I-sup 2-C-bus-SMT-Real-time-clock-modules-Epson-Toyocom-RX-8564-Real-Time-Clock-Module-YY-MM-DD-Date-Format-HH-MM-SS-Time-Format-I2C-Interface-RTC-Features-Power-On-Reset-100ns-Data-Setup-Time-32-768k Hz-Clock-Frequency-5-23ppm-Frequency-Precision-1-8V-to-5-5V-Supply-Voltage-40-C-to-85-C-12-VSOJ-Case-The-Epson-Toyocom-RTC-RX-8564-Range-of-Modules-are-I2C-Bus-Interface-Real-Time-Clocks-that-Feature-a-Built-in-32-768k Hz-Crystal-Oscillator-Additional-Features-Include-Full-calendar