DS2417X

Real Time Clock Overview

The DS2417X is a Real-Time Clock (RTC) integrated circuit utilizing the 1-Wire serial interface. It features a 32-bit binary counter that increments every second, providing timekeeping capabilities for up to 136 years before overflow. The device includes a unique 64-bit laser ROM containing a family code, serial number, and CRC. It operates within a supply voltage range of 2.2 V to 6 V and supports an operating temperature range from -40°C to +85°C. The component is housed in a TSOC-6 surface-mount package.

Real Time Clock Feature Summary

• 1-Wire Serial Interface: Single-data-line communication with open-drain mode.
• Integrated RTC: 32-bit binary counter tracking seconds since a user-defined reference point.
• Unique Identification: 64-bit laser-programmed ROM with CRC verification.
• Interrupt Capability: Open-drain interrupt pin for event signaling.

Real Time Clock Applications

• Data logging systems requiring timestamping.
• Industrial monitoring devices with limited I/O pins.
• Battery-powered embedded systems needing low-power timekeeping.

Real Time Clock Procurement Notes

Verify the specific suffix designation (e.g., P+) as the base model DS2417X may refer to the general family. Confirm availability status through authorized distributors, as some variants may have restricted supply or discontinuation notices. Ensure the selected package matches the TSOC-6 form factor required by the PCB layout.

Real Time Clock Selection Notes

Select this component when a microcontroller lacks a dedicated hardware RTC or requires minimal wiring complexity. The 1-Wire interface reduces pin count but necessitates precise timing control for communication. Ensure the external 32.768 kHz crystal meets load capacitance specifications (typically 6 pF) for accurate frequency stability across the specified temperature range.

Real Time Clock Part Context

The DS2417 series belongs to the Maxim Integrated (now Analog Devices) 1-Wire product line. It is designed to provide timekeeping functionality in systems where standard buses like I2C or SPI are unavailable or undesirable due to pin constraints. The device complements other 1-Wire components such as temperature sensors and EEPROMs on the same bus.

Real Time Clock FAQ

How is the time represented in the DS2417?

Time is stored as a 32-bit binary counter representing the number of seconds elapsed since a user-defined reference date, such as January 1, 1970.

What is the function of the X1 and X2 pins?

Pins X1 and X2 connect to an external 32.768 kHz quartz crystal oscillator, which provides the clock source for the internal real-time counter.

Can the DS2417 be powered via the data line?

Yes, the 1-Wire protocol supports parasite power, allowing the device to draw energy from the data line during high states, though external VDD connection is recommended for stable operation.