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. 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. 787-6927
Mfr. Part No.NB3N2304NZDTG
HK$20.035
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. 787-6933
Mfr. Part No.NB3N551DR2G
HK$15.456
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. 121-6394
Mfr. Part No.NB3N2304NZDTG
HK$14.375
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. 162-8130
Mfr. Part No.CDCLVC1104PW
HK$26.775
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. 124-5340
Mfr. Part No.NB3N551MNR4G
HK$8.285
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. 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. 787-6924
Mfr. Part No.NB3N551DG
HK$16.895
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. 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
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. 121-9854
Mfr. Part No.NB3N551DR2G
HK$7.318
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
New
RS Stock No. 217-7831
Mfr. Part No.501MLFT
HK$7.076
Each (On a Reel of 3000)
units
1 20 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9033
Mfr. Part No.CY2309ZXI-1H
HK$98.385
Each (In a Tube of 96)
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. 194-8988
Mfr. Part No.CY22392FXI
HK$143.67
Each
units
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
New
RS Stock No. 217-7832
Mfr. Part No.501MLFT
HK$15.604
Each (In a Pack of 5)
units
1 20 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 217-7838
Mfr. Part No.512MLF
HK$25.902
Each (In a Pack of 5)
units
2 9 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
New
RS Stock No. 216-6159
Mfr. Part No.570AILF
HK$65.24
Each (In a Pack of 2)
units
- 25 mA 170MHz Surface Mount SOIC-8 8 - - - - - - - -
RS Stock No. 194-9034
Mfr. Part No.CY2309ZXI-1H
HK$111.68
Each
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
New
RS Stock No. 217-7840
Mfr. Part No.524SDCGI
HK$25.78
Each (In a Pack of 5)
units
5 22 mA 200MHz Surface Mount SOIC 8 - - - - - - - -