Single in-line memory module
US5532954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S439/951
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A full width single in-line memory module (SIMM) for dynamic random access memory (DRAM) memory expansions. A printed circuit board having a multiplicity of DRAM memory elements mounted thereto is arranged in a data path having a width of 144 bits. The SIMM further includes on-board drivers to buffer and drive signals in close proximity to the memory elements. In addition, electrically conductive traces are routed on the circuit board to reduce loading and trace capacitance to minimize signal skew to the distributed memory elements. The SIMM further includes a high pin density dual read-out connector structure receiving electrical traces from both sides of the circuit board for enhanced functionality. The SIMM is installed in complementary sockets one SIMM at a time to provide memory expansion in full width increments. Finally, symmetrical power and ground routings to the connector structure ensure that the SIMM cannot be inserted incorrectly, wherein physically reversing the SIMM in the connector slot will not reverse power the SIMM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.