MAXIM INTEGRATED PRODUCTS DS1307+. 64x8, Serial, BCD Format, I2C Real Time Clock in PDIP-8 Package
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Aug 14, 2021
Phyllis Parker
How to use DS1307 Real Time Clock with Arduino code
MAXIM INTEGRATED PRODUCTS DS1307 . 64x8, Serial, BCD Format, I2C Real Time Clock in PDIP-8 Package
This article will unlock more detailed information on DS1307, a low-power clock/calendar with 56 bytes of battery-backed SRAM.
DS1307
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $5.78505 | $5.79 |
| 10+ | $5.45759 | $54.58 |
| 100+ | $5.14867 | $514.87 |
| 500+ | $4.85724 | $2428.62 |
| 1000+ | $4.5823 | $4582.3 |
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The DS1307 is a low-power clock/calendar with 56 bytes of battery-backed SRAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. It operates as a slave device on the I2 C bus.
Completely Manages All Timekeeping Functions
o Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
o 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes
o Programmable Square-Wave Output Signal
Simple Serial Port Interfaces to Most Microcontrollers
o I2C Serial Interface
Low Power Operation Extends Battery Backup Run Time
o Consumes Less than 500nA in Battery Backup Mode with Oscillator Running
o Automatic Power-Fail Detect and Switch Circuitry
8-Pin DIP and 8-Pin SO Minimizes Required Space
Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications
Underwriters Laboratories® (UL) Recognized
The block diagram from the datasheet shows the main elements of the serial RTC given below.
Maxim Integrated DS1307+ technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS1307+.
Maxim Integrated DS1307 technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS1307 .
| Product Attribute | Attribute Value | |
|---|---|---|
| Factory Lead Time | 6 Weeks | |
| Mounting Type | Through Hole | |
| Package / Case | 8-DIP (0.300, 7.62mm) | |
| Surface Mount | NO | |
| Number of Pins | 8Pins | |
| Operating Temperature | 0°C~70°C | |
| Packaging | Tube | |
| Published | 2000 | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 8Terminations | |
| ECCN Code | EAR99 | |
| Type | Clock/Calendar |
| Product Attribute | Attribute Value | |
|---|---|---|
| Terminal Finish | Matte Tin (Sn) | |
| Voltage - Supply | 4.5V~5.5V | |
| Terminal Position | DUAL | |
| Peak Reflow Temperature (Cel) | 260 | |
| Supply Voltage | 5V | |
| Terminal Pitch | 2.54mm | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Base Part Number | DS1307 | |
| Pin Count | 8 | |
| Number of Outputs | 1Output | |
| Qualification Status | Not Qualified | |
| Power Supplies | 5V | |
| Interface | I2C, 2-Wire Serial | |
| Memory Size | 56B | |
| Clock Frequency | 0.032MHz |
| Product Attribute | Attribute Value | |
|---|---|---|
| Number of Timers | 1Timer | |
| Time Format | HH:MM:SS (12/24 hr) | |
| Date Format | YY-MM-DD-dd | |
| Current - Timekeeping (Max) | 200μA @ 5V | |
| Time-Min | SECONDS | |
| Interrupt Capability | N | |
| Voltage - Supply, Battery | 2V~3.5V | |
| Volatile | YES | |
| Information Access Method | I2C | |
| Features | Leap Year, NVSRAM, Square Wave Output | |
| Length | 9.375mm | |
| Height Seated (Max) | 4.572mm | |
| Width | 7.62mm | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
· Robotics
· Gaming
· Servers
· Computer Peripherals
· GPS
· Utility power meters
A typical application circuit for the DS1307 from the DS1307 datasheet is shown below.
As you can see the IC has SCL (Serial Clock) and SDA (Serial Data) pins using which it communicates to the CPU, both these pins have to be pulled high using a resistor. The IC can be powered by providing 5V on the Vcc pin, when the power fails it will automatically switch to the battery-operated mode in which it will obtain power with Lithium cell connected to pin Vbat and ground.
The pins X1 and X2 are used to connect the crystal oscillator; typically a 32.7KHz Quartz crystal is used. The SQW pin is used to provide a PWM square wave of programmable frequencies in the range of 1Hz, 4KHz, 8KHZ or 32KHz. This pin also requires a pull-up resistor. Data between the CPU and RTC IC is exchanged only through the I2C protocol. Both Read and write happens through this communication. The IC can provide details like Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100.
Count on Maxim Integrated to help you overcome design and architectural challenges, with integrated solutions for the industrial, medical, consumer, automotive, energy, computing, and communications realms. Maxim Integrated is also your source for power, interface, and even digital products that work in the analogue world. And they’re glad to support you with reference designs, tools, technical documents, packaging, and more. We invite you to explore their latest analogue integration offerings.
Download datasheets and manufacturer documentation for Maxim Integrated DS1307+.
Download datasheets and manufacturer documentation for DS1307
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