Clocks & Timing

A clock multiplexer (clock MUX) selects one of the several inputs and propagates that signal forward. Renesas offers several types of clock multiplexers that not only include a multiplexing function, but also clock divider and fanout buffer functions integrated on the same device. This not only reduces the total part count in a clock tree but can also help improve the performance in many cases.

Product Selection Table

    Processing table
    Function
    Outputs (#)
    Output Type
    Output Freq Range (MHz)
    Input Freq (MHz)
    Inputs (#)
    Input Type
    Output Banks (#)
    Core Voltage (V)
    Output Voltage (V)
    Divider Value
    Output Skew (ps)
    Additive Phase Jitter Typ RMS (fs)
    105°C Max. Case Temp.
    Part Number
    5P1103
    Programmable Fanout Buffer    		 Buffer, Multiplexer 3 HCSL, LVCMOS, LVDS, LVPECL 1 - 350 1 - 350 2 Crystal, HCSL, LVCMOS, LVDS, LVPECL 3 1.8, 2.5, 3.3 1.8, 2.5, 3.3 35
    5P1105
    Programmable Fanout Buffer    		 Buffer, Multiplexer 5 HCSL, LVCMOS, LVDS, LVPECL 1 - 350 1 - 350 2 Crystal, HCSL, LVCMOS, LVDS, LVPECL 5 1.8, 2.5, 3.3 1.8, 2.5, 3.3 35
    850S1201I
    12:1 Single-Ended Multiplexer    		 Multiplexer 1 LVCMOS 0 - 250 0 - 250 12 LVCMOS 1 2.5, 3.3 2.5, 3.3 350
    853S012I
    12:1 Differential-to-3.3V,2.5V LVPECL Clock/Data Multiplexer    		 Multiplexer 1 LVPECL 0 - 3200 0 - 3200 12 CML, LVDS, LVPECL 1 2.5, 3.3 2.5, 3.3 144
    853S014I
    Low Skew,1-to-5 Differential-to-2.5V,3.3V LVPECL/ECL Fanout Buffer    		 Buffer, Multiplexer 5 LVPECL 0 - 2000 0 - 2000 2 CML, LVDS, LVPECL, SSTL 1 2.5, 3.3 2.5, 3.3 55 100
    853S01I
    2:1 Differential-to-LVPECL Multiplexer    		 Multiplexer 1 LVPECL 0 - 2500 0 - 2500 2 LVDS, LVPECL 1 2.5, 3.3 2.5, 3.3 24
    853S057I
    4:1 Differential-to-3.3V, 2.5V LVPECL / ECL Clock Multiplexer    		 Multiplexer 1 LVPECL 0 - 3000 0 - 3000 4 CML, LVDS, LVPECL, SSTL 1 2.5, 3.3 2.5, 3.3 73
    853S111BI
    Low Skew, 1-to-10 Differential-to-2.5V, 3.3V LVPECL / ECL Fanout Buffer    		 Buffer, Multiplexer 10 LVPECL 0 - 2500 0 - 2500 2 LVDS, LVPECL, SSTL 1 2.5, 3.3 2.5, 3.3 50 30
    854S01I
    2:1 Differential-to-LVDS Multiplexer    		 Multiplexer 1 LVDS 0 - 2500 0 - 2500 2 LVDS, LVPECL 1 3.3 3.3 60
    854S054I
    4:1 Differential-to-LVDS Clock Multiplexer    		 Multiplexer 1 LVDS 0 - 2500 0 - 2500 4 CML, LVDS, LVPECL 1 3.135 3.3 147
    854S058I
    8:1 Differential-to-LVDS Clock Multiplexer    		 Multiplexer 1 LVDS 0 - 2500 0 - 2500 8 LVDS, LVPECL, SSTL 1 3.3 3.3 65
    8L30110
    Crystal or Differential to LVCMOS/ LVTTL Clock Buffer    		 Buffer, Multiplexer 10 LVCMOS 0 - 200 0 - 200 3 Crystal, HCSL, LVCMOS, LVDS, LVPECL 1 2.5, 3.3 1.5, 1.8, 2.5, 3.3 63 22
    8L30205
    Crystal or Differential to LVCMOS/ LVTTL Clock Buffer    		 Buffer, Multiplexer 5 LVCMOS 0 - 200 0 - 200 2 Crystal, HCSL, LVCMOS, LVDS, LVPECL 2 2.5, 3.3 1.5, 1.8, 2.5, 3.3 30 30
    8L30210
    Crystal or Differential to LVCMOS/ LVTTL Clock Buffer    		 Buffer, Multiplexer 10 LVCMOS 0 - 200 0 - 200 3 Crystal, HCSL, LVCMOS, LVDS, LVPECL 2 2.5, 3.3 1.5, 1.8, 2.5, 3.3 30 30
    8P34S1204
    2:4 LVDS 1.8V / 2.5V Fanout Buffer for 1PPS and High-Speed Clocks    		 Buffer, Multiplexer 4 LVDS 0 - 1200 0 - 1200 2 CML, LVDS, LVPECL 1 1.8 1.8 14 42
    8P34S1208
    2:8 LVDS 1.8V / 2.5V Fanout Buffer for 1PPS and High-Speed Clocks    		 Buffer, Multiplexer 8 LVDS 0 - 1200 0 - 1200 2 CML, LVDS, LVPECL 1 1.8 1.8 20 41
    8P34S1212
    2:12 LVDS 1.8V / 2.5V Fanout Buffer for 1PPS and High-Speed Clocks    		 Buffer, Multiplexer 12 LVDS 0 - 1200 0 - 1200 2 CML, LVDS, LVPECL 1 1.8 1.8 12 73
    8SLVD1204
    2:4, LVDS Output Fanout Buffer, 2.5V    		 Buffer, Multiplexer 4 LVDS 0 - 2000 0 - 2000 2 LVDS, LVPECL 1 2.5 2.5 20 95
    8SLVD1204-33I
    2:4, LVDS Output Fanout Buffer, 3.3 V    		 Buffer, Multiplexer 4 LVDS 0 - 2000 0 - 2000 2 LVDS, LVPECL 1 3.3 3.3 20 95
    8SLVP1204
    2:4 LVPECL Output Fanout Buffer    		 Buffer, Multiplexer 4 LVPECL 0 - 2000 0 - 2000 2 CML, LVDS, LVPECL 1 2.5, 3.3 2.5, 3.3 64 32 Yes
    8SLVP1208
    2:8,LVPECL Output Fanout Buffer    		 Buffer, Multiplexer 8 LVPECL 0 - 2000 0 - 2000 2 CML, LVDS, LVPECL 1 2.5, 3.3 2.5, 3.3 64 31.1
    8SLVP1212I
    2:12,3.3V,2.5V LVPECL Fanout Buffer    		 Buffer, Multiplexer 12 LVPECL 0 - 2000 0 - 2000 2 CML, LVDS, LVPECL 1 2.5, 3.3 2.5, 3.3 15 45
    8T39S11A
    Crystal or Differential to Differential Clock Fanout Buffer    		 Buffer, Multiplexer 10 HCSL, LVDS, LVPECL 0 - 250 0 - 250 3 Crystal, HCSL, LVDS, LVPECL 2 2.5, 3.3 2.5, 3.3 32 26
    9DML4493
    4:4 Clock MUX for PCI Express Gen1–6    		 Multiplexer 4 LP-HCSL 1 - 200 0.000001 - 350 4 HCSL 2 1.8, 2.5, 3.3 1.8, 2.5, 3.3 22 78
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    Documentation

    Title Type Date
    Clock Distribution Overview
    PDF217 KB
    Overview