DS1629S

Thermal Management Overview

The DS1629S is a 2-wire digital thermometer and real-time clock (RTC) in an 8-pin SO package. It measures temperatures from -55°C to +125°C with ±2.0°C typical accuracy and 9-bit resolution. The RTC counts seconds, minutes, hours, date, month, day of week, and year with leap year compensation through 2100. It features user-definable thermostatic and time alarms via an open-drain output, 32 bytes of SRAM for data storage, and operates on a 2.2V to 5.5V supply.

Thermal Management Feature Summary

• Integrates factory-calibrated temperature sensing with a binary-coded decimal real-time clock/calendar.
• Provides configurable alarm outputs triggered by thermal thresholds or specific time events.
• Includes non-volatile EEPROM registers for thermostat setpoints and volatile SRAM for general data logging.
• Communicates via a standard 2-wire serial interface requiring minimal external components.

Thermal Management Applications

• Personal computers and PDAs
• Cellular telephones
• Office equipment
• Thermal data loggers

Thermal Management Procurement Notes

Verify the specific ordering suffix when sourcing. The 'S' indicates the 8-pin SO package. The '+' suffix denotes a lead-free and RoHS-compliant manufacturing process. Ensure the required tape-and-reel quantity matches project needs if applicable. Confirm availability status as distribution may vary.

Thermal Management Selection Notes

Select this component for applications requiring combined timekeeping and thermal monitoring within a compact footprint. It is suitable for battery-powered systems due to its wide voltage range and low power requirements. Ensure the host microcontroller supports the 2-wire serial protocol and can handle the specific slave address configuration.

Thermal Management Part Context

This device belongs to the DS1629 series of integrated sensors. It combines functions typically requiring separate ICs into a single unit. The family includes variations such as tape-and-reel packaging options. It serves as a solution for space-constrained designs needing precise environmental monitoring and chronograph capabilities.

Thermal Management Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer portfolio. Verify that any substitute maintains the 2-wire interface compatibility and similar operating voltage ranges. Ensure the replacement offers equivalent alarm functionality and memory capacity if those features are critical to the design.

Thermal Management FAQ

How is high-resolution temperature calculated?

High resolution is achieved by reading the 9-bit temperature value along with the COUNT_REMAIN and COUNT_PER_C values using specific commands, then applying a calculation formula provided in the datasheet.

What is the default state of the oscillator upon power-up?

The oscillator is enabled by default (CH bit is 0), allowing the OSC pin to provide a clock signal to a microcontroller immediately after power-up.