crystal based oscillators. Without sacrificing the
performance and stability required of today’s
systems, a crystal-less design allows for a
higher level of reliability, making the DSC1028
ideal for rugged, industrial, and portable
applications where stress, shock, and vibration
can damage quartz crystal based systems.
Available in industry standard packages, the
DSC1028 can be “dropped-in” to the same PCB
footprint as standard crystal oscillators.
Features
Frequency Range: 1 to 150MHz
Exceptional Stability over Temperature
o
±25 PPM, ±50 PPM
Operating voltage
o
2.6 to 3.0V
Operating Temperature Range
o
Industrial -40ºC to 85ºC
o
Ext. Commercial -20ºC to 70ºC
o
Commercial 0ºC to 70ºC
Low Operating and Standby Current
o
3mA Operating (40MHz)
o
1uA Standby
Ultra Miniature Footprint
o
2.5 x 2.0 x 0.85 mm
o
3.2 x 2.5 x 0.85 mm
o
5.0 x 3.2 x 0.85 mm
o
7.0 x 5.0 x 0.85 mm
Excellent Shock and Vibration
Resistance
Lead Free, RoHS & Reach SVHC
Compliant
Benefits
Block Diagram
V
DD
Output
Pin for pin “drop in” replacement for
industry standard oscillators
Semiconductor level reliability,
significantly higher than quartz
Short mass production lead-times
Longer Battery Life / Reduced Power
Compact Plastic package
Cost Effective
Resonator
PFD
VCO
Applications
Frac-N
PLL
Standby#
(pin1)
GND
Mobile Applications
Consumer Electronics
Portable Electronics
CCD Clock for VTR Cameras
Low Profile Applications
Industrial
All Rights Reserved. No part of this document may be copied or reproduced in any form without the prior written permission of Micrel, Inc. Micrel Inc. may update or make changes
to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to
implied warranties of merchantability or fitness for a particular use.
Page 1
MK-Q-B-P-D-031809-03-7
DSC1028
2.8V
Low-Power CMOS Oscillator
Absolute Maximum Ratings
1
Item
Input Voltage
Junction Temp
Storage Temp
Soldering Temp
ESD
HBM
MM
CDM
Min.
-0.3
-
-55
-
-
2000
200
500
Max
VDD+0.3
+150
+150
+260
Unit
V
°C
°C
°C
V
40 sec max.
Condition
DSC1028
Family
Package, Temp
& Stability
CE1
-
032.0000
T
Output Freq
1.0 to 150MHz
Tape/
Reel
* See Ordering Information for details
Ordering Code
Recommended Operating Conditions
Parameter
Supply Voltage
Output Load
Operating Temperature
Option 1
Option 2
Option 3
Symbol
V
DD
Z
L
T
Range
2.6 to 3.0V
R>10KΩ, C≤15pF
-40 − +85 °C
-20 − +70 °C
0 − +70 °C
Specifications
Parameter
Frequency
Frequency Tolerance
Option 1
Option 2
Option 3
Supply Current, no load
Supply Current, standby
Output Logic Levels
Output logic high
Output logic low
Output Transition time
Rise Time
Fall Time
Output Startup Time
2
Output Disable Time
Output Duty Cycle
Input Logic Levels
Input logic high
Input logic low
Jitter, Cycle to Cycle
Symbol
f
0
Condition
Single Frequency
-40°C to +85°C
-20°C to +70°C
0°C to +70°C
C
L
=0p
1 to 40MHz
R
L
=∞
40 to 80MHz
T=25°
80 to 125MHz
C
125 to 150MHz
T=25°C
C
L
=15pF
C
L
=15pF; T=25°C
20%/80%*V
DD
T=25°C
0.8*V
DD
-
1.3
1.3
1.5
20
45
0.75*V
DD
-
F = 100MHz
3
95
Min.
1
Typ.
Max.
150
±25,±50
±25,±50
±25,±50
3
4
5
6
Unit
MHz
ppm
Δf
I
DD
I
DD
V
OH
V
OL
t
R
t
F
t
SU
t
DA
SYM
V
IH
V
IL
J
CC
10
1.0
-
0.2*V
DD
2
2
3
100
55
-
0.25* V
DD
mA
uA
Volts
ns
ms
ns
%
Volts
ps
Notes:
1.
Absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be
operated beyond these limits.
2.
t
SU
is time to stable output frequency after V
DD
is applied. t
SU
and t
EN
(after EN is asserted) are identical values.
3.
See typical cycle to cycle jitter graph for frequency dependence.
All Rights Reserved. No part of this document may be copied or reproduced in any form without the prior written permission of Micrel, Inc. Micrel Inc. may update or make changes
to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to
implied warranties of merchantability or fitness for a particular use.
Page 2
MK-Q-B-P-D-031809-03-7
DSC1028
2.8V
Low-Power CMOS Oscillator
Nominal Performance Characteristics
2.8V Characteristics
Supply Current
16
1
Standby Current
Standby Current (µA)
8pF
15pF
0.8
0.6
0.4
0.2
0
-40°C
25°C
85°C
Supply Current (mA)
Ta = 25°C
12
8
4
0
0
50
1pF
100
Frequency (MHz)
150
0
50
100
Frequency (MHz)
150
Rise Time
2
-40°C
25°C
85°C
2
Fall Time
-40°C
25°C
85°C
Rise Time (ns)
1
0.5
0
0
50
100
Frequency (MHz)
150
Fall Time (ns)
1.5
1.5
1
0.5
0
0
50
100
Frequency (MHz)
150
Period Jitter
40
25°C
200
Cycle to Cycle Jitter
25°C
150
RMS Jitter (ps)
30
20
10
0
0
50
100
Frequency (MHz)
150
Jitter (ps)
100
50
0
0
50
100
Frequency (MHz)
150
All Rights Reserved. No part of this document may be copied or reproduced in any form without the prior written permission of Micrel, Inc. Micrel Inc. may update or make changes to
the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to implied
warranties of merchantability or fitness for a particular use.
Page 3
MK-Q-B-P-D-031809-03-7
DSC1028
Output Waveform
t
R
V
OH
2.8V
Low-Power CMOS Oscillator
t
F
Output
V
OL
1/f
o
t
DA
V
IH
t
EN
Standby#
V
IL
Standby Function
Standby#
(pin 1)
Output
(pin 3)
Hi Level
Open
(no connect)
Low Level
Output ON
Output ON
High Impedance
Test Circuit
I
DD
4
V
DD
1
0.01uF
*V
SD
3
2
15pF
*V
SD
= Standby# Logic Level Input
All Rights Reserved. No part of this document may be copied or reproduced in any form without the prior written permission of Micrel, Inc. Micrel Inc. may update or make changes
to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to
implied warranties of merchantability or fitness for a particular use.
Page 4
MK-Q-B-P-D-031809-03-7
DSC1028
2.8V
Low-Power CMOS Oscillator
Board Layout (recommended)
Solder Reflow Profile
ax
260
°
C
Temperature (°C)
Se
cM
.
20-40
Sec
217
°
C
200
°
C
.
ax
cM
60-150
Sec
150
°
C
3C
/Se
60-180
Sec
Reflow
Pre heat
8 min max
Cool
Time
25
°
C
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.
3C
/
S
S
S
6C
6C
6C/
c
c
ec
Ma
Ma
Ma
.
.
x.
Package Dimensions
7.0 x 5.0 mm Plastic Package
External Dimensions
7.0±0.10 [0.276±0.004]
#4
#3
2.6 [0.102]
3.5 [0.138]
2.2 [0.087]
Recommended Land Pattern*
5.08 [0.200]
#4
2.6 [0.102]
o
0.2 [0.008]
o
o
#1
1.2 [0.047]
0.2 [0.008]
1.4 [0.055]
*Note: The center pad is not connected
internally and should be left un-
connected or tied to GND.
5.08 [0.2]
#3
o
o
o
1.4 [0.055]
#1
#2
5.0±0.10 [0.197±0.004]
#2
1.4 [0.055]
0.2 [0.008]
0.85±0.05 [0.033±0.002]
No.
1
2
3
4
Pin Terminal
Standby#
GND
Output
VDD
units: mm [inch]
All Rights Reserved. No part of this document may be copied or reproduced in any form without the prior written permission of Micrel, Inc. Micrel Inc. may update or make changes
to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to
implied warranties of merchantability or fitness for a particular use.
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