DS1315SN-5+

Real Time Clock Overview

The DS1315SN-5+ is a Phantom Time Chip combining a CMOS real-time clock and nonvolatile memory controller in a 16-pin SO package. It tracks hundredths of seconds through years with automatic leap year correction valid to 2100. Operating at +5V within an industrial temperature range of -40°C to +85°C, it interfaces via serial bit stream pattern recognition rather than address space. The device supports battery backup for external SRAM or ROM, featuring redundant battery inputs and power-fail detection to ensure data integrity during supply transitions.

Real Time Clock Feature Summary

• Real-time clock tracking hundredths of seconds, date, and time with automatic leap year correction
• Nonvolatile controller supporting battery-backed SRAM or ROM without requiring address space
• Serial interface using 64-bit pattern recognition for secure access
• Redundant battery support (BAT1/BAT2) with automatic switching based on voltage levels

Real Time Clock Applications

• Industrial systems requiring precise timekeeping under variable power conditions
• Data logging equipment needing nonvolatile memory control alongside RTC functions
• High-reliability applications utilizing redundant battery architectures

Real Time Clock Procurement Notes

Verify the specific suffix 'SN' corresponds to the 16-pin Small Outline package and '-5+' indicates +5V operation with lead-free/RoHS compliance. Confirm the industrial temperature grade (-40°C to +85°C) matches system requirements. Ensure the ordering code aligns with the manufacturer's current revision history to avoid obsolete packaging variants.

Real Time Clock Selection Notes

Select this component when both timekeeping and nonvolatile memory management are required in a single IC. The serial interface eliminates address bus usage, saving microcontroller pins. Ensure the external crystal has a 6pF load capacitance. Verify that the host system can execute the required 64-bit write cycle sequence for pattern recognition before accessing time registers.

Real Time Clock Part Context

This part belongs to the DS1315 family of Phantom Time Chips from Analog Devices/Maxim Integrated. The 'S' denotes the 16-pin SO package, 'N' indicates the industrial temperature range, and '5' specifies the +5V operating voltage. Other variants include PDIP packages and 3.3V versions, sharing identical core functionality but differing in electrical characteristics and physical form factor.

Real Time Clock Replacement Considerations

Direct pin-compatible replacements within the same package and voltage range include other DS1315 variants such as DS1315S-5+ (commercial temp) or DS1315SN-33+ (if voltage translation is handled). Cross-family replacements require verification of serial protocol compatibility and power consumption differences.