Epson’s FC3215AN is a 32.768 kHz crystal unit with a low ESR of 35 kΩ in a compact package, which is critical for portable electronics and very tight space-constrained applications. The FC3215AN crystal is ideal for a variety of applications, such as wireless modules, IoT, medical, industrial, security surveillance equipment, smart meters, consumer electronics, and low-power MCU applications. It supports an extended operating temperature range from -40°C to +105°C. The FC3215AN crystal is available in a 3.2 mm x 1.5 mm x 0.9 mm package with standard pinouts.