SPI Programmable Dual LVPECL Oscillator
DSC2122 DSC2222
Low-Jitter I2C/SPI Programmable Dual LVPECL Oscillator
Datasheet
General Description
The DSC2122 and ...
Description
DSC2122 DSC2222
Low-Jitter I2C/SPI Programmable Dual LVPECL Oscillator
Datasheet
General Description
The DSC2122 and DSC2222 series of programmable, high-performance dual LVPECL oscillators utilizes a proven silicon MEMS technology to provide excellent jitter and stability while incorporating high output frequency flexibility. DSC2122 and DSC2222 allow the user to independently modify the frequency of each output using I2C or SPI interface, respectively. User can also select from two pre-programmed default output frequencies using the control pin.
DSC2122 and DSC2222 are packaged in 14pin 3.2x2.5 mm QFN packages and available in temperature grades from Ext. Commercial to Industrial.
Block Diagram
Features
Low RMS Phase Jitter: <1 ps (typ) High Stability: ±50 ppm Wide Temperature Range o Industrial: -40° to 85° C o Ext. commercial: -20° to 70° C High Supply Noise Rejection: -50 dBc Two Independent LVPECL Outputs I2C/SPI Programmable Frequencies Short Lead Times: 2 Weeks Wide Frequency Range: o LVPECL Output: 2.3 to 460 MHz Miniature Footprint of 3.2x2.5mm Excellent Shock & Vibration Immunity o Qualified to MIL-STD-883 High Reliability o 20x better MTF than quartz oscillators Supply Range of 2.25 to 3.6 V Lead Free & RoHS Compliant
Pin # 3 5 6 7
DSC2122 (I2C) NC SDA SCL
CS_bar
DSC2222 (SPI) SCLK MOSI MISO SS
Applications
Storage Area Networks o SATA, SAS, Fibre Channel Passive Optical Networks o EPON, 10G-EPON, GPON, 10G-PON Ethernet o 1G, 10GBASE-T/KR/LR/SR, and FCoE H...
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