DSC511-03
Crystal-less Two Output Clock Generator
General Description
The DSC511-03 is a crystal-less, two output
clock generator. 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.
DSC511-03 has a Output Enable / Disable
feature allowing it to disable the outputs
when OE is low. The device is available in a
space saving 6 pin 2.5 x 2.0 mm QFN
package.
Features
Low RMS Phase Jitter: <1 ps (typ)
High Stability: ±10, ±25, ±50 ppm
Wide Temperature Range
o
Automotive: -55° to 125° C
o
Ext. Industrial: -40° to 105° C
o
Industrial: -40° to 85° C
o
Ext. commercial: -20° to 70° C
High Supply Noise Rejection: -50 dBc
Two Independent CMOS Outputs
Wide Freq. Range:
o
CMOS Output: 2.3 to 170 MHz
Miniature Footprint of 2.5 x 2.0 mm
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
Block Diagram
Control Circuitry
Applications
MEMS
PLL
Output
Control
and
Divider
CLK0
OE
CLK1
Consumer Electronics
Solid State Storage
Storage Area Networks
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
Industrial and Medical
_____________________________________________________________________________________________________________________________ _________________
DSC511-03
Page 1
MK-QB-P-D-130103-01-1
DSC511-03
Crystal-less Two Output PCIe Clock Generator
Specifications
(Unless specified otherwise: T=25° C,
VDD =3.3V)
Parameter
Supply Voltage
Supply Current
1
Condition
V
DD
I
DD
I
DD
Δf
Δf
t
SU
V
IH
V
IL
t
DA
t
EN
Pull-up exists on all digital IO
V
OH
V
OL
t
R
t
F
f
0
SYM
J
PER
J
CC
I=±6mA
20% to 80%
C
L
=15pf
Commercial/Industrial temp range
Automotive temp range
F
O1
=F
O2
=125 MHz
200kHz to 20MHz @ 125MHz
100kHz to 20MHz @ 125MHz
12kHz to 20MHz @ 125MHz
EN pin low – outputs are disabled
EN pin high – outputs are enabled
C
L
=15pF, F
O1
=F
O2
=125 MHz
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
1 year @25°C
T=25°C
Min.
2.25
Typ.
21
32
Max.
3.6
23
Unit
V
mA
mA
Supply Current
2
Frequency Stability
Aging
Startup Time
3
Input Logic Levels
Input logic high
Input logic low
Output Disable Time
4
Output Enable Time
Pull-Up Resistor
2
Output Logic Levels
Output logic high
Output logic low
Output Transition time
4
Rise Time
Fall Time
Frequency
Output Duty Cycle
Period Jitter
5
Integrated Phase Noise
Notes:
1.
2.
3.
4.
5.
±10
±25
±50
±5
5
0.75xV
DD
-
-
0.25xV
DD
5
20
40
0.9xV
DD
-
1.1
1.4
2.3
45
3
0.3
0.38
1.7
-
0.1xV
DD
2
2
170
100
55
ppm
ppm
ms
V
ns
ns
kΩ
V
ns
MHz
%
ps
RMS
ps
RMS
2
Pin 4 V
DD
should be filtered with 0.01uf capacitor.
Output is enabled if Enable pad is floated or not connected.
t
su
is time to 100PPM stable output frequency after V
DD
is applied and outputs are enabled.
Output Waveform and Test Circuit figures below define the parameters.
Period Jitter includes crosstalk from adjacent output.
Absolute Maximum Ratings
Item
Supply Voltage
Input Voltage
Junction Temp
Storage Temp
Soldering Temp
ESD
HBM
MM
CDM
Min
-0.3
-0.3
-
-55
-
-
Max
+4.0
V
DD
+0.3
+150
+150
+260
4000
400
1500
Unit
V
V
°C
°C
°C
V
Condition
40sec max.
_____________________________________________________________________________________________________________________________ _________________
DSC511-03
Page 2
MK-QB-P-D-130103-01-1
DSC511-03
Crystal-less Two Output PCIe Clock Generator
Solder Reflow Profile
20-40
Sec
Temperature (°C)
217
°
C
200
°
C
.
ax
3C
/Se
cM
ax
60-150
Sec
260
°
C
.
S
6C/
6C/
6C/
c
c
ec
Ma
Ma
Ma
150
°
C
Se
cM
60-180
Sec
Reflow
.
.
x.
3C
/
Pre heat
8 min max
Cool
Time
25
°
C
6 QFN
MSL 1 @ 260°C refer to JSTD-020C
Ramp-Up Rate (200°C to Peak Temp)
3°C/Sec Max.
Preheat Time 150°C to 200°C
60-180 Sec
Time maintained above 217°C
60-150 Sec
Peak Temperature
255-260°C
Time within 5°C of actual Peak
20-40 Sec
Ramp-Down Rate
6°C/Sec Max.
Time 25°C to Peak Temperature
8 min Max.
OE Function and
Output Waveform: LVCMOS
t
R
V
OH
t
F
Output
V
OL
675 mV
1/f
o
t
DA
V
IH
t
EN
Enable
V
IL
_____________________________________________________________________________________________________________________________ _________________
DSC511-03
Page 3
MK-QB-P-D-130103-01-1
DSC511-03
Crystal-less Two Output PCIe Clock Generator
Ordering
Information
DSC511-03
D I 2 - R0001 T
Package
D: 2520 6pin
Temp Range
E: -20 to 70
I: -40 to 85
L: -40 to 105
M: -55 to 125
Stability
1: ±50ppm
2: ±25ppm
5: ±10ppm
Packing
T: Tape & Reel
: Tube
Frequency
Rxxxx
Output Clock Frequencies
Table 2 lists the standard default frequency configurations and the associated ordering information
to be used in conjunction with the ordering code. Customer defined combinations are available.
Table 2. Pre-programmed output frequency pairs
Ordering Info
R0001
RXXXX
CLK 1
(MHz)
25.0000
-
CLK 2
(MHz)
25.0000
-
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DSC511-03
Page 4
MK-QB-P-D-130103-01-1
DSC511-03
Crystal-less Two Output PCIe Clock Generator
Package Dimensions
EXTERNAL DIMENSIONS
Units: mm [ inches]
2.5±0.05 [0.098±0.002]
0.825 [0.032]
6
5
4
0.6 REF
0.535 REF
0.7 REF
6
1
2
3
0.7±0.1 [0.079±0.002]
3
2
1
0.765±0.1
1
2.0±0.05 [0.079±0.002]
0.65±0.05 [0.026±0.002]
0.25±0.05 [0.099±0.002]
0.65±0.05 [0.026±0.002]
0.25±0.05 [0.099±0.002]
0.85
5
2
4
3
4
5
6
Via to Ground
Plane
0.7±0.1 [0.079±0.002]
Via to
Power Trace
0.375
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
0.85±0.05
No.
1
2
3
4
5
6
Pin Terminal
Enable
N/C
Ground
CLK0
CLK1
VDD
Disclaimer:
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information
is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and
descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted
by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims
any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the
body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or
sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any
damages resulting from such use or sale.
MICREL, Inc.
Phone: +1 (408) 944-0800
●
●
2180 Fortune Drive,
Fax: +1 (408) 474-1000
San Jose, California
95131
● Email: hbwhelp@micrel.com
●
●
USA
www.micrel.com
_____________________________________________________________________________________________________________________________ _________________
DSC511-03
Page 5
MK-QB-P-D-130103-01-1
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