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SN65HVD234DRG4  收发器 IC CAN TRANSCEIVER 3.3V 8SOIC
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Logic chip
Product Details
Part no.SN65HVD234DRG4
Packge/Case8-SOIC
ManutacturerTexas Instruments
Description收发器 IC CAN TRANSCEIVER 3.3V 8-SOIC
 DatasheetCheck Datasheet

Texas Instruments SN65HVD234DR

The SN65HVD233, SN65HVD234, and SN65HVD235 are used in applications employing the controller area network (CAN) serial communication physical layer in accordance with the ISO 11898 standard. As a CAN transceiver, each provides transmit and receive capability between the differential CAN bus and a CAN controller, with signaling rates up to 1 Mbps.

Designed for operation in especially harsh environments, the devices feature cross-wire protection, overvoltage protection up to ±36 V, loss of ground protection, overtemperature (thermal shutdown) protection, and common-mode transient protection of ±100 V. These devices operate over a wide –7 V to 12 V common-mode range. These transceivers are the interface between the host CAN controller on the microprocessor and the differential CAN bus used in industrial, building automation, transportation, and automotive applications.

Modes: The RS pin (pin 8) of the SN65HVD233, SN65HVD234, and SN65HVD235 provides three modes of operation: high-speed, slope control, and low-power standby mode. The high-speed mode of operation is selected by connecting pin 8 directly to ground, allowing the driver output transistors to switch on and off as fast as possible with no limitation on the rise and fall slope. The rise and fall slope can be adjusted by connecting a resistor between the RS pin and ground. The slope will be proportional to the pin’s output current. With a resistor value of 10 kΩ the device driver will have a slew rate of ∼15 V/µs and with a value of 100 kΩ the device will have ∼2.0 V/µs slew rate. For more information about slope control, refer to Feature Description.

The SN65HVD233, SN65HVD234, and SN65HVD235 enter a low-current standby (listen only) mode during which the driver is switched off and the receiver remains active if a high logic level is applied to the RS pin. If the local protocol controller needs to transmit a message to the bus it will have to return the device to either high-speed mode or slope control mode via the RS pin.

Loopback (SN65HVD233): A logic high on the loopback (LBK) pin (pin 5) of the SN65HVD233 places the bus output and bus input in a high-impedance state. Internally, the D to R path of the device remains active and available for driver to receiver loopback that can be used for self-diagnostic node functions without disturbing the bus. For more information on the loopback mode, refer toFeature Description.

Ultra Low-Current Sleep (SN65HVD234): The SN65HVD234 enters an ultra low-current sleep mode in which both the driver and receiver circuits are deactivated if a low logic level is applied to EN pin (pin 5). The device remains in this sleep mode until the circuit is reactivated by applying a high logic level to pin 5.

Autobaud Loopback (SN65HVD235): The AB pin (pin 5) of the SN65HVD235 implements a bus listen-only loopback feature which allows the local node controller to synchronize its baud rate with that of the CAN bus. In autobaud mode, the bus output of the driver is placed in a high-impedance state while the bus input of the receiver remains active. There is an internal D pin to R pin loopback to assist the controller in baud rate detection, or the autobaud function. For more information on the autobaud mode, refer to Feature Description.

德克萨斯仪器sn65hvd234dr
的sn65hvd233,sn65hvd234,和sn65hvd235是采用控制器局域网(CAN)应用串行通信的物理层按照ISO 11898标准。作为CAN收发器,每个都提供差分CAN总线和CAN控制器之间的发送和接收能力,其信令速率高达1 Mbps。
设计为运行在特别恶劣的环境中,设备的功能交叉线保护、过电压保护起来±36伏,接地保护的损失,超温(热关机)保护,和共模瞬态保护±100诉这些器件可工作在很宽的–7 V至12 V共模范围。这些收发器是微处理器上的CAN can控制器和工业、楼宇自动化、运输和汽车应用中的差分CAN总线之间的接口。
模式:RS引脚(引脚8)的sn65hvd233,sn65hvd234,和sn65hvd235提供了三种操作模式:高速、斜率控制,低功耗待机模式。高速操作模式是通过直接将引脚8连接到地上,使驱动输出晶体管尽可能快地开关,不受升降斜率的限制。升降斜面可以通过连接RS引脚和地面之间的电阻来调节。斜率将与针的输出电流成比例。一个电阻值为10 KΩ设备驱动程序将有一个转换率∼15 V /µS和K值为100Ω设备将有∼2 V /µ的转换率。有关斜率控制的更多信息,请参阅特性描述。
的sn65hvd233,sn65hvd234,和sn65hvd235进入低电流待机(只听)模式中,司机关掉,如果一个高层次的逻辑应用到RS引脚接收机保持活跃。如果本地协议控制器需要向总线发送消息,则必须通过RS引脚将设备返回到高速模式或斜率控制模式。
环回(sn65hvd233):在环高逻辑(LBK)引脚(引脚5)的sn65hvd233地方总线输出在高阻抗状态总线输入。在内部,设备的d到R路径仍然是活动的,可用于驱动程序到接收器回送,可用于自诊断节点功能而不干扰总线。有关回环模式的更多信息,请参阅特性说明。
超低电流休眠(sn65hvd234):该sn65hvd234进入超低电流睡眠模式中的驱动器和接收器电路停用,如果低层次的逻辑应用到EN引脚(引脚5)。该设备保持在这种休眠模式,直到电路被激活,通过将高逻辑电平应用到引脚5。
Autobaud Loopback(sn65hvd235):AB引脚(引脚5)的sn65hvd235实现总线只听回送功能使得本地节点控制器同步波特率,CAN总线。在自适应模式下,驱动器的总线输出置于高阻抗状态而接收总线输入保持活跃。有一个内部D引脚R销环回协助波特率检测控制器,或自适应功能。在自适应模式的更多信息,参考特征描述。
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