DSC2311KE1-R0047
Crystal-less™ Configurable Clock Generator
General Description
DSC2311KE1-R0047 is a crystal-less clock generator
that is factory configurable to simultaneously output
two separate frequencies from 2.3 to 170MHz. The
clock generator uses proven silicon MEMS
technology to provide low jitter and high frequency
stability across a wide range of supply voltages and
temperatures. By eliminating the external quartz
crystal, crystal-less clock generators significantly
enhance reliability
and accelerate product
development, while meeting stringent clock
performance criteria for a variety of consumer
electronics, communications, and storage applications.
DSC2311KE1-R0047 has an output enable/disable
feature allowing it to disable the outputs when OE is
low. The device is available in a space-saving 6-pin
2.5mm x 2.0mm TDFN package that needs only a
single external bypass capacitor. This requires a PCB
footprint equivalent to that of a 1.0mm x 1.0mm
crystal-based clock generator.
Features
• Two simultaneous LVCMOS outputs:
- 12MHz
- 25MHz
• Low RMS phase jitter: <1ps (typical)
• ±50ppm frequency stability
• -20°C to +70°C ext. commercial temperature range
• High supply noise rejection: -50dBc
• High shock & vibration immunity
- Qualified to MIL-STD-883
• High reliability
- 20x higher MTBF than crystal-based clock
generator designs
• Programmable output strength for EMI reduction
and signal integrity optimization
• Supply range of 2.25 to 3.6V
• AEC-Q100 automotive qualified
• 6-pin 2.5mm x 2.0mm TDFN package
Applications
• Consumer Electronics
• Camera and Imaging Modules
• Home Automation
• Industrial and Power Conversion
• Mobile Communications, Internet, and Sensor Devices
• Solid State, Hard Drive, and Flash Drive Storage
• Automotive
Block Diagram
Control Circuitry
÷ M1
CLK0
12MHz LVCMOS
MEMS
PLL
÷ M2
OE
CLK1
25MHz LVCMOS
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
May 17, 2016
3906
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or (408) 955-1690
Micrel, Inc.
DSC2311KE1-R0047
Ordering Information
Ordering Part Number
DSC2311KE1-R0047
DSC2311KE1-R0047T
Industrial Temperature Range
-20°C to +70°C
-20°C to +70°C
Shipping
Tube
Tape and Reel
Package
6-pin 2.5mm x 2.0mm TDFN
6-pin 2.5mm x 2.0mm TDFN
Devices are Green and RoHS compliant. Sample material may have only a partial top mark.
Pin Configuration
OE
VDD
DNC
CLK1
GND
CLK0
6-pin 2.5mm x 2.0mm TDFN
Pin Description
Pin Number
1
2
3
4
5
6
Pin Name
OE
DNC
GND
CLK0
CLK1
VDD
PWR
O
O
PWR
LVCMOS
LVCMOS
Pin Type
I
Pin Level
Pin Function
Active high output enable for CLK0 and CLK1
Leave unconnected or connect to the ground
Power supply ground
CLK0 output frequency = 12MHz
CLK1 output frequency = 25MHz
Power supply
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DSC2311KE1-R0047
Specifications
(Unless specified otherwise: T = 25°C, VDD = 3.3V)
Parameter
Supply Voltage¹
Supply Current²
Frequency Stability
6
Aging
Startup Time³
Input Logic High
Input Logic Low
Output Disable Time
4
Output Enable Time
4
Pull-Up Resistor²
Output Logic High
Output Logic Low
Output Transition Time
4
Rise Time
Fall Time
Frequency
Output Duty Cycle
Period Jitter
5
Integrated Phase Noise
VOH
VOL
tR
tF
F0
F1
SYM
JPER
JCC
CLK0 = CLK1 = 25MHz
200kHz to 20MHz @ 25MHz
100kHz to 20MHz @ 25MHz
12kHz to 20MHz @ 25MHz
Symbol
VDD
IDD
F
F
tSU
VIH
VIL
tDA
tEN
Pull-up exists on pin 1
I = ±6mA
0.9 x VDD
-
1.1
1.43
12
25
45
3
0.3
0.38
1.7
55
40
-
0.1 x VDD
2
2
OE pin low - outputs are disabled
Includes frequency variation due to initial
tolerance, temp. and power supply voltage
First year (@ 25°C)
T = 25°C
0.75 x VDD
-
Condition
Min.
2.25
21
±50
±5
5
-
0.25 x VDD
5
20
Typ.
Max.
3.6
23
Units
V
mA
ppm
ppm
ms
V
ns
ns
kOhms
V
20% to 80%
CL = 15pF
CLK0
CLK1
ns
MHz
%
psRMS
psRMS
2
Notes:
1. Pin 4 VDD should be filtered with 0.1uF capacitor.
2. Output is enabled if OE pad is high or not connected. Supply current = Disabled Current +
Consumption graph on next page.
3. tSU is time to stable output frequency after VDD is applied and outputs are enabled.
4. See Figure 3 for detail (all based on maximum drive settings).
5. Period Jitter includes crosstalk from adjacent output.
6. For other ppm stabilities, contact the factory at MEMS_Support@micrel.com.
IDD from CLK0 + IDD from CLK1. See Current
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
VDD + 0.3
+150
+150
+260
4000
400
1500
Units
V
V
°C
°C
°C
40sec max.
Condition
-
V
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DSC2311KE1-R0047
Current Consumption
Figure 1. Total Current = Disabled Current +
IDD Fout1 + IDD Fout2
Solder Reflow Profile
Figure 2. Solder Reflow Profile
6 QFN
Ramp-Up Rate (200°C to Peak Temp)
Preheat Time 150°C to 200°C
Time maintained above 217°C
Peak Temperature
Time within 5°C of actual Peak
Ramp-Down Rate
Time 25°C to Peak Temperature
MSL 1 @ 260°C refer to JSTD-020C
3°C/sec Max.
60 - 180 sec
60 - 150 sec
255 - 260°C
20 - 40 sec
6°C/sec Max.
8 min Max.
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DSC2311KE1-R0047
OE Function and Output Waveform
Output
OE
Figure 3. OE Function and Output Waveform
Package Information
7
6-pin TDFN (2.5mm x 2.0mm)
Note:
7. Package information is correct as of the publication date. For updates and most current information, go to
www.micrel.com.
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.
© 2016 Micrel, Incorporated.
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Analogue and Mixed Signal
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