Overview
Description
The 8T49N012 is a high-performance clock generator with selectable LVPECL or single-ended outputs. The 8T49N012 can generate selectable frequencies from a crystal or a single-ended reference clock. The frequency is selected from the Frequency Selection Table. Excellent phase noise performance is maintained with Renesas’ fourth-generation FemtoClock™ NG PLL technology.
Features
- Fourth-generation FemtoClock NG PLL technology
- Three differential output banks:
Bank A: Selectable between four pairs of LVPECL or four pairs of complementary LVCMOS/LVTTL outputs
Bank B: Two pairs of LVPECL outputs
Bank C: Six pairs of LVPECL outputs - Selectable clock input or crystal input
- Supports 25MHz fundamental crystal or 25MHz, 50MHz, 66.67MHz clock input
- Selectable 156.25MHz, 125MHz, and 100MHz clock for Bank B and Bank C outputs
- Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz, 50MHz, 25MHz, 62.5MHz, or 78.125MHz for Bank A outputs
- PLL lock indication (LVCMOS output)
- RMS phase jitter at 156.25MHz (12kHz to 20MHz): 0.199ps (typical)
- Power supply modes:
Core/Output
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V - -40 °C to 85 °C ambient operating temperature
- 56-lead VFQFN
- Lead-free (RoHS 6) packaging
Comparison
Applications
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 | 56 | I | Yes | Tray | 3 | 20.87 | ||
| VFQFPN | 56 | I | Yes | Reel | 3 |
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