RTC -DS1307 1307 DIP Real Time Clock Kit – PIC AVR ARM BRAND NEW UK STOCK



The DS1307 Real Time Clock is a is a low-power, full binary-coded decimal (BCD) clock and calendar including 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The 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 AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply (usually a small coin-cell battery). Timekeeping operation continues while the part operates from the backup supply.

The DS1307 consumes only 500nA from the backup battery for timekeeping – this means even a simple coin-cell battery will last for years.

We offer two options for purchasing the DS1307:

  • Option 1: just the chip
  • Option 2: a kit containing everything you need to get started

Option 1: just the chip

This is just the chip itself – no extras! You want this option if you already have your own design, or if you need to replace an existing DS1307 chip.

Option 2: DS1307 Getting Started kit

This kit contains everything you need to get started with the DS1307 – you need to have an existing microprocessor to connect the DS1307 to – if you need a processor, why not check out our PIC kits in our buyhere22 store? Click here to learn more!

The items included in the kit are:

    • DS1307 real time clock chip – 8 pin DIP
    • 32.768kHz crystal
    • 3x 4.7k Ohm pull-up resistors
    • 100nF power filtering capacitor for the DS1307
    • CR2032 battery


Our example schematic shows how to connect the components in the kit together – then just use the three pins shown to connect the DS1307 to your processor.

If you require a pre-built operating circuit please see our other product: DS1307 based Tiny RTC.

Is programming with C confusing? No problem!

We are an authorised reseller of the OshonSoft BASIC programming tools! Take a look at our buyhere22 listing: OshonSoft programming tools.

Please read and note the following before ordering:
1) My Shipping is for UK Mainland ONLY. No Scotish Highland, Northern Ireland, Isle of Wight or other Isles. Some areas may incur additional costs, if you are unsure please contact me prior to ordering.
2) Please ensure you have a valid contact phone number, I may pass this number onto the Carrier for delivery. No refund for carriage cost will be offered, if delivery is delayed as a result of no valid contact number being provided.
3) I welcome collection for orders,please select collection on checkout otherwise your order will be despatched. Once your order has been picked and tested if applicable. We will then inform you of a date and time for collection. Please bring your payment card for verification when collecting your order. No order will be released without card verification.
4) I am unable to provide ANY technical support, please ensure you fully understand how this item works by checking for any datasheets (not provided with the item), to enable the product to be used within your application / project.
5) VERY IMPORTANT >> Do not make ANY permanent connections. Please test the item BEFORE making any permanent connections e.g. soldering to the item. Please ensure you have the means to test the item WITHOUT applying ANY solder to the item. If an item has any solder applied I will NOT accept any return.
6) When upgrading to 1st class post, (if the option is available), please note this is sent via Royal Mail and is not a guaranteed next day service. If you need a 48hr service please select 48hr delivery at extra cost. This will be sent via Royal Mail or courier. I do not offer a 24hr service. No weekend or public bank holiday deliveries.
7) We attempt to send out all orders received before 10.00am. This excludes weekends and public holidays.
8) Customers placing multiple orders. – I may ship all the orders as one, please do not ask for a refund of shipping cost after you have placed your orders. Please do not place your orders if you want a refund of shipping cost.
9) Some items may have a “Warranty Void if removed” sticker, please DO NOT tamper or remove these stickers. I will not accept any rertuns with tampered or removed sticker. Some buyers have tried to send back items that I have not supplied.

**** Important note **** Some sellers claim the stock is in the UK, please be careful, the seller is often in China and sends the item to a UK agent who then forwards the item on with a UK stamp. Check where the seller is located not just the item location. All my items are physically with me, here in the UK and I offer a quick delivery and communication within the UK.

During busy periods there maybe a delay in delivering your package by Royal Mail. I apologies in adavnce for any inconvenience but would like to point this out before you place your order.