Clock Buffers

Clock buffers are semiconductor devices that fan out clock signals and isolates the source from the load. Clock buffers are known to have multiple controllable outputs as well as separate power supplies for outputs or for input/output allowing it to work as a level shifter.

What are clock buffers?

Clock buffers are devices clock buffers create multiple copies of input clocks for individual distribution across a PCB. They are comprised of single-ended output buffers and differential outputs. Single-ended output clock buffers are LVCMOS (Low voltage complementary metal-oxide-semiconductor) while differential output buffers may be LVPECL (Low Voltage Positive Emitter Coupled Logic), HSTL (High-speed transceiver logic) or LVDS (Low Voltage Differential Signaling).

Clock buffers don't alter the frequency properties of the input signal, which in turn minimalises the additive noise which is added to the input whilst in the buffering stage.

Types of clock buffers

Clock buffers are offered in an array of variations such as variations on the maximum operating input frequency that can range from 30 Mhz to 8 Ghz, variety on the maximum supply current it can support and the number of pins installed in the IC.

Some clock buffers feature ultra-low jitter and low skew clock distribution.

Applications of clock buffers

Clock buffers are widely used in applications such as;

  • High-speed instrumentation and line receivers
  • Converter clocking
  • Automated test equipment (ATE)
  • Wireless and wired communications
  • Medical and industrial imaging

...
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Description Price Number of Elements per Chip Maximum Supply Current Maximum Input Frequency Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature Maximum Output Frequency Minimum Operating Supply Voltage
RS Stock No. 802-2067
Mfr. Part No.NB7L572MNG
PHP716.63
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2 110 mA 8GHz Surface Mount QFN 32 5 x 5 x 0.95mm 5mm 5mm 0.95mm 3.6 V +85 °C - 2.375 V
RS Stock No. 802-2064
Mfr. Part No.NB7L1008MMNG
PHP572.64
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8 315 mA 8GHz Surface Mount QFN 32 5 x 5 x 0.95mm 5mm 5mm 0.95mm 3.6 V +85 °C - 2.375 V
RS Stock No. 802-2039
Mfr. Part No.NB6L14SMNG
PHP328.765
Each (In a Pack of 2)
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4 100 mA 2GHz Surface Mount QFN 16 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.8 V +85 °C - -
RS Stock No. 759-0254
Mfr. Part No.ADF4158CCPZ
PHP597.33
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3 23 mA 6.1GHz Surface Mount LFCSP VQ 24 4.1 x 4.1 x 0.8mm 4.1mm 4.1mm 0.8mm 3.3 V +125 °C - 2.7 V
RS Stock No. 162-8984
Mfr. Part No.NB7L572MNG
PHP721.329
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2 110 mA 8GHz Surface Mount QFN 32 5 x 5 x 0.95mm 5mm 5mm 0.95mm 3.6 V +85 °C - 2.375 V
RS Stock No. 162-8976
Mfr. Part No.NB6L14SMNG
PHP246.446
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4 100 mA 2GHz Surface Mount QFN 16 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.8 V +85 °C - -
RS Stock No. 162-8983
Mfr. Part No.NB7L1008MMNG
PHP486.15
Each (In a Tube of 74)
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8 315 mA 8GHz Surface Mount QFN 32 5 x 5 x 0.95mm 5mm 5mm 0.95mm 3.6 V +85 °C - 2.375 V
RS Stock No. 188-5313
Mfr. Part No.CY2305SXI-1H
PHP140.624
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9 35 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.48mm 4.97mm 3.98mm 1.48mm 3.6 V +85 °C 133.33MHz 3 V
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Mfr. Part No.9DB433AGLF
PHP207.88
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- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
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Mfr. Part No.MC100LVEL11DTG
PHP199.394
Each (In a Tube of 100)
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4 30 mA 1GHz Surface Mount TSSOP 8 3.1 x 3.1 x 0.9mm 3.1mm 3.1mm 0.9mm +3.8 V +85 °C - -3 V
RS Stock No. 124-2935
Mfr. Part No.CY2305SXI-1H
PHP614.127
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1 35 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 133.33MHz 3 V
RS Stock No. 787-6716
Mfr. Part No.MC100EL11DG
PHP280.40
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4 31 mA 1.5GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +5.7 V +85 °C - -4.2 V
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Mfr. Part No.CY2292FXC
PHP342.795
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3 65 (Typ.) mA 30MHz Surface Mount SOIC 16 9.98 x 3.98 x 1.47mm 9.98mm 3.98mm 1.47mm 3.6 V +70 °C 66.6MHz 3 V
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9 60 mA 210MHz Surface Mount QFN 48 6 x 6 x 0.75mm 5mm 6mm 0.75mm 3.465 V +85 °C - 3.135 V
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Mfr. Part No.CDCLVC1108PW
PHP237.83
Each (In a Tube of 90)
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6 10 mA 180 MHz, 250 MHz Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 2.7 V, 3.6 V +85 °C 180 MHz, 250 MHz 2.3 V, 3 V
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Mfr. Part No.NB3N551MNR4G
PHP45.68
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4 40 mA 180MHz Surface Mount DFN 8 2 x 2 x 0.95mm 2mm 2mm 0.95mm 5.5 V +85 °C 180MHz 3 V
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PHP207.88
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- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
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Mfr. Part No.CY2305CSXI-1H
PHP320.009
Each (In a Tube of 97)
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1 35 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 133.33MHz 3 V
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PHP800.755
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3 100 (Typ.) mA 166MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.46 V +85 °C 166MHz 3.13 V
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PHP662.941
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2 73 mA - Surface Mount LFCSP VQ 16 3 x 3 x 0.9mm 3mm 3mm 0.9mm 3.63 V +125 °C 7.5GHz 2.97 V