ECS ECX-1637B2 SMD Crystals offer low first-year aging of ±2ppm and come in a compact 2.0mm x 1.6mm x 0.45mm ceramic package. These crystals feature a 16MHz to 50MHz frequency range and operate in a -30°C to +85°C temperature range with an extended temperature range available. ECS ECX-1637B2 SMD Crystals are ideal for use in wireless applications