DS3231 Extremely Accurate I2C Integrated RTC/TCXO/Crystal
Extremely Accurate I2C-Integrated RTC/TCXO/Crystal SOIC-16
Aliase:DS3231, High Precision RTC
DIP-16 Top View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | 32KHZ | Digital | 32.768 kHz Open-Drain Clock Output |
| 2 | VCC | Power | Positive Power Supply |
| 3 | INT/SQW | Digital | ~INT — Alarm Interrupt Output (Active Low, open-drain; fires when Alarm 1 or Alarm 2 matches time registers)SQW — Square Wave Output (programmable: 1Hz, 1.024kHz, 4.096kHz, or 8.192kHz; selected via control register) |
| 4 | RST | Digital | Reset Input / Power-Fail Output — Active Low; can also act as open-drain power-fail indicator output |
| 5 | GND | Ground | System Ground (0V) |
| 6 | GND | Ground | System Ground (0V) |
| 7 | GND | Ground | System Ground (0V) |
| 8 | GND | Ground | System Ground (0V) |
| 9 | GND | Ground | System Ground (0V) |
| 10 | GND | Ground | System Ground (0V) |
| 11 | GND | Ground | System Ground (0V) |
| 12 | GND | Ground | System Ground (0V) |
| 13 | GND | Ground | System Ground (0V) |
| 14 | VBAT | Power | Backup Battery Input |
| 15 | SDA | Digital | I2C Serial Data Line (requires 4.7kΩ pull-up to VCC; address fixed at 0x68) |
| 16 | SCL | Digital | I2C Serial Clock Line (max 400kHz) |