The ECS-.327-6-34B-TR is a miniature SMD tuning fork crystal designed for cost-effective, low-power real-time clock (RTC) applications. It features a compact 3.2 × 1.5 × 0.9 mm ceramic package with a low-profile 3.2 × 1.5 mm footprint, making it ideal for high-density circuit boards. The crystal operates at 32.768 kHz with a frequency tolerance of ±20 ppm at +25°C, a load capacitance of 6 pF, and an equivalent series resistance of 70 kO maximum. It operates reliably across an extended temperature range from -40°C to +85°C with a temperature coefficient of -0.034 ppm/°C² (typical), and is RoHS compliant. This device is commonly used in microcontroller-based RTC systems such as STM32 applications, where low power consumption and compact form factor are essential.