Common Logic Level Standard

This article mainly introduces the common logic level standards, such as CMOS, LVCMOS, TTL, LVTTL, LVDS, PECL / LVPECL, CML, VML, HSTL, SSTL, etc.

LVPECL:

Highest rate: LVPECL is 10 + Gbps

CML:

Maximum rate: 10 + Gbps

Coupling mode:Dc coupling is used between CML and CML when the VCC is the same, and AC coupling is used between CML and CML when the VCC is different

SSTL electrical level

The standard is specifically for high-speed memory (especially SDRAM) interfaces, which works at up to 200 MHz, and SSTL is mainly used in DDR memory. And the identical as HSTL. V¬¬CCIO=2.5V, The input is a comparator structure with a reference level of 1.25V at one end and an input signal at the other end. The reference level requirements are relatively high (1% accuracy),HSTL and SSTL are mostly used below 300M.

The above is the introduction of common logic level standards brought by Shenzhen HDV Phoelectron Technology Co., LTD. Our related optical module series includes :SFP optical module, SFF optical module, communication optical module, 1×9 optical module, communication equipment optical module, dual fiber bidirectional optical module and so on. If you have more types of module requirements, please consult further.