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. 145-6448
Mfr. Part No.CDCLVC1102PW
R 34.634
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. 817-5947
Mfr. Part No.CDCLVC1102PW
R 46.812
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. 787-6778
Mfr. Part No.MC100LVEL11DG
R 74.53
Each
units
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. 162-9379
Mfr. Part No.MC100LVEL11DG
R 63.517
Each (In a Tube of 98)
units
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. 817-5941
Mfr. Part No.CDCLVC1104PW
R 64.136
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. 912-9646
Mfr. Part No.ADCLK914BCPZ-R2
R 211.165
Each (On a Reel of 250)
units
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. 170-3519
Mfr. Part No.NB3N551DG
R 17.891
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. 759-1547
Mfr. Part No.ADCLK914BCPZ-R2
R 240.11
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. 121-9854
Mfr. Part No.NB3N551DR2G
R 12.628
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. 787-6924
Mfr. Part No.NB3N551DG
R 28.345
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. 787-6933
Mfr. Part No.NB3N551DR2G
R 26.066
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. 162-8130
Mfr. Part No.CDCLVC1104PW
R 47.038
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. 817-5957
Mfr. Part No.CDCLVC1112PW
R 106.53
Each
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. 787-6879
Mfr. Part No.NB2305AI1DR2G
R 20.648
Each (In a Pack of 5)
units
1 50 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. 194-9039
Mfr. Part No.CY23EP05SXI-1H
R 222.779
Each (In a Tube of 97)
units
1 30 mA, 45 mA 220MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 220MHz 3 V
RS stock no. 194-9015
Mfr. Part No.CY2308SXI-1H
R 114.915
Each (In a Tube of 48)
units
1 70 mA 133.3MHz Surface Mount SOIC 16 9.98 x 3.98 x 1.47mm 9.98mm 3.98mm 1.47mm 3.6 V +85 °C 133.3MHz 3 V
RS stock no. 169-0097
Mfr. Part No.SI53115-A01AGM
R 49.306
Each (In a Tray of 260)
units
- 110 mA 150MHz Surface Mount QFN 64 9 x 9 x 0.9mm 9mm 9mm 0.9mm 3.465 V +85 °C 133MHz 3.135 V
RS stock no. 194-9035
Mfr. Part No.CY23EP05SXC-1
R 155.906
Each (In a Tube of 97)
units
1 30 mA, 45 mA 220MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +70 °C 220MHz 3 V
RS stock no. 194-9025
Mfr. Part No.CY2309SXC-1
R 101.274
Each (In a Tube of 48)
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. 194-8987
Mfr. Part No.CY22392FXI
R 226.20
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