ZHCSH72I September 2011 – December 2017 LMK00301
The differential output buffer type for Bank A and Bank B outputs can be separately configured using the CLKoutA_TYPE[1:0] and CLKoutB_TYPE[1:0] inputs, respectively, as shown in Table 4 . For applications where all differential outputs are not needed, any unused output pin should be left floating with a minimum copper length (see note below) to minimize capacitance and potential coupling and reduce power consumption. If an entire output bank will not be used, it is recommended to disable (Hi-Z) the bank to reduce power. Refer to Termination and Use of Clock Drivers for more information on output interface and termination techniques.
For best soldering practices, the minimum trace length for any unused output pin should extend to include the pin solder mask. This way during reflow, the solder has the same copper area as connected pins. This allows for good, uniform fillet solder joints helping to keep the IC level during reflow.
|CLKoutX BUFFER TYPE|
(BANK A or B)