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DS1302

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Trickle Charge Timekeeping Chip

Manufacturer : Maxim Integrated
Package/Case : DIP-8
Product Categories : Real-time clock control, time keeping
Datasheet: DS1302 Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 32799

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DS1302 Product Details

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.
Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1μW. The DS1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the DS1202, the DS1302 has the additional features of dual power pins for primary and backup power supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.

DS1302

Feature

  • Completely Manages All Timekeeping Functions
    • 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
    • 31 x 8 Battery-Backed General-Purpose RAM
  • Simple Serial Port Interfaces to Most Microcontrollers
    • Simple 3-Wire Interface
    • TTL-Compatible (VCC = 5V)
    • Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data
  • Low Power Operation Extends Battery Backup Run Time
    • 2.0V to 5.5V Full Operation
    • Uses Less Than 300nA at 2.0V
  • 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

DS1302 Products

DS1302 Block Diagram
(Picture: Diagram)

Technical Parameters

  • Function
  • Clock, Calendar, Trickle Charger, NV Timekeeping RAM
  • RTC Bus Interface
  • Serial
  • Time Format
  • HH:MM:SS
  • RTC Memory Size
  • 31 B
  • Supply Voltage Max
  • 5.5 V
  • Supply Voltage Min
  • 2 V
  • Maximum Operating Temperature
  • + 70 C
  • Minimum Operating Temperature
  • 0 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • PDIP N
  • Packaging
  • Tube
  • Battery Backup Switching
  • Yes
  • Series
  • DS1302
  • Part # Aliases
  • 90-13020-000

DS1302 Datasheet

DS1302 Equivalent Parts

For the DS1302 component, you may consider these replacement and alternative parts.

Models Manufacturer Package/Case Description
DS1307 MAXIM DIP-8 Real Time Clock 64x8 Serial I2C RTC
DS3231 MAXIM SOP-16 Extremely Accurate I2C-Integrated RTC-TCXO-Crystal

DS1302 Related Products

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Estimated Delivery Time: May 25 - May 30 days (choose Expedited at checkout).

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Packing

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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

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Guarantees

1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.

FAQ:

Q: How does Jotrin guarantee that DS1302 is the original manufacturer or agent of MAXIM?
We have a professional business development department to strictly test and verify the qualifications of MAXIM original manufacturers and agents. All MAXIM suppliers must pass the qualification review before they can publish their DS1302 devices; we pay more attention to the channels and quality of DS1302 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of DS1302 chips? Including MAXIM original factory information, Real-time clock control, time keeping application, DS1302 pictures?
You can use Jotrin's intelligent search engine, or filter by Timekeeping & Real-Time Clocks category, or find it through Maxim Integrated Information page.
Q: Are the MAXIM's DS1302 price and stock displayed on the platform accurate?
The MAXIM's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for DS1302, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
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Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of DS1302?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the DS1302 we delivered, we will accept the replacement or return of the DS1302 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of DS1302.
(3)The DS1302 is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as DS1302 datasheet pdf, DS1302 pin diagram?
Need any After-Sales service, please feel free contact us: sales@jotrin.com

Maxim Integrated

Maxim
Maxim Integrated Products is a global range of linearity, mixed-signal integrated circuits (IC) design, R & D and manufacturing leader, has designed, developed, and manufactured analog, mixed-signal, high-frequency, and digital circuits that enable all four of these key interactions....
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