• 267 MB/s RACE++ switch-fabric interconnect
• Crossbar-connected on board and between boards
• Up to 18 PowerPC® microprocessors on a 9U board
• Up to 4 PowerPC microprocessors on a 6U board
• Dual-port ready for two RACE++ ports

• Maximizes both on-board bisection bandwidth and the number of alternative paths for adaptive routing
• Allows system designers to configure the right balance of processing, memory, and I/O to meet specific application requirements
• High bandwidth, low latency
• Backward-compatible

Electrical/Mechanical Specifications

Input voltage:
4.75 to 5.25 VDC

Power (exclusive of daughtercards):
MCJ6: 5W at 5 VDC
MCJ9: 15W* at 5 VDC

*Maximum configuration. Power consumption of MCJ9 varies with the number and type of daughtercards due to power conversion circuitry on the motherboard. Minimum efficiency in conversion from 5V to 3.3V used by some daughtercards is 85%.

Dimensions:
MCJ6: 6.30 x 9.19 in
MCJ9: 14.44 x 15.75 in

Slot-to-slot spacing:
0.8 in

Weight without daughtercards:
MCJ6: 0.8 lb
MCJ9: 3.0 lb

Environmental Specifications

Mercury offers multiple categories of environmental ruggedness for MCJ Series motherboards. The specifications detailed below are for the MCJ Series motherboards for standard commercial environments.

Recommended minimum airflow (per slot):
MCJ6: 10 CFM
MCJ9: 24 CFM

Operating temperature:
0°C to 40°C up to an altitude of 10,000 ft
(inlet air temperature at recommended minimum airflow)

Storage temperature:
-40°C to +85°C

Relative humidity:
10 to 90% (non-condensing)

As altitude increases, air density decreases, hence the cooling effect of a particular number of CFM decreases. Many manufacturers specify altitude and temperature ranges that are not simultaneous. Notice that the above operating temperature is specified simultaneously with an altitude. Different limits can be achieved by trading among altitude, temperature, performance, and airflow. Contact Mercury for more information.

Ordering Information

MCJ6:
Part number: 910-08000
Model number: MCJ6
Description: 6U VME RACE++ motherboards 160-pin (5-row) connectors

MCJ9:
Part Number: 910-08001
Model: MCJ9
Description: 9U VME RACE++ motherboards 160-pin connectors for P1 and P2

Call Mercury for information on ordering 96-pin (3-row) versions. Some daughtercard configurations require 5-row connectors on both motherboards and VME backplane to provide required power.