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Automotive Power

Data Sheet

Rev. 1.0, 2012-03-01

TLE7250G

High Speed CAN Transceiver

Summary of content (22 pages)

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TLE7250G High Speed CAN Transceiver Data Sheet Rev. 1.
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TLE7250G Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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High Speed CAN Transceiver 1 TLE7250G Overview Features • • • • • • • • • • • • Fully compliant with ISO 11898-2 Wide common mode range for electromagnetic immunity (EMI) Very low electromagnetic emission (EME) Excellent ESD immunity CAN short-circuit proof to ground, battery and VCC TxD time-out function Low CAN bus leakage current in power-down state Overtemperature protection Protected against automotive transients CAN data transmission rate up to 1 Mbps Green Product (RoHS-compliant) AEC Qualified
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TLE7250G Block Diagram 2 Block Diagram 3 Transmitter 7 CANL 1 Driver CANH 6 Output Stage VCC TxD TempProtection Timeout Mode Control 8 5 NEN NRM Receiver VCC/2 = Comparator * GND Figure 1 2 4 RxD Block diagram Note: In comparison with theTLE6250G, the pin 8 (INH) was renamed as NEN, but the function remains unchanged. NEN stands for NotENable. The name of pin 5 has been changed from RM (TLE6250G) to NRM on the TLE7250G. The function of pin 5 remains unchanged. Data Sheet 4 Rev.
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TLE7250G Pin Configuration 3 Pin Configuration 3.1 Pin Assignment TxD 1 8 NEN GND 2 7 CANH VCC 3 6 CANL RxD 4 5 NRM Figure 2 Pin configuration 3.2 Pin Definitions and Functions Table 1 Pin Definition and Functions Pin Symbol Function 1 TxD Transmit Data Input; internal pull-up to VCC, “low” for “dominant” state. 2 GND Ground 3 VCC Transceiver Supply Voltage; 100 nF decoupling capacitor to GND required. 4 RxD Receive Data Output; “low” in “dominant” state.
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TLE7250G Functional Description 4 Functional Description CAN is a serial bus system that connects microcontrollers, sensors and actuators for real-time control applications. The use of the Control Area Network (abbreviated CAN) within road vehicles is described by the international standard ISO 11898. According to the 7-layer OSI reference model, the physical layer of a CAN bus system specifies the data transmission from one CAN node to all other available CAN nodes within the network.
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TLE7250G Functional Description The TLE7250G is a High Speed CAN transceiver, operating as an interface between the CAN controller and the physical bus medium. An HS CAN network is a two-wire, differential network, which allows data transmission rates up to 1 Mbps. The characteristics of an HS CAN network are the two signal states on the CAN bus: “dominant” and “recessive” (see Figure 3). The CANH and CANL pins are the interface to the CAN bus and both pins operate as an input and output.
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TLE7250G Functional Description 4.2 Modes of Operation Three different modes of operation are available on the TLE7250G. Each mode has specific characteristics in terms of quiescent current or data transmission. NEN and NRM are used as the digital input pins for mode selection. Figure 4 illustrates the different mode changes depending on the status of the NEN and NRM pins. After supplying VCC to the HS CAN transceiver, the TLE7250G starts in stand-by mode.
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TLE7250G Functional Description 4.3 Normal-operating Mode In the normal-operating mode, the HS CAN transceiver TLE7250G sends the serial data stream on the TxD pin to the CAN bus. The data on the CAN bus is displayed at the RxD pin simultaneously. In the normal-operating mode, all functions of the TLE7250G are active: • • • • The transmitter is active and drives data from the TxD to the CAN bus. The receiver is active and provides the data from the CAN bus to the RxD pin.
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TLE7250G Fail-safe Functions 5 Fail-safe Functions 5.1 Short-circuit Protection The CANH and CANL bus outputs are short-circuit proof, either against GND or a positive supply voltage. A current limiting circuit protects the transceiver against damage. If the device heats up due to a continuous short on the CANH or CANL, the internal overtemperature protection switches off the transmitter. 5.2 Unconnected Logic Pins All logic input pins have an internal pull-up resistor to VCC.
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TLE7250G Fail-safe Functions supply voltage VCC hysteresis VCC(UV,H) power-down reset level VCC(UV) delay time undervoltage recovery tDelay(UV) NEN = 0 NRM = 1 normal-operating mode stand-by mode normal-operating mode1) 1) Assuming the logical signals on the pin NEN and on the pin NRM keep its values during the undervoltage event. In this case NEN remains “low“ and NRM remains “high“. Figure 6 Undervoltage detection on VCC 5.
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TLE7250G General Product Characteristics 6 General Product Characteristics 6.1 Absolute Maximum Ratings Table 3 Absolute Maximum Ratings of Voltage, Current and Temperatures1) All voltages with respect to ground; positive current flowing into the pin; (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Max. Unit Remarks Voltage 6.1.1 Supply voltage VCC -0.3 6.0 V – 6.1.2 CANH DC voltage against GND VCANH -40 40 V – 6.1.
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TLE7250G General Product Characteristics 6.2 Functional Range Table 4 Operating Range Pos. Parameter Symbol Limit Values Unit Conditions Min. Max. VCC 4.75 5.25 V – TJ -40 150 °C 1) Supply Voltage 6.2.1 Transceiver supply voltage Thermal Parameter 6.2.2 Junction temperature 1) Not subject to production test, specified by design Note: Within the functional range the IC operates as described in the circuit description.
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TLE7250G Electrical Characteristics 7 Electrical Characteristics 7.1 Functional Device Characteristics Table 6 Electrical Characteristics 4.75 V < VCC < 5.25 V; RL = 60 Ω; -40 °C < Tj < +150 °C; all voltages with respect to ground; positive current flowing into the pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. Current Consumption 7.1.1 Current consumption ICC – 2 6 mA “recessive” state; VTxD = VCC 7.1.
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TLE7250G Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 4.75 V < VCC < 5.25 V; RL = 60 Ω; -40 °C < Tj < +150 °C; all voltages with respect to ground; positive current flowing into the pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 0.5 × 0.7 × VCC VCC Receive-only Input NRM 7.1.19 “High” level input voltage threshold VNRM,H – 7.1.20 “Low” level input voltage threshold VNRM,L 0.3 × 0.4 × VCC VCC 7.1.
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TLE7250G Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 4.75 V < VCC < 5.25 V; RL = 60 Ω; -40 °C < Tj < +150 °C; all voltages with respect to ground; positive current flowing into the pin; unless otherwise specified. Pos. Parameter 7.1.41 CANH short-circuit current Symbol ICANHsc Limit Values Unit Remarks Min. Typ. Max.
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TLE7250G Electrical Characteristics 7.2 Diagrams NRM 7 TxD CANH NEN CL 5 1 8 RL RxD 6 4 CRxD CANL GND VCC 3 100 nF 2 Figure 8 Simplified test circuit VTxD VCC GND VDIFF td(L),T 0.9V 0.5V td(L),R VRxD t td(H),T t td(H),R td(L),TR td(H),TR VCC 0.7 x VCC 0.3 x VCC GND t Figure 9 Data Sheet Timing diagram for dynamic characteristics 17 Rev. 1.
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TLE7250G Application Information 8 Application Information 8.1 ESD Immunity According to IEC61000-4-2 Tests for ESD immunity according to IEC61000-4-2, “Gun test” (150 pF, 330 Ω), have been performed. The results and test conditions are available in a separate test report.
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TLE7250G Application Information 8.2 Application Example VBAT I Q 22 uF TLE42744DV50 CANH CANL 100 nF GND 10 uF 3 VCC 100 nF TLE7250G NEN 7 CANH 6 TxD RxD CANL Optional: Common Mode Choke NRM 8 VCC Out 1 Out 4 In 5 Microcontroller e.g.
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TLE7250G Package Outlines 9 Package Outlines 0.1 2) 0.41+0.1 -0.06 0.2 8 5 1 4 5 -0.2 1) M B 0.19 +0.06 C 8 MAX. 1.27 4 -0.21) 1.75 MAX. 0.175 ±0.07 (1.45) 0.35 x 45˚ 0.64 ±0.25 6 ±0.2 A B 8x 0.2 M C 8x A Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max.
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TLE7250G Revision History 10 Revision History Revision Date Changes 1.0 2012-03-01 Data Sheet TLE7250G Rev. 1.0 Data Sheet 21 Rev. 1.
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Edition 2012-03-01 Published by Infineon Technologies AG 81726 Munich, Germany © 2006 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics.