DS3231S#T&R - I2C RTC with Integrated TCXO | Analog Devices
Артикул: DS3231S#T&R ✓ АктивенDS3231S#T&R Обзор
A real-time clock is a timekeeping semiconductor that retains calendar date and time information across power interruptions. In the broader power-management and timing hierarchy, an RTC is a clock-and-timing IC that complements a microcontroller or system clock by providing a continuously accessible, battery-backed time reference. The DS3231 combines this function with an integrated TCXO and crystal, reducing the external discrete components normally required by a basic RTC design.
The principal feature of the DS3231 is its integrated temperature-compensated crystal oscillator. Temperature compensation is intended to improve oscillator behavior over its specified 0°C to +70°C temperature range, while the integrated crystal simplifies board construction and reduces the number of timing components. The device communicates through a two-wire I2C serial interface, allowing a host processor to read and write date and time registers. It also includes a battery input so timekeeping can continue when the main supply is interrupted.
The 2.3 V to 5.5 V operating range supports both lower-voltage embedded systems and conventional 5 V equipment. Its 16-pin SOIC surface-mount package is compatible with standard small-outline PCB assembly methods, and the DS3231S#T&R ordering code identifies a tape-and-reel presentation suitable for automated production. Unlike a standalone crystal oscillator, this device combines frequency reference, oscillator, RTC counter, calendar, serial interface, and backup-power handling in one package.
Typical uses include industrial automation equipment, data-acquisition systems, environmental monitoring, access-control terminals, consumer electronics, and embedded control systems that must preserve timestamps while the primary supply is unavailable. For new designs, engineers should verify the complete pinout and register map in the manufacturer datasheet, especially when connecting the battery input, I2C pull-ups, and any alarms.
This page consolidates the verified manufacturer, distributor, and cross-reference information for the DS3231S#T&R and adds engineering-oriented application guidance, sourcing context, and a transparent comparison of documented same-family alternatives.
Аналоги без доработки для DS3231S#T&R — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с DS3231S#T&R (тот же форм-фактор и посадочное место) — отличается по Device Type, Operating Temperature Range.
DS3231SN#T&R
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Открыть даташит →DS3231S#T&R Характеристики
| Device Type | I2C real-time clock and calendar with integrated TCXO and crystal |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Диапазон рабочих температур | 0°C to +70°C |
| Oscillator Type | Temperature-compensated crystal oscillator (TCXO) |
| Integrated Frequency Reference | Integrated crystal resonator |
| Serial Interface | I2C, 2-wire serial interface |
| Timekeeping Format | Date and time with day, date, month, year, hour, minute, and second registers |
| Backup Power | Integrated battery input for timekeeping during main-power interruption |
| Корпус | 16-pin SOIC, 7.50 mm width |
| Тип монтажа | Surface mount |
| Shipping Format | Tape and reel |
Руководство по цоколевке DS3231S#T&R в корпусе 16-pin soic, 7.50 mm width
Цоколевка для DS3231S#T&R (корпус 16-pin soic, 7.50 mm width). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для DS3231S#T&R.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
DS3231S#T&R подходит для 6 применениеs: Industrial Automation Controllers, Battery-Backed Data Acquisition, Environmental Monitoring Systems, Access-Control and Security Terminals, Networked Sensor Gateways, Consumer Electronics and Embedded Products.
Industrial Automation Controllers
The DS3231S#T&R fits industrial automation equipment that must preserve event, shift, and maintenance timestamps during brief main-power interruptions. Its integrated TCXO and crystal eliminate the need for a separate crystal oscillator assembly, while the 2.3 V to 5.5 V supply range supports embedded control rails. The device retains timekeeping through its battery input and exposes the calendar through the I2C interface. Its documented 0°C to +70°C range covers typical indoor factory environments. Designers should verify backup-battery endurance, pull-up values, and the complete 16-pin SOIC layout in the manufacturer datasheet before production release.
Рекомендуется
Battery-Backed Data Acquisition
The DS3231S#T&R provides a persistent time reference for data-acquisition systems where sensor records must retain accurate acquisition dates and times. Its integrated temperature-compensated crystal oscillator and crystal are useful in equipment exposed to changing ambient temperatures, while the I2C interface allows a microcontroller or programmable logic controller to read calendar registers. The battery input allows timekeeping to continue when the primary 2.3 V to 5.5 V supply disappears. For field deployments, calculate battery-life requirements from the manufacturer’s operating and backup-current figures and verify that the selected crystal and TCXO meet the required timing tolerance.
Рекомендуется
Environmental Monitoring Systems
The DS3231S#T&R is suitable for environmental monitors that log temperature, humidity, air quality, or water-level measurements with reliable timestamps. The integrated TCXO and crystal simplify the timing subsystem and support consistent calendar records without a separate oscillator. I2C connectivity allows the same bus to share the RTC with sensors and a microcontroller, subject to correct address handling and pull-up design. Its 0°C to +70°C specification applies to the RTC component and must be compared with the complete monitoring system’s environmental requirements. The 2.3 V to 5.5 V operating range also supports low-voltage and 5 V mixed-signal installations.
Рекомендуется
Access-Control and Security Terminals
The DS3231S#T&R can maintain time and date information in access-control readers, alarm panels, and electronic security terminals. The calendar registers provide a host processor with a local time reference for event logs, credential schedules, and maintenance records, while the backup-power input preserves timekeeping during supply interruptions. The integrated crystal and TCXO reduce the component count compared with a discrete RTC oscillator design. The I2C interface is suitable for a compact embedded architecture, but security products must verify RTC tamper behavior, oscillator accuracy, and backup-battery conditions against their system requirements before use.
Рекомендуется
Networked Sensor Gateways
The DS3231S#T&R is useful in networked sensor gateways that need a consistent timestamp for locally buffered measurements. A microcontroller can read the RTC over I2C, associate each sample with calendar data, and forward records through Ethernet, serial, or wireless communications hardware. The integrated TCXO and crystal reduce dependence on an external frequency reference, and the 2.3 V to 5.5 V range supports both low-voltage sensor nodes and 5 V gateway designs. Because gateway timestamps may support regulatory or service records, engineers should confirm the required accuracy against the manufacturer’s official timing characteristics rather than relying only on general descriptions of the integrated oscillator.
Рекомендуется
Consumer Electronics and Embedded Products
The DS3231S#T&R fits compact consumer and embedded products requiring a battery-backed calendar without a separate crystal oscillator assembly. Its integrated TCXO, crystal, RTC, and I2C interface simplify board area and firmware initialization compared with a microcontroller plus discrete timing components. The device can maintain a time reference during short main-power interruptions and operates across 2.3 V to 5.5 V. Its 16-pin SOIC tape-and-reel format is suitable for surface-mount production, although the documented 0°C to +70°C range is narrower than the full temperature range expected in many consumer environments. Confirm the complete electrical and environmental specifications before consumer release.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для DS3231S#T&R — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | DS3231SN#T&R |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 16-pin SOIC, 7.50 mm width | 16-pin SOIC |
| Device Type | I2C RTC with integrated TCXO and crystal | I2C RTC with integrated TCXO and crystal |
| Serial Interface | I2C, 2-wire serial interface | I2C |
| Backup Power Support | Yes, integrated battery input | Yes |
| Shipping Format | Tape and reel | Tape and reel |
Ключевые отличия
- Verified operating range for the target order code (против DS3231SN#T&R)
- Production-oriented tape-and-reel format (против DS3231SN#T&R)
- Integrated precision timing components (против DS3231SN#T&R)
Заметки по проектированию
Design the backup-power path separately from the main VCC rail. The verified data confirms a battery input and continued timekeeping during a main-power interruption, but it does not provide the required battery-current figures. Use the manufacturer datasheet to calculate backup lifetime, select the backup source, and verify the allowed battery voltage range. Do not assume that the backup battery can be charged by the DS3231 unless the official design information explicitly permits it.
Place the I2C pull-up resistors close to the bus master and route SDA and SCL away from switching nodes and high-current paths. Because the DS3231S#T&R uses a 16-pin SOIC with an integrated crystal, preserve the manufacturer-recommended layout around the oscillator and supply pins. The supplied web data confirms the 16-pin package but does not provide the detailed land pattern, so use the official Analog Devices package drawing rather than approximating dimensions from the distributor title.
Keep the DS3231 away from heat sources, regulators, inductors, and airflow obstructions that could create temperature gradients across the integrated TCXO. Although the crystal is temperature-compensated, thermal design and board placement still affect timing performance. Follow the manufacturer grounding and decoupling recommendations, provide a stable ground reference, and avoid placing the oscillator near high-temperature components in densely populated industrial or consumer products.
Do not select DS3231SN#T&R solely because both parts use a 16-pin SOIC footprint. The available cross-reference snippets establish the package and shared DS3231 function, but they do not reveal every temperature-range, qualification, or order-code difference. Compare the complete manufacturer ordering information, electrical limits, battery characteristics, and numbered pin descriptions before declaring the parts interchangeable in production.
Информация о соответствии
The supplied web results reference RoHS and REACH comparison pages but do not reproduce an explicit compliance declaration for DS3231S#T&R. Compliance fields are therefore left unknown rather than inferred.
