1. A 0.54 pJ/b 20 Gb/s Ground-Referenced Single-Ended Short-Reach Serial Link in 28 nm CMOS for Advanced Packaging Applications.
- Author
-
Poulton, John W., Dally, William J., Chen, Xi, Eyles, John G., Greer, Thomas H., Tell, Stephen G., Wilson, John M., and Gray, C. Thomas
- Subjects
TRANSMITTERS (Communication) ,NOISE ,SEMICONDUCTOR switches ,COMPLEMENTARY metal oxide semiconductors ,SIGNALS & signaling - Abstract
High-speed signaling over high density interconnect on organic package substrates or silicon interposers offers an attractive solution to the off-chip bandwidth limitation problem faced in modern digital systems. In this paper, we describe a signaling system co-designed with the interconnect to take advantage of the characteristics of this environment to enable a high-speed, low area, and low-power die to die link. Ground-Referenced Signaling (GRS) is a single-ended signaling system that eliminates the major problems traditionally associated with single-ended design by using the ground plane as the reference and signaling above and below ground. This design employs a novel charge pump driver that additionally eliminates the issue of simultaneous switching noise with data independent current consumption. Silicon measurements from a test chip implementing two 16-lane links, with forwarded clocks, in a standard 28 nm process demonstrate 20 Gb/s operation at 0.54 pJ/bit over 4.5 mm organic substrate channels at a nominal 0.9 V power supply voltage. Timing margins at the receiver are >0.3 UI at a BER of <10^-12. We estimate BER <10^-25 at the eye center. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF