** Update 11-Jan-16: the CC-DEVPACK-DEBUG is now back in stock **
Unfortunately, the DevPack Debugger (CC-DEVPACK-DEBUG) is currently out of stock. While we are working to replenish inventory, TI recommends using the SmartRF06 Evaluation Board (SmartRF06EBK) for debugging & programming the CC2650 SensorTag (CC2650STK). The SmartRF06 Evaluation Board includes a XDS100v3 JTAG debugger which can be used with an optional 10-pin cable to interface with the SensorTag.
The SmartRF06 Evaluation Board can ordered from the TI eStore or an authorized distributor under the “Order Now” section of this page: http://www.ti.com/tool/smartrf06ebk
(Note that the SmartRF06 Evaluation Board is also included in the CC2650DK. All kits that include the SmartRF06 board ordered from TI as of Dec 2015 are v1.3 and include the 10 pin cable)
The 10-pin cable can also be ordered from 3rd party distributors:
Mouser: http://no.mouser.com/ProductDetail/Embedded-Artists/EA-ACC-012/?qs=sGAEpiMZZMsJiFh04Lj2rkPL73m%252bbb73cvQgXaLy9I4%3dDigiKey: http://www.digikey.com/product-detail/en/ARM-JTAG-20-10/1188-1016-ND/3471401
You may also use a supported debugger as listed on the Complete Tools Overview wiki page.
We will update this post with more information as it becomes available. We apologize for any inconvenience.