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. 162-8976
Mfr. Part No.NB6L14SMNG
TWD162.50
Each (In a Tube of 123)
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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. 802-2039
Mfr. Part No.NB6L14SMNG
TWD216.50
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. 787-6924
Mfr. Part No.NB3N551DG
TWD64.00
Each (In a Pack of 2)
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4 40 mA 180MHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C 180MHz 3 V
RS Stock No. 170-3519
Mfr. Part No.NB3N551DG
TWD53.90
Each (In a Tube of 98)
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4 40 mA 180MHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C 180MHz 3 V
RS Stock No. 121-9854
Mfr. Part No.NB3N551DR2G
TWD26.70
Each (On a Reel of 2500)
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- - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C - 3 V
RS Stock No. 787-6933
Mfr. Part No.NB3N551DR2G
TWD58.40
Each (In a Pack of 5)
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- - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C - 3 V
New
RS Stock No. 217-7845
Mfr. Part No.551MLF
TWD63.80
Each (In a Pack of 5)
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5 18 mA 160MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9033
Mfr. Part No.CY2309ZXI-1H
TWD371.40
Each (In a Tube of 96)
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1 35 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 133.3MHz 3 V
New
RS Stock No. 217-7817
Mfr. Part No.2305NZ-1HDCGI
TWD37.40
Each (In a Tube of 97)
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6 32 mA 133MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9030
Mfr. Part No.CY2309SXI-1
TWD665.00
Each
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1 35 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 133.3MHz 3 V
RS Stock No. 194-8988
Mfr. Part No.CY22392FXI
TWD542.00
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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
RS Stock No. 194-9034
Mfr. Part No.CY2309ZXI-1H
TWD422.00
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1 35 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 133.3MHz 3 V
New
RS Stock No. 216-6248
Mfr. Part No.9DB433AGLF
TWD126.20
Each (In a Pack of 5)
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- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
New
RS Stock No. 217-7818
Mfr. Part No.2305NZ-1HDCGI
TWD37.80
Each (In a Pack of 10)
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6 32 mA 133MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7814
Mfr. Part No.2305-1DCG
TWD27.60
Each (In a Pack of 10)
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6 32 mA 133MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 188-5313
Mfr. Part No.CY2305SXI-1H
TWD101.10
Each (In a Tube of 97)
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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
RS Stock No. 194-9040
Mfr. Part No.CY23EP05SXI-1H
TWD534.00
Each
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1 30 mA, 45 mA 220MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 220MHz 3 V
New
RS Stock No. 217-7835
Mfr. Part No.512MILF
TWD108.20
Each (In a Tube of 97)
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2 9 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7854
Mfr. Part No.553SDCGI
TWD53.90
Each (In a Tube of 97)
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5 25 mA 200MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7852
Mfr. Part No.553MLF
TWD71.50
Each (In a Tube of 97)
units
5 25 mA 200MHz Surface Mount SOIC 8 - - - - - - - -