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参数资料
| 型号： | MCZ33989EG |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 52/72页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM BASIS CHIP CAN 28-SOIC |
| 标准包装： | 26 |
| 系列： | * |
| 应用： | * |
| 接口： | * |
| 电源电压： | * |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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Analog Integrated Circuit Device Data
56
Freescale Semiconductor
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
CAN Driver Overtemperature:
In case of an overtemperature condition at the CANH or CANL driver, the driver will be automatically disabled and the THERM
bit set in the CAN register. If enabled, an interrupt will be signalled. The GFAIL flag is set in the MCR register.
When the CAN is in an overtemperature situation, the device is no longer able to transmit. As soon as the temperature is below
the overtemperature level minus hysteresis, the CAN driver is automatically re-enabled.
The THERM bit is latched and two conditions are necessary to clear it:
No longer “CAN overtemperature situation” AND
Read operation of the CAN register.
Overcurrent Detection:
The CAN interface can detect and signal overcurrent condition, occurring for instance in case of CANL shorted to VBAT. This
is signalled by the bit CUR in the CAN register. An INT can be enabled, and GFAIL bit is set. The CUR bit is latched and two
conditions are necessary to clear it:
No longer “CAN overcurrent situation” AND
Read operation of the CAN register.
Protection
The MC33989 CAN output is protected for automotive environments.
The CAN driver is protected against overtemperature and overcurrent.
ISO7637 Transient
The CANH and CANL are rated from +40 Vdc to -27 Vdc. This means that the MC33989 CAN output can handle failure
situations like the bus directly shorted to the battery line in a load dump situation (+40 V).
Ground disconnection of the module will lead to the CANH and CANL line floating high to the VBAT supply. The rest of the
network will not be affected. However the CANH and CANL lines of the ungrounded module will see a negative voltage of the
VBAT value, with respect to their gnd level. Such situations can be handled by the CAN interface of the MC33989, but also in
cases of a jump start (battery at 27 V) and gnd disconnection.
Fast transient pulses, ISO7637-3. During these pulses, the maximum rating of the CANH and CANL lines of +40 Vdc and -27
Vdc must be respected.
ESD
The CANH and CANL line of the MC33989 are rated at ±4.0 kV. An external capacitor between CANH and CANL to gnd or a
zener diode suppressor can be added to ensure a higher module resistance to ESD.
Current in Case of Bus Short Conditions
In case of short-circuit condition on the CAN bus the current in the CAN supply, the CAN line can be different from the nominal
Figure 44. Current in Case of Bus Short Conditions
V2 Terminal
60 ohms
CANH line
CAN L line
I_H
I_L
I_TERM
CANH
CANL
5V
VBAT
5V
VBAT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ33989EG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33989EGR2 | 功能描述:网络控制器与处理器 IC SBC-HS RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCZ33990EF | 功能描述:网络控制器与处理器 IC CLASS B SERIAL TRANS. RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCZ33990EF | 制造商:Freescale Semiconductor 功能描述:TRANCEIVER J-1850 CLASS B 8SOIC |
| MCZ33990EF/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Enhanced Class B Serial Transceiver |
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