DS3231SN# - I2C RTC with TCXO | Maxim Integrated
料号： DS3231SN# ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DS3231SN# 概述
A real-time clock, or RTC, is a semiconductor timing component that maintains calendar time independently of a system’s main processor. The DS3231SN# combines the RTC function with an integrated TCXO and crystal, reducing external timing-component count and helping maintain accurate timekeeping across changing temperatures. In a power-management hierarchy, it is an IC oscillator and timekeeping device rather than a power regulator or communications transceiver.
The principal verified features are the integrated TCXO and crystal, I2C clock/calendar access, 2-wire serial communication, wide 2.3 V to 5.5 V supply operation, and 16-SOIC packaging. These characteristics suit systems that need seconds, minutes, hours, calendar date, and periodic time events without relying on an external crystal. The integrated TCXO is particularly relevant when maintaining timing accuracy under ambient-temperature variation is more important than using a simple uncorrected crystal oscillator.
The DS3231SN# is designed for embedded control, embedded data logging, portable instrumentation, consumer electronics, industrial control, and access-control equipment. In these applications, the host controller reads or writes the RTC through I2C and can use time stamps for event sequencing, display synchronization, scheduled operations, or data-retention workflows. Because the verified distributor description identifies it as an I2C RTC/TCXO device, the design should include appropriate pull-up resistors and confirm the host’s I2C logic levels.
When selecting the device, verify the complete pinout and electrical limits in the manufacturer datasheet before layout release. Keep the I2C traces short, provide the required decoupling, and confirm the exact SOIC footprint and pin numbering against the PCB library. The supplied web data does not provide verified pricing tiers, detailed timing accuracy, battery-current values, alarm specifications, or absolute maximum ratings, so those values should be obtained from the manufacturer datasheet.
This page combines verified distributor information, the identified DS3231 family functionality, practical integration guidance, and explicit data gaps. It does not invent specifications that were absent from the supplied search results.
直接替换替代料： DS3231SN# ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： DS3231SN# （相同外形与封装尺寸） ——差异在于 Mounting Type, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
该产品暂无直接替换替代料。
请求替代料DS3231SN# 规格参数
| Product Type | I2C real-time clock and calendar with integrated TCXO and crystal |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Nominal Crystal Frequency | 0.0320 MHz (32.768 kHz) |
| Bus Interface | I2C, 2-wire serial |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 16-SOIC, 0.295 in body width, 7.50 mm |
| 安装类型 | Surface-mount |
| Timekeeping Function | Real-time clock and calendar |
| Oscillator | Integrated temperature-compensated crystal oscillator (TCXO) |
| Crystal | Integrated crystal |
| Communication Method | Two-wire serial interface |
| Device Classification | Clock/timing IC |
| Operating Supply | 2.3 V minimum; 5.5 V maximum |
| Temperature Coefficient Compensation | Temperature-compensated |
| Calendar Function | Supported |
| RoHS 状态 | unknown |
| REACH Status | unknown |
DS3231SN# 16-soic, 0.295 in body width, 7.50 mm 引脚配置指南
DS3231SN#（16-soic, 0.295 in body width, 7.50 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： DS3231SN#.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DS3231SN# 适用于 6 应用s: Embedded industrial timekeeping, Portable data loggers, Access-control and security equipment, Instrumentation and measurement systems, Consumer electronics scheduling, Scheduled power and process control.
Embedded industrial timekeeping
DS3231SN# fits embedded controllers that need calendar time for event logging, scheduled maintenance, and data ordering. Its verified 2.3 V to 5.5 V range supports common industrial logic rails, while the integrated TCXO and crystal reduce the number of external timing components. The host reads and writes the RTC through the two-wire I2C interface, and the -40 °C to +85 °C operating range covers many industrial environments. Before final design release, verify the complete pinout, backup-current behavior, and timing accuracy in the manufacturer datasheet.
推荐
Portable data loggers
DS3231SN# is useful in portable instruments that need a reliable calendar reference even when the main processor is reset or disconnected. The integrated TCXO and crystal can simplify a compact board by combining the oscillator and RTC in one 16-SOIC device. A host controller can timestamp samples through I2C and use the RTC for scheduled start or stop operations. The supplied data does not verify low-power current or battery-retention specifications, so those values must be checked before designing around battery life.
推荐
Access-control and security equipment
DS3231SN# can provide the time base for access-control readers, electronic locks, and audit systems that need consistent event sequencing. Its integrated TCXO and crystal are valuable when maintaining time accuracy is important across ambient changes, and the I2C interface simplifies connection to a controller board. The 2.3 V to 5.5 V supply range can align with common embedded rails. Verify backup power behavior, current consumption, and any security-specific timing requirements before production deployment.
推荐
Instrumentation and measurement systems
DS3231SN# supports instrumentation that requires repeatable calendar stamps for measurement records, calibration logs, or synchronized displays. The 32.768 kHz-related reference and integrated TCXO provide a local clock source, while I2C allows the acquisition controller to read or write time data without dedicating many pins. The verified operating range of -40 °C to +85 °C is useful for many industrial environments. Exact frequency tolerance and aging values are not supplied, so consult the manufacturer datasheet for precision requirements.
推荐
Consumer electronics scheduling
DS3231SN# can be integrated into consumer products that need date, time, and simple scheduling functions without depending continuously on a network connection. A controller can use the RTC for timers, display updates, automatic operation, and event history through I2C. The verified package is a surface-mount 16-SOIC, making it suitable for compact boards, but the footprint and pin orientation must be confirmed against the manufacturer drawing. Because the supplied data does not specify standby current or battery-life limits, those aspects require separate verification.
推荐
Scheduled power and process control
DS3231SN# can provide a local time reference for scheduled control actions, maintenance intervals, and process-event records. Its integrated TCXO and crystal make it a practical clocking component when the system must retain meaningful time information locally. The I2C bus keeps the connection compact, while the 2.3 V to 5.5 V range supports several embedded supply configurations. Use the RTC as a timing reference rather than as a safety-critical sole source unless the product’s safety requirements are independently satisfied.
推荐
推荐产品汇总
工程参考数据： DS3231SN# ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 16-SOIC, 0.295 in body width, 7.50 mm |
| Brand | Maxim Integrated |
| Function | I2C real-time clock and calendar |
| Supply Voltage | 2.3 V to 5.5 V |
| Clock Reference | Integrated TCXO and crystal; 0.0320 MHz reference identified in search data |
| Interface | I2C, 2-wire serial |
| Operating Temperature | -40 °C to +85 °C |
| Drop-In Status | Reference part |
关键差异点
- Integrated timing elements （对比 DS3231M)
- Wide verified supply range （对比 DS3232SN#)
- Package footprint （对比 DS3232SN#)
设计说明
Route the two I2C lines as a short pair from the host controller to DS3231SN#, and place the required pull-up components near the bus master or according to the system’s I2C implementation guidance. Keep switching-regulator and high-current traces away from the RTC and oscillator area. Verify the exact 16-SOIC footprint and pin-one orientation against the manufacturer package drawing before releasing the PCB.
The verified supply range is 2.3 V to 5.5 V, so the RTC rail must remain within that range during normal operation and startup. Add the manufacturer-recommended decoupling close to the supply pins and confirm how the I2C pull-up rail behaves when the main supply is removed. The supplied data does not verify standby current or battery-switchover limits, so do not infer battery performance from the operating-voltage range.
Do not substitute a same-family part based only on the DS3231 name. The supplied cross-reference results identify DS3231M as related, but exact pin and electrical equivalence was not established. Before substitution, compare every pin name, I2C address behavior, supply range, timing accuracy, temperature performance, and package outline. A 20-pin DS3232SN# is not compatible with a 16-pin DS3231SN# footprint.
Treat the I2C connections as a potentially shared bus and account for capacitance, pull-up selection, bus speed, and the number of connected devices. Place series damping only if oscilloscope measurements or the host interface guidance require it; do not add arbitrary series resistance because it can reduce timing margin. The supplied data does not include bus timing or output-level details, so use the complete manufacturer electrical characteristics for final calculations.
合规信息
The supplied web results do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than inferred.
