Gunning transceiver logic

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Gunning Transceiver Logic - also known as GTL - is the name of a signaling technology used primarily in buses and backplanes . It uses a voltage swing between 0.4 and 1.2 volts, which is significantly lower than, for example, that of the widespread TTL and CMOS logic. The maximum signal frequency is up to 100 MHz, in some areas of application even higher.

GTL was developed by William Gunning while working for Xerox at Xerox PARC . The JEDEC has GTL under the name JESD 8-3 (1993) standardized.

Intel uses further developed GTL modifications with the designations GTL + , AGTL and AGTL + as signaling technology for the bus protocols of their CPUs of the P6 , NetBurst and Core processor families. For this purpose, among other things, steeper signal edges and other logic levels were defined. Depending on the source, AGTL means either Assisted Gunning Transceiver Logic or Advanced Gunning Transceiver Logic .

Web links

  • Fairchild Semiconductor Application Note: AN-1070 (PDF; 111 kB) - GTLP vs. GTL: A Performance Comparison from a System Perspective, 1997
  • Texas Instruments Application Report: SCEA003A (PDF; 189 kB) - GTL / BTL: A Low-Swing Solution for High-Speed ​​Digital Logic, 1997
  • [1] - Understand GTL tensions