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
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. 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. 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. 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
New
RS Stock No. 216-6244
Mfr. Part No.9DB433AGILF
SGD5.247
Each (In a Tube of 50)
units
- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
New
RS Stock No. 217-7814
Mfr. Part No.2305-1DCG
SGD1.187
Each (In a Pack of 10)
units
6 32 mA 133MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9006
Mfr. Part No.CY2304SXI-2
SGD15.11
Each
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 +85 °C 133.3MHz 3 V
New
RS Stock No. 216-6161
Mfr. Part No.574MILF
SGD16.22
Each
units
- 36 mA 160MHz - SOIC-8 8 - - - - - - - -
New
RS Stock No. 216-6248
Mfr. Part No.9DB433AGLF
SGD5.436
Each (In a Pack of 5)
units
- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
New
RS Stock No. 216-6245
Mfr. Part No.9DB433AGILF
SGD6.245
Each (In a Pack of 2)
units
- 170 mA 166MHz - TSSOP-28 28 - - - - - - - -
RS Stock No. 787-6918
Mfr. Part No.NB3L553MNR4G
SGD3.69
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. 802-2067
Mfr. Part No.NB7L572MNG
SGD20.57
Each
units
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. 194-9043
Mfr. Part No.CY23S05SXC-1H
SGD13.234
Each (In a Tube of 97)
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. 126-4892
Mfr. Part No.Si53342-B-GM
SGD3.09
Each (In a Pack of 5)
units
6 80 mA 200MHz Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm 3.63 V +85 °C 1250MHz 2.97 V
New
RS Stock No. 217-7817
Mfr. Part No.2305NZ-1HDCGI
SGD1.608
Each (In a Tube of 97)
units
6 32 mA 133MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 802-1982
Mfr. Part No.NB2304AI2DG
SGD1.856
Each (In a Pack of 10)
units
- 45 mA 133MHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 3.6 V +85 °C 133.3MHz 3 V
RS Stock No. 188-5305
Mfr. Part No.CY22150FZXC
SGD11.716
Each (In a Tube of 96)
units
6 45 mA 133 (Clock)MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.46 V +70 °C 200MHz 3.13 V
New
RS Stock No. 216-6259
Mfr. Part No.9DBL0841BKILF
SGD5.975
Each (In a Pack of 2)
units
- 25 mA 200MHz - VFQFPN 48 - - - - - - - -
New
RS Stock No. 217-7872
Mfr. Part No.5PB1110NDGI
SGD4.506
Each (In a Tray of 100)
units
11 27 mA 200MHz Surface Mount SOIC 20 - - - - - - - -