MCZ33897在单线媒中应用方案

Frescale公司的MCZ33897系列是在单线媒体中采用载波监听多路访问/冲突检测(CSMA/CR)数据链接进行数字通信的物理层. MCZ33897系列直接从表面上看12V的电源系统中供电,可以工作在低速率(33.33kbps)或高速(83.33kbps)数据速率.器件的高压叫醒功能可以控制用于MCU和其它逻辑功能的稳压器.本文介绍了MCZ33897系列的主要特性以及各种应用电路图.
Single Wire CAN Transceiver
The 33897 Series provides a physical layer for digital communications purposes using a Carrier Sense Multiple Access/Collision Resolution (CSMA/CR) data link operating over a single wire medium. This is more commonly referred to as Single Wire Controller Area Network (CAN).
The 33897 Series operates directly from a vehicles 12 V battery system or a broad range of DC-power sources. It can operate at either low or high (33.33 kbps or 83.33 kbps) data rates. A high-voltage wake-up feature allows the device to control the regulator used in support of the MCU and other logic. The device includes a control terminal that can be used to put the module regulator into Sleep mode. The presence of a defined wake-up voltage level on the bus will reactivate the control line to turn the regulator and the system back on.

The device complies with the GMW3089v2.4 General Motors Corporation specification.

主要特性:

Waveshaping for Low Electromagnetic Interference (EMI)
Detects and Automatically Handles Loss of Ground
Worst-Case Sleep Mode Current of Only 60 μA (75 μA on the 33897T)
Current Limit Prevents Damage Due to Bus Shorts
Built-In Thermal Shutdown on Bus Output
Protected Against Vehicular Electrical Transients
Undervoltage Lockout Prevents False Data with Low Battery
Pb-Free Packaging Designated by Suffix Code EF

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