Data Sheet

VFFT200
Frequency Translator
With Holdover to 200MHz
RoHS Status
Features
¾ Low Jitter and Phase noise
¾ Automatic Holdover Switching
¾ 10ppm Holdover Stability
¾ Low Profile SMD package
Applications
¾ Optical Networking, Sonet / SDH / ATM
¾ 10 Gigabit Ethernet
¾ Broadband Access
Description
The VFFT200 is a Frequency Translator which accepts a predetermined input frequency from
8KHz to 200 MHz and provides an output frequency from 50 MHz to200 MHz. The output will be
frequency locked to the input frequency during normal operation. In the event the input frequency
fails, the output frequency will remain within 20 ppm of the nominal frequency. A Lock Detect
output signal indicates an “out of lock” condition. The device is implemented with a Phase Locked
Loop where all Loop Filter components are integrated into the module. The VFFT200 is offered in
a 20.5mm x 19.5mm x 3.81 mm surface mount package.
LD
Filter
VCXO
PFD
R-Divider
F in
Fout
NFout
Disable
N- Divider
P1
P2
.1 uF
Block Diagram
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevA0607
1
VFFT200
Frequency Translator
With Holdover to 200MHz
Absolute Maximum Ratings
Parameter
Power Supply Voltage
Storage Temperature
Min
-.50
-45
Max
+4.0
+90
Units
Volts
ºC
Operating Specification
Parameter
Supply Voltage
Supply Current
Output Frequency
Output Level Logic “1”
Output Level Logic “0”
Jitter (rms)
Input frequency
Fin
Input Frequency Tracking
Input configuration
Input Level
Specification
3.3 Volts +/- 5%
80 mA (max)
50 to 200 MHz
Vcc - .9V (typ)
Vcc – 1.75 V (typ)
1 ps(max)
.008 to 200 MHz
5 ppm (min) / 10 ppm (max)
Notes
LVPECL
12 KHz to 20 MHz
Single-ended, AC coupled
400Vp-p(min) / 3.3Vp-p (max)
Modulation Bandwidth
Start up Time
Initial Lock Time
Lock Detect Output (LD)
4 Hz (Typ)
100 mS (max)
2 sec (max)
Logic “1” : In lock
Logic “0” : Out of lock
10 ppm (typ) 20 (max)
-40 ºC to +85 ºC
To Holdover accuracy
To a valid Fin
LVCMOS
Frequency Stability
Operating Temperature Range
Notes
1. The input frequency must be within 500 ppm of final value before asserting the “Select Inputs.”
Pin Assignments
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Symbol
Gnd
N/C
N/C
Fin
DNC
LD
DNC
Vcc
Gnd
n Fout
Fout
OD
P1
P2
Description
Ground
No Connection
No Connection
Input Frequency
Do not connect
Lock Detect
Do not connect
3.3 Volt Power Supply
Ground
Complementary Output Frequency
Output Frequency
Output Disable
Must be connected to P2
Must be connected to P1
Notes
Drive : 1 LVCMOS Load
Add .1 uF Capacitor
Add .1 uF Capacitor
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevA0607
2
VFFT200
Frequency Translator
With Holdover to 200MHz
Mechanical Outline
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevA0607
3
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