DS2415P+T&R

Real Time Clock Overview

The DS2415P+T&R is a 1-Wire real-time clock and calendar chip featuring a unique 64-bit lasered ROM. It operates on a single data line with a communication rate of 16.3 kbps. The device includes a binary counter providing second-resolution timekeeping, accumulating up to 136 years before rollover. It functions within a voltage range of 2.5V to 5.5V and maintains low power consumption, typically drawing 200nA with the oscillator active. The component utilizes an external 32.768kHz quartz crystal connected to X1 and X2 pins for precise timing.

Real Time Clock Feature Summary

• 1-Wire MicroLAN interface with 16.3 kbps data rate
• Unique 64-bit factory-lasered registration number (8-bit family code + 48-bit serial number + 8-bit CRC)
• Real-time clock with ±2 minutes per month accuracy at 25°C
• Low power operation: 200nA typical current with oscillator running

Real Time Clock Applications

• Calendar, time, and date stamping in electronic devices
• Logbook functionality for embedded applications
• Stand-alone timekeeping using backup energy sources

Real Time Clock Procurement Notes

Verify the specific ordering suffix '+T&R' corresponds to the tape and reel packaging configuration as defined in the manufacturer's ordering information. Confirm that the required external components, specifically the 32.768kHz quartz crystal with 6pF load capacitance, are included in the system design. Ensure the bus master supports the standard 1-Wire initialization and ROM command protocols prior to accessing clock functions.

Real Time Clock Selection Notes

Select this component when a simple, low-pin-count solution for timekeeping is required. The DS2415 provides nonvolatile time storage via a backup source connected to VBAT. Designers must account for the need for an external crystal and guard rings around high-impedance nodes X1 and X2 to prevent interference. The device is suitable for multidrop systems where addressability via the 64-bit ROM is necessary.

Real Time Clock Part Context

The DS2415 belongs to the Maxim Integrated 1-Wire product family, designed for minimal hardware integration. It shares the same binary time/date representation as the DS2404 but offers 1-second resolution. The device relies on the 1-Wire protocol hierarchy, requiring successful ROM function execution before clock commands become accessible. It is housed in a compact 6-pin TSOC surface-mount package.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing this component, ensure the new device supports the 1-Wire protocol, accepts a 32.768kHz external crystal, and matches the 2.5V to 5.5V operating voltage range.