DS1225AD-150

有效庫存6,772

Nonvolatile SRAM with 64k memory

  • 製造商零件號 # : DS1225AD-150

  • 包裝/封裝: EDIP-28

  • 製造商: Analog Devices

  • 產品分類 : Memory

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DS1225AD-150 數據表

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詳細說明

Non-Volatile Sram, 64Kbit, 150Ns, Edip28; Memory Type:Sram; Memory Size:64Kbit; Nvram Memory Configuration:8K X 8Bit; Ic Interface Type:-; Access Time:150Ns; Memory Case Style:-; No. Of Pins:28Pins; Supply Voltage Min:4.5V; Msl:- Rohs Compliant: Yes |Maxim Integrated/analog Devices DS1225AD-150+

主要特徵

  • 10 years minimum data retention in the absence of external power
  • Data is automatically protected during power loss
  • Directly replaces 8k x 8 volatile static RAM or EEPROM
  • Unlimited write cycles
  • Low-power CMOS
  • JEDEC standard 28-pin DIP package
  • Read and write access times of 70ns
  • Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
  • Full ±10% VCC operating range (DS1225AD)
  • Optional ±5% VCC operating range (DS1225AB)
  • Optional industrial temperature range of -40°C to +85°C, designated IND

應用

  • The DS1225AD-150+ is a non-volatile SRAM with a 150ns access time
  • It is commonly used in applications where critical data must be stored even when power is removed, such as in industrial automation, medical equipment, and telecommunications systems
  • 規格

    以下是所選零件的基本參數,涉及零件的特性及其所屬類別。

    Product Category ! NVRAM Package / Case EDIP-28
    Interface Type Parallel Memory Size ! 64 kbit
    Organization 8 k x 8 Data Bus Width 8 bit
    Access Time 150 ns Supply Voltage - Max 5.5 V
    Supply Voltage - Min 4.5 V Operating Supply Current 75 mA
    Minimum Operating Temperature 0 C Maximum Operating Temperature ! + 70 C
    Series DS1225AD Brand Analog Devices / Maxim Integrated
    Height 9.4 mm Length 39.12 mm
    Mounting Style Through Hole Operating Supply Voltage ! 5 V
    Product Type ! NVRAM Factory Pack Quantity 12
    Subcategory Memory & Data Storage Type NVSRAM
    Width 18.29 mm Part # Aliases DS1225AD

    常見問題解答

    What is DS1225AD-150?

    The DS1225AD-150 is a non-volatile SRAM (NVSRAM) memory chip designed by Maxim Integrated. It combines the features of a static random access memory (SRAM) with a non-volatile electrically erasable programmable read-only memory (EEPROM), providing data retention even when power is disconnected. It is commonly used in applications requiring reliable data storage, such as industrial automation, automotive electronics, and data logging systems.

    How Does DS1225AD-150 Work?

    The DS1225AD-150 operates as a non-volatile SRAM, utilizing a small onboard battery to retain data when the main power source is turned off. When in use, it functions like a standard SRAM, allowing fast read and write operations. Upon power loss, the integrated EEPROM circuitry automatically transfers the contents of the SRAM to the non-volatile EEPROM, ensuring data integrity and retention.

    How Many Pins does DS1225AD-150 have and What are the Functions of the Pinout Configuration?

    The DS1225AD-150 is housed in a 28-pin DIP (Dual Inline Package) package. The pinout configuration includes:

    • VCC: Power supply pin.
    • GND: Ground pin.
    • CE1, CE2: Chip enable inputs for SRAM and EEPROM, respectively.
    • OE: Output enable pin.
    • WE: Write enable pin.
    • NC: No connect pin.
    • BYTE: Byte control pin.
    • ADDR: Address pins.
    • DQ: Data input/output pins.
    • VBAT: Battery backup input pin for data retention.

    What are the Pros and Cons of DS1225AD-150?

    Pros:

    • Data Retention: Maintains data integrity during power loss or system shutdown.
    • Fast Access: Functions as a high-speed SRAM during normal operation.
    • Durable Construction: Offers reliable non-volatile storage in a robust package.
    • Simple Integration: Can be used as a drop-in replacement for standard SRAM chips.
    • Wide Operating Voltage Range: Supports a broad range of supply voltages for versatility.

    Cons:

    • Battery Dependence: Relies on a backup battery for data retention, requiring periodic maintenance.
    • Complex Pinout: The 28-pin DIP package may have a relatively large pin count compared to modern memory devices.
    • Endurance Limit: The EEPROM portion has a limited number of write cycles, which may affect long-term durability in some applications.

    Are There Any Equivalents/Alternatives to DS1225AD-150 for Recommendation?

    • The DS1230AB from Maxim Integrated is a similar non-volatile SRAM with a different pinout configuration.
    • Alternatives to the DS1225AD-150 include the M48Z02 from STMicroelectronics and the CY14B101L from Cypress Semiconductor.

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