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DS1307Z+T&R

I2C RTC，56B NV SRAM，BCD 时钟/日历，SQW 输出 1Hz-32kHz，500nA 蝙蝠备份，4.5-5.5V，SOIC-8，0~70C，T&R

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制造商零件：

DS1307Z+T&R

包装：

SOIC-8（150 密耳）（4.9 x 3.9 毫米，1.27 毫米间距）

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说明

Analog Devices（前身为 Maxim Integrated）的 DS1307Z+T&R 是一款 64 x 8 串行 I2C 实时时钟 (RTC)，带有 56 字节电池支持的 NV SRAM，采用 8 引脚 SOIC（150 密耳）封装，卷带包装。主要规格：完整的时钟/日历，可计算秒、分、小时、日、日期、月和年，闰年补偿有效期长达 2100 年；BCD 编码时间和日期寄存器；56 字节电池支持的通用 NV SRAM，可无限次写入；I2C 串行接口（仅标准模式 100 kHz）；从地址 0x68 (1101000)；可编程方波输出，频率为 1 Hz、4.096 kHz、8.191 kHz。096 kHz、8.192 kHz 或 32.768 kHz；自动电源故障检测和开关电路；振荡器运行时，备用电池电流小于 500 nA（典型值）；电源电压 4.5 V 至 5.5 V；备用电池电压 2 V 至 3.5 V（通常为 3 V 纽扣式锂电池）；工作温度 0 至 +70 摄氏度（后缀为 Z 的商业级）；UL 认证元件。后缀 Z 表示 SOIC-8 封装，+ 表示符合无铅/RoHS 标准，T 和 R 表示卷带包装。注：DigiKey 将非加号 DS1307Z/T&R 列为过时产品；加号 DS1307Z+T&R 仍可从 JLCPCB 和其他分销商处购买。.

Analog Devices（前身为 Maxim Integrated/Dallas Semiconductor）的 DS1307Z+T&R 是电子行业应用最广泛的实时时钟集成电路之一。它提供完整的 BCD 编码时钟/日历，具有自动闰年补偿功能，以及 56 字节的电池备份非易失性 SRAM，所有功能均可通过简单的 I2C 串行接口访问。.

DS1307 是经典的 Arduino RTC 芯片，被广泛使用的 DS1307 突破板模块所普及，这些模块将 DS1307 与 32.768 kHz 晶体和 CR2032 纽扣电池结合在一起。这些模块是业余爱好者和制作者项目中最常见、最经济实惠的 RTC 解决方案。.

时钟/日历功能提供秒、分、小时（12 小时制，AM/PM 或 24 小时制）、星期、日期、月份和年份。年份字段为两位数（00-99），具有自动闰年补偿功能，有效期至 2100 年。时间和日期寄存器位于寄存器映射中的地址 00h-06h。.

56 字节的 NV SRAM（地址 08h-3Fh）由电池支持，可提供无限次的读/写循环，这与写耐久性有限的 EEPROM 不同。因此，SRAM 适合存储配置数据、校准值或经常变化的日志数据。.

I2C 接口以标准模式运行（最大 100 kHz）。DS1307 始终作为从设备运行，其固定的 7 位地址为 0x68（二进制 1101000）。接口支持字节写入和突发读取操作，允许在单个 I2C 事务中读取整个时间/日期。.

电源故障自动检测和切换电路监控 VCC 电源。当 VCC 下降到电池电压 (VBAT) 以下时，设备会自动切换到电池供电，以维持计时和 SRAM 数据。振荡器运行时，备用电池电流通常小于 500 nA，这使得 CR2032 纽扣电池（220 mAh）理论上可以维持 50 年以上的计时（不过电池自放电通常会将实际寿命限制在 5-10 年）。.

可编程方波输出（SQW/OUT 引脚）可产生四种频率：1 Hz、4.096 kHz、8.192 kHz 和 32.768 kHz，由控制寄存器（地址 07h）中的 RS0 和 RS1 位控制。当方波被禁用时，输出还可用作由 OUT 位控制的简单逻辑输出。1 Hz 输出尤其适用于产生 1 秒钟的中断，用于 MCU 计时同步。.

DS1307 需要一个连接在 X1 和 X2 引脚之间的 32.768 kHz 外部晶体。晶体和相关负载电容器必须尽可能靠近集成电路，以最大限度地减少寄生电容，确保可靠振荡。DS1307 的典型负载电容为 12.5 pF。.

后缀 Z 表示 SOIC-8（150 密耳）表面贴装封装。后缀 plus 表示符合无铅/RoHS 规范。后缀 T&R 表示用于自动 SMT 组装的卷带包装。商用温度范围版本（0 至 70 摄氏度）的后缀为 Z，不带 N；工业温度范围版本（-40 至 85 摄氏度）的后缀为 ZN。.

DS1307Z+T&R 可作为带备用电池的 I2C 从站实时时钟运行，通过外部 32.768 kHz 晶体振荡器保持准确的时间和日期。.

振荡器电路：DS1307 包含一个内部振荡器电路，需要在 X1 和 X2 之间连接一个外部 32.768 kHz 音叉晶体。只要 VCC 或 VBAT 供电，振荡器就会持续运行。振荡器电路包括为晶体设计的内部负载电容，负载电容为 12.5 pF。可以通过将 CH（时钟停止）位（地址 00h 的秒寄存器第 7 位）设置为 1 来禁用振荡器；当 CH 为 0 时（上电后 VBAT 有效时的默认值），振荡器正常运行。.

时钟/日历逻辑：32.768 kHz 振荡器输出通过 15 级二进制纹波计数器向下分频，产生 1 Hz 的刻度。每个 1 Hz tick 都会使秒计数器递增。秒计数器每 60 秒滚动一次，以递增分钟，每 60 秒滚动一次，以递增小时，依此类推。当小时数从 23 翻转到 00（午夜）时，星期计数器递增。日期计数器的增量取决于月份和年份（二月自动闰年补偿）。所有时间和日期值都以 BCD（二进制十进制）格式存储在寄存器映射中。.

I2C 从接口：DS1307 作为 I2C 从设备运行，其固定的 7 位地址为 0x68（二进制 1101000）。主设备通过发送 START（开始）条件启动通信，随后发送从设备地址和一个 R/W 位。对于写操作，主站发送寄存器地址指针，然后是数据字节。对于读操作，主站首先写入寄存器地址指针，然后重复发出 START（开始），并读取数据字节。每读取一个字节后，寄存器地址指针都会自动递增，这样就能在一个脉冲串中读取整个时间/日期（7 个字节）。.

电源故障检测和开关：器件持续监控 VCC。当 VCC 低于 VBAT 加约 0.2 V 时，内部电源开关会断开 VCC 并连接 VBAT，为振荡器和 SRAM 供电。在这种电池备份模式下，I2C 接口被禁用，SQW/OUT 引脚被驱动为低电平。当 VCC 升至 VBAT 加约 0.2 V 以上时，器件切换回 VCC 电源，I2C 接口变为激活状态，SQW/OUT 引脚恢复其编程功能。这种切换是无闪烁的，不会影响计时精度。.

BCD 计时寄存器：时间和日期以 BCD 格式存储在七个寄存器（00h-06h）中。时间/日期的每一位数占用一个单独的 4 位半字节：例如，秒寄存器的第 6-4 位存储秒的十位数，第 3-0 位存储单位数。寄存器 00h 的第 7 位是 CH（时钟停止）位。寄存器 02h 的第 6 位是 12/24 小时模式选择位。在 12 小时模式下，第 5 位是 AM/PM 指示器。星期寄存器（03h）是一个从 1 到 7 的简单计数器，在午夜时递增。.

方波输出：当 SQWE 位（控制寄存器的第 4 位，位址 07h）置 1 时，SQW/OUT 引脚可产生四种频率（1 Hz、4.096 kHz、8.192 kHz、32.768 kHz）之一的方波。 频率由 RS1:RS0 位（控制寄存器的第 1:0 位）选择。当 SQWE 为 0 时，SQW/OUT 引脚输出 OUT 位（控制寄存器的第 7 位）中编程的逻辑电平。.

NV SRAM：56 字节的 NV SRAM（地址 08h-3Fh）是通用读/写存储器，在 VCC 出现故障时由备用电池维持。与 EEPROM 不同，它没有写入周期限制或写入延迟，因此适用于频繁更新的数据，如警报设置、校准值或滚动日志。.

针脚 名称 类型 说明
1 X1 振荡器 晶体输入；在 X1 和 X2 之间连接一个 32.768 kHz 的音叉晶体；晶体必须具有 12.5 pF 的负载电容；提供内部负载电容；晶体引线尽可能短（建议小于 1 英寸），以尽量减少寄生电容，确保可靠的振荡启动
2 X2 振荡器 晶体输出；32.768 kHz 晶体的互补连接；除非晶体需要与内部 12.5 pF 不同的负载电容，否则不要连接外部电容；如果振荡无法启动，请验证晶体规格和 PCB 布局
3 VBAT 电源 备用电池输入；连接 3 V 纽扣锂电池 (CR2032) 或同类电池；当 VCC 拔下时，电池可维持计时和 NV SRAM；振荡器运行时，备用电池电流通常为 500 nA；电压范围为 2 V 至 3.5 V；如果不需要备用电池，则连接至 GND
4 接地 地面 接地连接；所有信号均指向该引脚；连接至 PCB 地平面；I2C 总线接地回线；VCC 旁路电容器接地端子
5 SDA 输入/输出（I2C） I2C 串行数据输入/输出；开漏输出需要外部上拉电阻（通常为 4.7 kOhm 至 VCC）；用于 I2C 通信的双向数据线；DS1307 将 SDA 驱动为低电平以发送数据和确认；SCL 为高电平时数据有效；SDA 只能在 SCL 为低电平时发生变化（START 和 STOP 条件除外）
6 SCL 输入 (I2C) I2C 串行时钟输入；DS1307 始终是从设备，因此 SCL 只是一个输入；主设备生成时钟信号；标准模式最大 100 kHz；与外部上拉电阻器连接（通常为 4.7 kOhm 至 VCC）；DS1307 不会拉伸时钟
7 SQW/OUT 输出 方波输出或逻辑输出；当 SQWE 位为 1 时，输出 1 Hz、4.096 kHz、8.192 kHz 或 32.768 kHz（由 RS1:RS0 选择）的方波；当 SQWE 位为 0 时，输出 OUT 位的逻辑电平；仅当 VCC 有效时才激活（在电池备份模式下为低电平）；如果不使用，可以不连接
8 VCC 电源 主电源电压；4.5 V 至 5.5 V；当 VCC 有效（高于 VBAT 加 0.2 V）时，设备从 VCC 运行，I2C 接口处于激活状态；使用 100 nF 陶瓷电容器将其旁路至 GND；当 VCC 低于 VBAT 时，设备切换至电池供电，并禁用 I2C 接口
应用 说明
Arduino RTC 模块 最常见的应用；带晶体和 CR2032 电池的 DS1307 分线板；I2C 接口（SDA/SCL）直接连接到 Arduino；提供库（RTClib、DS1307RTC）；56 字节 NV SRAM 存储配置数据；SQW/OUT 引脚提供用于时间同步的 1 Hz 中断；数据记录时间戳和计划任务的理想选择
工业数据记录器 利用实时时钟对传感器读数进行时间标记；56 字节 NV SRAM 可存储上次已知的校准值；备用电池可在断电时保持时间不变；100 kHz 的 I2C 接口适合定期读取时间；BCD 格式可直接用于显示或记录；闰年补偿确保了日期的准确性
智能电表计时 为公用事业计量（电、煤气、水）提供准确的日期和时间；备用电池可在停电时保存时间；500 nA 的备用电流可将纽扣电池的寿命延长至 10 年以上；SQW/OUT 为计量间隔提供 1 Hz 的参考；NV SRAM 可存储计量配置
嵌入式系统 RTC 为没有内部 RTC 的 MCU 提供实时时钟；I2C 接口仅使用 2 个 GPIO 引脚；自动断电开关确保无缝计时；56 字节 NV SRAM 取代了用于设置的小型 EEPROM；简单的 2 线接口降低了代码复杂性；MCU 实时操作系统和驱动程序库广泛支持该功能。
访问控制时间戳 在安全系统中记录带有准确时间戳的出入事件；备用电池可在设施断电时保持时间；NV SRAM 可存储最后一次访问记录；SQW/OUT 触发定期访问日志上传；商用温度范围（0-70 C）适合室内安装
模型 制造商 兼容性 主要区别
DS1307ZN+T&R 模拟器件公司 相同设备，工业温度 相同的 DS1307，SOIC-8 封装，带卷带；工业温度范围 -40 至 +85°C；后缀 N 表示工业级；需要更高的温度时使用；相同的 I2C 协议和寄存器映射表
DS1307+ 模拟器件公司 相同器件，PDIP 封装 相同的 DS1307，采用 8 引脚 PDIP（300 密耳）通孔封装；相同的电气规格和寄存器图；用于原型开发和手工焊接；管式封装
DS3231N 模拟器件公司 更高精度替代方案 基于 TCXO 的 RTC，精度为正负 2 ppm（DS1307 的典型精度为 35 ppm）；集成晶体（无需外部晶体）；I2C 接口（也是 100 kHz，但支持 400 kHz）；两个时间报警；相同的 SOIC-8 基底面；成本较高；需要温度补偿精度时使用
PCF8563T 恩智浦 成本更低，电压更低 SOIC-8 内的 I2C RTC；1.0-5.5 V 电源（范围更宽、更低）；带闹钟和定时器的类似时钟/日历；无内部 SRAM；成本更低；400 kHz I2C；用于低电压和成本敏感型应用
MCP7940N 微型芯片 现代针脚兼容 采用 SOIC-8 或 PDIP-8 封装的 I2C RTC；引脚与 DS1307 兼容；增加了两个警报、64 字节受保护 EEPROM 和唯一 ID (EUI-48)；1.8-5.5 V 电源；相同的 I2C 地址 0x6F；建议用作新设计的 DS1307 升级版
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  • Domestic Delivery: SF Express, Yunda Express
  1. Order Processing Time
  • In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
  • Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
  1. Estimated Transit Time
  • International Express: 3 – 7 working days globally
  • Air Freight: 7 – 12 working days
  • Sea Freight: 25 – 40 working days for heavy and large bulk cargo
  1. Shipping Fee Rules
  • Shipping cost is calculated based on package weight, volume, destination and delivery method.
  • Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
  • Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
  1. Shipment Tracking
     

    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

  2. Packaging Standard

     

    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

4. Customs & Liability Statement

  1. Import Duties & Taxes

     

    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
  • In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
  • We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.

5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

Online Inquiry Form

Support Excel, PDF, CSV format files for full BOM list quotation

Submit your component procurement and custom packaging needs via the form below. We will provide a detailed quotation and professional solution within 1–8 working hours.

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