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. 170-3519
Mfr. Part No.NB3N551DG
MYR6.14
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
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. 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. 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. 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. 188-5313
Mfr. Part No.CY2305SXI-1H
MYR11.022
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
New
RS Stock No. 216-6133
Mfr. Part No.2305-1DCG8
MYR1.805
Each (On a Reel of 3000)
units
- 32 mA 133MHz - SOIC-8 8 - - - - - - - -
RS Stock No. 121-6388
Mfr. Part No.MC100LVEL11DTG
MYR16.006
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
New
RS Stock No. 216-6160
Mfr. Part No.574MILF
MYR39.426
Each (In a Tube of 97)
units
- 36 mA 160MHz - SOIC-8 8 - - - - - - - -
RS Stock No. 194-8988
Mfr. Part No.CY22392FXI
MYR70.56
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
MYR3.527
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
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
RS Stock No. 194-9009
Mfr. Part No.CY2305CSXI-1H
MYR26.401
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
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. 194-9001
Mfr. Part No.CY2304SXC-1
MYR26.93
Each (In a Tube of 97)
units
1 45 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 133.3MHz 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. 124-5340
Mfr. Part No.NB3N551MNR4G
MYR3.962
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. 787-6807
Mfr. Part No.MC100LVEP11DG
MYR29.20
Each
units
4 42 mA 3GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +3.8 V +85 °C - -2.375 V
RS Stock No. 165-4056
Mfr. Part No.SY89835UMG-TR
BrandMicrochip
MYR10.775
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