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DS1302SN The Analog Devices DS1302SN is a real-time clock/calendar chip with 31 bytes of battery-backed RAM. It features a simple 3-wire serial interface and operates from 2V to 5.5V.
Mfr Part #:

DS1302SN

Available from 3 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The Analog Devices DS1302SN is a real-time clock/calendar chip with 31 bytes of battery-backed RAM. It features a simple 3-wire serial interface and operates from 2V to 5.5V.
✓ Total Stock: 48,738 pcs

DS1302SN 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
40,178 pcs
On Request
40178 pcs On Request 1 On Request On Request On Request On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
5,750 pcs
On Request
5750 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
2,810 pcs
On Request
2810 pcs On Request 1 On Request On Request On Request On Request On Request
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DS1302SN 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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DS1302SN Description

Short technical summary and product information.

The DS1302SN from Analog Devices is a trickle-charge timekeeping chip that manages all timekeeping functions, including seconds, minutes, hours, date, month, day of the week, and year with leap-year compensation valid up to 2100. It includes 31 bytes of battery-backed general-purpose RAM.

 

This device interfaces with microcontrollers via a simple 3-wire serial port, supporting TTL-compatible logic at 5V. Data transfer can be done in single-byte or burst modes. The DS1302SN is designed for low power consumption, drawing less than 300nA at 2.0V, which extends battery backup run time.

 

Available in an 8-pin SOIC package, the DS1302SN is suitable for applications requiring minimal board space. It supports an optional industrial temperature range of -40°C to +85°C, making it versatile for various operating environments. The chip also features dual power pins for primary and backup power supplies and a programmable trickle charger.

 

Key specifications include an operating voltage range of 2V to 5.5V and an operating temperature range of -40°C to +85°C. The interface is a 3-wire serial connection, and it offers 31 bytes of memory. The time format supports both 12-hour and 24-hour modes with an AM/PM indicator, and the date format is YY-MM-DD-dd.

DS1302SN Quick Information

Product Type: Real Time Clock
Canonical Name: DS1302SN Real-Time Clock/Calendar Chip
Subcategory: Clock/Calendar

DS1302SN Compliance

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

DS1302SN 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.
  • Available in 8-pin SOIC surface mount package.

DS1302SN Applications

  • Ideal for embedded timekeeping systems.
  • Suitable for battery-powered devices.
  • Used in industrial control applications.
  • Supports wide operating temperature range.

DS1302SN FAQs

6 frequently asked questions generated from this part’s specifications.
What are the operating voltage and current for the DS1302SN?

The DS1302SN operates from 2V to 5.5V and consumes between 0.3µA and 1µA at 2V to 5V.

What is the operating temperature range of the DS1302SN?

The operating temperature range for the DS1302SN is -40°C to +85°C.

What type of interface does the DS1302SN use?

The DS1302SN uses a simple 3-wire serial interface.

How much memory does the DS1302SN have?

The DS1302SN has 31 bytes of memory.

What is the package type for the DS1302SN?

The DS1302SN is available in an 8-SOIC package.

Does the DS1302SN support leap year compensation?

Yes, the DS1302SN manages timekeeping functions with leap-year compensation valid up to 2100.

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