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参数资料
| 型号： | MCZ33889DEGR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 28/59页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM BASIS W/CAN 28-SOIC |
| 标准包装： | 1,000 |
| 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： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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Analog Integrated Circuit Device Data
34
Freescale Semiconductor
33889
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
The following figure illustrates the CAN signal during normal communication and in the example of a CANH open wire. The
single ended receiver is sampled at the differential receiver switching event, in a window of 1.0
s.
Figure 14. CAN Normal Signal Communication and CAN Open Wire
Figure 15. Open Wire Detection Principle
Open wire detection, MC33889B and D:
Failure detection:
The device will detect a difference in toggling counts between the differential receiver and one of the single ended receivers.
Every time a difference in count is detected a counter is incremented. When the counter reaches 4, the device detects and reports
an open wire condition. The open wire detection is performed only when the device receives a message and not when it send
message.
Open wire recovery:
When the open wire failure has recovered, the difference in count is reduced and the device detects the open wire recovery.
CANH
CANL
Diff
S-L
S-H
-3.2V
Rec
Dom
Rec
Sampling point
CANH
CANL
Diff
S-L
S-H
-3.2V
Rec
Dom
Rec
Sampling point
Sampling recessive level
= > open wire “detection pulse”
1us
(No open wire, or open wire recovery)
(CAN H open wire)
Sampling dominant level
= > no failure or “recovery pulse”
Diff
CANH
CANL
S-H
1us
Sampling
Dom Rec
S-L
1us
Sampling
CANH counter
L-open
L-counter +/-
(count = 4)
recover
(count = 0)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ33897AEF | 功能描述:网络控制器与处理器 IC SWCAN 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 |
| MCZ33897AEF/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Single Wire CAN Transceiver |
| MCZ33897AEFR2 | 功能描述:网络控制器与处理器 IC SWCAN 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 |
| MCZ33897BEF | 功能描述:网络控制器与处理器 IC SINGLE WIRE CAN 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 |
| MCZ33897BEF/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Single Wire CAN Transceiver |
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