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DSC512-05 Datasheet Preview

DSC512-05 Datasheet

Four Output Clock Generator

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DSC512-05
Crystal-lessFour Output Clock Generator
General Description
The DSC512-05 is a Crystal-less, four
output clock generator that implements
Discera’s proven PureSiliconMEMS
technology. The device provides 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.
DSC512-05 has an Output Enable / Disable
feature allowing it to disable all outputs
when OE1 and OE2 are low. Each output
enable pin controls one of the two banks of
synchronous clocks. See the OE function
table 1 for more detail. The device is
available in a 20 pin QFN. Additional output
formats are in any combination of LVPECL,
LVDS, LVCMOS and HCSL.
Block Diagram*
Features
Two 50MHz (LVDS) Clocks
One 14MHz (LVCMOS) Clock
One 16MHz (LVCMOS) Clock
Available Format on Any Output:
o HCSL, LVPECL, LVDS or LVCMOS
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
AEC-Q100 Automotive Qualified
Applications
Communications/Networking
Embedded and Industrial
Consumer and computation
Medical, Military, Avionics
Storage and enterprise
* In the above block diagram:
Clk0+ is 14MHz LVCMOS (Clk0- is off)
Clk1+/- and Clk2 +/- are 50MHz LVDS;
Clk3 + is 16MHz LVCMOS (Clk3- is off)
For other frequencies, please contact the factor: Sales@discera.com
_____________________________________________________________________________________________________________________________ _________________
DSC512-05
Page 1




Micrel

DSC512-05 Datasheet Preview

DSC512-05 Datasheet

Four Output Clock Generator

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DSC512-05
Crystal-lessFour Output Clock Generator
Specifications (Unless specified otherwise: T=25° C, VDD =3.3V)
Parameter
Supply Voltage1
Supply Current
Supply Current2
(Four HCSL Outputs)
Frequency Stability
Startup Time3
Input Logic Levels
Input logic high
Input logic low
Output Disable Time4
Output Enable Time
Pull-Up Resistor2
Condition
Min.
Typ.
Max. Unit
VDD
2.25
3.6 V
IDD
EN pin low outputs are
disabled
42 46 mA
IDD All outputs running, RL=50 Ω,
Includes frequency variations
Δf due to initial tolerance, temp.
and power supply voltage
tSU T=25°C
120 mA
±100
±50
5
ppm
ms
VIH
0.75xVDD
-V
VIL - 0.25xVDD
tDA 5 ns
tEN 20 ns
Pull-up on OE pin
40 kΩ
Supply Current2
(All LVDS outputs)
Output offset Voltage
Delta Offset Voltage
Pk to Pk Output Swing
Output Transition time3
Rise Time
Fall Time
Frequency
Output Duty Cycle
Period Jitter
Integrated Phase Noise
IDD
VOS
∆VOS
VPP
tR
tF
f0
SYM
JPER
JPH
LVDS Outputs
All outputs running at 156.25MHz,
RL=100Ω
All outputs disabled
RL =100Ω Differential
Single-Ended
20% to 80%
RL=100Ω, CL= 2pF
At any output
Differential
200kHz to 20MHz @156.25MHz
100kHz to 20MHz @156.25MHz
12kHz to 20MHz @156.25MHz
1.125
2.3
48
110
29
350
200
2.5
0.28
0.4
1.7
TBD
TBD
1.4
50
TBD
460
52
2
mA
V
mV
mV
ps
MHz
%
psRMS
psRMS
Notes:
1. Each VDD pin should be filtered with 0.01uf capacitor.
2. Output is enabled if OE pin is floated or not connected.
3. tsu is time to 100PPM stable output frequency after VDD is applied and outputs are enabled.
4. Output Waveform and Connection Diagram define the parameters.
5. Period Jitter includes crosstalk from adjacent output.
6. Contact Sales@Discera.com for alternate output options (LVPECL, LVDS, LVCMOS).
7. Contact Sales@Discera.com for alternative frequency options
_____________________________________________________________________________________________________________________________ _________________
DSC512-05
Page 2


Part Number DSC512-05
Description Four Output Clock Generator
Maker Micrel
Total Page 10 Pages
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