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1024K NV SRAM with Phantom Clock

Product Details

Key Features

Parametric specs for Timekeeping & Real-Time Clocks
Interface Bytewide
Phantom Clock
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS:hh
Memory Type NV SRAM
Memory Size (Bytes) 128K
Time of Day Alarms 0
Package/Pins MOD/32
PWRCP/34
Budgetary
Price (See Notes)
23.28
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Simplified Block Diagram

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Parameters

Parametric specs for Timekeeping & Real-Time Clocks
Interface Bytewide
Phantom Clock
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS:hh
Memory Type NV SRAM
Memory Size (Bytes) 128K
Time of Day Alarms 0
Package/Pins MOD/32
PWRCP/34
Budgetary
Price (See Notes)
23.28

Key Features

  • Real-Time Clock (RTC) Keeps Track of Hundredths of Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
  • 128k x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM
  • Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data
  • Watch Function is Transparent to RAM Operation
  • Automatic Leap Year Compensation Valid Up to 2100
  • Full 10% Operating Range
  • Over 10 Years of Data Retention in the Absence of Power
  • Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
  • DIP Module Only
    • Standard 32-Pin JEDEC Pinout
  • PowerCap Module Board Only
    • Surface Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal
    • Replaceable Battery (PowerCap)
    • Pin-for-Pin Compatible with DS1244P and DS1251P

Applications/Uses

Description

The DS1248 1024K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 128K words by 8 bits) with a built-in real-time clock. The DS1248 has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and writes protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock.

Simplified Block Diagram

DS1248, DS1248P: Pin Configuration DS1248, DS1248P: Pin Configuration Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .