Overview
Description
The 810001I-21 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 most 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 60Hz 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 SMPTE 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 60Hz and 59.94Hz base frame rates in one device
- Supports both 1000/1001 and 1001/1000 rate conversions
- Dual PLL mode for high-frequency clock generation (36MHz to 148.5MHz)
- VCXO-PLL mode for low-frequency clock generation (27MHz and 26.973MHz)
- One LVCMOS/LVTTL clock output
- Two selectable LVCMOS/LVTTL clock inputs
- LVCMOS/LVTTL compatible control signals
- RMS phase jitter at148.3516MHz, (12kHz - 20MHz): 1.089ps (typical)
- 3.3V supply voltage
- -40 °C to 85 °C ambient operating temperature
- Lead-free (RoHS 6) packaging
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 505 KB | |
| End Of Life Notice | PDF 560 KB | |
| Product Change Notice | PDF 596 KB | |
| Product Change Notice | PDF 544 KB | |
| Application Note | PDF 334 KB | |
| Application Note | PDF 222 KB | |
| Application Note | PDF 218 KB | |
| Application Note | PDF 155 KB | |
| Application Note | PDF 829 KB | |
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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.
Processing table
| VFQFPN | 32 | I | Yes | Tray | ||
| VFQFPN | 32 | I | Yes | Reel |
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