DS3231 / DS1307 RTC Family (12 parts in our catalog)
Maxim/Analog Devices DS3231 (TCXO) and DS1307 I2C real-time clocks. Reference parts for keeping time across power cycles, with DS3231 prized for temperature-compensated accuracy.
Sub-families
| Sub-family | Variants | Core | Max Speed | Memory | Features |
|---|---|---|---|---|---|
| ENTRY LEVEL | |||||
| DS1307N | 1 | CMOS RTC + NV SRAM | 100 kHz | — | RTC LP 5V |
| GENERAL PURPOSE | |||||
| DS1307ZN | 1 | CMOS Real-Time Clock | 100 kHz | — | RTC LP LV |
| DS1307Z | 1 | I2C Serial RTC | 100 kHz | 56B NVRAM | RTC LP LV |
| PRECISION | |||||
| DS3231SN | 2 | TCXO RTC | 400 kHz | — | PREC RTC LP AUTO |
| PRECISION MEMS RTC | |||||
| DS3231MEVKIT | 1 | mems-based cmos rtc | 400 kHz | — | PREC RTC I2C LP |
| PRECISION RTC | |||||
| DS3231S | 1 | TCXO + CMOS Logic | 400 kHz | — | PREC RTC I2C LP |
| HIGH PRECISION MEMS | |||||
| DS3231MZ | 2 | MEMS TCXO RTC | 400 kHz | — | PREC RTC LP LV |
| PRECISION MEMS | |||||
| DS3231M | 1 | I2C MEMS RTC | 400 kHz | — | PREC LP RTC MEMS |
| DS3231MZEVKIT | 1 | I2C MEMS TCXO RTC | 400 kHz | — | RTC PREC LP I2C |
| PRECISION TIMING | |||||
| DS3231MPMB1 | 1 | TCXO Integrated RTC | 400 kHz | — | PREC RTC I2C LP |
Popular Variants
Top variants from across the family, with specs that differentiate them.
| Part Number | Sub-family | Package | Type | Features | Voltage | Temp Range | Voltage - Supply, Battery | Stock |
|---|---|---|---|---|---|---|---|---|
| DS3231MEVKIT# | DS3231MEVKIT | — | Timing | — | — | — | — | 3 |
| DS1307ZN+T&R | DS1307ZN | SOIC-8 | Clock/Calendar | Leap Year, NVSRAM,.. | 4.5V | -40degC ~ 85degC | 2V | 6,900 |
| DS1307N+ | DS1307N | DIP-8 | Clock/Calendar | Leap Year, NVSRAM,.. | 4.5V | -40degC ~ 85degC | 2V | 412 |
| DS1307Z+ | DS1307Z | SOIC-8 | Clock/Calendar | Leap Year, NVSRAM,.. | 4.5V | 0degC ~ 70degC | 2V | 6,006 |
| DS3231S# | DS3231S | SOIC-16 | Clock/Calendar | Alarm, Leap Year, .. | 2.3V | 0degC ~ 70degC | 2.3V | 735 |
