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. 194-9012
Mfr. Part No.CY2305SXC-1
MYR15.08
Each (In a Pack of 2)
units
1 32 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +70 °C 133.33MHz 3 V
RS Stock No. 145-3381
Mfr. Part No.NB3L553DG
MYR6.67
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. 817-5953
Mfr. Part No.CDCLVC1108PW
MYR20.57
Each
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. 194-8999
Mfr. Part No.CY2304NZZXI-1
MYR37.383
Each (In a Tube of 162)
units
1 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 66.66MHz 3 V
RS Stock No. 807-1713
Mfr. Part No.ADCLK944BCPZ-WP
MYR31.74
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. 124-2935
Mfr. Part No.CY2305SXI-1H
MYR49.389
Each (In a Pack of 10)
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. 162-8133
Mfr. Part No.CDCLVC1108PW
MYR18.53
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
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Mfr. Part No.CY2292FXI
MYR64.78
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3 110 (Typ.) mA 30MHz Surface Mount SOIC 16 9.98 x 3.98 x 1.47mm 9.98mm 3.98mm 1.47mm 5.5 V +85 °C 80MHz 4.5 V
RS Stock No. 177-9748
Mfr. Part No.SY54020ARMG
BrandMicrochip
MYR25.265
Each (In a Pack of 2)
units
6 56 mA 3.2GHz Surface Mount MLF 16 3 x 3 x 0.8mm 3mm 3mm 0.8mm 2.62 V +85 °C - 2.37 V
RS Stock No. 124-5344
Mfr. Part No.NB6N14SMNG
MYR29.12
Each (In a Tube of 123)
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. 162-8134
Mfr. Part No.CDCLVC1112PW
MYR23.295
Each (In a Tube of 60)
units
6 10 mA 180 MHz, 250 MHz Surface Mount TSSOP 24 7.9 x 4.5 x 1.05mm 7.9mm 4.5mm 1.05mm 2.7 V, 3.6 V +85 °C 180 MHz, 250 MHz 2.3 V, 3 V
RS Stock No. 194-8994
Mfr. Part No.CY2292FXC
MYR28.86
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. 194-9020
Mfr. Part No.CY2308ZXI-1H
MYR56.35
Each
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1 70 mA 133.3MHz 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. 787-6778
Mfr. Part No.MC100LVEL11DG
MYR18.98
Each
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4 30 mA 1GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +3.8 V +85 °C - ±3 V
RS Stock No. 168-9987
Mfr. Part No.SI53159-A01AGM
MYR13.115
Each (In a Tray of 490)
units
9 60 mA 210MHz Surface Mount QFN 48 6 x 6 x 0.75mm 5mm 6mm 0.75mm 3.465 V +85 °C - 3.135 V
RS Stock No. 194-9026
Mfr. Part No.CY2309SXC-1
MYR30.415
Each (In a Pack of 2)
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. 802-2067
Mfr. Part No.NB7L572MNG
MYR55.83
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2 110 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. 194-9007
Mfr. Part No.CY2305CSXI-1
MYR20.329
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
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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. 163-0041
Mfr. Part No.NB3U1548CDG
MYR19.80
Each (In a Tube of 96)
units
1 5 μA 2GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 50mm 4mm 1.5mm 3.3 V +85 °C 160MHz 1.5 V