DS3232S#T&R

Real Time Clock Overview

The DS3232S#T&R is a low-cost temperature-compensated crystal oscillator (TCXO) with an integrated real-time clock (RTC) and 236 bytes of battery-backed SRAM. It maintains seconds, minutes, hours, day, date, month, and year information with automatic leap-year compensation valid up to 2099. The device operates on a supply voltage range of 2.3V to 5.5V, with active supply current typically at 200µA (at 3.3V) and standby current at 120µA (at 3.3V). It features a fast 400kHz I²C interface, two programmable alarms, and a programmable square-wave output.

Real Time Clock Feature Summary

• Accuracy of ±2ppm from 0°C to +40°C and ±3.5ppm from -40°C to +85°C
• Integrated TCXO eliminates external crystal requirements
• 236 bytes of battery-backed general-purpose SRAM
• Power-fail detection circuit with RST pin output

Real Time Clock Applications

• Servers
• Utility Power Meters
• Telematics
• GPS Systems

Real Time Clock Procurement Notes

Verify the RoHS compliance status and lead finish specifications against the latest manufacturer documentation before procurement. Confirm that the ordering suffix corresponds to the required tape-and-reel packaging format for automated assembly processes.

Real Time Clock Selection Notes

Select this component when high long-term accuracy without external crystals is required. Ensure the design supports the 2.3V to 5.5V operating range. Consider the industrial temperature variant if operation below 0°C is necessary, as the commercial version is limited to 0°C to +70°C.

Real Time Clock Part Context

This part belongs to the DS3232 family of extremely accurate I²C RTCs. It shares functional similarities with the DS3231 but includes additional integrated SRAM. The 'SN' designation indicates the industrial temperature range (-40°C to +85°C), while the '#' denotes RoHS compliance.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.