DSC557-04 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – Crystal-less™ Three Output PCIe Clock Generator

DSC557-04
Crystal-less™ Three Output PCIe Clock Generator
General Description
The DSC557-04 is a Crystal-less™, three
output PCI express clock generator meeting
Gen1, Gen2, and Gen3 specifications. The
clock generator uses proven silicon MEMS
technology to provide excellent jitter and
stability over a wide range of supply
voltages and temperatures. By eliminating
the external quartz crystal, MEMS clock
generators significantly enhance reliability
and accelerate product development, while
meeting stringent clock performance criteria
for a variety of communications, storage,
and networking applications.
DSC557-04 has an Output Enable / Disable
feature allowing it to disable all outputs
when OE1 and OE2 are low. OE1 controls
CLK0 and OE2 controls CLK1/2. CLK1/2 are
synchronous PCIe clocks. See the OE
function diagram for more detail. The
device is available in a 20 pin QFN.
Additional output formats are in any
combination of LVPECL, LVDS, and HCSL.
Features
 Meets PCIe Gen1, Gen2 & Gen3 specs
 Available Output Formats:
o HCSL, LVPECL, or LVDS
o Mixed Outputs: LVPECL/HCSL/LVDS
 Wide Temperature Range
o Ext. Industrial: -40° to 105° C
o Industrial: -40° to 85° C
o Ext. commercial: -20° to 70° C
 Supply Range of 2.25 to 3.6 V
 Low Power Consumption
o 30% lower than competing devices
 Excellent Shock & Vibration Immunity
o Qualified to MIL-STD-883
 Available Footprints:
o 20 QFN
 Lead Free & RoHS Compliant
 Short Lead Time: 2 Weeks
Block Diagram
Applications
Control Circuitry
MEMS
OE1
OE2
PLLs
Output
Control
and
Divider
CLK0+
CLK0-
CLK1+
CLK1-
CLK2-
CLK2+
 Communications/Networking
o Ethernet
o 1G, 10GBASE-T/KR/LR/SR, and FcoE
o Routers and Switches
o Gateways, VoIP, Wireless AP’s
o Passive Optical Networks
 Storage
o SAN, NAS, SSD, JBOD
* Clk0+/-, Clk1+/- and Clk2 +/- are 100 MHz
as per PCIe standards. For other frequencies,
please contact the factory.
 Embedded Applications
o Industrial, Medical, and Avionics
o Security Systems and Office
Automation
o Digital Signage, POS and others
 Consumer Electronics
o Smart TV, Bluray, STB
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DSC557-04
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