PE78D Series 3.3 V
PECL Clock Oscillators
August 2005
• Pletronics’ PE78D Series is a quartz crystal
controlled precision square wave generator
with a PECL output.
• FR4 base with a mechanical metal cover.
• Solder pad compatible with many 9x14mm
plastic J lead packages.
• Has internal bypass capacitor on the Vcc lead
• Tape and Reel or Tube packaging is available.
• 40 to 250 MHz
• 9.04mm x 8.91mm (S package)
• Enable/Disable Function on pad 2
(see PE76D for E/D on pad 1)
• Disable function includes low standby power
mode
• 3
rd
Overtone Crystals used
• Low Jitter
• 5x7 mm LCC ceramic oscillator inside
Pletronics Inc. certifies this device is in accordance with the
RoHS (2002/95/EC) and WEEE (2002/96/EC) directives.
Pletronics Inc. guarantees the device does not contain the following:
Cadmium, Hexavalent Chromium, Lead, Mercury, PBB’s, PBDE’s
Weight of the Device: 0.4 grams
Moisture Sensitivity Level: 1 As defined in J-STD-020C
Second Level Interconnect code: e4
Absolute Maximum Ratings:
Parameter
V
CC
Supply Voltage
Vi
Vo
Input Voltage
Output Voltage
Unit
-0.5V to +7.0V
-0.5V to V
CC
+ 0.5V
-0.5V to V
CC
+ 0.5V
Thermal Characteristics
The maximum die or junction temperature is 155
o
C
The thermal resistance junction to board is 60 to 100
o
C/Watt depending on the solder pads, ground plane
and construction of the PCB.
Product informatin is current as of publication date. The product conforms
to specifications per the terms of the Pletronics standard warranty. Production
processsing does not necesarily include testing of all parameters.
Copyright © 2005, Pletronics Inc.
PE78D Series 3.3 V
PECL Clock Oscillators
August 2005
Part Number:
PE78
45
D
E
V
- 125.0M
-XX
Internal code or blank
Frequency in MHz
Supply Voltage V
CC
V
= 3.3V + 10%
_
Enhanced Specifications
E
= Temperature range -40 to 85
o
C
Series Model
Frequency Stability
45
= + 50 ppm
_
44
= + 25 ppm
_
20
= + 20 ppm
_
Series Model
5
4
2
PE78D
fff.fff
M
V or B
E
Marking
Part Marking:
PE78Dx
fff.fff
M
PLE
ss
yywwa
Where:
x
fff.fff
ss
yywwa
= Frequency stability
= frequency in MHz
= Enhanced specification and voltage
= Date code
Pletronics may ship the following combinations without notice (this is an enhanced specified device)
44 (25 ppm) stability parts when 45 (50 ppm) was ordered
20 (20 ppm) stability parts when 45 (50 ppm) or 44 (25 ppm) was ordered.
E temperature range parts when extended was not ordered.
Pletronics may ship parts that are not marked for extended temperature range but were tested for
extended temperature range, a Certificate of Conformance will accompany these parts.
www.pletronics.com
425-776-1880
2
PE78D Series 3.3 V
PECL Clock Oscillators
August 2005
Electrical Specification for 3.30V +10% over the specified temperature range
_
Item
Frequency Range
Frequency Accuracy
“45"
“44"
“20"
Output Waveform
Output High Level (0
o
C to 85
o
C)
2.275
0.975
Output High Level (-40
o
C)
2.216
0.916
-1.084
Output Low Level (0
o
C to 85
o
C)
1.490
0.190
Output Low Level (-40
o
C)
1.470
0.170
Output Symmetry
Jitter
Output T
RISE
and T
FALL
V
CC
Supply Current (I
CC
)
Enable/Disable Internal Pull-up
V disable
V enable
Output leakage
Enable time
Disable time
Start up time
Operating Temperature Range
Storage Temperature Range
Standby Current I
CC
V
OUT
= V
CC
V
OUT
= 0V
45
-
-
-
-
50
-
2.40
-10
-10
-
-
-
0
- 40
-55
-
Min
40
-50
-25
-20
Max
250
+50
+25
+20
PECL /ECL
2.420
1.120
2.420
1.120
-0.88
1.680
0.380
1.745
0.445
55
0.13
2.8
0.7
90
-
0.6
-
+10
+10
10
10
10
+70
+85
+125
3
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
%
pS RMS
pS RMS
nS
mA
Kohm
volts
volts
uA
uA
nS
nS
mS
o
o
o
Unit
MHz
ppm
Condition
Consult factory for higher frequency
For all supply voltages, load changes, aging for 1
year, shock, vibration and temperatures
Referenced to Ground, V
CC
= 3.3 V
Referenced to termination voltage, V
CC
= 3.3 V
Referenced to Vcc, V
CC
= 3.3 V
Referenced to Ground, V
CC
= 3.3 V
Referenced to termination voltage, V
CC
= 3.3 V
Referenced to Vcc, V
CC
= 3.3 V
Referenced to Ground, V
CC
= 3.3 V
Referenced to termination voltage, V
CC
= 3.3 V
Referenced to Vcc, V
CC
= 3.3 V
Referenced to Ground, V
CC
= 3.3 V
Referenced to termination voltage, V
CC
= 3.3 V
Referenced to Vcc, V
CC
= 3.3 V
at 50% point of V
CC
(See load circuit)
12 KHz to 20 MHz from the output frequency
10 Hz to 1 MHz from the output frequency
Vth is 20% and 80% of waveform
to V
CC
Referenced to pad 3
Referenced to pad 3
Pad 1 low, device disabled
Time for output to reach a logic state
Time for output to reach a high Z state
Time for output to reach specified frequency
Standard Temperature Range
Extended Temperature Range
Pad 1 low, device disabled
“E” Option
-1.025 -0.880
-1.810 -1.620
-1.830 -1.555
C
C
C
uA
Specifications with Pad 2 E/D open circuit
www.pletronics.com
425-776-1880
3
PE78D Series 3.3 V
PECL Clock Oscillators
August 2005
Typical Phase-Noise Response
0
-20
-40
dBc/Hz
-60
-80
-100
-120
-140
-160
10
1,000
100,000
10,000,000
Frequency (Hz)
Load Circuit
Test Waveform
Symmetry
Vhigh
80%
50%
20%
Vlow
Trise
Tfall
Out
Out*
Showing Out Measurement only
www.pletronics.com
425-776-1880
4
PE78D Series 3.3 V
PECL Clock Oscillators
August 2005
Reliability
: Environmental Compliance
Parameter
Mechanical Shock
Vibration
Solderability
Thermal Shock
Condition
MIL-STD-883 Method 2002, Condition A
MIL-STD-883 Method 2007, Condition A
MIL-STD-883 Method 2003
MIL-STD-883 Method 1011, Condition A
ESD Rating
Model
Human Body Model
Charged Device Model
Minimum Voltage
1500
1000
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
Package Labeling
Label is 1" x 2.6" (25.4mm x 66.7mm)
Font is Courier New
Bar code is 39-Full ASCII
Label is 1" x 2.6" (25.4mm x 66.7mm)
Font is Arial
Layout and application information
Recommend connecting Pad 1 and Pad 2 together to permit the design to accept both Enable/Disable
input pad versions to be used (See PE76D for E/D on pad 1)
For Optimum Jitter Performance, Pletronics recommends:
•
a ground plane under the device
•
no large transient signals (both current and voltage) should be routed under the device
•
do not layout near a large magnetic field such as a high frequency switching power supply
•
do not place near piezoelectric buzzers or mechanical fans.
www.pletronics.com
425-776-1880
5
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