Epson Timing FA-128 Crystal Units offer a 16MHz to 54MHz frequency range and a 60Ω to 200Ω maximum resistance range. These crystal units feature 2mm x 1.6mm x 0.5mm external dimensions, a fundamental overtone order, and a -40°C to +85°C operating temperature range. Epson Timing FA-128 Crystal Units are ideal for BLUETOOTH® applications, mobile phones, and clocks for MPU.