The MM-6155D is a 64-bit/33MHz SDRAM PMC (PCI Mezzanine Card) capable of burst mode transfers of up to 264MB/s.

PMC's have become the standard form factor of choice for I/O on today's high performance board level CompactPCI, PCI, and VME cards. PMC's are electrically equivalent to the traditional PCI bus. Most CompactPCI and VME single board computers now include one and often two PMC sites for flexible I/O integration.

The MM-6155D can easily provide buffer expansion memory on cards with PMC sites. The MM-6155D has a PLD that controls data management and provides double bit error detection and single bit correction. Instead of just generating an interrupt, a specialized Mailbox DMA notifies the host in host memory when transfers are complete so the host does not have to poll the status of the DMA.

Reliability is ensured by burn-in and running memory diagnostics that check operations for 48 hours while temperature-cycling boards from 0° to 70° C.