DS3231MZ/V+T - 5ppm I2C RTC | Maxim Integrated | 8-SOIC
MPN： DS3231MZ/V+T ✓ 啟用中DS3231MZ/V+T 概覽
A real-time clock is a clock-and-calendar IC that tracks elapsed time independently of a host microcontroller. RTCs belong to the timing and clock IC category and provide timekeeping across resets, power interruptions, and low-power operating states. The DS3231MZ/V+T combines an I2C interface with a battery-backed timekeeping architecture, allowing a system to read current time through a two-wire serial bus while retaining calendar data during main-power loss.
Key features include ±5 ppm timing accuracy, temperature compensation, 400 kHz fast-mode I2C operation, an integrated battery input, and an 8-SOIC package with a 3.90 mm body width. The temperature-compensated MEMS architecture is intended to reduce sensitivity to ambient temperature changes compared with basic crystal-based RTC implementations. The I2C interface simplifies connection to microcontrollers, embedded processors, and industrial controller boards.
The DS3231MZ/V+T is designed for applications where wall-clock time is more useful than a simple counter. It can preserve timekeeping during short or extended power interruptions when a suitable backup battery is installed, allowing firmware to recover a valid date and time after restart. The 8-SOIC package also supports conventional surface-mount assembly and integration into compact embedded boards.
Typical uses include industrial control systems, access-control terminals, data loggers, environmental monitoring equipment, consumer appliances, and embedded IoT controllers. In these systems, the RTC can provide timestamps for sensor records and event logs even when the main processor resets. Design engineers should verify the battery type, backup-current budget, supply sequencing, pull-up resistors, and operating-temperature requirements for the specific system.
This page consolidates verified distributor listings, manufacturer product information, package details, and practical selection considerations for engineers evaluating the DS3231MZ/V+T. The available distributor price is listed as of 2026-10-29, while electrical values not explicitly shown in the supplied source data are marked for data completion rather than guessed.
直接替換替代品，適用於 DS3231MZ/V+T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DS3231MZ/V+T （相同外形與佔位） — 差異在於 Interface, Package, Square-Wave Output.
DS3231MZ/V+T 規格
| Device Type | Real-time clock and calendar IC |
| Timing Accuracy | ±5 ppm |
| 介面 | I2C, 2-wire serial |
| I2C Maximum Frequency | 400 kHz |
| Timekeeping Architecture | MEMS oscillator with temperature compensation |
| Backup Feature | Battery input for maintaining time during main-power interruption |
| 封裝 | 8-SOIC, 3.90 mm width |
| 安裝類型 | Surface mount |
| Supply Interface | I2C serial interface |
| Calendar Function | Clock/calendar with date information |
| Manufacturer | Maxim Integrated |
| Distributor Availability | 3,568 pieces listed in stock by Heisener |
| Listed Unit Price | $5.6080 as of 2026-10-29 |
| LCSC Listed Price | $2.2056 |
| Lead Time | To be confirmed; estimated delivery shown as Jul 20 - Jul 25 |
DS3231MZ/V+T 8-soic, 3.90 mm width 腳位配置指南
DS3231MZ/V+T（8-soic, 3.90 mm width 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： DS3231MZ/V+T.
請參閱 資料表 以查看完整腳位配置。
典型應用
DS3231MZ/V+T 適用於 6 應用s: Industrial Data Loggers, Environmental Monitoring Equipment, Access Control and Security Terminals, Connected IoT Appliances, Consumer Equipment with Calendar Functions, Battery-Backed Embedded Control.
Industrial Data Loggers
The DS3231MZ/V+T fits industrial data loggers that must timestamp sensor readings even after a controller reset or brief supply interruption. Its ±5 ppm timing accuracy supports consistent event ordering, while the battery input preserves calendar time when the main rail is unavailable. The 8-SOIC package leaves board area for storage, communications, and sensor-conditioning circuitry. The I2C interface supports up to 400 kHz, allowing the host processor to read the clock register efficiently alongside other peripheral devices. Design verification should include the backup-battery chemistry, maximum backup current, pull-up values, and the operating-temperature range required by the logger enclosure.
推薦
Environmental Monitoring Equipment
The DS3231MZ/V+T is suitable for environmental monitoring stations that record temperature, humidity, air-quality, or soil measurements on a common time axis. Temperature-compensated ±5 ppm timekeeping improves timestamp credibility compared with an uncompensated clock, particularly where records must be compared across daily or seasonal changes. Its 400 kHz I2C interface is suitable for polling the RTC from a microcontroller, and the 8-SOIC package is practical for compact field instruments. The system should reserve decoupling capacitance, define bus pull-ups, and validate whether the backup battery can sustain the required retention interval without excessive maintenance.
推薦
Access Control and Security Terminals
The DS3231MZ/V+T can support access-control terminals that need a reliable clock for credential events, audit logs, and scheduled access rules. Its battery-backed calendar maintains time during controller restarts or local power interruptions, reducing timestamp gaps when mains power is unstable. The ±5 ppm accuracy and temperature compensation support dependable event chronology, while 400 kHz I2C communication provides a simple connection to the access controller. In outdoor or security installations, engineers should verify the full environmental and battery specifications and ensure the backup source is sized for the required retention period.
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Connected IoT Appliances
The DS3231MZ/V+T is well suited to connected appliances that synchronize operating schedules, display local timestamps, or create event histories. The RTC provides an independent calendar reference while the host microcontroller handles networking, user interaction, and application logic. Its compact 8-SOIC package is easier to incorporate into compact products than larger RTC packages, and the 400 kHz I2C bus allows straightforward connection to embedded controllers. Designers should confirm the main-supply limits, startup behavior, pull-up resistor values, and backup-battery requirements before committing the PCB layout.
推薦
Consumer Equipment with Calendar Functions
The DS3231MZ/V+T provides a dependable local clock for consumer equipment such as kitchen appliances, timers, test instruments, and equipment with a display or scheduled operation. A temperature-compensated ±5 ppm reference avoids the drift associated with an ordinary unsynchronized timer, while the battery input preserves the time and calendar during mains interruptions. The I2C interface reduces wiring to two signal lines plus the required pull-ups, and the 8-SOIC package supports conventional PCB assembly. Final selection should account for backup-battery life, display update intervals, and the power rails present when the equipment starts.
推薦
Battery-Backed Embedded Control
The DS3231MZ/V+T is appropriate for embedded controllers that retain real-time information while the primary supply is removed. Battery backup supports firmware to establish a valid calendar immediately after power restoration instead of waiting for external synchronization. The 400 kHz I2C interface permits shared-bus operation with sensors and memory, while the temperature-compensated ±5 ppm oscillator supports stable records in industrial or consumer environments. Designers must calculate backup-battery capacity from the RTC retention current, confirm the battery’s permitted chemistry and voltage, and verify that the I2C pull-ups remain within valid levels during startup and shutdown.
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推薦產品摘要
工程參考資料，適用於 DS3231MZ/V+T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DS3231MZ+ | DS3231M+ |
|---|---|---|---|
| Package | 8-SOIC | 8-pin NSOIC package | DS3231M family package; exact suffix data not supplied |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Timing Accuracy | ±5 ppm | ±5 ppm | ±5 ppm |
| Interface | I2C, 2-wire serial | I2C | I2C |
| Maximum I2C Frequency | 400 kHz | 400 kHz | 400 kHz |
| Temperature Compensation | Yes | Yes | Yes |
| Battery-Backed Timekeeping | Yes | Yes | Yes |
| Timekeeping Source | Temperature-compensated MEMS oscillator | Temperature-compensated MEMS oscillator | Temperature-compensated MEMS oscillator |
主要差異化特點
- Compact 8-SOIC implementation with 3.90 mm body width (對比DS3231M+TRL)
- Fast 400 kHz I2C communication (對比DS3231M+TRL)
- Temperature-compensated ±5 ppm timekeeping (對比DS3231MZ+)
設計說明
Design the backup-power path around the complete battery-input specification in the manufacturer datasheet. The verified distributor data confirms that DS3231MZ/V+T maintains time during main-power interruption, but it does not provide the retention current or battery voltage. Calculate battery life from the actual retention current, temperature, self-discharge, and required outage duration. Confirm that the battery chemistry, charging approach, and any system power-source sharing are electrically acceptable.
Route the I2C clock and data traces as a compact, continuous pair from the RTC to the host controller, and place the required pull-up resistors near the bus master or according to the system’s rise-time budget. Keep the RTC supply decoupling capacitor close to its supply pin and provide a low-impedance ground return. Review the 400 kHz requirement against trace length, capacitance, pull-up strength, and any intervening switches before releasing the layout.
Do not treat DS3231SN# or DS3231M+TRL as automatic substitutes for this 8-SOIC device. The supplied comparison results identify DS3231M+TRL as a 16-pin WSOIC, and the available DS3231SN# comparison is not sufficient to prove exact pin compatibility. Likewise, the “+” ordering suffixes can represent temperature-grade or packaging differences. Verify the full ordering code, footprint drawing, pin names, supply limits, and backup-battery requirements before approving a substitution.
合規資訊
The supplied verified snippets do not explicitly state the target's RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.
