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 through years with automatic leap year correction valid to 2100. The device operates on +3.3V or +5V supplies within a ±10% tolerance range and supports industrial temperatures from -40°C to +85°C. Communication utilizes a unique 64-bit serial pattern recognition sequence, eliminating the need for dedicated address space. It provides battery backup switching for external SRAM or ROM interfacing without memory gaps.

Feature Summary

• Real-time clock tracking hundredths of seconds, date, and time in 12-hour or 24-hour formats
• Automatic leap year correction valid through the year 2100
• No address space required for RTC communication via 64-bit serial pattern recognition
• Nonvolatile controller supporting redundant battery attachment for high reliability

Applications

• Industrial systems requiring precise timekeeping and data retention
• Smart meters and instrumentation
• High-reliability embedded controllers needing battery-backed RAM

Procurement Notes

Verify the specific suffix 'N' indicates the industrial temperature grade (-40°C to +85°C) and '-5' denotes the 5V supply variant. Confirm RoHS compliance status based on the '+' symbol if present in the full part number. Check current availability as this component may be subject to discontinuation or limited stock constraints.

Selection Notes

Select the DS1315N-5 when an industrial temperature range is required alongside 5V operation. Ensure the system design accommodates the 64-bit serial handshake protocol for initialization. Verify that the external crystal load capacitance matches the recommended 6pF specification. Consider the PDIP-16 package dimensions for PCB layout constraints.

Part Context

The DS1315 belongs to the Maxim Integrated Phantom Time Chip family, which integrates timekeeping and memory control functions. This specific model represents the industrial-grade, 5-volt version housed in a 16-pin PDIP package. It serves as a bridge between standard CMOS memory and precise time synchronization without consuming processor address cycles.

Replacement Considerations

Direct pin-compatible replacements within the same series include the DS1315S-5+ (SO package) or DS1315EN-5+ (TSSOP package). These variants share identical electrical characteristics but differ in physical footprint. Cross-family replacements require verification of interface protocols and voltage levels.