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. 787-6933
Mfr. Part No.NB3N551DR2G
HK$14.276
Each (In a Pack of 5)
units
- - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C - 3 V
RS Stock No. 162-8130
Mfr. Part No.CDCLVC1104PW
HK$24.432
Each (In a Tube of 150)
units
6 10 mA 180 MHz, 250 MHz Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm 2.7 V, 3.6 V +85 °C 180 MHz, 250 MHz 2.3 V, 3 V
RS Stock No. 787-6936
Mfr. Part No.NB3N551MNR4G
HK$16.894
Each (In a Pack of 5)
units
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
RS Stock No. 121-6394
Mfr. Part No.NB3N2304NZDTG
HK$12.164
Each (In a Tube of 100)
units
4 25 mA 140MHz Surface Mount TSSOP 8 3.1 x 4.5 x 0.95mm 3.1mm 4.5mm 0.95mm 3.6 V +85 °C 140MHz 3 V
RS Stock No. 121-6383
Mfr. Part No.MC100EL11DG
HK$41.601
Each (In a Tube of 98)
units
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
RS Stock No. 170-3519
Mfr. Part No.NB3N551DG
HK$14.291
Each (In a Tube of 98)
units
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
HK$6.777
Each (On a Reel of 2500)
units
- - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C - 3 V
RS Stock No. 787-6927
Mfr. Part No.NB3N2304NZDTG
HK$16.83
Each (In a Pack of 2)
units
4 25 mA 140MHz Surface Mount TSSOP 8 3.1 x 4.5 x 0.95mm 3.1mm 4.5mm 0.95mm 3.6 V +85 °C 140MHz 3 V
RS Stock No. 124-5340
Mfr. Part No.NB3N551MNR4G
HK$7.663
Each (On a Reel of 1000)
units
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
RS Stock No. 787-6924
Mfr. Part No.NB3N551DG
HK$15.51
Each (In a Pack of 2)
units
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. 817-5941
Mfr. Part No.CDCLVC1104PW
HK$36.298
Each (In a Pack of 5)
units
6 10 mA 180 MHz, 250 MHz Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm 2.7 V, 3.6 V +85 °C 180 MHz, 250 MHz 2.3 V, 3 V
RS Stock No. 787-6716
Mfr. Part No.MC100EL11DG
HK$48.97
Each
units
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
New
RS Stock No. 217-7847
Mfr. Part No.551SCMGI
HK$16.20
Each (In a Pack of 5)
units
5 18 mA 160MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 787-6841
Mfr. Part No.MC10EP11DG
HK$62.84
Each
units
4 -40 mA 3GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +5.5 V +85 °C - -3 V
RS Stock No. 787-6914
Mfr. Part No.NB3L553DG
HK$20.035
Each (In a Pack of 2)
units
4 30 mA 200MHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.25 V +85 °C 200MHz 2.375 V
New
RS Stock No. 216-6249
Mfr. Part No.9DB433AGLFT
HK$15.92
Each (On a Reel of 2000)
units
- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
New
RS Stock No. 217-7837
Mfr. Part No.512MLF
HK$20.516
Each (In a Tube of 97)
units
2 9 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7848
Mfr. Part No.551SDCGI
HK$0.287
Each (In a Tube of 97)
units
5 18 mA 160MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9015
Mfr. Part No.CY2308SXI-1H
HK$0.101
Each (In a Tube of 48)
units
1 70 mA 133.3MHz Surface Mount SOIC 16 9.98 x 3.98 x 1.47mm 9.98mm 3.98mm 1.47mm 3.6 V +85 °C 133.3MHz 3 V
RS Stock No. 189-8677
Mfr. Part No.MAX2470EUT+T
HK$20.372
Each (In a Pack of 5)
units
2 4.5 mA 500MHz Surface Mount SOT-23 6 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm 5.5 V +85 °C - 2.7 V