ABFT-20.000MHZ-T2

Overview

The Abracon ABFT-20.000MHZ-T2 is a surface-mount frequency translator and jitter attenuator housed in a 5x7x2 mm package. It operates at a resonant frequency of 20 MHz with an internal absolute pull range exceeding ±100 ppm for long-term drift correction. The device accepts a 10 MHz reference input signal within ±20 ppm tolerance and provides phase and frequency locked LVCMOS output. Operating on a 3.3 V supply, it functions within an industrial temperature range of -40°C to +85°C. Key electrical parameters include a typical supply current of 20 mA under lock and a lock time of less than 50 ms.

Feature Summary

• Ultra-low jitter VCXO-based architecture for clock smoothing and jitter attenuation
• Frequency translation from 10 MHz input to 20 MHz or 40 MHz output
• Internal absolute pull range greater than ±100 ppm for aging and temperature compensation
• RoHS compliant and lead-free construction suitable for reflow soldering

Applications

• Datacom equipment including DSLAMs, DSLARs, and access nodes
• Cable modem head ends
• Telecommunications systems such as SONET, SDH, and ATM
• Base stations for GSM and CDMA networks

Procurement Notes

Verify the specific ordering suffix 'T2' corresponds to the 250-unit tape and reel packaging configuration. Confirm that the application environment remains within the specified industrial temperature limits of -40°C to +85°C. Ensure the input reference signal maintains stability within ±20 ppm of 10 MHz to guarantee proper device locking.

Selection Notes

Select this component when jitter attenuation and frequency translation are required simultaneously. The device requires a stable 10 MHz reference source, such as a Stratum-III TCXO or OCXO, to achieve optimal frequency stability over temperature. Designers must account for the 3.3 V supply voltage requirement and provide a 0.01 uF bypass capacitor between the ground and Vdd pins.

Part Context

The ABFT series represents Abracon's solution for improving signal integrity in high-speed digital systems. By utilizing VCXO technology, these devices effectively filter out close-to-carrier noise while maintaining phase coherence with the input reference. This makes them distinct from standard oscillators by offering active jitter reduction capabilities alongside frequency multiplication.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.