VX-503
Voltage Controlled Crystal Oscillator
VX-503
Description
The VX-503 voltage controlled crystal oscillator expands VI’s advanced VCXO performance capabilities while adhering to a package footprint compatible with the industry-common J-lead package. The VX-503 VCXO is a quartz stabilized square wave generator with either a CMOS output for driving CMOS/TTL loads or a PECL output. The device is packaged in a 6 pin J-lead ceramic package and is hermetically sealed with a grounded conductive lid.
Features
• • • • Small 14mm x 9mm Low phase noise Frequency Range: 1 MHZ to 800 MHZ Previous Model: J-Type
Applications
• Clock Smoothing • Frequency Translation • SONET, SDH, ATM, DSLAM, ADM
Performance Speci cations
Parameter Pin
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
Min
Typ
Max Function
Units
Condition
Pin Out Information for the CMOS output Option Symbol
VC Tri-State1 GND Output CMOS/TTL select1,2 VCXO Control Voltage TTL logic low disables output. TTL logic high, or no connect, enables output. Case and Electrical Ground VCXO Output TTL logic low optimizes symmetry for CMOS. TTL logic high, or NC, optimizes symmetry for TTL Power Supply Voltage (5.0 V or 3.3 V ±10%)
Pin 6
VCC
1. Standard option. Tri-State can be connected to pin 5 and CMOS/TTL select would be on pin 2. 2. Output is HCMOS. For frequencies >12MHz, this option optimizes symmetry for either CMOS or TTL thresholds. Ground this pin for frequencies < 12MHz.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Performance Speci cations
Parameter
Supply voltage Current consumption Center Frequency Absolute Pull Range over the operating temperature range, aging and power supply Vc= 0.5 to 4.5 or 0.3 to 3.0 V
Min
4.5 3.0
Typ
5.0 3.3
Max
5.5 3.6
Units
VDC VDC
Condition
Electrical Performance @ 25°C for the CMOS output option
10mA + 0.25mA per MHz, typical 1.024 -100 -80 -50 -100 -80 -50 77.760 +100 +80 +50 +100 +80 +50 Positive 0.8 0.1 5 45 40 55 60 ±1 10 3
