Micrel DSC1104BI2 Low-jitter precision hcsl oscillator Datasheet

DSC1104
DSC1124
Low-Jitter Precision HCSL Oscillator
General Description
Features
The DSC1104 & DSC1124 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.
DSC1104 has a standby feature allowing it to
completely power-down when EN pin is
pulled low; whereas for DSC1124, 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 HCSL quartz crystal oscillators.
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
Block Diagram
Lead Free & RoHS Compliant
LVPECL & LVDS Versions Available
Applications
Output Enable Modes
EN Pin
High
NC
Low
DSC1104
Outputs Active
Outputs Active
Standby
DSC1124
Outputs Active
Outputs Active
Outputs 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: Gen 1 & Gen 2
DisplayPort
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 1
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL 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 4 C I 5
40sec max.
V
Temp Range
E: -20 to 70
I: -40 to 85
L: -40 to 105
-
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
Supply Voltage
Condition
1
VDD
IDD
Frequency Stability
Δf
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
Aging
Startup Time2
Δf
tSU
1 year @25°C
T=25°C
Input Logic Levels
Input logic high
Input logic low
VIH
VIL
Output Disable Time3
tDA
Output Enable Time
tEN
Enable Pull-Up Resistor4
Typ.
2.25
EN pin low – outputs are disabled
DSC1104
DSC1124
Supply Current
Min.
20
Max.
Unit
3.6
V
0.095
22
mA
±10
±25
±50
±5
5
0.75xVDD
-
0.25xVDD
DSC1104
DSC1124
Pull-up resistor exist
ppm
ppm
ms
V
5
ns
5
20
ms
ns
40
kΩ
HCSL Outputs
Supply Current
IDD
Output Enabled, RL=50Ω
Output Logic Levels
Output logic high
Output logic low
VOH
VOL
RL=50Ω
Pk to Pk Output Swing
Output Transition time
Rise Time
Fall Time
40
0.725
-
Single-Ended
3
42
mA
0.1
V
750
mV
20% to 80%
RL=50Ω, CL= 2pF
200
400
ps
f0
Single Frequency
2.3
460
MHz
Output Duty Cycle
SYM
Differential
48
52
%
Period Jitter
JPER
Integrated Phase Noise
JPH
Frequency
Notes:
1.
2.
3.
4.
tR
tF
2.5
200kHz to 20MHz @156.25MHz
100kHz to 20MHz @156.25MHz
12kHz to 20MHz @156.25MHz
0.25
0.37
1.7
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.
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 2
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL Oscillator
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
2.5
0
-10
100-mV
-20
Phase Jitter (ps RMS)
Rejection (dBc)
50MHz-HCSL
50-mV
-30
-40
-50
-60
106MHz-HCSL
2.0
156MHz-HCSL
1.5
212MHz-HCSL
1.0
0.5
-70
0.0
-80
0.1
1
10
100
1000
0
10000
200
400
600
800
1000
Low-end of integration BW: x kHz to 20 MHz
Supply Noise Frequency (kHz)
Phase jitter (integrated phase noise)
Power supply rejection ratio
Output Waveform
tR
Output
tF
80%
675mv
mV
830
50%
Output
20%
tEN
1/f o
tDA
VIH
Enable
VIL
Typical Termination Scheme
VDD
0.1uF
Rs = 0 Ω f or test
6
2
5
3
4
Rs
100 Ω
Rs
Rs serves to match the trace
impedances. Depending on
board layout, the value may
range from 0 to 30 ohms.
50 Ω
50 Ω
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 3
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL Oscillator
Test Circuit
Solder Reflow Profile
Se
3C
/
217°C
200°C
60-150
Sec
S
6C/
ax
cM
Se
3C
/
25°C
60-180
Sec
Pre heat
8 min max
Reflow
x.
150°C
Ma
.
ec
Temperature (°C)
cM
ax
.
260°C
20-40
Sec
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
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 4
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL Oscillator
Package Dimensions
7.0 x 5.0 mm Plastic Package
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]
2.54[0.100]
6
1
2
3
1.8 [0.071]
3
2
2.8 [0.110]
5±0.10 [0.197±0.004]
1
No.
1
2
3
4
5
6
0.85±0.05
Pin Terminal
Enable
N/C
Ground
OUT
OUTVDD
TIE TO GND
PAD
6
5
4
1
2
3
2.6 [0.102]
5
1.4 [0.055]
4
4
3.7 [0.146] REF
5
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]
1.27 [0.050]
5±0.05 [0.197±0.002]
5
4
4
5
1
2
3
Via to Power
Trace
1.27[0.05]
0.64±0.05
6
1.2 [0.047] REF
6
RECOMMENDED SOLDER PAD LAYOUT
Units: mm [ inches]
Via to Ground
Plane
3
5
4
1
2
3
2
1
0.7±0.1 [0.079±0.002]
3.2±0.05 [0.126±0.002]
0.85±0.05
6
1.2 [0.047] REF
No.
1
2
3
4
5
Pin Terminal
Enable
N/C
Ground
OUT
OUT-
6
VDD
1.1 [ 0.043]
0.64 [0.025]
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 5
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL 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
0.375
Via to Ground
Plane
6
0.9 [0.035] REF
0.9 [0.035] REF
6
5
4
1
2
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]
0.5 [0.197]
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
OUTVDD
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
0.375
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
OUT-
6
VDD
0.85
0.65±0.05 [0.026±0.002]
0.25±0.05 [0.099±0.002]
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 6
MK-Q-B-P-D-110410-04-6
DSC1104
DSC1124
Low-Jitter Precision HCSL Oscillator
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]
2.54[0.100]
6
1.1±0.01[0.43±0.004]
5
1
2
3
3
2
1
6
5
4
1
2
3
2.6 [0.102]
4
4
3.7 [0.146] REF
5
1.4 [0.055]
7±0.10 [0.276±0.004]
6
Via to Power
Trace
5±0.10 [0.197±0.004]
0.85±0.05
No.
1
2
3
4
5
6
Pin Terminal
Enable
N/C
Ground
OUT
OUTVDD
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.
●
Phone: +1 (408) 432-8600
1961 Concourse Drive,
San Jose, California
95131
●
Fax: +1 (408) 432-8609 ● Email: [email protected]
●
●
USA
www.discera.com
_____________________________________________________________________________________________________________________________ _________________
DSC1104 | DSC1124
Page 7
MK-Q-B-P-D-110410-04-6
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