Micrel DSC1121BE2 Low-jitter precision cmos oscillator Datasheet

DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
Features
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.
 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
Block Diagram
 Supply Range of 2.25 to 3.6 V
 Standby & Output Enable Function
 Lead Free & RoHS Compliant
Applications
Output Enable Modes
EN Pin
High
NC
Low
DSC1101
Output Active
Output Active
Standby
DSC1121
Output Active
Output Active
Output Disabled
 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
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 1
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
Absolute Maximum Ratings
Ordering Code
Item
Min
Max
Unit
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
ESD
HBM
MM
CDM
-
Condition
Enable Modes
0: Enable/Standby
2: Enable/Disable
DSC11 0 1 C I 5
40sec max.
V
Temp Range
E: -20 to 70
I: -40 to 85
L: -40 to 105
M: -55 to 125
-
Package
A: 7.0x5.0mm
B: 5.0x3.2mm
C: 3.2x2.5mm
D: 2.5x2.0mm
N: 7.0x5.0mm (no center pad)
4000
400
1500
Packing
T: Tape & Reel
: Tube
125.0000
Stability
1: ±50ppm
2: ±25ppm
5: ±10ppm
T
Freq (MHz)
125.0000
Note: 1000+ years of data retention on internal memory
Specifications
Parameter
Condition
Supply Voltage1
VDD
Supply Current
IDD
EN pin low – output is disabled
DSC1101
DSC1121
Δf
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
Δf
tSU
1 year @25°C
T=25°C
Frequency Stability
Ext Comm. & Ind. only
All temp ranges
All temp ranges
Aging
Startup Time2
Input Logic Levels
Input logic high
Input logic low
VIH
VIL
Output Disable Time3
tDA
Output Enable Time
tEN
Enable Pull-Up Resistor4
Min.
Typ.
2.25
20
Max.
Unit
3.6
V
0.095
22
mA
±10
±25
±50
±5
5
0.75xVDD
-
0.25xVDD
DSC1101
DSC1121
Pull-up resistor exist
ppm
ppm
ms
V
5
ns
5
20
ms
ns
40
kΩ
CMOS Output
Supply Current4
Output Logic Levels
Output logic high
Output logic low
Output Transition time3
Rise Time
Fall Time
Frequency
Output Duty Cycle
IDD
VOH
VOL
tR
tF
f0
I=±6mA
JPER
Integrated Phase Noise
JPH
31
0.9xVDD
-
20% to 80%
CL=15pF
All temp range except Auto
Auto temp range
SYM
Period Jitter
1.
2.
3.
4.
output is enabled
CL=15pF, F0=125 MHz
1.1
1.3
2.3
45
35
mA
0.1xVDD
V
2
2
170
100
ns
55
Fout=125MHz
3
200kHz to 20MHz @ 125MHz
100kHz to 20MHz @ 125MHz
12kHz to 20MHz @ 125MHz
0.3
0.38
1.7
MHz
%
psRMS
2
psRMS
Pin 6 VDD should be filtered with 0.1uf capacitor.
tsu is time to 100PPM of output frequency after VDD is applied and outputs are enabled.
Output Waveform and Test Circuit figures below define the parameters.
Output is enabled if pad is floated or not connected.
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 2
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
0
2.5
Rejection (dBc)
25MHz-CMOS
Phase Jitter (ps RMS)
50-mV
-10
50MHz-CMOS
2.0
106MHz-CMOS
1.5
125MHz-CMOS
1.0
100-mV
-20
-30
-40
-50
-60
-70
0.5
-80
0.1
0.0
0
200
400
600
800
1
10
100
1000
10000
Supply Noise Frequency (kHz)
1000
Power supply rejection ratio
Low-end of integration BW: x kHz to 20 MHz
Phase jitter (integrated phase noise)
Output Waveform
tR
tF
VOH
Output
VOL
tEN
1/fo
tDA
VIH
Enable
VIL
Typical Termination Scheme
VDD
0.1uF
6
2
5
3
4
CL CMOS load
capacitance
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 3
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
Test Circuit
IDD
VDD
0.1uF
4
6
5
3
4
1
1
2
2
3
15pF
VDA
Board Layout (recommended)
Solder Reflow Profile
20-40
Sec
Se
ax
cM
3C
/
Se
150°C
25°C
60-180
Sec
Pre heat
8 min max
60-150
Sec
Reflow
x.
Ma
ec
.
3C
/
217°C
200°C
S
6C/
Temperature (°C)
cM
ax
.
260°C
Cool
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
255-260°C
Peak Temperature
Time within 5°C of actual Peak
20-40 Sec
6°C/Sec Max.
Ramp-Down Rate
Time 25°C to Peak Temperature
8 min Max.
Time
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 4
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
Package Dimensions
7.0 x 5.0 mm Plastic Package
EXTERNAL DIMENSIONS
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
Units: mm [ inches]
Via to Ground
Plane
1.4±0.10 [0.055±0.004]
2.54 [0.100]
5
6
1
2
3
3
2
2.8 [0.110]
5±0.10 [0.197±0.004]
0.85±0.05
Pin Terminal
Enable
N/C
Ground
OUT
N/C
VDD
TIE TO GND
PAD
3
1
1
No.
1
2
3
4
5
6
4
6
2.6 [0.102]
1.8 [0.071]
3.7 [0.146] REF
4
5.08 [0.100]
1.4 [0.055]
5
4
1.1±0.01[0.43±0.004]
7±0.10 [0.276±0.004]
6
Via to Power
Trace
1.4 [0.055]
5.0 x 3.2 mm Plastic Package
EXTERNAL DIMENSIONS
Units: mm [ inches]
4
4
5
6
1.2 [0.047] REF
5
1
2
3
Via to Power
Trace
0.64±0.05
1.27 [0.050]
5±0.05 [0.197±0.002]
6
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
Via to Ground
Plane
6
4
1
3
1.2 [0.047] REF
3
2
1
0.7±0.1 [0.079±0.002]
3.2±0.05 [0.126±0.002]
0.85±0.05
2.54 [0.100]
No.
1
2
3
4
5
Pin Terminal
Enable
N/C
Ground
OUT
N/C
6
VDD
1.1 [ 0.043]
0.64 [0.025]
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 5
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
3.2 x 2.5 mm Plastic Package
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
Via to Power
Trace
3.2±0.05 [0.126±0.002]
1.05 [0.041]
0.7±0.1 [0.079±0.002]
6
5
4
4
5
2.1[0.083]
Via to Ground
Plane
6
0.9 [0.035] REF
0.9 [0.035] REF
6
4
1
3
1 [ 0.039]
1
2
3
3
2.5±0.05 [0.098±0.002]
2
1
0.1[0.004] REF
0.9±0.05 [0.035±0.002]
0.9 [0.035]
0.5±0.05 [0.198±0.002]
No.
1
2
3
4
5
6
0.85±0.05
Pin Terminal
Enable
N/C
Ground
OUT
N/C
VDD
2.5 x 2.0 mm Plastic Package
EXTERNAL DIMENSIONS
Units: mm [ inches]
2.5±0.05 [0.098±0.002]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
0.7±0.1 [0.079±0.002]
0.825 [0.032]
6
5
4
4
5
Via to
Power Trace
6
1.65[0.064]
Via to Ground
Plane
0.6 REF
0.535 REF
0.7 REF
1
2
3
0.7±0.1 [0.079±0.002]
3
2
1
0.765±0.1
6
5
4
1
2
3
2.0±0.05 [0.079±0.002]
0.65±0.05 [0.026±0.002]
0.85±0.05
0.25±0.05 [0.099±0.002]
No.
1
2
3
4
5
Pin Terminal
Enable
N/C
Ground
OUT
N/C
6
VDD
0.85
0.65±0.05 [0.026±0.002]
_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 6
MK-Q-B-P-D-110410-01-6
DSC1101
DSC1121
Low-Jitter Precision CMOS Oscillator
7.0 x 5.0 mm Plastic Package (no center pad)
EXTERNAL DIMENSIONS
Units: mm [ inches]
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
Via to Ground
Plane
1.4±0.10 [0.055±0.004]
2.54 [0.100]
5
6
3.7 [0.146] REF
1
2
3
3
2
1
4
6
2.6 [0.102]
4
4
1.1±0.01[0.43±0.004]
5
5.08 [0.100]
3
1
1.4 [0.055]
7±0.10 [0.276±0.004]
6
Via to Power
Trace
5±0.10 [0.197±0.004]
No.
1
2
3
4
5
6
0.85±0.05
Pin Terminal
Enable
N/C
Ground
OUT
N/C
VDD
1.4 [0.055]
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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,
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Phone: +1 (408) 944-0800
●
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Fax: +1 (408) 474-1000
San Jose, California
95131
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_____________________________________________________________________________________________________________________________ _________________
DSC1101 | DSC1121
Page 7
MK-Q-B-P-D-110410-01-6
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