onsemi SCANPSC110FSC

IC INTERFACE SPECIALIZED 28SOIC / Interface 28-SOIC

Scan System and Board Test Products -IEEE1149.1 SCAN JTAG Port

Microprocessor Circuit, CMOS, PDSO28

Multiplexer IC; Package/Case:28-SOIC; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Mounting Type:Surface Mount RoHS Compliant: Yes

The SCANPSC110F Bridge extends the IEEE Std. 1149.1 test bus into a multidrop test bus environment. The advantage of a hierarchical approach over a single serial scan chain is improved test throughput and the ability to remove a board from the system and retain test access to the remaining modules. Each SCANPSC110F Bridge supports up to 3 local scan rings which can be accessed individually or combined serially. Addressing is accomplished by loading the instruction register with a value matching that of the Slot inputs. Backplane and inter-board testing can easily be accomplished by parking the local TAP Controllers in one of the stable TAP Controller states via a Park instruction. The 32-bit TCK counter enables built in self test operations to be performed on one port while other scan chains are simultaneously tested.