DS1315N-5+

Overview

The DS1315N-5+ is a Phantom Time Chip combining a CMOS real-time clock and nonvolatile memory controller. It tracks hundredths of seconds, time, date, and year with automatic leap year correction valid to 2100. The device operates on a single +5V supply (4.5V to 5.5V) within an industrial temperature range of -40°C to +85°C. Communication uses a serial bit stream pattern recognition protocol requiring 64 consecutive write cycles for access. It supports battery backup for external SRAM via redundant BAT1/BAT2 inputs and provides power-fail detection with write protection.

Feature Summary

• Phantom Time Chip interface using 64-bit serial pattern recognition without address space requirements
• Automatic leap year correction valid through the year 2100
• Nonvolatile controller supporting redundant battery attachment for high-reliability applications
• Industrial temperature range (-40°C to +85°C) with +5V operation

Applications

• Systems requiring precise timekeeping with nonvolatile RAM backup
• High-reliability applications utilizing redundant battery configurations
• Embedded controllers interfacing with CMOS static RAM or ROM

Procurement Notes

Verify the 'N' suffix indicates the industrial temperature grade (-40°C to +85°C). Confirm the '+'' denotes lead-free/RoHS compliance. Ensure the system design accommodates the specific 64-bit serial pattern recognition sequence required for register access.

Selection Notes

Select this part for +5V logic systems requiring phantom clock functionality. Compare against DS1315-5+ if commercial temperature range (0°C to +70°C) suffices. Verify compatibility with external SRAM voltage levels and ensure crystal load capacitance matches the specified 6pF requirement.

Part Context

The DS1315N-5+ belongs to the DS1315 family of Phantom Time Chips. It shares functional characteristics with variants like DS1315S-5+ but differs in package type (PDIP vs SO) and temperature rating. The 'N' suffix specifically identifies the industrial grade version within the PDIP-16 package lineup.

Replacement Considerations

DS1315-5+ offers identical electrical performance in the commercial temperature range (0°C to +70°C). DS1315SN-5+ provides the same industrial temperature rating in a 16-pin SO package.