FemtoClock™ Dual VCXO Video PLL
NOTICE - The following device(s) are recommended alternatives:
Jump to Page Section:
Back to top
Explore ECAD Models
Overview
Description
The 810001-22 is a PLL based synchronous clock generator that is optimized for digital video clock jitter attenuation and frequency translation. The device contains two internal frequency multiplication stages that are cascaded in series. The first stage is a VCXO PLL that is optimized to provide reference clock jitter attenuation, and to support the complex PLL multiplication ratios needed for video rate conversion. The second stage is a FemtoClock™ frequency multiplier that provides the low jitter, high frequency video output clock. Preset multiplication ratios are selected from internal lookup tables using device input selection pins. The multiplication ratios are optimized to support common video rates used in professional video system applications. The VCXO requires the use of an external, inexpensive pullable crystal. Two crystal connections are provided (pin selectable) so that both 60 and 59.94Hz base frame rates can be supported. The VCXO requires external passive loop filter components which are used to set the PLL loop bandwidth and damping characteristics.
Features
- Jitter attenuation and frequency translation of video clock signals
- Supports SMTPE 292M, ITU-R Rec. 601/656 and MPEG-transport clocks
- Support of High-Definition (HD) and Standard-Definition (SD) pixel rates
- Dual VCXO-PLL supports both 60 and 59.94Hz base frame rates in one device
- Dual PLL mode for high-frequency clock generation (32.967MHz to 162MHz)
- VCXO-PLL mode for low-frequency clock generation (27MHz and 26.973MHz)
- One LVCMOS/LVTTL PLL clock output
- Two selectable LVCMOS/LVTTL input clocks
- LVCMOS/LVTTL compatible control signals
- RMS phase jitter @148.5MHz, using a 27MHz crystal (12kHz - 20MHz): 1.01ps (typical)
- 3.3V supply voltage
- 0°C to 70°C ambient operating temperature
- Available in a lead-free (RoHS 6) 32-VFQFN package
Design & Development
Software & Tools
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.
Product Options
Processing table
| VFQFPN | 32 | C | Yes | Tray | ||
| VFQFPN | 32 | C | Yes | Reel |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
play_circle_filledVideos & Training
News & Blog Posts
| Benefits of a Point-of-Use Clock for Jitter Optimization | Blog Post | Apr 27, 2021 |
