The 8T49N4811 is a highly flexible FemtoClock® NG pin-programmable clock generator suitable for networking and communications applications. It is able to generate five different output frequencies with multiple copies of each. A fundamental mode crystal, single-ended, or differential input reference may be used as the source for the output frequency.
The use of pin-programming to select the input source / frequency, desired output frequencies and output styles allow a single device to be used in a wide variety of applications without the need for register programming.
Selection pins use 3-level options to maximize flexibility while minimizing package size. Selection is performed by tying a selection pin high or low or by leaving it floating, eliminating the need for passive components to drive a desired logic level.
Features
Fourth generation FemtoClock® NG technology
Generates multiple copies of 25MHz, 50MHz, 100MHz, 125MHz, 156.25MHz or 312.5MHz
Typical input frequency is 25MHz, with optional 125MHz and 156.25MHz input support
Differential outputs are pin programmable for LVDS or LVPECL
RMS phase jitter at 156.25MHz: <300fs typical
Power Supply Rejection Ratio better than -50dBc from 10k-1.5MHz at 3.3V power supply
Full 3.3V and 2.5V Supply Voltages
-40°C to +85°C ambient operating temperature
56-pin VFQFPN, lead-free (RoHS 6) packaging
Comparison
Applications
Documentation
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.