Positive emitter-coupled logic

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Positive emitter-coupled logic, or PECL, is a further development of the emitter-coupled logic (ECL) technology and requires a positive 5V supply instead of a negative 5V supply. The Low-voltage positive emitter-coupled logic (LVPECL) is an improved version of PECL to meet lower voltage requirements. PECL is a differential signaling system and mainly used in high speed and clock distribution circuits.

Logic Levels:

Vee	Vlow	Vhigh	Vcc
GND	2.2 V	3.0 V	5.0 V

[edit] See also

• Emitter-coupled logic (ECL)
• Low-voltage positive emitter-coupled logic (LVPECL)
• Low voltage differential signaling (LVDS)