DSC2122 Datasheet, PDF (1/6 Pages) Micrel Semiconductor – Low-Jitter I2C/SPI Programmable Dual LVPECL Oscillator

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 14-
pin 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
HD/SD/SDI Video & Surveillance
PCI Express
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DSC2122 DSC2222
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MK-Q-B-P-D-12050105