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DSC1101 | DSC1121 Page 1 MK-Q-B-P-D-110410-01-6
Low-Jitter Precision CMOS Oscillator
DSC1101
DSC1121
General Description
The DSC1101 & DSC1121 series of high
performance oscillators utilizes a proven
silicon MEMS technology to provide excellent
jitter and stability over a wide range of
supply voltages and temperatures. By
eliminating the need for quartz or SAW
technology, MEMS oscillators significantly
enhance reliability and accelerate product
development, while meeting stringent clock
performance criteria for a variety of
communications, storage, and networking
applications.
DSC1101 has a standby feature allowing it to
completely power-down when EN pin is
pulled low; whereas for DSC1121, only the
outputs are disabled when EN is low. Both
oscillators are available in industry standard
packages, including the small 3.2x2.5 mm2,
and are “drop-in” replacements for standard
4-pin CMOS quartz crystal oscillators.
Block Diagram
Output Enable Modes
EN Pin
DSC1101
DSC1121
High
Output Active
Output Active
NC
Output Active
Output Active
Low
Standby
Output Disabled
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
Short Lead Time: 2 Weeks
Wide Freq. Range: 2.3 to 170 MHz
Small Industry Standard Footprints
o 2.5x2.0, 3.2x2.5, 5.0x3.2, & 7.0x5.0 mm
Excellent Shock & Vibration Immunity
o Qualified to MIL-STD-883
High Reliability
o 20x better MTF than quartz oscillators
Low Current Consumption
Supply Range of 2.25 to 3.6 V
Standby & Output Enable Function
Lead Free & RoHS Compliant
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
DisplayPort
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DSC1101 | DSC1121 Page 2 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
Absolute Maximum Ratings
Item
Min
Max
Unit
Condition
Supply Voltage
-0.3
+4.0
V
Input Voltage
-0.3
VDD+0.3
V
Junction Temp
-
+150
°C
Storage Temp
-55
+150
°C
Soldering Temp
-
+260
°C
40sec max.
ESD
HBM
MM
CDM
-
4000
400
1500
V
Ordering Code
Note: 1000+ years of data retention on internal memory
Specifications
1. Pin 6 VDD should be filtered with 0.1uf capacitor.
2. tsu is time to 100PPM of output frequency after VDD is applied and outputs are enabled.
3. Output Waveform and Test Circuit figures below define the parameters.
4. Output is enabled if pad is floated or not connected.
Parameter
Condition
Min.
Typ.
Max.
Unit
Supply Voltage1
VDD
2.25
3.6
V
Supply Current
IDD
EN pin low – output is disabled
DSC1101
DSC1121
20
0.095
22
mA
Frequency Stability
Ext Comm. & Ind. only
All temp ranges
All temp ranges
Δf
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
±10
±25
±50
ppm
Aging
Δf
1 year @25°C
±5
ppm
Startup Time2
tSU
T=25°C
5
ms
Input Logic Levels
Input logic high
Input logic low
VIH
VIL
0.75xVDD
-
-
0.25xVDD
V
Output Disable Time3
tDA
5
ns
Output Enable Time
tEN
DSC1101
DSC1121
5
20
ms
ns
Enable Pull-Up Resistor4
Pull-up resistor exist
40
kΩ
CMOS Output
Supply Current4
IDD
output is enabled
CL=15pF, F0=125 MHz
31
35
mA
Output Logic Levels
Output logic high
Output logic low
VOH
VOL
I=±6mA
0.9xVDD
-
-
0.1xVDD
V
Output Transition time3
Rise Time
Fall Time
tR
tF
20% to 80%
CL=15pF
1.1
1.3
2
2
ns
Frequency
f0
All temp range except Auto
Auto temp range
2.3
170
100
MHz
Output Duty Cycle
SYM
45
55
%
Period Jitter
JPER
Fout=125MHz
3
psRMS
Integrated Phase Noise
JPH
200kHz to 20MHz @ 125MHz
100kHz to 20MHz @ 125MHz
12kHz to 20MHz @ 125MHz
0.3
0.38
1.7
2
psRMS
DSC11
125.0000
Freq (MHz)
125.0000
0
Enable Modes
0: Enable/Standby
2: Enable/Disable
-
Packing
T: Tape & Reel
: Tube
1
C
I
5
Package
A: 7.0x5.0mm
B: 5.0x3.2mm
C: 3.2x2.5mm
D: 2.5x2.0mm
N: 7.0x5.0mm (no center pad)
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
T
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DSC1101 | DSC1121 Page 3 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
Phase jitter (integrated phase noise)
Power supply rejection ratio
Output Waveform
Typical Termination Scheme
0.0
0.5
1.0
1.5
2.0
2.5
0200 400 600 800 1000
Phase Jitter (ps RMS)
Low-end of integration BW: x kHz to 20 MHz
25MHz-CMOS
50MHz-CMOS
106MHz-CMOS
125MHz-CMOS
-80
-70
-60
-50
-40
-30
-20
-10
0
0.1 1 10 100 1000 10000
Rejection (dBc)
Supply Noise Frequency (kHz)
50-mV
100-mV
VDD
0.1uF
2
3 4
5
6
CLCMOS load
capacitance
VOH
VOL
VIL
1/fo
Output
Enable
tDA
tEN
tF
tR
VIH
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DSC1101 | DSC1121 Page 4 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
Test Circuit
Board Layout (recommended)
Solder Reflow Profile
0.1uF
VDD 15pF
IDD
VDA
4
1 2
3
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.
60-150
Sec
20-40
Sec
60-180
Sec
8 min max
Pre heat
Reflow
Cool
Time
Temperature (°C)
3C/Sec Max.
6C/Sec Max.
200°C
217°C
150°C
25°C
260°C
3C/Sec Max.
60-150
Sec
20-40
Sec
60-180
Sec
8 min max
Pre heat
Reflow
Cool
Time
Temperature (°C)
3C/Sec Max.
6C/Sec Max.
200°C
217°C
150°C
25°C
260°C
60-150
Sec
20-40
Sec
60-180
Sec
8 min max
Pre heat
Reflow
Cool
Time
Temperature (°C)
3C/Sec Max.
6C/Sec Max.
200°C
217°C
150°C
25°C
260°C
3C/Sec Max.
2
3
4
5
6
1
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DSC1101 | DSC1121 Page 5 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
Package Dimensions
7.0 x 5.0 mm Plastic Package
1 2 3
46 5
7±0.10 [0.276±0.004]
5±0.10 [0.197±0.004]
123
465
1.1±0.01[0.43±0.004]
3.7 [0.146] REF
0.85±0.05
1.4 [0.055] 2.6 [0.102]
13
4
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 N/C
6 VDD
OUT
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
2.54 [0.100]
1.4±0.10 [0.055±0.004]
1.8 [0.071]
2.8 [0.110]
1.4 [0.055]
5.08 [0.100]
PAD TIE TO GND
5.0 x 3.2 mm Plastic Package
1 2 3
4
65
5±0.05 [0.197±0.002]
3.2±0.05 [0.126±0.002]
12
3
4 65
1.27 [0.050]
0.7±0.1 [0.079±0.002]
1.2 [0.047] REF
0.85±0.05
0.64 [0.025]
1.1 [ 0.043]
1.2 [0.047] REF
13
4
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5
6 VDD
OUT
N/C
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
0.64±0.05
2.54 [0.100]
______________________________________________________________________________________________________________________________________________
DSC1101 | DSC1121 Page 6 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
3.2 x 2.5 mm Plastic Package
1 2 3
46 5
3.2±0.05 [0.126±0.002]
2.5±0.05 [0.098±0.002]
12
3
4 65
0.5±0.05 [0.198±0.002]
0.9±0.05 [0.035±0.002]
1.05 [0.041]
0.7±0.1 [0.079±0.002]
0.1[0.004] REF
0.9 [0.035] REF
0.85±0.05
0.9 [0.035]
1 [ 0.039]
0.9 [0.035] REF
13
4
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 N/C
6 VDD
OUT
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
2.1[0.083]
2.5 x 2.0 mm Plastic Package
123
46 5
2.5±0.05 [0.098±0.002]
2.0±0.05 [0.079±0.002]
12
3
4 65
0.25±0.05 [0.099±0.002]0.65±0.05 [0.026±0.002]
0.825 [0.032]
0.7±0.1 [0.079±0.002]
0.765±0.1
0.535 REF
0.6 REF
0.7±0.1 [0.079±0.002]
0.85±0.05
0.65±0.05 [0.026±0.002]
0.85
0.7 REF
1 2 3
456
Via to
Power Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 N/C
6 VDD
OUT
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
1.65[0.064]
______________________________________________________________________________________________________________________________________________
DSC1101 | DSC1121 Page 7 MK-Q-B-P-D-110410-01-6
DSC1101
Low-Jitter Precision CMOS Oscillator
DSC1121
7.0 x 5.0 mm Plastic Package (no center pad)
1 2 3
46 5
7±0.10 [0.276±0.004]
5±0.10 [0.197±0.004]
123
465
1.1±0.01[0.43±0.004]
3.7 [0.146] REF
0.85±0.05
1.4 [0.055] 2.6 [0.102]
13
4
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 N/C
6 VDD
OUT
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
2.54 [0.100]
1.4±0.10 [0.055±0.004]
1.4 [0.055]
5.08 [0.100]
Disclaimer:
Discera makes no warranty of any kind, express or implied, with regard to this material,
including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. Discera reserves the right to make changes without further notice to
materials described herein. Discera does not assume any liability arising from the
application or use of any product or circuit described herein. Discera does not authorize its
products for use a critical components in life-support systems where a malfunction or
failure may reasonably be expected to result in significant injury to the user. The inclusion
of Discera’s product in a life-support systems application implies that the manufacturer
assumes all risk of such use and in doing so indemnifies Discera against all charges.
DISCERA, Inc. ● 1961 Concourse Drive San Jose, California 95131 ● USA
Phone: +1 (408) 432-8600 ● Fax: +1 (408) 432-8609 ● Email: sales@discera.com ● www.discera.com
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Micrel:
DSC1121CM1-010.7000T DSC1121CI2-020.0000T DSC1121CI2-125.0000T DSC1101CI5-048.0000 DSC1121CI2-
060.0000T DSC1121CI2-074.2500T DSC1121CI5-040.0000 DSC1121CI5-050.0000T DSC1121DL2-032.0000
DSC1121CI2-024.0000T DSC1121CI2-040.0000 DSC1101BE2-025.0000 DSC1121CI2-062.5000 DSC1121CI2-
150.0000 DSC1121CI2-150.0000T DSC1121CM1-025.0000T DSC1101DI5-026.0000T DSC1121AI2-029.4912T
DSC1121BI1-026.0000 DSC1121CE1-016.0000 DSC1121CE2-066.6600T DSC1121AE1-040.0000T DSC1121AI5-
125.0032 DSC1121AI5-125.0032T DSC1121AM1-025.0000T DSC1121CI2-025.0000 DSC1121CI2-025.0012T
DSC1121CM2-027.0000 DSC1121AE2-156.2500 DSC1121AM1-033.0000 DSC1121AM1-050.0000T DSC1121BI2-
156.2539T DSC1121AE1-024.5760T DSC1121DI2-010.0000T DSC1121DI2-065.5360T DSC1121CI2-024.5760T
DSC1121BL1-125.0000 DSC1121CE2-066.6600 DSC1121CI1-125.0000T DSC1121BI2-120.0000T DSC1121CE2-
025.0000T DSC1121CI2-012.2880 DSC1121CI2-013.0000T DSC1121CI2-066.0000 DSC1121CL2-027.0000
DSC1121AE2-125.0000T DSC1121AI1-155.5200T DSC1121AI2-050.0000T DSC1121AI5-050.0000 DSC1121BI2-
010.0000T DSC1121BI2-025.0000T DSC1121AE1-125.0000T DSC1121AE1-016.0000T DSC1121BI2-100.0000
DSC1121BI5-150.0000 DSC1121BM2-120.0000 DSC1121AE2-025.0000T DSC1101AE1-050.0000 DSC1101CL2-
010.0000 DSC1101CM2-062.2080 DSC1101DM2-125.0000 DSC1121AE1-025.0000T DSC1121AE1-075.0000
DSC1121AE1-075.0000T DSC1121AE2-075.0000T DSC1121AI1-025.0000 DSC1121CL2-027.0000T DSC1121DL1-
016.0000T DSC1121DL2-127.0000T DSC1121AI2-003.6864T DSC1121AI2-025.0000T DSC1121AI2-125.0000T
DSC1121AI2-131.0750T DSC1101CI5-020.0000T DSC1101DI5-066.0000T DSC1121CI5-014.7456T DSC1121CL2-
040.0000 DSC1121DI2-125.0000T DSC1101CI2-066.0000 DSC1101CI5-024.7500 DSC1101DI5-060.0000T
DSC1121CE1-075.0000T DSC1121CE2-026.0000T DSC1121CI2-012.2880T DSC1121CI2-050.0000 DSC1121CI2-
050.0000T DSC1121CI2-133.0000 DSC1121CI2-025.0000T DSC1121CL2-040.0000T DSC1121CM1-048.0000T
DSC1121CM1-125.0000T DSC1121DL2-024.7500 DSC1121BI2-150.0000T DSC1121BI2-125.0037T DSC1121BI2-
200.0000T DSC1121BI5-012.6500 DSC1121BM1-060.0000T DSC1121CE1-025.0012T DSC1121CE2-025.0000
DSC1121CM1-016.0000T
