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标题:请问使用3.3V供电的RS232转换芯片都有什么？谢谢，我查到一个是MAX3243，但是是多通道，我用一个就行啦[+10]
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编号:4413 大虾论坛文章编号:494123 发表时间:2004-11-1 14:07:33 访问次数:11837 文章类型:硬件,电路,PCB
作者:yigexiaoyu/id:38835
跟帖作者:leiyong,yigexiaoyu,不解一惑,缥缈,trinove,hanzhaowei,
本页地址:http://www.daxia.com/bibis/lookgood.asp?lookid=4413

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请问使用3.3V供电的RS232转换芯片都有什么？谢谢，我查到一个是MAX3243，但是是多通道，我用一个就行啦(0字)yigexiaoyu2004-11-1 14:07:33[23次]



相关帖子>>>：

• 你已经找到答案了。(0字)leiyong[11次]2004-11-1 14:19:04
  
• 不是把，芯海茫茫，就一个MAX3243能用？(0字)yigexiaoyu[10次]2004-11-1 14:21:53
  
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• 谢谢，正在看他的DATASHEET(0字)yigexiaoyu[9次]2004-11-1 16:00:26
  
• MAX232是5V供电的牙(0字)yigexiaoyu[10次]2004-11-1 15:55:39
  
• SP385，(0字)缥缈[9次]2004-11-1 14:39:00
  
• MAX3222/MAX3232双通道(3524字)trinove[14次]2004-11-1 17:54:52
  The MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-
  dropout transmitter output stage enabling true RS-232 performance from a 3.0V
  to 5.5V supply with a dual charge pump. The devices require only four small
  0.1µF external charge-pump capacitors. The MAX3222, MAX3232, and MAX3241 are
  guaranteed to run at data rates of 120kbps while maintaining RS-232 output
  levels. The MAX3237 is guaranteed to run at data rates of 250kbps in the
  normal operating mode and 1Mbps in the MegaBaud™ operating mode, while
  maintaining RS-232 output levels.
  The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 features a 1µA
  shutdown mode that reduces power consumption and extends battery life in
  portable systems. Its receivers remain active in shutdown mode, allowing
  external devices such as modems to be monitored using only 1µA supply current.
  The MAX3222 and MAX3232 are pin, package, and functionally compatible with the
  industry-standard MAX242 and MAX232, respectively.
  
  The MAX3241 is a complete serial port (3 drivers/ 5 receivers) designed for
  notebook and subnotebook computers. The MAX3237 (5 drivers/3 receivers) is
  ideal for fast modem applications. Both these devices feature a shutdown mode
  in which all receivers can remain active while using only 1µA supply current.
  Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra outputs in addition
  to their standard outputs. These extra outputs are always active, allowing
  external devices such as a modem to be monitored without forward biasing the
  protection diodes in circuitry that may have VCC completely removed.
  
  The MAX3222, MAX3237, and MAX3241 are available in space-saving TSSOP and SSOP
  packages.
  
• MAX232配1U的电容就行。0.1u的有可能不行。(0字)hanzhaowei[11次]2004-11-1 17:55:54