This part is a kind of semiconductor called ABL-20.000MHZ-B2.
Function of this product has Crystals.
Manufacturers : Abracon
Image and pinout :
Some of the text within the PDF file :
Crystals AB Series HC49U Crystals Specifications: • Frequency Stability: ±100ppm, -20°C ~ 70°C • Frequency Tolerance: ±20ppm • Operating Temperature: -20°C ~70°C • Load Capacitance: 18.0pF Frequency (MHz) 1.843200 2.000000 3.579545 3.686400 4.000000 4.915200 5.000000 6.000000 7.372800 8.000000 8.192000 9.830400 10.000000 11.059200 12.000000 12.288000 14.318180 14.745600 16.000000 18.432000 19.660800 20.000000 22.118400 24.000000 24.576000 25.000000 27.000000 32.000000 32.768000 48.000000 50.000000 Digi-Key Part No. 535-9009-ND 535-9016-ND 535-9019-ND 535-9020-ND 535-9022-ND 535-9023-ND 535-9025-ND 535-9026-ND 535-9027-ND 535-9028-ND 535-9029-ND 535-9030-ND 535-9000-ND 535-9001-ND 535-9002-ND 535-9003-ND 535-9004-ND 535-9005-ND 535-9006-ND 535-9007-ND 535 [ ... ]