Maxim Integrated DS1670E+, Real Time Clock Multiplexed, 20-Pin TSSOP

Provides Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100 Power-Control Circuitry Supports System Power-On from Day/Time Alarm
Microprocessor Monitor Halts Microprocessor During Power Fail Automatically Restarts Microprocessor after Power Failure Monitors Pushbutton for External Override Halts and Resets an Out-of-Control Microprocessor
NV RAM Control Automatic Battery Backup and Write Protection to External SRAM
3-Channel, 8-Bit ADC
Simple 3-Wire Interface
3.3V Operation