DS1307Z+ - 64 x 8 I2C RTC with 56B SRAM | Analog Devices
料号： DS1307Z+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.39 | $2.39 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DS1307Z+ 概述
A serial real-time clock is a clock-and-calendar integrated circuit that maintains wall-clock time independently of a processor. The DS1307Z+ belongs to the broader timekeeping and real-time-clock hierarchy, using a two-wire I2C bus to transfer addresses and data between the host controller and the RTC. Its 56-byte NV SRAM provides small nonvolatile storage alongside the calendar registers.
The principal features include a 5 V supply application, 8-pin SOIC packaging, two-wire serial communication, 64 x 8 register organization, 56 bytes of battery-backed RAM, and automatic end-of-month date adjustment. The clock/calendar also includes programmable square-wave output capability according to the device documentation. The SOIC package is suitable for conventional surface-mount PCB assembly.
The DS1307 architecture separates timekeeping from the host processor, allowing a microcontroller to read and write calendar data over I2C while the RTC continues counting from its external crystal timebase. The backup battery supplies the RTC and SRAM when the primary supply is removed. Applications should account for the device's 5 V operating context, crystal selection, pull-up requirements, and battery-backup implementation when laying out the board.
Typical applications include industrial control panels, data loggers, embedded instruments, access-control terminals, and battery-backed embedded systems. The device is particularly useful when the system needs date and time persistence without maintaining a software clock during a complete power interruption. For designs using another RTC with a different pinout or supply requirement, compatibility must be verified rather than assumed.
When laying out the PCB, keep the I2C traces short, provide the required bus pull-ups, place the crystal close to the device, and separate noisy switching or high-current paths from the timekeeping network. Verify the backup-battery circuit, initialization sequence, calendar limits, and square-wave configuration in firmware. This page combines verified manufacturer and distributor information with practical RTC design guidance.
The DS1307Z+ is specifically identified by Analog Devices/Maxim Integrated as an 8-SOIC, 0.154-inch-width, 3.90 mm-width real-time clock. The verified distributor results list the part as a 56-byte I2C clock/calendar device with a list price starting from $2.39 on the manufacturer product page.
直接替换替代料： DS1307Z+ ——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： DS1307Z+ （相同外形与封装尺寸） ——差异在于 Package, Mounting Type, Calendar Functions, Interface, Leap-Year Compensation.
快速对比工具——选择替代料号进行并排对比：
DS1307ZN+
✅ 直接替换📋 参考替代料（不在目录中）
DS1307Z
✅ 直接替换📋 参考替代料（不在目录中）
DS1307Z+T&R
✅ 直接替换📋 参考替代料（不在目录中）
DS1307ZN+T&R
✅ 直接替换📋 参考替代料（不在目录中）
DS1307Z/T
✅ 直接替换📋 参考替代料（不在目录中）
DS1307Z+ 规格参数
| Product Type | Serial real-time clock and calendar |
| Register Organization | 64 x 8 bits |
| Nonvolatile SRAM | 56 bytes |
| 接口 | Two-wire I2C serial interface |
| Clock Format | Binary-coded decimal (BCD) |
| Calendar Functions | Seconds, minutes, hours, date, day, month, and year |
| Leap-Year Compensation | Valid through 2100 |
| Supply Voltage Context | 5 V application |
| 封装 | 8-SOIC |
| Package Width | 0.154 inch / 3.90 mm |
| 安装类型 | Surface mount |
| Square-Wave Output | Programmable output |
| Backup Function | Battery-backed RTC and SRAM |
| End-of-Month Adjustment | Automatic for months with fewer than 31 days |
| Data Transfer | Serial address and data transfer |
| Manufacturer | Analog Devices / Maxim Integrated |
| 生命周期状态 | Production |
DS1307Z+ 0.154 inch / 3.90 mm 引脚配置指南
DS1307Z+（0.154 inch / 3.90 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： DS1307Z+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DS1307Z+ 适用于 6 应用s: Industrial Data Loggers, Battery-Backed Access-Control Terminals, Embedded Measurement Instruments, IoT Sensor Nodes, Remote Monitoring Equipment, Battery-Powered Consumer Electronics.
Industrial Data Loggers
DS1307Z+ fits an industrial data logger that must retain timestamps and a small amount of state across power interruptions. The 64 x 8 register organization, 56-byte battery-backed NV SRAM, and I2C interface allow the host controller to read calendar data and store compact metadata without relying on a software clock during main-supply loss. Its 8-SOIC package is practical for compact controller boards, while the 5 V application context should be matched to the surrounding electronics.
推荐
Battery-Backed Access-Control Terminals
DS1307Z+ is suitable for access-control terminals where audit events must retain accurate date and time during a power interruption. The RTC stores seconds, minutes, hours, date, day, month, and year, while the 56-byte SRAM can hold compact configuration or recent-event data. The I2C bus connects the RTC to a host processor, and the SOIC package supports standard surface-mount assembly. Firmware should handle initialization, register locking behavior, and battery replacement conditions.
推荐
Embedded Measurement Instruments
DS1307Z+ can timestamp measurements in a compact laboratory or field instrument. The host processor reads the BCD calendar registers over I2C and associates each sample with seconds, minutes, hours, date, day, month, and year. Automatic end-of-month adjustment and leap-year compensation valid through 2100 reduce calendar-maintenance work in long-running deployments. The 56-byte battery-backed RAM also provides a small persistent area for calibration flags or operating counters.
推荐
IoT Sensor Nodes
DS1307Z+ is appropriate for IoT sensor nodes that need local timekeeping but do not maintain a continuously powered network connection. The host can synchronize its own software clock to the RTC after startup and use the 56-byte NV SRAM for a small amount of persistent node state. Battery backup helps preserve calendar information through short supply interruptions. Designers should confirm the backup-battery current, crystal layout, and I2C pull-up values against the official datasheet.
推荐
Remote Monitoring Equipment
DS1307Z+ helps remote monitoring equipment retain a trustworthy event time when telemetry is recorded offline or the main supply is interrupted. Its I2C interface allows a microcontroller or communications controller to read and write calendar registers over two wires, reducing the pin count compared with a parallel RTC. The 56-byte NV SRAM can retain a small counter or configuration snapshot. The design should provide a stable crystal timebase and follow the manufacturer’s backup-battery layout guidance.
推荐
Battery-Powered Consumer Electronics
DS1307Z+ can support consumer products that display date and time and need basic persistence when the primary supply is removed. Its low-power serial RTC architecture is suited to embedded products with an I2C host, while the BCD calendar registers simplify access for common controller firmware. The 56-byte SRAM offers limited nonvolatile storage rather than a general-purpose data logger. Package, temperature, battery-life, and supply requirements should be validated against the complete manufacturer documentation.
推荐
推荐产品汇总
工程参考数据： DS1307Z+ ——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 | DS1307ZN+ | DS1307Z | DS1307Z+T&R | DS1307ZN+T&R | DS1307Z/T |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Analog Devices / Maxim Integrated | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Function | 64 x 8 serial real-time clock with 56-byte NV SRAM | 64 x 8 serial real-time clock with 56-byte NV SRAM | DS1307Z real-time clock family | DS1307Z family; ordering configuration differs | DS1307 family; ordering configuration differs | DS1307Z family; ordering configuration differs |
| Interface | Two-wire I2C | Two-wire I2C | Two-wire I2C | Two-wire I2C | Two-wire I2C | Two-wire I2C |
| Register Organization | 64 x 8 | 64 x 8 | 64 x 8 | 64 x 8 | 64 x 8 | 64 x 8 |
| Calendar Functions | Seconds, minutes, hours, date, day, month, year | Seconds, minutes, hours, date, day, month, year | DS1307Z family calendar functions | DS1307Z family calendar functions | DS1307 family calendar functions | DS1307Z family calendar functions |
| Leap-Year Compensation | Valid through 2100 | Valid through 2100 | DS1307Z family documentation | DS1307Z family documentation | DS1307 family documentation | DS1307Z family documentation |
| Supply Context | 5 V application | 5 V application | 5 V application | 5 V application | 5 V application | 5 V application |
关键差异点
- Integrated battery-backed memory （对比 DS1307N+)
- Surface-mount package （对比 DS1307N+)
- Calendar-focused integration （对比 DS1302Z)
- Same-family ordering flexibility （对比 DS1307ZN+T&R)
设计说明
Place the RTC crystal and its associated load components close to the DS1307Z+ oscillator pins and keep the clock loop compact. Route the I2C SDA and SCL traces away from switching nodes, high-current inductor paths, and noisy analog inputs. The verified data confirms a two-wire I2C interface, but the exact pull-up resistor values and crystal load requirements should be taken from the manufacturer datasheet.
Design the backup-battery path so the RTC and its 56 bytes of NV SRAM can retain time and data when the primary 5 V supply is absent. Confirm the battery type, polarity, current consumption, and charging or isolation arrangement against the official DS1307 documentation. Do not assume that the backup battery is rechargeable or that the main supply can be tied directly to the backup source.
Initialize the calendar and control registers explicitly after power-up, and verify the oscillator has stabilized before reading time. The DS1307Z+ provides automatic month-end adjustment and leap-year compensation valid through 2100, but incorrect register writes can still produce invalid time values. Firmware should also account for the device address, register pointer behavior, and any write-protection or control-register settings documented by the manufacturer.
Use an 8-SOIC land pattern matching the DS1307Z+ package and preserve adequate clearance around the battery and crystal area. Keep the RTC's local supply decoupling close to the device and provide clean grounding for the I2C bus. Since the verified material confirms the 8-SOIC case but not the complete footprint drawing, the final land pattern must be checked against the official mechanical drawing.
The DS1307Z+ is a low-power clock/calendar rather than a high-power regulator or power semiconductor, so SOA data is not applicable. Nevertheless, keep the backup-battery area and local supply components within their manufacturer-recommended temperature and layout conditions. Validate battery endurance using the actual system load, backup current, and environmental temperature rather than relying on a generic RTC estimate.
合规信息
The supplied verified web data confirms the Analog Devices production product page and distributor listings but does not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. No compliance status should be inferred from the manufacturer name.
