Micro Crystal Real Time Clock (RTC) Modules combine a 32.768kHz Tuning Fork Crystal Resonator with a CMOS Based Oscillator & RTC IC housed in a Miniature SMD Ceramic Package. Package sizes include C2 package (5.0x3.2mm), C3 package (3.7x2.5mm), C7 package (3.2x1.5mm). The RTCs offer high accuracy, temperature compensation, low cost, low current consumption, miniature packaging, extended operating temperature and automotive qualification according to AEC-Q200.