ECS-327TXO SMD TCXO ECS ECS-327TXO SMD Temperature Compensated Crystal Oscillator (TCXO) is a low-power CMOS 32.768KHz TCXO in a 3.28mm x 2.5mm x 1.3mm ceramic package ideal for accurate RTC applications. This TCXO is AEC-Q200 qualified and operates at an extended temperature range from -40°C to +85°C.