Preliminary Specification
Electrical Characteristics
Parameter Sym Conditions Min Typical Max Unit
Power
Requirements
Power Supply Vcc ± 5% 350L
±5% 350S 3.135
4.75 3.30
5.0 3.465
5.25 Vdc
Vdc
Supply Current Icc Vcc=Max. (3.3Vdc)
50Ω. Load (5.0Vdc) 55
80 mA
mA
Frequency
Stabilities
Center
Frequency fnom 832 1244.16 1664 MHz
Initial Tolerance fcal Ta=+25°C
EFC=Center(0.5Vcc) -10 +10 ppm
Freq. vs. Temp. ∆f/∆Temp Oper. Temp. Range ± 15 ppm
Freq. vs. Voltage ∆f/∆Vcc Vcc ±5% ± 1 ppm
Freq. vs. Load ∆f/∆RL ± 10% Variation ± 1 ppm
Freq. vs Time
(Aging) ∆f/∆Time 20 years ±10 ppm
Deviation
Characteristics
Control Voltage VC 3.3V “L” Version
5.0V “S” Version 0.15
0.5 3.15
4.5 V
V
Frequency
Deviation ∆f+25°C at time of
Shipment ± 125 ppm
Linearity Lin Best Staight Line Fit -10 5 10 %
Absolute Pull
Range APR Under all conditions
for the life of the part
(Ref. to fnom)
±85 ppm
Input Impedance Zin 100 KΩ
Waveform
Parameters
Symmetry Sym @ 50% Level 45 50 55 %
Amplitude Vo 50Ω Load Vcc-1.62V Vcc-1.025V V
Rise/Fall Times tr, tf 20% to 80% 225 350 pSec
Load RL Output to Vcc-2.0V
or Equivalent 50 Ω
Phase Jitter 12KHz to 20MHz or
50KHz to 80MHz
Bandwidth
<1 pSec RMS
Model 351
9x14mm Differential PECL
High Frequency VCXO
(832MHz to 1.66GHz)
♦ 9x14mm Surface Mount Pkg.
♦ Differential PECL Outputs
♦ Guaranteed Minimum Pull Range
♦ +3.3Vdc or +5.0Vdc Operation
♦ Sealed AT Strip Crystal
♦ Output Enable Function
♦ Low Phase Jitter: < 1 pSec RMS
♦ Excellent Solder Reflow Performance
♦♦♦
CTS Frequency Products
♦
400 W. North Street
♦
Carlisle, PA 17013
♦
717-243-5929
♦♦♦
Preliminary Specification
Model 351
9x14mm Differential PECL
High Frequency VCXO
(832MHz to 1.66GHz)
Storage Temperature: -55° to +125°C
Reflow Soldering: will withstand 240°C for 20 Seconds
Shock: 1500 G’s, 0.5 mSec. Pulse (3 Shocks/Axis)
Vibration: 10 G’s peak, 20 to 2000 Hz
Case: High Temp. FR-4 Base
Environmental / Mechanical Specifications
♦♦♦
CTS Frequency Products
♦
400 W. North Street
♦
Carlisle, PA 17013
♦
717-243-5929
♦♦♦
Ordering Information
Model 351 -- ___.________ Example: 351LAA-1333.03
351SBB-1244.16
Supply Voltage
L = +3.3Vdc
S = +5.0Vdc
Operating Temp. Range
A = 0° to +70°C
B = -40° to +85°C
Frequency in MHz
Rev. 2
Option “A”
Enable Truth Table
Pin 2 Pins 4&5
PECL “0”Disabled
PECL “1”Enabled
Open
Disabled
Option “B”
Enable Truth Table
Pin 2 Pins 4&5
PECL “0”Enabled
PECL “1”Disabled
Open
Enabled
Truth Table Option
A = Enable High
B = Enable Low
