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| MC34901 高速CAN收發器工業應用解決方案 |
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| 文章來源： 更新時間：2015/3/9 17:36:00 |
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Freescale公司的MC33901是高速CAN收發器,提供MCU CAN協議控制器和物理雙線CAN總線間的物理接口,具有極好的EMC和ESD性能,不需要外接濾波器元件.支持工CAN高速應用,以及交通運輸,工廠自動化,工業過程控制,電梯/升降機等.本文介紹了MC34901主要特性,框圖,電源和雙電源應用電路,以及評估板KIT34901EFEVB主要特性, 電源和雙電源測試電路和評估板電路圖與材料清單.
The MC33901/34901 are high speed CAN transceivers providing the physical interface between the CAN protocol controller of an MCU and the physical dual wires CAN bus. They are packaged in an 8 pin SOIC with market standard pin out, and offer excellent EMC and ESD performance without the need for external filter components.
Four devices variations are available:
- Versions with and without CAN bus wake-up.
- Versions with and without TXD dominant protection.
MC34901主要特性:
•Very low current consumption in standby mode
•Automatic adaptation to 3.3 or 5.0 V MCU communication
•Standby mode with remote CAN wake-up on some versions.
•Pin and function compatible with market standard
Cost efficient robustness:
•High system level ESD performance
•Very high electromagnetic Immunity and low electromagnetic emission without common mode choke or other external components.
Fail-safe behaviors:
•TXD Dominant timeout, on the MC33901 version.
•Ideal passive when unpowered, CAN bus leakage current <10 A.
•VDD and VIO monitoring
MC34901應用:
Industrial Applications (MC34901)
•Transportation
•Backplanes
•Lift/elevators
•Factory automation
•Industrial process control
Automotive Applications (MC33901)
•Supports automotive CAN high-speed applications
•Body electronics
•Power train
•Chassis and safety
•Infotainment
•Diagnostic equipment
•AccessoriesEF
圖1. MC34901框圖
圖2. MC34901簡化應用電路圖
圖3. MC34901單電源應用電路圖
圖4. MC34901雙電源應用電路圖
MC34901評估板KIT34901EFEVB
This evaluation board allows the user to implement and test the functionalities of the MC34901, High Speed CAN transceiver.
The KIT34901EFEVB Evaluation Board is an easy-to-use circuit board that allows the user to exercise the function of the MC34901, High Speed CAN transceiver.
•Supply from a single 5.0 V, or dual 5.0 V and 3.3 V supplies
•Local switches for single or dual supply selection
•Switches for device operating mode selection
•Footprint for optional CAN bus filter and protection component
•8-pin Single In Line connector to access MC34901 device pins
•Two LEDs to display board and MC34901 state
圖5. MC34901評估板KIT34901EFEVB外形圖
圖6. 評估板KIT34901EFEVB單電源測試電路圖
圖7. 評估板KIT34901EFEVB雙電源測試電路圖
圖8. 評估板KIT34901EFEVB電路圖
評估板KIT34901EFEVB材料清單:
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