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
MYR6.63
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. 162-9457
Mfr. Part No.NB3L553MNR4G
MYR5.508
Each (On a Reel of 1000)
units
4 30 mA 200MHz Surface Mount DFN 8 2 x 2 x 0.95mm 2mm 2mm 0.95mm 5.25 V +85 °C 200MHz 2.375 V
RS Stock No. 787-6924
Mfr. Part No.NB3N551DG
MYR7.24
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. 121-9854
Mfr. Part No.NB3N551DR2G
MYR3.667
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. 787-6918
Mfr. Part No.NB3L553MNR4G
MYR10.02
Each (On a Tape of 2)
units
4 30 mA 200MHz Surface Mount DFN 8 2 x 2 x 0.95mm 2mm 2mm 0.95mm 5.25 V +85 °C 200MHz 2.375 V
RS Stock No. 170-3519
Mfr. Part No.NB3N551DG
MYR6.394
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
New
RS Stock No. 217-7830
Mfr. Part No.501MLF
MYR7.676
Each (In a Pack of 5)
units
1 20 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7872
Mfr. Part No.5PB1110NDGI
MYR13.843
Each (In a Tray of 100)
units
11 27 mA 200MHz Surface Mount SOIC 20 - - - - - - - -
New
RS Stock No. 217-7833
Mfr. Part No.511MILF
MYR11.215
Each (In a Tube of 97)
units
1 8 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 759-0254
Mfr. Part No.ADF4158CCPZ
MYR44.95
Each
units
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. 121-6394
Mfr. Part No.NB3N2304NZDTG
MYR5.32
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
New
RS Stock No. 216-6133
Mfr. Part No.2305-1DCG8
MYR2.156
Each (On a Reel of 3000)
units
- 32 mA 133MHz - SOIC-8 8 - - - - - - - -
New
RS Stock No. 217-7848
Mfr. Part No.551SDCGI
MYR7.126
Each (In a Tube of 97)
units
5 18 mA 160MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 912-9646
Mfr. Part No.ADCLK914BCPZ-R2
MYR64.071
Each (On a Reel of 250)
units
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
New
RS Stock No. 216-6245
Mfr. Part No.9DB433AGILF
MYR19.19
Each (In a Pack of 2)
units
- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
RS Stock No. 194-9031
Mfr. Part No.CY2309SXI-1H
MYR54.233
Each (In a Tube of 48)
units
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. 194-9022
Mfr. Part No.CY2309NZSXC-1H
MYR57.54
Each
units
1 32 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +70 °C 133.3MHz 3 V
RS Stock No. 759-1547
Mfr. Part No.ADCLK914BCPZ-R2
MYR70.23
1 Tape of 1
Tape(s)
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
RS Stock No. 802-2064
Mfr. Part No.NB7L1008MMNG
MYR48.73
Each
units
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. 194-9015
Mfr. Part No.CY2308SXI-1H
MYR29.19
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