This card had an access time of 350ns.  The manual for this card can be found here.   

 

Other MITS S-100 Boards
1K RAM   4K RAM   4K Dynamic RAM  16K RAM   16K Dynamic RAM   4PIO  8080 CPU   VI/RTC   PCI   ADC
2K PROM    8K PROM    88-2 SIO    SIO-B   MITS FDC Boards   TurnKey Board