Microchip Technology SM802 & SM806 Ultra-Low Jitter Clock Synthesizers
Microchip Technology SM802 & SM806 Ultra-Low Jitter Clock Synthesizers are members of the ClockWorks® family of devices from Microchip. They provide an extremely low-noise timing solution for applications like (1-100) Gigabit Ethernet, SONET, wireless base station, satellite communication, Fibre Channel, SAS/SATA, and PCIe. The SM802 is based upon a unique PLL architecture that provides less than 250fs phase jitter. The SM806 is a PLL clock generator that achieves ultra-low phase jitter (78fsRMS). With six total outputs and dividers on each output, this device can generate six different frequencies up to 875MHz, from a low-cost quartz crystal or a reference clock input.
Features
- 115fs at 156.25MHz (1.875MHz to 20MHz)
- 265fs at 156.25MHz (12kHz to 20MHz)
- On-Chip Power Supply Regulation for Excellent Board-Level Power Supply Noise Immunity
- Generates up to 8 Combinations of Differential or 16 Single-Ended Clock Outputs
- LVPECL, LVDS, HCSL, LVCMOS (SE or Diff)
- Selectable Input
- Crystal 11.4MHz to 27MHz
- Reference Input 11.4MHz to 80MHz
- No External Crystal Oscillator Capacitors Required
- 2.5V or 3.3V Operating Power Supply
- Available in Industrial Temperature Range
- Available in Green, RoHS, and PFOS Compliant
- QFN Packages
- 44-pin, 7mm × 7mm
- 32-pin, 5mm × 5mm
- 24-pin, 4mm × 4mm
- 16-pin, 3mm × 3.5mm
- Generates up to 6 Differential or Single-Ended Outputs Frequencies up to 875MHz
- <65fs Phase Jitter at 156.25MHz (1.875MHz to 20 MHz)
- 78fs Phase Jitter at 156.25MHz (12kHz to 20MHz)
- On-Chip Power Supply Regulation for Excellent Power Supply Noise Immunity
- High-Performance PLL generator to Generate Multiple Frequencies
- Independently Programmable Output Logic and Frequency
- Output Logic LVPECL, LVDS, HCSL, LVCMOS
- Selectable Input
- Crystal 50MHz to 156.25MHz (31.25MHz to <50MHz with Increased Phase Noise)
- Reference Input 50MHz to 875MHz
- SPI Programmable (See Flex SPI Documentation)
- No External Crystal Oscillator Capacitors Required
- 2.5V or 3.3V Operating Power Supply
- Separate Output Power Supplies
- Each Bank can be at a Different Power Supply Voltage Level (2 Banks of 3 Outputs Each)
- Industrial Temperature Range –40°C to +85°C
- Green, RoHS, and PFOS Compliant VQFN
- Packages
- 48-Pin 7mm x 7mm (6 Differential or Single-Ended Outputs)
- 24-Pin 4mm x 4mm (2 Differential or Single-Ended Outputs)
Applications
- 1/10/40/100 Gigabit Ethernet (GbE)
- SONET/SDH
- PCI Express
- CPRI/OBSAI – Wireless Base Station
- Fibre Channel
- SAS/SATA
- HDMI/HDTV-4K
- DIMM (DDR2-3-4/AMB)
Published: 2021-05-10
| Updated: 2022-03-11