| DS1642 Features | - Integrated NV SRAM, real-time clock, crystal, power-fail control circuitry, and lithium energy cell
- Tracks BCD-coded seconds, minutes, hours, days, dates, months, years, and leap years, valid to year 2100
- Clock and RAM registers accessed identically
- Standard JEDEC bytewide 2k x 8 static RAM pin-out
- Clock accuracy better than ±1 min/month at 25°C
- Voltage/power-fail tolerance: 5V ±10%
- Operating range: 0°C to 70°C
- >10 years operation without system power
- Freshness seal (lithium disconnected until first power-up)
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