Universal Clock - High Frequency LVCMOS Clock Synthesizer


The XR81101 is a family of Universal Clock synthesizer devices in TSSOP-8 packages. The devices generate ANY frequency in the range of 10MHz to 200MHz by utilizing a highly flexible delta sigma modulator anda wide ranging VCO. The LVCMOS output has very low phase noise jitter of sub 150fs, while consuming extremely low power. These devices can be used with standard crystals or external system clock to support a wide variety of applications. These family of products have extremely low power PLL block with core power consumption of less 40% of the equivalent devices from competition. By second sourcing several of the existing sockets, these devices provides a very compelling power efficiency value benefit across all market segments.

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  • One LVCMOS output
  • Crystal oscillator interface which can also be overdriven using a single-ended reference clock
  • Output frequency: 125MHz
  • Crystal/input frequency: 25MHz, parallel resonant crystal
  • RMS phase jitter @ 125MHz, 1.875MHz - 20MHz: < 150fs
  • Full 3.3V or 2.5V operating supply
  • -40°C to 85°C ambient operating temperature
  • Lead-free (RoHS 6) package


  • Gigabit Ethernet
  • Low-jitter Clock Generation
  • Synchronized clock systems

Design Tools


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MO-153
  • MSL Pb-Free:
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Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR81101-AA02-F TSSOP8 -40 85 OBS
XR81101-AA02TR-F TSSOP8 -40 85 OBS
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
07/12/2017 Product Discontinuation Notice PDN_17-0626-01-1033.pdf
07/11/2017 Product Discontinuation Notification Product Discontinuation Notice 17-0623-02 r-1033.pdf
02/15/2017 Qualification of alternate assembly subcon, ANST. PCN 16-1149-02 ANST-1033.pdf

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