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阅读：2208回复：2
3v供电的片子TTL电平如何定义
低电平和高电平各是如何定义
和5v供电数字电路有何区别？ 或者是兼容的？ |
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沙发#
发布于：2003-02-26 08:39
一般都是可以兼容的
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板凳#
发布于：2003-03-30 15:02
这是几种接口的标准电平。
LVTTL The LVTTL standard is a single-ended, general-purpose standard for 3.3-V applications. The maximum recommended input voltage for Mercury devices is 4.1 V, which exceeds the 3.9-V requirement of this specification. This standard requires the output buffer to drive to 2.4 V (minimum V OH = 2.4 V) but does not require the use of input reference voltages or termination. The LVTTL interface is defined by JEDEC Standard JESD 8-A, Interface Standard for Nominal 3.0 V/3.3 V Supply Digital Integrated Circuits. LVCMOS LVCMOS is a single-ended general-purpose standard used for 3.3-V applications. The input buffer requirements are the same as the LVTTL requirements, and the output buffer is required to drive to the rail (minimum V OH = V CCIO |
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