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DS1302S The Analog Devices DS1302S is a real-time clock/calendar IC featuring 31 bytes of battery-backed RAM and a simple 3-wire serial interface. It operates from 2V to 5.5V.
Mfr Part #:

DS1302S

Available from 3 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The Analog Devices DS1302S is a real-time clock/calendar IC featuring 31 bytes of battery-backed RAM and a simple 3-wire serial interface. It operates from 2V to 5.5V.
✓ Total Stock: 72,921 pcs

DS1302S Available from 3 distributors

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Romaks Technologies ✓
Non-Authorised Inventory information
69,538 pcs
On Request
69538 pcs On Request 1 On Request On Request On Request On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
2,000 pcs
On Request
2000 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,383 pcs
On Request
1383 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

DS1302S Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Date Format
Features
Interface
Memory Size
Mounting Type
Operating Temperature
Supplier Device Package
Supplier Package
Time Format
Type
Voltage
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DS1302S Description

Short technical summary and product information.

The Analog Devices DS1302S is an integrated circuit designed for timekeeping functions. It manages all timekeeping operations, including counting seconds, minutes, hours, date, month, day of the week, and year, with leap-year compensation valid up to 2100. The device includes 31 bytes of battery-backed general-purpose RAM for data storage.

 

Interfacing with microcontrollers is simplified through a 3-wire serial interface (CE, I/O, SCLK), supporting both single-byte and burst mode data transfers. The DS1302S operates on low power, consuming less than 300nA at 2.0V, extending battery backup run time. It supports a full operating voltage range of 2.0V to 5.5V.

 

This clock/calendar IC is available in an 8-pin SOIC package, suitable for surface mounting. It operates within a temperature range of 0°C to 70°C. The DS1302S also features trickle-charge capabilities and leap year correction.

 

Key specifications include a memory size of 31 bytes, time format in HH:MM:SS (12/24 hr), and date format in YY-MM-DD-dd. The device is RoHS3 compliant and has an MSL rating of 1.

DS1302S Quick Information

Product Type: Real Time Clock
Canonical Name: DS1302S Real Time Clock/Calendar IC
Subcategory: Real Time Clocks

DS1302S Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Lead Free

DS1302S Features

  • Manages all timekeeping functions including leap year.
  • Includes 31 bytes of battery-backed RAM.
  • Simple 3-wire serial interface to microcontrollers.
  • Low power operation extends battery backup.
  • Surface mount 8-SOIC package.

DS1302S Applications

  • Ideal for embedded system timekeeping.
  • Suitable for battery-powered devices.
  • Used in data loggers and monitoring systems.
  • Applications requiring calendar functions.

DS1302S FAQs

7 frequently asked questions generated from this part’s specifications.
What are the key timekeeping functions of the DS1302S?

The DS1302S counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100.

How much battery-backed RAM does the DS1302S offer?

The DS1302S provides 31 x 8 bytes of battery-backed general-purpose RAM.

What type of interface does the DS1302S use?

The DS1302S uses a simple 3-wire serial interface.

What is the operating voltage range for the DS1302S?

The DS1302S operates from 2.0V to 5.5V.

What is the typical current consumption of the DS1302S?

The DS1302S consumes less than 300nA at 2.0V.

What is the operating temperature range for the DS1302S?

The operating temperature range for the DS1302S is 0°C to 70°C.

What package is the DS1302S available in?

The DS1302S is available in an 8-SOIC package.

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