HMC7044, HMC7043 vs LTC6952, LTC6953

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ADI offers the two lowest jitter JESD204B/C multi-output clock generation devices on the market in the <4.5GHz frequency range. While these devices are very similar in some respects, there are some fairly significant differences that may make one device better than the other for your application. These differences are listed in the table below. 
 
 For generating large clock trees. Both parts have a companion clock distribution device, HMC7043 and LTC6953, that allow for synchronizing clocks and SYSREFs across multiple chips. 
 The HMC7044 and HMC7043 family have specialized synchronization functions that allow for multiple chip synchronization of an unlimited number of clock and SYSREF signals. 
 Likewise, the LTC6952 and LTC6953 family have specialized synchronization functions that allow for multiple chip synchronization of an unlimited number of clock and SYSREF signals. 
 For multiple chip synchronization, the synchronization functions between the HMC7044/43 and LTC6952/53 families are different. In other words, connecting a LTC6952 output to a HMC7043 input (or a HMC7044 output to a LTC6953 input) will not synchronize the outputs of both chips as desired. 
 Refer to the product pages and datasheets for more information on multiple chip synchronizations: 
 www.analog.com/hmc7044 
 www.analog.com/ltc6952

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LTC6952: FAQ