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
Brandonsemi
$2.394
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
Brandonsemi
$1.614
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
Brandonsemi
$2.875
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
Brandonsemi
$2.858
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. 817-5941
Mfr. Part No.CDCLVC1104PW
$6.488
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. 759-1566
Mfr. Part No.ADF4113HVBRUZ
$9.56
Each
units
5 30 mA 4GHz Surface Mount TSSOP 16 5.1 x 4.5 x 1.2mm 5.1mm 4.5mm 1.2mm 5.5 V +85 °C - 2.7 V
RS Stock No. 162-8130
Mfr. Part No.CDCLVC1104PW
$4.788
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. 787-6914
Mfr. Part No.NB3L553DG
Brandonsemi
$3.54
Each (In a Pack of 2)
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
New
RS Stock No. 217-7873
Mfr. Part No.5PB1110NDGI
$6.90
Each (In a Pack of 2)
units
11 27 mA 200MHz Surface Mount SOIC 20 - - - - - - - -
RS Stock No. 194-8996
Mfr. Part No.CY2292FXI
$24.00
Each
units
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. 194-8987
Mfr. Part No.CY22392FXI
$24.045
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. 216-6252
Mfr. Part No.9DB833AGILF
$8.39
Each (In a Pack of 2)
units
- 170 mA 166MHz - TSSOP-48 48 - - - - - - - -
RS Stock No. 177-9646
Mfr. Part No.PL123-02NGI
BrandMicrochip
$3.526
Each (In a Bag of 20)
units
3 0.8 mA 200MHz Surface Mount DFN 6 1.35 x 2.05 x 0.55mm 1.35mm 2.05mm 0.55mm 4.6 V +85 °C - -0.5 V
RS Stock No. 194-8993
Mfr. Part No.CY2292FXC
$12.316
Each (In a Tube of 48)
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. 787-6879
Mfr. Part No.NB2305AI1DR2G
Brandonsemi
$1.97
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. 145-4073
Mfr. Part No.NB2305AI1DR2G
Brandonsemi
$0.812
Each (On a Reel of 2500)
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
New
RS Stock No. 217-7834
Mfr. Part No.511MILF
$4.826
Each (In a Pack of 5)
units
1 8 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 177-9796
Mfr. Part No.PL123-02NGI
BrandMicrochip
$4.13
Each (In a Pack of 5)
units
3 0.8 mA 200MHz Surface Mount DFN 6 1.35 x 2.05 x 0.55mm 1.35mm 2.05mm 0.55mm 4.6 V +85 °C - -0.5 V
New
RS Stock No. 217-7831
Mfr. Part No.501MLFT
$1.259
Each (On a Reel of 3000)
units
1 20 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
RS Stock No. 194-9041
Mfr. Part No.CY23EP09ZXI-1H
$22.68
Each (In a Tube of 96)
units
1 30 mA, 45 mA 220MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 220MHz 3 V