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DS1305EN+ The Analog Devices DS1305EN+ is a serial alarm real-time clock IC featuring SPI interface and 96 bytes of NV RAM. It operates from 2V to 5.5V and has an industrial temperature range.
Mfr Part #:

DS1305EN+

Available from 2 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The Analog Devices DS1305EN+ is a serial alarm real-time clock IC featuring SPI interface and 96 bytes of NV RAM. It operates from 2V to 5.5V and has an industrial temperature range.
✓ Total Stock: 336 pcs

DS1305EN+ Available from 2 distributors

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232 pcs
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104 pcs
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104 pcs On Request 1 On Request On Request On Request On Request 2026-02-23 21:33:16
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DS1305EN+ Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
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Features
Interface
Lead Spacing
Memory Size
Mounting Type
Operating Temperature
Supplier Device Package
Temperature Range
Time Format
Type
Voltage
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DS1305EN+ Description

Short technical summary and product information.

The Analog Devices DS1305EN+ is a serial alarm real-time clock (RTC) designed for managing all timekeeping functions. It counts seconds, minutes, hours, date, month, day of the week, and year, with leap-year compensation valid up to 2100. The device includes 96 bytes of battery-backed NV RAM for data storage and two programmable time-of-day alarms.

 

This RTC supports standard serial port interfaces, including SPI modes 1 and 3, and a standard 3-wire interface, facilitating easy integration with most microcontrollers. It offers burst mode for reading and writing successive addresses in clock or RAM. The DS1305EN+ operates over a wide voltage range of 2.0V to 5.5V and features dual power supply pins for primary and backup power, along with an optional trickle charge output for the backup supply.

 

Packaged in a 20-pin TSSOP, this component minimizes required space. It is available with an optional industrial temperature range of -40°C to +85°C, making it suitable for a wide array of applications. The device is also UL recognized.

 

Key specifications include a voltage range of 2V to 5.5V, an operating current between 25.3µA and 81µA, and an industrial operating temperature range of -40°C to 85°C. The package is a 20-TSSOP with surface mount mounting type.

DS1305EN+ Quick Information

Product Type: Real Time Clock
Canonical Name: DS1305EN+ Serial Alarm Real-Time Clock
Subcategory: Real Time Clock (RTC)

DS1305EN+ Compliance

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

DS1305EN+ Features

  • Manages all timekeeping functions including year.
  • 96-byte battery-backed NV RAM for data storage.
  • Supports SPI and standard 3-wire interface.
  • Operates from 2.0V to 5.5V.
  • Available in industrial temperature range.

DS1305EN+ Applications

  • Ideal for battery-backed timekeeping.
  • Suitable for systems requiring data storage.
  • Used in applications needing alarms.
  • Supports wide operating voltage range.
  • Designed for space-constrained applications.

DS1305EN+ FAQs

6 frequently asked questions generated from this part’s specifications.
What are the main timekeeping functions of the DS1305EN+?

The DS1305EN+ 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 NV RAM is available for data storage?

The DS1305EN+ provides 96 bytes of battery-backed NV RAM for data storage.

What interface options does the DS1305EN+ support?

The DS1305EN+ supports SPI (Serial Peripheral Interface) Modes 1 and 3, or a standard 3-wire interface.

What is the operating voltage range for the DS1305EN+?

The DS1305EN+ operates from 2.0V to 5.5V.

What is the operating temperature range of the DS1305EN+?

The DS1305EN+ has an operating temperature range of -40°C to +85°C.

What package type is the DS1305EN+ available in?

The DS1305EN+ is available in a 20-TSSOP package.

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