TSX-3225 Series Miniature MHz Range Crystal Units Epson TSX-3225 Series Miniature MHz Range Crystal Units are SMD that offer a frequency range of 16MHz to 48MHz and a miniature, low profile size of 3.2 x 2.5 x 0.6t (mm). The TSX-3225 Series offers a Fundamental overtone order and is ideal for mobile phones, Bluetooth, W-LAN ISM band radio, and as a clock for MPU.