Microchip, Real Time Clock 64 B Real Time Clock D:M:Y, DW, 8-Pin SOIC Surface

The MCP7940N series of low-power Real-Time Clocks (RTC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for versatility, and a power sense circuit that automatically switches to the backup supply. Using a low-cost 32.768 kHz crystal, it tracks time using several internal registers.

• Battery Backup
• 64 Bytes Battery-Backed SRAM
• 2-Wire Serial Interface, I2C™Compatible
• I2C Clock Frequency up to 400 kHz
• Low-Power
• Wide Voltage Range
• Operating Voltage 1.8V to 5.5V
• Backup Voltage 1.3V to 5.5V
• Low Typical Timekeeping Current
• Automatic Switchover to Battery Backup