DS1305 The DS1305 is a Serial Alarm Real Time Clock featuring 96 bytes of nonvolatile RAM and supporting SPI or 3-wire serial interfaces. It operates within a voltage range of 2.5V to 5.5V.
Mfr Part #:

DS1305

Available from 1 distributors
Mfr Name: Unknown
Unknown
The DS1305 is a Serial Alarm Real Time Clock featuring 96 bytes of nonvolatile RAM and supporting SPI or 3-wire serial interfaces. It operates within a voltage range of 2.5V to 5.5V.
✓ Total Stock: 13 pcs
$ Price Range: $3.00

DS1305 Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
13 pcs
13 pcs On Request 1 On Request On Request On Request On Request On Request

DS1305 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Interface
Mounting Type
Operating Temperature
Operating Voltage
RAM Size
SVHC Present

DS1305 Description

Short technical summary and product information.

The DS1305 is a Serial Alarm Real Time Clock (RTC) that provides seconds, minutes, hours, date, month, and year information with leap year compensation valid up to 2100. It includes 96 bytes of nonvolatile RAM for data storage.

 

This RTC supports both Motorola Serial Peripheral Interface (SPI) and standard 3-wire interfaces, offering flexibility in system integration. It features dual power supply pins for primary and backup power, with an optional trickle charge output for the backup supply. The device operates from 2.5V to 5.5V, with an optional full operation range of 2.0V to 5.5V.

 

Available in space-efficient 20-pin TSSOP and 16-pin DIP packages, the DS1305 is suitable for various applications requiring accurate timekeeping and data storage. An optional industrial temperature range of -40°C to +85°C is also available for demanding environments.

DS1305 Quick Information

Product Type: Real Time Clock
Canonical Name: DS1305 Serial Alarm Real Time Clock
Subcategory: Real Time Clocks

DS1305 Compliance

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

DS1305 Estimated Pricing

Qty Low High
1+ $3.00 $3.00

Estimated market price range - modelled values for guidance only, not live distributor offers.

DS1305 Features

  • Counts seconds, minutes, hours, date, month, year.
  • Includes 96 bytes of nonvolatile RAM.
  • Supports SPI and 3-wire serial interfaces.
  • Operates from 2.5V to 5.5V.
  • Features two time-of-day alarms.

DS1305 Applications

  • Accurate timekeeping for embedded systems.
  • Data logging with nonvolatile storage.
  • Alarm functions for event triggering.
  • Suitable for mixed-voltage systems.

DS1305 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the DS1305?

The DS1305 operates from 2.5V to 5.5V. An optional full operation range of 2.0V to 5.5V is also available.

What interfaces does the DS1305 support?

The DS1305 supports Motorola SPI and standard 3-wire serial interfaces.

How much RAM does the DS1305 have?

The DS1305 has 96 bytes of nonvolatile RAM for data storage.

How many alarms does the DS1305 have?

The DS1305 has two time-of-day alarms.

What crystal frequency does the DS1305 use?

The DS1305 uses a 32.768 kHz crystal.

What package options are available for the DS1305?

The DS1305 is available in TSSOP and DIP packages.

Home
Account

Categories