DS1315E-5+

Real Time Clock Overview

The DS1315E-5+ is a CMOS Phantom Time Chip combining a 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 the commercial temperature range of 0°C to +70°C. It utilizes a serial interface requiring no address space for communication. The integrated controller manages battery backup switching between VCC and external batteries to power an external CMOS SRAM.

Real Time Clock Feature Summary

• Phantom Time Chip architecture using 64-bit pattern recognition for serial access without dedicated address lines
• Integrated nonvolatile controller supporting redundant battery attachment for high-reliability applications
• Automatic leap year correction valid up to the year 2100
• Supports both 12-hour (with AM/PM indicator) and 24-hour time formats

Real Time Clock Applications

• Portable system controllers requiring precise timekeeping
• Battery-backed nonvolatile RAM systems
• High-reliability industrial equipment with redundant power sources

Real Time Clock Procurement Notes

Verify that the specific application requires the commercial temperature grade (0°C to +70°C). If operation in colder environments is necessary, select the industrial variant DS1315EN-5+. Confirm the design uses a +5V logic level, as this part does not support 3.3V operation.

Real Time Clock Selection Notes

Select this component when a serial RTC interface is preferred over I2C or SPI protocols. Ensure the host microcontroller can generate the required 64-bit write cycle sequence for pattern recognition. Verify that the external SRAM voltage requirements align with the VCCO output capabilities.

Real Time Clock Part Context

This part belongs to the DS1315 family of Phantom Time Chips. The 'E' suffix indicates the 20-pin TSSOP package, while the 'N' suffix denotes the industrial temperature range (-40°C to +85°C). The '+5' designation specifies the +5V operating voltage requirement.

Real Time Clock Replacement Considerations

For industrial temperature requirements, use DS1315EN-5+. For 3.3V operation, use DS1315E-33+ or DS1315EN-33+. Physical pinouts are identical across these variants.