Pl tronics, Inc.
.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
40.000 MHz
50.000 MHz
51.840 MHz
53.125 MHz
62.500 MHz
77.760 MHz
180.00 MHz
PE7745D PECL Series
6 Pad 7x5mm Leadless Surface Mount Ceramic Clock Oscillator
–
80.00 MHz
Differential PECL Output with Enable/ Disable Function
See PE1145T for higher frequencies
Standard Specifications
Overall Frequency Stability
± 50 PPM, ± 25 PPM, ± 20 PPM over Operating Temperature Range
ꢁ
ꢀ
Operating Temperature Range 0 to +80 C is standard, but can be extended to 40 to +85ꢀC for certain frequencies
Supply Voltage (Vcc)
Supply Current (Icc)
Jitter
3.3 volts ± 10% standard, but 5.0 volts or 2.5 volts also available
60 to 70 mA typical, 90 mA maximum
1 pS RMS maximum, from 12 kHz to 20 MHz from carrier
Output must be terminated into 50 ohms to (Vcc - 2.0 V). See Test Circuit 5 and Note 1.
Output enabled when Pin 1 is open or at CMOS Logic “1”;
Output disabled when Pin 1 is at CMOS Logic “0”.
Output Load
Enable/Disable Option (E/D)
Symmetry
Tr & Tf
Logic “1”
45/55% to 55/45% at 50% of Vcc level standard, tighter symmetry available
1.0 nS max
Vcc - 1.025 volts minimum
Vcc - 1.620 volts maximum
Output Waveform
PECL with Differential Output
(see Waveform 2)
Logic “0”
Note 1:
In the typical PECL 100K logic output Voh is 2.35 volts and Vol is 1.60 volts at 3.3 Vcc. The center voltage of the PECL is therefore1.975 volts.
If a 50 ohm resistor is placed between the output and Vcc – 2 volts (1.3 volts), the current through the resistor is (1.975 – 1.3) / 50 = 13.5 mA.
±
The same load can be simulated by a resistor of 147 1% ohms to ground (1.975 / 0.0135 = 146.29 ohms). If additional load current is placed
on the output, its load current must be subtracted from the 13.5 mA to calculate a new load resistor. Using similar calculations, use 274 ± 1%
ohms to ground for 5.0V operation.
Part Numbering Guide
Portions of the part number that appear after the frequency may not be marked on part (C of C provided)
PE77 45 D Y - 80.0M - XXX (Internal Code or blank)
Model
Frequency in MHz
Packaging
Tray or
Special Specifications (choose all that apply)
16mm tape,
8mm pitch
Frequency Stability
ꢀ
E: Extended Operating Temperature Range (- 40 to +85 C)
F: 47.5 /52.5% Symmetry at 50% of Vcc
V: Supply Voltage of 3.3 volts ± 10%
W: Supply Voltage of 2.5 volts ± 5%
Y: Supply Voltage of 5.0 volts ± 10%
45 = ± 50 PPM
44 = ± 25 PPM
20 = ± 20 PPM
Consult factory for available frequencies and specs. Not all options available for all frequencies. A special part number may be assigned.
Frequency Stability is inclusive of frequency shifts due to calibration, temperature, supply voltage, shock, vibration and load
Mechanical: inches (mm)
not to scale
Due to part size and factory abilities, part marking may vary from lot to lot and may contain our part number or an internal code.
Solder Pads
.200 (5.08)
.276 (7.0 ± .2)
For Best Performance,
5
2
4
3
6
1
PLE
Do NOT allow any traces other
than ground under oscillators
(Even in buried layers)
.075 (1.9)
MAX
.05
(1.3)
Nov 2003
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
Pl tronics, Inc.