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. 124-5340
Mfr. Part No.NB3N551MNR4G
SGD1.428
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. 787-6936
Mfr. Part No.NB3N551MNR4G
SGD2.67
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. 162-8130
Mfr. Part No.CDCLVC1104PW
SGD4.16
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. 817-5941
Mfr. Part No.CDCLVC1104PW
SGD5.218
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. 807-1713
Mfr. Part No.ADCLK944BCPZ-WP
SGD12.09
Each
units
4 165 mA - Surface Mount LFCSP 16 3.1 x 3.1 x 0.75mm 3.1mm 3.1mm 0.75mm 3.63 V +85 °C - 2.375 V
RS Stock No. 188-5313
Mfr. Part No.CY2305SXI-1H
SGD4.279
Each (In a Tube of 97)
units
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. 194-8988
Mfr. Part No.CY22392FXI
SGD26.95
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
RS Stock No. 162-6305
Mfr. Part No.LMV112SD/NOPB
SGD0.98
Each (On a Reel of 1000)
units
2 2.1 mA 40MHz Surface Mount WSON 8 3 x 3 x 0.8mm 3mm 3mm 0.8mm 5 V +85 °C - 2.4 V
RS Stock No. 162-8133
Mfr. Part No.CDCLVC1108PW
SGD6.33
Each (In a Tube of 90)
units
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
RS Stock No. 121-6388
Mfr. Part No.MC100LVEL11DTG
SGD5.05
Each (In a Tube of 100)
units
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. 194-9009
Mfr. Part No.CY2305CSXI-1H
SGD9.583
Each (In a Tube of 97)
units
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. 194-8987
Mfr. Part No.CY22392FXI
SGD21.893
Each (In a Tube of 96)
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
RS Stock No. 194-9024
Mfr. Part No.CY2309NZSXI-1H
SGD18.13
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
RS Stock No. 145-3381
Mfr. Part No.NB3L553DG
SGD2.40
Each (In a Tube of 98)
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
RS Stock No. 194-8994
Mfr. Part No.CY2292FXC
SGD10.24
Each (In a Pack of 2)
units
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
RS Stock No. 759-1547
Mfr. Part No.ADCLK914BCPZ-R2
SGD23.22
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. 802-2051
Mfr. Part No.NB6N14SMNG
SGD15.50
Each
units
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. 165-4056
Mfr. Part No.SY89835UMG-TR
BrandMicrochip
SGD3.321
Each (On a Reel of 1000)
units
3 70 mA 3GHz Surface Mount MLF 8 2 x 2 x 0.8mm 2mm 2mm 0.8mm 2.63 V +85 °C - 2.37 V
RS Stock No. 911-2925
Mfr. Part No.SY89835UMG-TR
BrandMicrochip
SGD5.83
Each (In a Pack of 2)
units
3 70 mA 3GHz Surface Mount MLF 8 2 x 2 x 0.8mm 2mm 2mm 0.8mm 2.63 V +85 °C - 2.37 V
RS Stock No. 194-8991
Mfr. Part No.CY22394FXI
SGD12.863
Each (In a Tube of 96)
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