Voltage Controlled Crystal Oscillators
3GPF576 Series +3.3V, “F” family, PECL Outputs
V C X O
MERCURY
Since 1973
3GPF576 VCXO products feature 0.4 ps typical phase jitter and
low phase noise (-132 dBc at 10 KHz for 155.520 MHz).
Differential PECL Outputs meet the requirements for
SONET, XDSL and other communication protocols.
General Specifications
Product Series
Frequency Range
Output Logic
3GPF576
38 MHz ~ 640 MHz.
Differential PECL 100 K square wave
Industrial “ I ”:
-40°C to +85°C
Commercial “ C ”::
-10°C to +70°C
Stability Code
±25 ppm
±50 ppm
A
B
D
E
Frequency Stability
±100 ppm
Custom ±xx ppm
C
Cxx
F
Ixx
vs Operating Temperature
Range
If custom, use “temperature range code + desired ppm stability” for the
stability code. Example: “C20” (±20 ppm over -10 to +70°C) or “I35”.
vs Supply Voltage Change ±3 ppm max.with ±10% supply voltage change
vs Load Change ±2 ppm max.with ±10% Load change:
Supply Voltage VCC
+3.3 V ± 10 %
Output Voltage HIGH “1”, VOH
Output Voltage LOW “0”, VOL
2.275 V min.; 2.420 V max. Condition: 50 ohms to VDD-2V
1.490 V min..; 1.680 V max. Condition: 50 ohms to VDD-2V
38 MHz≤ fout ≤ 100 MHz: 70 mA max.
100 MHz< fout ≤ 320 MHz: 85 mA max
320 MHz< fout ≤ 640 MHz: 95 mA max
50 ohms into VCC-2V or Thevenin equivalent (terminating resistors
required on all outputs). See test circuit below.
fout < 150 MHz: 0.5 ns typical; 0.7 ns max.
Current Consumption
Load
Rise Time (Tr) and
Fall Time (Tf)
150 MHz ≤ fout ≤ 320 MHz: 0.4 ns. typical; 0.55 ns. max
320 MHz < fout ≤ 640 MHz: 0.3 ns. typical; 0.45 ns. max
Measured at 20% ↔ 80% of the wave form.
Duty Cycle
50% ± 5% max. measured at 50% waveform.
+1.65 V
Control Voltage Center
Control Voltage Range
Vcon= +0.3 V to +3.0 V
From ± 80 ppm to ± 120 ppm. Use “N” (minimum), “M”
Frequency Deviation Range
(maximum), “T” (typical, ±20%) for the desired range.
Example: 120M represents ±120 ppm maximum.
Linearity
6% typical; 10% max.
Slope Polarity (Transfer Function) Positive: Positive voltage for positive frequency shift
Modulation Band Width
Input Impedance
25 KHz min. (- 3dB, 0V ≤ Vcon ≤ 3.3V)
60 KΩ min.
Tri-state
No Connection
Differential PECL and complimentary PECL outputs.
MERCURY
www.mercury-crystal.com
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: sales-tw@mercury-crystal.com
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: sales-us@mercury-crystal.com
MERCURY
Page 1 of 4
Date: April 1, 2008
Rev. 1