JT2702/DDC (Dual DIMM Carrier) is a DIMM DIOS break-out adapter that enables easy connection of JT 2122/MPV DIMM DIOS channels to UUT test points or connectors.

DIOS systems increase the test coverage of a printed circuit board by providing access to connectors and/or test points (pads). The additional IO access increases the possibilities for testing logic clusters and enhances interconnection test coverage using boundary-scan.

The JT 2702/DDC is typically used in custom test adapters or fixtures where a large number of digital I/O channels are required with a minimum space overhead. By populating the JT 2702/DDC with one or two of JTAG Technologies JT 2122/MPV DIMM DIOS modules I/O systems with 128 or 256 digital channels can be built. Since the units can also be serially linked, a channel count in excess of 1000 I/Os is easily achieved at a relatively low cost. The DIOS IO channels of the DIMMs are routed to eight standard 40-way 0.1″ IDC connectors.