Manufacturer: Aitech

As the processing power of 3U cPCI SBCs continues to increase, expanding system functionality by means of PCI Mezzanine Cards (PMCs) is frequently the method of choice for maximizing performance while minimizing system size, power consumption, and cost.

In order to increase package density, Aitech has developed the CM951 PMC Carrier with onboard 1553 interface and TTL I/Os in addition to hosting a PMC like in the Aitech CM950 Carrier. When used in conjunction with our PowerPC® SBCs that provide cPCI backplane interface, such as Aitech's S950, the CM951 adds an additional PMC site per backplane slot. Depending on the SBC, up to seven CM951s can be used in an eight-slot 3U cPCI Enclosure with an S950 SBC configures as a system controller. CM951 architecture is based on a PCI-PCI bridge implemented in a pair of anti-fuse FPGAs. The bridge connects the primary 32-bit 33.333 MHz PCI expansion bus to a secondary 32-bit 33.333 MHz PCI bus on which the PMC site resides. All cPCI interrupts are routed from the PMC site directly to the cPCI backplane bus interface. Both the engineering model and flight model are designed in conduction-cooled form factor to host a conduction-cooled PMC such as the Aitech the S710 Communication and 1394a PMC. All I/Os are routed to the cPCI backplane per “PMC on CompactPCI” PIGMG 2.3, R1.0 specifications (dated August 7, 1998).

Designed for harsh space environment applications, the CM951 flight model has an unshielded total dose capability of 45 Krad (Si) and an optional 100 Krad version can be available upon request. With its extremely low power consumption (7W maximum – 6.5W on 5Vdc and 0.5W on 3.3Vdc), the CM951 provides maximum expansion capabilities while consuming minimum resources. In addition to +5Vdc and +3.3Vdc, +12Vdc and -12Vdc is routed from cPCI P1 connector Pin D1 and Pin B1 to the PMC connectors J12-Pin1 and J11-Pin2 respectively.


FeaturesLess than 7W Power Consumption (depending on 1553 traffic duty cycle)
Design for Use with Multiple S950 SBCs and Conduction-Cooled PMCs in an Enclosure
Radiation Tolerant PCI-PCI Bridge Design for use in Rugged Space Application
Accommodate a Single-Wide Conduction-Cooled PMC
Design in Single-Slot 3U CompactPCI (cPCI) Form Factor
Support PCI Bus Specification 2.3 and PCI Bridge Specification 1.1
Support for Full Arbitration of PMC Master Operations
PMC I/O routed to cPCI J2 Connector for Backplane Routing
Both Engineering Model and Flight Model are available in Conduction-Cooled format per VITA 30.1-2002 Specification
Optional Radiation Hardened Version is Available Upon Request
ConnectionsOne MIL-STD-1553B Dual Redundant BC/RT/MT (STANAG 3838 compliant) Channel
Sixteen TTL Discrete Inputs or Outputs (configured in two groups of eight channels)



ExpansionSupport PCI Bus Specification 2.3 and PCI Bridge Specification 1.1
One standard PMC slot
Electrical7W maximum – 6.5W on 5Vdc and 0.5W on 3.3Vdc
MechanicalBoth Engineering Model and Flight Model are available in Conduction-Cooled format per VITA 30.1-2002 Specification
Conformal CoatingConformal optional (series 100), standard (series 200/500). Acrylic or Silicone
TemperatureSeries-100 Lab Grade EDU
• Temperature range (operation): 0 to +55°C
• Temperature range (storage): -40 to +85°C

Series-200 Qual Unit
• Temperature range (operation): -40 to +71°C
• Temperature range (storage): -50 to +100°C

Series-500 Radiation Tolerant Flight Unit
• Temperature range (operation): -40 to +65°C (space vacuum)
• Temperature range (storage): -62 to +125°C

Ruggedisation level is determined in the part numbering scheme - refer to datasheet for further details
HumiditySeries-100 Lab Grade EDU: 0-90%
Series-200 Qual Unit: 0-100% (coating as standard)
Series-500 Radiation Tolerant Flight Unit: 0-100% (coating as standard)
AltitudeSeries-100 Lab Grade EDU: 15,000ft
Series-200 Qual Unit: 70,000ft
Series-500 Radiation Tolerant Flight Unit: 10 to the -4 Torr
VibrationSeries-100 Lab Grade EDU:
• Random (g2/Hz): 20-2000Hz/0.02 g2/Hz
• Sine (g PEAK): 10-100Hz/2g

Series-200 Qual Unit:
• Random (g2/Hz): 20-2000Hz/0.1 g2/Hz
• Sine (g PEAK): 50-500Hz/10g

Series-500 Radiation Tolerant Flight Unit:
• Conduction-cooled: Random (g2/Hz): 20-2000Hz/0.1 g2/Hz
• Conduction-cooled: Sine (g PEAK): 50-500Hz/10g
ShockSeries-100 Lab Grade EDU: 20g/6mS
Series-200 Qual Unit: 40g/11ms, 100g/6ms
Series-500 Radiation Tolerant Flight Unit: 40g/11ms, 100g/6ms (pyro-shock 875g)
Warranty1 Year


BoardRefer to datasheet for ordering part number scheme
Recab UK
Interested in this Product?

Get In Touch