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    Microchip 25LC256-E/P, 256kB EEPROM Memory, 160ns 8-Pin PDIP Serial-SPI

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    25AA256/25LC256 SPI Serial EEPROM

    Microchip’s 25AA256/25LC256 family of devices are 256 Kbit SPI Serial EEPROMs available in a variety of package, temperature and power supply variants.

    The Serial Peripheral Interface (SPI) is utilised to provide the required Clock Input (SCK), Data In (SI) and Data Out (SO) signals. The operation of these devices can be paused via a Hold pin (HOLD) which causes inputs to be ignored with the exception higher priority interrupts defined via the Chip Select (CS) pin.


    Max. Clock 10 MHz
    Maximum write current 5 mA
    Read current: 6 mA (typical)
    Standby current: 1 μA (typical)
    32,768 x 8-bit Organization
    64-Byte Page
    Self-Timed Erase and Write Cycles, 5 ms (maximum)
    Block Write Protection: Protect none, 1/4, 1/2 or all of array
    Built-In Write Protection: Power-on/off data protection circuitry, Write enable latch, Write-protect pin
    Sequential Read
    Endurance: >1M erase/write cycles
    Data retention: >200 years
    ESD protection: >4000V

    EEPROM Serial Access - Microchip


    Memory Size256kB
    Interface TypeSerial-SPI
    Package TypePDIP
    Mounting TypeThrough Hole
    Pin Count8
    Organisation32768 x 8 bit
    Minimum Operating Supply Voltage2.5 V
    Maximum Operating Supply Voltage5.5 V
    Number of Bits per Word8bit
    Dimensions0.4 x 0.28 x 0.195in
    Maximum Random Access Time160ns
    Maximum Operating Temperature+125 °C
    Minimum Operating Temperature-40 °C
    Data Retention200yr
    Number of Words32768
    Discontinued product