DS3231SN# - I2C RTC with TCXO | Maxim Integrated
MPN: DS3231SN# ✓ فعالDS3231SN# نمای کلی
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.
جایگزین‌های drop-in برای DS3231SN# — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای DS3231SN# (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Product Type, RoHS Status, Square-Wave Output, Mounting Type.
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درخواست جایگزینDS3231SN# مشخصات
| 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 |
| محدوده دمای کاری | -40 °C to +85 °C |
| بسته‌بندی | 16-SOIC, 0.295 in body width, 7.50 mm |
| نوع نصب | 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 |
| وضعیت RoHS | unknown |
| REACH Status | unknown |
راهنمای پیکربندی پین DS3231SN# 16-soic, 0.295 in body width, 7.50 mm
پیکربندی پین برای DS3231SN# (پکیج 16-soic, 0.295 in body width, 7.50 mm). شماره‌گذاری پایه‌ها، عملکردها و نمودارهای اتصال در دیتاشیت سازنده تعریف شده است. برای footprint دقیق و دستورالعمل‌های لحیم‌کاری به آن مراجعه کنید.
داده پین‌آوت تفصیلی موجود نیست برای DS3231SN#.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
DS3231SN# مناسب است برای 6 کاربردs: 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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای DS3231SN# — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول |
|---|---|
| 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 |
تفاوت‌های کلیدی
- Integrated timing elements (در مقابلDS3231M)
- Wide verified supply range (در مقابلDS3232SN#)
- Package footprint (در مقابلDS3232SN#)
یادداشت‌های طراحی
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.
اطلاعات انطباق
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.
