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PDF DSC2122 Data sheet ( Hoja de datos )
| Número de pieza | DSC2122 | |
| Descripción | SPI Programmable Dual LVPECL Oscillator | |
| Fabricantes | Discera | |
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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
_____________________________________________________________________________________________________________________________ _________________
DSC2122 DSC2222
Page 1
MK-Q-B-P-D-12050105
1 page  
DSC2122 DSC2222 Low-Jitter I2C/SPI Programmable Dual LVPECL Oscillator
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
2.5
156MHz LVPECL
2.0 212MHz LVPECL
320MHz LVPECL
1.5 410MHz LVPECL
1.0
0.5
Phas e Jitter ( ps RM S)
0.0
0
200 400 600 800 1000
Low-end of integration BW: x kHz to 20 MHz
LVPECL Phase jitter (integrated phase noise)
Output Waveform: LVPECL
tR
Output
Output
80%
50%
20%
tF
1/f o
Enable
VIL
tEN
tDA
VIH
830 mv
_____________________________________________________________________________________________________________________________ _________________
DSC2122 DSC2222
Page 5
MK-Q-B-P-D-1205010 5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DSC2122.PDF ] | |
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