DS1307N

Real Time Clock Overview

The DS1307N+ is a low-power, full binary-coded decimal (BCD) serial real-time clock and calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It provides seconds, minutes, hours, day, date, month, and year information with automatic leap-year compensation valid up to the year 2100. The device features 56 bytes of battery-backed general-purpose RAM and communicates via an I2C bidirectional bus. Operating within a supply voltage range of 4.5V to 5.5V, it consumes less than 500nA in battery-backup mode with the oscillator running. The component is housed in an 8-pin DIP package and supports an industrial temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated Real-Time Clock and Calendar with BCD format output
• Automatic Leap-Year Compensation Valid Up to 2100
• 56-Byte Battery-Backed General-Purpose RAM
• I2C Serial Interface for Microcontroller Communication
• Programmable Square-Wave Output Signal (1Hz, 4kHz, 8kHz, 32kHz)
• Built-in Power-Fail Detect and Switch Circuitry

Real Time Clock Applications

• Data logging systems requiring precise timestamps
• Industrial control equipment operating in wide temperature ranges
• Consumer electronics needing continuous timekeeping during power outages
• Embedded microcontroller systems utilizing I2C communication

Real Time Clock Procurement Notes

Verify that the specific order includes the 'N' suffix to ensure the industrial temperature rating (-40°C to +85°C). Confirm RoHS compliance status as indicated by the '+' designation. Ensure the procurement source provides the official datasheet for interface timing verification. Check for availability constraints as distribution may vary by region.

Real Time Clock Selection Notes

Select the DS1307N+ when an industrial temperature range is required, distinguishing it from the commercial DS1307+. Ensure the system design accommodates the 8-pin DIP footprint. Verify that the host microcontroller supports the standard I2C mode at 100kHz. Confirm that external pull-up resistors are included in the design for SDA, SCL, and SQW/OUT lines.

Real Time Clock Part Context

The DS1307N+ belongs to the DS1307 family of serial real-time clocks produced by Maxim Integrated, now part of Analog Devices. The 'N' suffix specifically denotes the industrial temperature grade variant packaged in an 8-pin PDIP. Other variants include the commercial grade DS1307+ and surface-mount options like the DS1307Z+.

Real Time Clock Replacement Considerations

The M41ST84YMQ6E is documented as a similar replacement option. Note that the M41ST84YMQ6E is a 16-pin SOIC device with different pinout and storage capacity compared to the 8-pin DS1307N+, requiring significant schematic and layout modifications.