AS49SD-13.56M-FC180C3 CRYSTAL 13.56MHZ HC49SMT 18PF 20ppm SMD TR AS49SD-13.56M-FC180C3 is a high-performance crystal component that operates at a frequency of 13.56MHz with a frequency stability of ±20PPM.Features equivalent series resistance (ESR) of 40 Ohms. Compact dimensions: length 11.50mm, width 4.80mm, and height 4.20mm. Supports a temperature range of -20°C~+70°C for reliable performance. Manufactured by ANSEN with compliance to ROHS standards. Packaged as TAPE&REEL for convenience.