Function Module to get Date and Time out of Timestamp

Hi,

Source system timestamp field CREATED_TS of Type DEC-15

BW PSA data in format 20.140.707.105.948

In DSO, I have created two target InfoObjects; one for Date and one for Time.

In transformation from PSA to DSO, in field level routine, I want to split timestamp into Date and Time.

There is a function module CACS_TIMESTAMP_GET_DATE in source system but it is not available in BW. Another function module ADDR_CONVERT_TIMESTAMP_TO_DATE which is available in BW but returns only Date. 

Does anyone know a function module in BW which takes Timestamp (PSA data in format 20.140.707.105.948) and returns Date and Time.

Much better would be a FM which take timestamp and also Timezone  and returns Date and Time.

Thanks

Ahmad