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DSC1103 | DSC1123 Page 1 MK-Q-B-P-D-110410-03-6
Low-Jitter Precision LVDS Oscillator
DSC1103
DSC1123
General Description
The DSC1103 & DSC1123 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.
DSC1103 has a standby feature allowing it to
completely power-down when EN pin is
pulled low; whereas for DSC1123, 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
6-pin LVDS quartz crystal oscillators.
Block Diagram
Output Enable Modes
EN Pin
DSC1103
DSC1123
High
Outputs Active
Outputs Active
NC
Outputs Active
Outputs Active
Low
Standby
Outputs Disabled
Features
Low RMS Phase Jitter: <1 ps (typ)
High Stability: ±10, ±25, ±50 ppm
Wide Temperature Range
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 460 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
LVPECL & HCSL Versions Available
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: Gen 1 & Gen 2
DisplayPort
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DSC1103 | DSC1123 Page 2 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
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
Notes:
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 – outputs are disabled
DSC1103
DSC1123
20
0.095
22
mA
Frequency Stability
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
DSC1103
DSC1123
5
20
ms
ns
Enable Pull-Up Resistor4
Pull-up resistor exist
40
kΩ
LVDS Outputs
Supply Current
IDD
Output Enabled, RL=100Ω
29
32
mA
Output offset Voltage
VOS
R=100Ω Differential
1.125
1.4
V
Delta Offset Voltage
∆VOS
50
mV
Pk to Pk Output Swing
VPP
Single-Ended
350
mV
Output Transition time3
Rise Time
Fall Time
tR
tF
20% to 80%
RL=50Ω, CL= 2pF
200
ps
Frequency
f0
Single Frequency
2.3
460
MHz
Output Duty Cycle
SYM
Differential
48
52
%
Period Jitter
JPER
2.5
psRMS
Integrated Phase Noise
JPH
200kHz to 20MHz @156.25MHz
100kHz to 20MHz @156.25MHz
12kHz to 20MHz @156.25MHz
0.28
0.4
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
3
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
Stability
1: ±50ppm
2: ±25ppm
5: ±10ppm
T
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DSC1103 | DSC1123 Page 3 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
Power supply rejection ratio
Phase jitter (integrated phase noise)
Output Waveform
Typical Termination Scheme
-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
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
156MHz-LVDS
212MHz-LVDS
320MHz-LVDS
410MHz-LVDS
VIL
1/fo
Output
Enable
tDA
tEN
tF
tR
VIH
80%
20%
50%
Output
830 mv
VDD
0.1uF
100 Ω100 Ω
2
3 4
5
6
350 mV
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DSC1103 | DSC1123 Page 4 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
Test Circuit
Solder Reflow Profile
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.
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DSC1103 | DSC1123 Page 5 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
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]
123
4
5
2.54[0.100]
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 OUT-
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]
PAD TIE TO GND
5.0 x 3.2 mm Plastic Package
12 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
1 2 3
45
1.27[0.05]
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 OUT-
6 VDD
OUT
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
0.64±0.05
______________________________________________________________________________________________________________________________________________
DSC1103 | DSC1123 Page 6 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
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
0.5 [0.197]
0.9 [0.035]
1 [ 0.039]
0.9 [0.035] REF
1 2 3
45
0.375
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 OUT-
6 VDD
OUT
6
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
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
0.25±0.05 [0.099±0.002]
0.65±0.05 [0.026±0.002]
0.85
0.7 REF
1 2 3
456
0.375
Via to
Power Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 OUT-
6 VDD
OUT
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
______________________________________________________________________________________________________________________________________________
DSC1103 | DSC1123 Page 7 MK-Q-B-P-D-110410-03-6
DSC1103
Low-Jitter Precision LVDS Oscillator
DSC1123
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]
123
4
5
2.54[0.100]
Via to Power
Trace
Via to Ground
Plane
No. Pin Terminal
1 Enable
2 N/C
3 Ground
4
5 OUT-
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]
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:
DSC1103AI2-100.0000 DSC1103AI5-125.0000 DSC1103AI5-156.2500 DSC1103BE1-075.0000T DSC1103CE1-
200.0000 DSC1103BI2-100.0000 DSC1123CI1-156.2500 DSC1123CI2-150.0000T DSC1123DI2-155.5200T
DSC1123DI2-200.0000T DSC1123DI2-156.2500T DSC1123DI2-212.5000T DSC1123AI1-120.0000 DSC1123AI1-
120.0000T DSC1123CE1-156.2500 DSC1123CE1-200.0000T DSC1103AI2-100.0000T DSC1103BI1-120.0000
DSC1103CI1-200.0000 DSC1123CI2-148.5000T DSC1123CI2-156.2500T DSC1123AE2-200.0000 DSC1123AE2-
125.0000 DSC1123BI5-148.3516 DSC1123DI2-100.0000 DSC1123AI1-150.0000 DSC1123DI2-100.0000T
DSC1123AI2-120.0000 DSC1123CI2-156.2500 DSC1123BI2-125.0000 DSC1123CE1-050.0000 DSC1123AI1-
150.0000T DSC1123AI2-148.5000 DSC1123CI2-150.0000 DSC1103BE1-075.0000 DSC1103CE1-156.2500
DSC1123AI1-200.0000 DSC1123AI2-100.0000 DSC1123BI5-034.0000 DSC1123CI2-100.0000 DSC1123BL1-
125.0000T DSC1103CI1-200.0000T DSC1103CI2-100.0000 DSC1123AE1-125.0000T DSC1123AE1-156.2500T
DSC1123AI2-148.5000T DSC1123AE2-200.0000T DSC1123AI2-090.0000 DSC1123DI5-200.0000 DSC1123AI2-
212.5000T DSC1123BI2-068.0000 DSC1123BI2-100.0000 DSC1103BI2-125.0000 DSC1103CE1-212.5000
DSC1123AE2-050.0000 DSC1123AE2-300.0000 DSC1123AI1-100.0000 DSC1123AE2-100.0000 DSC1123AI2-
100.0000T DSC1123AE1-150.0000T DSC1123AI2-150.0000 DSC1123BL2-200.0000 DSC1123CE1-156.2500T
DSC1123CI2-050.0000 DSC1123BI2-100.0000T DSC1123CI5-125.0000 DSC1123AI2-250.0000T DSC1123BI2-
025.0000T DSC1123BI2-125.0000T DSC1103CE5-100.0000T DSC1123CI2-100.0000T DSC1123CI5-233.2090
DSC1103AI2-200.0000 DSC1103CI5-100.0000 DSC1103AE1-100.0000T DSC1123BI2-034.0000 DSC1123BI5-
148.3516T DSC1123CI2-125.0000 DSC1123CI2-125.0000T DSC1123CI2-200.0000 DSC1123CI2-200.0000T
DSC1123BI2-212.5000T DSC1123AI2-200.0000 DSC1123AI2-200.0000T DSC1123BI1-100.0000 DSC1123BI1-
100.0000T DSC1123BI2-068.0000T DSC1123AI2-125.0000 DSC1103CI5-125.0000T DSC1103BI1-074.2129
DSC1103CI5-106.2500 DSC1123AI1-125.0000 DSC1123AI2-125.0000T DSC1123AI2-155.5200T DSC1123AI1-
100.0000T DSC1123AI2-156.2500T DSC1123BI2-034.0000T DSC1123BL2-125.0000T DSC1123CI1-200.0000
DSC1123CI2-025.0000
