DSC1102/22
Low-Jitter Precision LVPECL Oscillator
Features
• Low RMS Phase Jitter: <1 ps (typ.)
• High Stability: ±10 ppm, ±20 ppm, ±25 ppm,
±50 ppm
• Wide Temperature Range
- Ext. Industrial: –40°C to +105°C
- Industrial: –40°C to +85°C
- Ext. Commercial: –20°C to +70°C
• High Supply Noise Rejection: –50 dBc
• Wide Frequency Range: 2.3 MHz to 460 MHz
• Small Industry Standard Footprints:
- 2.5 mm x 2.0 mm, 3.2 mm x 2.5 mm,
5.0 mm x 3.2 mm, and 7.0 mm x 5.0 mm
• Excellent Shock and Vibration Immunity
- Qualified to MIL-STD-883
• High Reliability
- 20x Better MTF than Quartz Oscillators
• Low Current Consumption
• Supply Range of 2.25V to 3.63V
• Standby and Output Enable Function
• Lead Free and RoHS Compliant
• LVDS and HCSL Versions Available
General Description
The DSC1102 and DSC1122 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.
DSC1102 has a standby feature allowing it to
completely power down when EN pin is pulled low;
whereas for DSC1122, only the outputs are disabled
when EN is low. Both oscillators are available in
industry standard packages, including the smallest
2.5 mm x 2.0 mm, and are drop-in replacements for
standard 6-pin LVPECL quartz crystal oscillators.
Block Diagram
Pin 1
ENABLE
Applications
• Storage Area Networks
- SATA, SAS, Fibre Channel
• Passive Optical Networks
- EPON, 10G-EPON, GPON, 10G-GPON
• Ethernet
- 1G, 10GBASE-T/KR/LR/SR, and FCoE
• HD/SD/SDI Video and Surveillance
TEMP SENSOR &
COMPENSATION
CIRCUITRY
MEMS
OSCILLATOR
DIVIDER
DRIVER
Pin 6
V
DD
Pin 2
NC
PLL
Pin 5
OUTPUT
Pin 3
GND
Pin 4
OUTPUT
TABLE 1:
EN Pin
High
NC
Low
OUTPUT ENABLE MODES
DSC1102
Outputs Active
Outputs Active
Standby
DSC1122
Outputs Active
Outputs Active
Outputs Disabled
2019 Microchip Technology Inc.
DS20006254A-page 1
DSC1102/22
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage .......................................................................................................................................... –0.3V to +4.0V
Input Voltage .................................................................................................................................... –0.3V to V
DD
+ 0.3V
ESD Protection (HBM) ...............................................................................................................................................4 kV
ESD Protection (MM) ............................................................................................................................................... 400V
ESD Protection (CDM) ............................................................................................................................................1.5 kV
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
Specifications: V
DD
= 3.3V; T
A
= +25°C unless otherwise specified.
Parameters
Supply Voltage (Note
1)
Sym.
V
DD
Min.
2.25
—
Supply Current
I
DD
—
—
Frequency Stability
Δf
—
—
—
Aging - First Year
Aging - After First Year
Start-up Time (Note
2)
Input Logic Levels
Output Disable Time (Note
3)
Output Enable Time
Enable Pull-Up Resistor
(Note
4)
LVPECL Outputs
Supply Current
Output Logic Levels
Peak-to-Peak Output Swing
Note 1:
2:
3:
4:
I
DD
V
OH
V
OL
—
—
V
DD
– 1.08
—
—
56.5
—
—
800
58
—
V
DD
– 1.55
—
mA
V
mV
Output Enabled, R
L
= 50Ω
Output logic high, R
L
= 50Ω
Output logic low
Single-Ended
Δf
Y1
Δf
Y2+
t
SU
V
IH
V
IL
t
DA
t
EN
R
PU
—
—
—
0.75 x V
DD
—
—
—
—
—
20
—
—
—
—
—
—
—
—
—
—
—
—
40
22
±10
±20
±25
±50
±5
<±1
5
—
0.25 x V
DD
5
5
20
—
ppm
ppm/yr
ms
V
ns
ms
ns
kΩ
ppm
Typ.
—
—
Max.
3.63
0.095
mA
Units
V
—
DSC1102, EN pin low,
Output is disabled
DSC1122, EN pin low,
Output is disabled
Includes frequency variation
due to initial tolerance,
temp., and power supply
voltage.
One year at +25°C
Year two and beyond at
+25°C
T = +25°C
Input logic high
Input logic low
—
DSC1102
DSC1122
Pull-up resistor exists
Conditions
Pin 6 V
DD
should be filtered with a 0.1 μF capacitor.
t
SU
is time to 100 ppm stable output frequency after V
DD
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.
DS20006254A-page 2
2019 Microchip Technology Inc.
DSC1102/22
TEMPERATURE SPECIFICATIONS (Note
1)
Parameters
Temperature Ranges
–20
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Soldering Temperature
Note 1:
T
A
T
J
T
S
—
–40
–40
—
–55
—
—
—
—
—
—
—
+70
+85
+105
+150
+150
+260
°C
°C
°C
°C
°C
°C
Ordering Option E
Ordering Option I
Ordering Option L
—
—
40 sec. max.
Sym.
Min.
Typ.
Max.
Units
Conditions
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature, and the thermal resistance from junction to air (i.e., T
A
, T
J
,
JA
). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +150°C rating. Sustained junction temperatures above +150°C can impact the device reliability.
DS20006254A-page 4
2019 Microchip Technology Inc.
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