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正射极耦合逻辑（ＰＥＣＬ）是成帧器高速Ｉ／Ｏ的标准逻辑电平，这种输出方式耗电较大，为降低功耗需采用一些间接的解决方案。Ｍａｘｉｍ推出的ＭＡＸ３８８１、ＭＡＸ３８９１复用／解复用器的并行通道采用单端ＰＥＣＬＩ／Ｏ，可有效解决上述问题，但在单端与差分接口之间
The positive emitter coupled logic (PECL) is the standard logic level for the framer high-speed I / O. This type of output consumes a lot of power and requires some indirect solution to reduce power consumption. Maxim introduced MAX3881, MAX3891 multiplexer / demultiplexer parallel channel single-ended PECLI / O, which can effectively solve the above problems, but in between single-ended and differential interface