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ATA6622 PDF预览

ATA6622

更新时间： 2024-02-12 07:10:14
品牌 Logo 应用领域
爱特美尔 - ATMEL 总线收发器稳压器
页数 文件大小 规格书
29页 882K
描述
LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog

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ATA6622 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：QFN包装说明：HVQCCN,
针数：20Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.64JESD-30 代码：S-XQCC-N20
长度：5 mm功能数量：1
端子数量：20最高工作温度：125 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：HVQCCN封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE认证状态：Not Qualified
座面最大高度：1 mm表面贴装：YES
电信集成电路类型：INTERFACE CIRCUIT温度等级：AUTOMOTIVE
端子形式：NO LEAD端子节距：0.65 mm
端子位置：QUAD宽度：5 mm
Base Number Matches：1

ATA6622 数据手册

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ATA6622/ATA6624/ATA6626  
3.7  
3.8  
Input/Output Pin (TXD)  
In Normal Mode the TXD pin is the microcontroller interface used to control the state of the LIN  
output. TXD must be pulled to ground in order to have a low LIN-bus. If TXD is high or uncon-  
nected (internal pull-up resistor), the LIN output transistor is turned off, and the bus is in  
recessive state. During Fail-safe Mode, this pin is used as output. It is current-limited to < 8 mA.  
and is latched to low if the last wake-up event was from pin WAKE or KL_15.  
TXD Dominant Time-out Function  
The TXD input has an internal pull-up resistor. An internal timer prevents the bus line from being  
driven permanently in dominant state. If TXD is forced to low for longer than tDOM > 6 ms, the  
LIN-bus driver is switched to recessive state.  
To reactivate the LIN bus driver, switch TXD to high (> 10 µs).  
The time-out function is disabled in the ATA6626. Switching to dominant level on the LIN bus  
occurs without any time limitations.  
3.9  
Output Pin (RXD)  
The Output pin reports the state of the LIN-bus to the microcontroller. LIN high (recessive state)  
is reported by a high level at RXD; LIN low (dominant state) is reported by a low level at RXD.  
The output has an internal pull-up resistor with typically 5 kΩto VCC. The AC characteristics can  
be defined with an external load capacitor of 20 pF.  
The output is short-circuit protected. RXD is switched off in Unpowered Mode (i.e., VS = 0V).  
3.10 Enable Input Pin (EN)  
The Enable Input pin controls the operation mode of the device. If EN is high, the circuit is in  
Normal Mode, with transmission paths from TXD to LIN and from LIN to RXD both active. The  
VCC voltage regulator operates with 3.3V/5V/50 mA output capability.  
If EN is switched to low while TXD is still high, the device is forced to Silent Mode. No data trans-  
mission is then possible, and the current consumption is reduced to IVS typ. 57 µA. The VCC  
regulator has its full functionality.  
If EN is switched to low while TXD is low, the device is forced to Sleep Mode. No data transmis-  
sion is possible, and the voltage regulator is switched off.  
3.11 Wake Input Pin (WAKE)  
The Wake Input pin is a high-voltage input used to wake up the device from Sleep Mode or  
Silent Mode. It is usually connected to an external switch in the application to generate a local  
wake-up. A pull-up current source, typically 10 µA, is implemented.  
If a local wake-up is not needed for the application, connect the Wake pin directly to the VS pin.  
3.12 Mode Input Pin (MODE)  
Connect the MODE pin directly or via an external resistor to GND for normal watchdog opera-  
tion. To debug the software of the connected microcontroller, connect MODE pin to 3.3V/5V and  
the watchdog is switched off.  
5
4986G–AUTO–09/09  
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