DS1251W-120IND The DS1251W-120IND is a 512K NV SRAM with an integrated real-time clock from Analog Devices / Maxim Integrated. It supports Leap Year compensation and operates over a wide temperature range.
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DS1251W-120IND

Available from 1 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The DS1251W-120IND is a 512K NV SRAM with an integrated real-time clock from Analog Devices / Maxim Integrated. It supports Leap Year compensation and operates over a wide temperature range.
✓ Total Stock: 100 pcs

DS1251W-120IND Available from 1 distributor

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DS1251W-120IND Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
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Features
Interface
Memory Size
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Operating Temperature
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Time Format
Type
Voltage

DS1251W-120IND Description

Short technical summary and product information.

The Analog Devices / Maxim Integrated DS1251W-120IND is a 4096K (512K x 8 bit) Non-Volatile Static RAM (NV SRAM) with a built-in real-time clock. This component is designed to directly replace volatile static RAM or EEPROM, offering embedded lithium energy cell backup to maintain calendar operation and retain RAM data.

 

Key features include automatic leap year compensation valid up to 2100 and over 10 years of data retention in the absence of power. The device operates within a voltage range of 2.97V to 3.63V and a temperature range of -40°C to 85°C. It utilizes a parallel interface and is supplied in a 32-pin DIP module package suitable for through-hole mounting.

 

This phantom clock module is transparent to RAM operation, ensuring seamless integration into existing designs. The embedded energy source is electrically disconnected to retain freshness until power is applied for the first time, and it is designed for long-term reliability.

DS1251W-120IND Quick Information

Product Type: Real Time Clock
Canonical Name: Analog Devices / Maxim Integrated DS1251W-120IND NV SRAM with Phantom Clock
Subcategory: Phantom Time Chip

DS1251W-120IND Compliance

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

DS1251W-120IND Features

  • 512K NV SRAM with integrated real-time clock.
  • Maintains calendar and RAM data without power.
  • Automatic leap year compensation valid to 2100.
  • Over 10 years of data retention without power.
  • Operates from -40°C to 85°C.

DS1251W-120IND Applications

  • Ideal for systems requiring persistent timekeeping.
  • Suitable for data logging applications.
  • Used in embedded systems with power constraints.
  • Provides reliable calendar functions.

DS1251W-120IND FAQs

6 frequently asked questions generated from this part’s specifications.
What is the memory size of the DS1251W-120IND?

The DS1251W-120IND has a memory size of 512KB.

What is the operating voltage range for the DS1251W-120IND?

The operating voltage range is 2.97V to 3.63V.

What is the operating temperature range of the DS1251W-120IND?

The operating temperature range is -40°C to 85°C.

What type of component is the DS1251W-120IND?

The DS1251W-120IND is a Phantom Time Chip.

Does the DS1251W-120IND support leap year compensation?

Yes, it features automatic leap year compensation valid up to 2100.

How long does the DS1251W-120IND retain data without power?

It retains data for over 10 years in the absence of power.

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