Component comparison · Last verified 2026-07-27
Choose DS3231S# for commercial-temperature equipment operating from 0 deg C to +70 deg C. Choose DS3231SN# when the same DS3231 functions and 16-pin wide SOIC package must be specified across -40 deg C to +85 deg C. Their interface and feature set align, but the temperature qualification and applicable accuracy range must match the product environment and approval record.
DS3231S# vs DS3231SN# specifications
| Specification | DS3231S# | DS3231SN# |
|---|---|---|
| Orderable temperature grade | Commercial | Industrial |
| Operating temperature range | 0 deg C to +70 deg C | -40 deg C to +85 deg C |
| Accuracy from 0 deg C to +40 deg C | +/-2 ppm | +/-2 ppm |
| Accuracy outside 0 deg C to +40 deg C | +/-3.5 ppm from +40 deg C to +70 deg C | +/-3.5 ppm from -40 deg C to 0 deg C and +40 deg C to +85 deg C |
| Serial interface | I2C up to 400 kHz | I2C up to 400 kHz |
| Supply voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Timebase | Integrated crystal and TCXO | Integrated crystal and TCXO |
| Time-of-day alarms | Two | Two |
| Package / case | 16-pin wide SOIC, 300 mil | 16-pin wide SOIC, 300 mil |
| Digital temperature output | +/-3 deg C accuracy | +/-3 deg C accuracy |
Key differences
The suffix selects the qualified ambient-temperature grade
DS3231S# is the commercial-temperature orderable code specified from 0 deg C to +70 deg C. DS3231SN# is the industrial-temperature code specified from -40 deg C to +85 deg C.
The full applicable accuracy range follows the selected grade
Both codes specify +/-2 ppm from 0 deg C to +40 deg C. DS3231SN# additionally carries the DS3231 accuracy specification across the industrial low and high temperature regions, while DS3231S# is bounded by its commercial range.
Qualification and procurement records still need an exact MPN
The functional interface and package are aligned, but an approved-vendor list, environmental test report or customer drawing may explicitly require one temperature grade. Treat the complete orderable code as part of the engineering requirement.
Can these parts be interchanged?
DS3231S# and DS3231SN# share the DS3231 function set, I2C interface and 16-pin wide SOIC package, but substitution should still be controlled. Verify the exact ordering code, temperature qualification, accuracy requirement across the intended ambient range, marking, current manufacturer documentation, lifecycle status and customer or regulatory approval before changing the BOM.
- Electrical ratings and operating conditions
- Package dimensions, footprint and pinout
- Interface, timing and firmware behavior
- Temperature and qualification grade
- Lifecycle status and current documentation revision
DS3231S# vs DS3231SN# FAQ
What is the main difference between DS3231S# and DS3231SN#?
The main difference is temperature grade. DS3231S# is specified from 0 deg C to +70 deg C, while DS3231SN# is specified from -40 deg C to +85 deg C.
Do DS3231S# and DS3231SN# use the same package and interface?
Yes. Both use the 16-pin, 300-mil wide SOIC package and an I2C interface up to 400 kHz, with the same core DS3231 timekeeping features.
Is the timekeeping accuracy the same for both orderable codes?
Both specify +/-2 ppm from 0 deg C to +40 deg C. DS3231SN# extends the applicable DS3231 specification across the industrial -40 deg C to +85 deg C range; always use the limits for the selected grade.
Can DS3231SN# replace DS3231S#?
The electrical function and footprint align, but do not change the BOM automatically. Confirm the exact orderable code, lifecycle, sourcing, documentation revision and qualification requirements first.
When should DS3231SN# be selected instead of DS3231S#?
Select DS3231SN# when the equipment or approval plan requires operation below 0 deg C, above +70 deg C, or an explicitly industrial-temperature RTC orderable code.
Sources and verification
- Analog Devices DS3231 product page
- Analog Devices DS3231 datasheet and ordering table
- Analog Devices DS3231 specifications
- Analog Devices DS3231 package and temperature grades
This comparison supports preliminary selection and sourcing review. Similar specifications do not establish drop-in compatibility. Confirm the complete orderable code and current manufacturer documentation before design release or purchase.
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