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LMK1C1104: Clock buffer/fanout selection

Daniel De Sousa
Intellectual 580 points
Part Number: LMK1C1104
Other Parts Discussed in Thread: SN74AXC4T774-Q1, SN74AXC4T245-Q1, SN74AXC4T774, SN74AXCH4T245, SN74LV4T125, SN74AVC4T245-Q1, SN74AVCH4T245-EP, SN74AVC4T774, SN74AXC4T245, SN74AVC4T245, SN74AVCH4T245, SN74AUC125, SN74AUC126, SN74LVC125A, SN74LVC126A, SN74AUP3G17, SN74AUP3G34, , LMK1C1103, LMK1C1102

Hi there, we are looking for a clock splitter / buffer  / fanout device for a clock with the following specifications:
24 MHz
1.8V
50 ohm single-ended impedance
Device must support 1:2 and 1:3 fanout

I have found that the following parts could work but would like a recommendation from TI. Is there an optimal choice? Would any of them not work?


Voltage translators & level shifters
SN74AXC4T774-Q1
SN74AXC4T245-Q1
SN74AXC4T774
SN74AXCH4T245
SN74LV4T125
SN74AVC4T245-Q1
SN74AVCH4T245-EP
SN74AVC4T774
SN74AXC4T245
SN74AVC4T245
SN74AVCH4T245

Buffers, drivers & transceivers
SN74AUC125
SN74AUC126
SN74LVC125A
SN74LVC126A
SN74AUP3G17
SN74AUP3G34

Clock buffers
LMK1C1104

  • +1
    TI__Mastermind 31610 points

    Daniel,

    Strongly recommend LMK1C1104, or potentially the 1:2 and 1:3 variants LMK1C1102 and LMK1C1103. These devices are tested with clock signals and are designed for low jitter. Level-shifters and logic buffers/transceivers are not tested for high-frequency jitter performance, 1/f noise, or output floor, and almost never have 50Ω output impedance.

    Regards,

    Derek Payne