HA-1521

CRYSTAL CLOCK OSCILLATORS TTL Data Sheet 0016G Rev. D HA-1520 Series Description The HA-1520 Series of quartz crystal oscillators provide enable/disable 3-state TTL compatible signals for bus connected systems. Supplying Pin 1 of the HA-1520 units with a logic “1" enables its output on Pin 5. In the disabled mode, Pin 5 presents a high impedance to the load. All units are resistance welded in an all metal package, offering RFI shielding, and are designed to survive standard wave soldering operations without damage. Insulated standoffs to enhance board cleaning are standard. Features • Wide frequency range– 0.5MHz to 85.0MHz • User specified tolerance available • Will withstand vapor phase temperatures of 253°C for 4 minutes maximum • Space-saving alternative to discrete component oscillators • High shock resistance, to 3000g • All metal, resistance weld, hermetically sealed package Electrical Connection Pin 1 4 5 8 Connection Enable Input Grd & Case Output VCC • Low Jitter • High Q Crystal actively tuned oscillator circuit • Power supply decoupling internal • No internal PLL avoids cascading PLL problems • Low power consumption • Gold plated leads - Solder dipped leads available upon request Dimensions are in inches and (MM) 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com CRYSTAL CLOCK OSCILLATORS HA-1520 TTL Continued Data Sheet 0016G Rev. D Operating Conditions and Output Characteristics Electrical Characteristics Parameter Frequency Duty Cycle Logic 0 Logic 1 Rise & Fall Time Tpz Jitter, RMS(2) Frequency Stability (1) Symbol --------VOL VOH tr,tf --------dF/F Conditions ----@ VCC/2 @ 16mA @ 0.4mA @ 0.4 to 2.4V