DS1643P Overview
19-5058; Rev 5/10 .. DS1643/DS1643P Nonvolatile Timekeeping RAMs .maxim-ic. FEATURES Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations. Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power Access Times of 85ns and 100ns BCD-Coded Year, Month, Date, Day,...
DS1643P Key Features
- Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source
- Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations
- Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
- Access Times of 85ns and 100ns
- BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year pensation Valid Up to 2100
- Power-Fail Write Protection Allows for ±10% VCC Power Supply Tolerance
- Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
- DS1643 Only (DIP Module) Standard JEDEC Byte-Wide 8K x 8 RAM Pinout
- UL Recognized
- DS1643P Only (PowerCap Module Board) Surface Mountable Package for Direct Connection to PowerCap Containing Battery and