参数资料
| 型号： | MC33889BDW |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 26/59页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM BASE W/CAN 28-SOIC |
| 标准包装： | 1 |
| 控制器类型： | 系统基础芯片 |
| 接口： | CAN |
| 电源电压： | 5.5 V ~ 18 V |
| 电流 - 电源： | 45mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页
Analog Integrated Circuit Device Data
32
Freescale Semiconductor
33889
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
General description
CAN driver:
The CANH driver is a “high side” switch to the V2 voltage (5.0 V). The CANL driver is a “low side” switch to gnd.The turn on
and turn off time is controlled in order to control the slew rate, and the CANH and CANL driver have a current limitation as well
as an over temperature shutdown.
The CAN H or CANL driver can be disabled in case a failure is detected on the CAN bus (ex: CANH driver is disabled in case
CANH is shorted to VDD). The disabling of one of the drivers is controlled by the CAN logic and the communication continues via
the other drivers. When the failure is removed the logic detects a failure recovery and automatically reenables the associated
driver.
The CAN drivers are also disabled in case of a Tx failure detection.
Bus termination:
The bus is terminated by pull-up and pull-down resistors, which are connected to GND, VDD, or VBAT through dedicated RTL
and RTH pins and internal switches Srh, Srl, Stvbat. Each node must have a resistor connected between CANH and RTH and
between CANL and RTL. The resistor value should be between 500 and 16000 ohm.
Transmitter Function
CAN bus levels are called Dominant and Recessive, and correspond respectively to Low and High states of the TX input pin.
Dominant state:
The CANH and CANL drivers are on. The voltage at CANL is <1.4 V, the voltage at CANH is >3.6 V, and the differential voltage
between CANH and CANL line is >2.2 V (3.6 -1.4 V).
Recessive state:
This is a weak state, where the CANH and CANL drivers are off. The CANL line is pulled up to 5 V via the RTL pin and RTL
resistor, and the CANH line is pull down via the RTH and RTH resistor. The resultant voltage at CANL is 5.0 V and 0V at CANH.
The differential voltage is -5.0 V (0V - 5.0 V). The recessive state can be over written by any other node forcing a Dominant state.
Receiver Function
In normal operation (no bus failures), RX is the image of the differential bus voltage. The differential receiver inputs are
connected to CANH and CANL.
The device incorporates single ended comparators connected to CANH and CANL in order to monitor the bus state as well as
detect bus failures. Failures are reported via the SPI.
In normal operation when no failure is present, the differential comparator is active. Under a fault condition, one of the two
CANH or CANL pins can be become non-operational. The single ended comparator of either CANH or CANL is activated and
continues to report a bus state to Rx pin. The device permanently monitors the bus failure and recovery, and as soon as fault
disappears, it automatically switches back to differential operation.
CAN interface operation Mode
The CAN has 3 operation modes: TxRx (Transmit-Receive), Receive Only, and Term-VBAT (Terminated to VBAT). The mode
is selected by the SPI. As soon as the MC33889 mode is sleep or stop (selected via MCR register), the CAN interface
automatically enters Tem-Vbat mode.
Tx Rx mode:
In this mode, the CAN drivers and receivers are enabled, and the device is able to send and receive messages. Bus failures
are detected and managed, this means that in case of a bus failure, one of the CAN drivers can be disabled, but communication
continues via the remaining drivers.
Receive Only mode:
In this mode, the transmitter path is disabled, so the device does not drive the bus. It maintains CANL and CANH in the
recessive state. The receiver function operates normally.
相关PDF资料 |
PDF描述 |
|---|---|
| MC33889DPEG | IC SYSTEM BASE W/CAN 28SOIC |
| MC33972TEWR2 | IC SWITCH DETECT SPI 32-SOIC |
| MC33975TEKR2 | IC SWITCH DETECT MULT 32-SOIC |
| MC33989DWR2 | IC SYSTEM BASE W/CAN 28-SOIC |
| MC3488ADR2G | IC LINE DRIVER DUAL EIA 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33889BDWR2 | 功能描述:网络控制器与处理器 IC SBC LIGHT PASS 3.3 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 |
| MC33889BPEG | 制造商:Freescale Semiconductor 功能描述:SYSTEM BASIS CHIP WITH LOW SPEED FAULT TOLERANT CAN INTERFACE 制造商:Freescale Semiconductor 功能描述:SBC-LITE-LS-CAN - Bulk 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN 28SOIC |
| MC33889BPEGR2 | 制造商:Freescale Semiconductor 功能描述:CAN 125Kbps Sleep/Stop 9V/12V/15V T/R 制造商:Freescale Semiconductor 功能描述:SBC-LITE-LS-CAN - Tape and Reel 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN 28SOIC |
| MC33889DDW | 功能描述:网络控制器与处理器 IC SBC LIGHT REV D 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 |
| MC33889DDWR2 | 功能描述:网络控制器与处理器 IC SBC LIGHT REV D 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 |
发布紧急采购，3分钟左右您将得到回复。