Description RxD EN VCC TxD 1 2 8 7 INH VS BUS GND TH8082 3 4 6 5 Pin 1 2 3 4 5 6 7 8 RXD EN VCC TXD GND BUS VS INH Name I/O O I Function Receive data from BUS to core, LOW in dominant state Enables the normal operation mode when HIGH 5V supply input I Transmit data from core to BUS, LOW in dominant state Ground I/O Single wire bus pin, LOW in dominant state Battery input voltage O Control output for voltage regulator Data Sheet Rev 1.0 June 2001 Page 11 www.melexis.com TH8082 Single LIN Transceiver Mechanical Specifications SOIC8 Package Dimensions Small Outline Integrated Circiut (SOIC), All Dimension in mm, coplanarity < 0.1 mm SOIC 8, 150 mil D min max 4.8 5.0 E 3.80 4.00 H 10.00 10.65 A 5.80 6.20 A1 0.10 0.25 e 1.27 b 0.33 0.51 L 0.40 1.27 0 8 All Dimension in inch, coplanarity < 0.004" min max 0.189 0.197 0.150 0.157 0.228 0.244 0.053 0.069 0.004 0.010 0.050 0.013 0.020 0.016 0.050 0 8 Data Sheet Rev 1.0 June 2001 Page 12 www.melexis.com TH8082 Single LIN Transceiver Notes Data Sheet Rev 1.0 June 2001 Page 13 www.melexis.com TH8082 Single LIN Transceiver For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis direct: Europe Phone: E-mail: +32 13 67 04 95 sales_europe@melexis.com All other locations Phone: E-mail: +1 603 223 2362 sales_usa@melexis.com Important Notice Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis' rendering of technical or other services. (c) 2000 Melexis GmbH. All rights reserved. Data Sheet Rev 1.0 June 2001 Page 14 www.melexis.com |
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