Microchip Technology Inc

25AA256

In Production

The Microchip Technology Inc. 25AA256/25LC256 (25XX256*) are 256 Kbit Serial Electrically Erasable PROMs. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a Chip Select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of Chip Select, allowing the host to service higher priority interrupts. The 25XX256 is available in standard packages including 8-lead PDIP and SOIC, and advanced packaging including 8-lead DFN and 8-lead TSSOP

 

    Features

      • Max. Clock 10 MHz
      • Low-Power CMOS Technology:- Max. Write Current: 5 mA at 5.5V, 10 MHz- Read Current: 6 mA at 5.5V, 10 MHz- Standby Current: 1 µA at 5.5V
      • 32,768 x 8-bit Organization
      • 64-Byte Page
      • Self-Timed Erase and Write Cycles (5 ms max.)
      • 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
      • High Reliability:- Endurance: 1,000,000 erase/write cycles- Data retention: > 200 years- ESD protection: > 4000V
    Parameter Name
    Value
    Density
    256K bits (x8)
    Op. Volt Range (V)
    1.8 to 5.5
    Max. Clock Freq.
    10 MHz
    Page Size (bytes)
    64
    Temp Range (°C)
    -40°C to +125°C
    Endurance
    1,000,000
    Documentation
    Data Sheets
    02/20/2017
    800KB
      Application Notes
     
     
     
    AppNote
    07/12/2005
    361KB
    AppNote
    10/10/2005
    327KB
    AppNote
    12/15/2005
    696KB
    AppNote
    12/23/2005
    175KB
    AppNote
    05/03/2006
    207KB
    AppNote
    11/27/2007
    370KB
    AppNote
    02/12/2007
    431KB
    AppNote
    11/08/2007
    367KB
    AppNote
    05/22/2008
    216KB
    AppNote
    09/07/2011
    275KB
    AppNote
    05/22/2008
    214KB
    AppNote
    12/07/2011
    282KB
    AppNote
    08/18/2005
    194KB
    AppNote
    01/04/2005
    317KB
    AppNote
    06/28/2005
    343KB
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    10216KB
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    Sell Sheets
    07/11/2011
    182KB
      IBIS
     
     
     
     
    IBIS
    01/29/2013
    104KB
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    65664KB
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    26546KB
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    33683KB
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    Cross Reference
    12/20/2005
    471KB
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    04/13/2016
    10173KB
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    Verilog
    02/04/2013
    9KB
    Pricing & Samples
    All pricing shown in USD only.
    Part Number
    Leads
    Package Type
    Temp Range
    Packing
    1+
    26+
    100+
    1000+
    5000+
    Buy
    Sample
    25AA256-E/MF
    8
    DFN-S
    -40C to +125C
    TUBE
    1.42
    1.37
    1.31
    1.24
    1.17
     
    25AA256-E/P
    8
    PDIP
    -40C to +125C
    TUBE
    1.24
    1.20
    1.15
    1.09
    1.02
     
    25AA256-E/SM
    8
    SOIJ
    -40C to +125C
    T/R
    1.20
    1.16
    1.11
    1.05
    0.99
     
    25AA256-E/SN
    8
    SOIC
    -40C to +125C
    TUBE
    1.18
    1.14
    1.09
    1.03
    0.97
     
    25AA256-E/ST
    8
    TSSOP
    -40C to +125C
    TUBE
    1.22
    1.18
    1.13
    1.07
    1.01
     
    25AA256-I/MF
    8
    DFN-S
    -40C to +85C
    TUBE
    1.36
    1.31
    1.26
    1.19
    1.12
    25AA256-I/P
    8
    PDIP
    -40C to +85C
    TUBE
    1.18
    1.14
    1.09
    1.03
    0.97
    25AA256-I/SM
    8
    SOIJ
    -40C to +85C
    TUBE
    1.14
    1.10
    1.05
    1.00
    0.94
    25AA256-I/SN
    8
    SOIC
    -40C to +85C
    TUBE
    1.12
    1.08
    1.04
    0.98
    0.92
    25AA256-I/ST
    8
    TSSOP
    -40C to +85C
    TUBE
    1.16
    1.12
    1.07
    1.02
    0.96
    25AA256T-E/MF
    8
    DFN-S
    -40C to +125C
    T/R
    1.42
    1.37
    1.31
    1.24
    1.17
     
    25AA256T-E/SM
    8
    SOIJ
    -40C to +125C
    T/R
    1.20
    1.16
    1.11
    1.05
    0.99
     
    25AA256T-E/SN
    8
    SOIC
    -40C to +125C
    T/R
    1.18
    1.14
    1.09
    1.03
    0.97
     
    25AA256T-E/ST
    8
    TSSOP
    -40C to +125C
    T/R
    1.22
    1.18
    1.13
    1.07
    1.01
     
    25AA256T-I/MF
    8
    DFN-S
    -40C to +85C
    T/R
    1.36
    1.31
    1.26
    1.19
    1.12
     
    25AA256T-I/SM
    8
    SOIJ
    -40C to +85C
    T/R
    1.14
    1.10
    1.05
    1.00
    0.94
     
    25AA256T-I/SN
    8
    SOIC
    -40C to +85C
    T/R
    1.12
    1.08
    1.04
    0.98
    0.92
     
    25AA256T-I/ST
    8
    TSSOP
    -40C to +85C
    T/R
    1.16
    1.12
    1.07
    1.02
    0.96
     
    25AA256X-I/ST
    8
    TSSOP
    -40C to +85C
    TUBE
    1.16
    1.12
    1.07
    1.02
    0.96
    25AA256XT-I/ST
    8
    TSSOP
    -40C to +85C
    T/R
    1.16
    1.12
    1.07
    1.02
    0.96
     

    ** Device not available to purchase online. Please contact a sales office for pricing information.
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      • Socket: AC164312   PartNo: 25AA256 (8SM)
      • Socket: AC164306   PartNo: 25AA256 (8ST)
      • Socket: AC164324   PartNo: 25AA256 (8MF)
      • Socket: AC164302   PartNo: 25AA256 (8SN)
    Similar Devices
    Product
    Memory Size
    Memory Speed
    Package
    Price5K
    256K
    10 MHz
    DFN-S-8, PDIP-8, SOIC 150mil-8, SOIJ-8, TSSOP-8
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    RoHS Information
    Part
    Number
    Device
    Weight
    Shipping
    Weight
    Lead
    Count
    Package
    Type
    Package
    Width
    Solder
    Composition
    JEDEC
    Indicator
    RoHS
     
    China
    EFUP
    25AA256-E/P
    0.486700
    0.900000
    8
    PDIP
    .300in
    Matte Tin
    e3
    25AA256-I/P
    0.486700
    0.900000
    8
    PDIP
    .300in
    Matte Tin
    e3
    25AA256T-E/SM
    0.124400
    0.379048
    8
    SOIJ
    .208in
    Matte Tin
    e3
    25AA256-E/SM
    0.124400
    0.379048
    8
    SOIJ
    .208in
    Matte Tin
    e3
    25AA256T-I/SM
    0.124400
    0.379048
    8
    SOIJ
    .208in
    Matte Tin
    e3
    25AA256-I/SM
    0.124400
    0.266667
    8
    SOIJ
    .208in
    Matte Tin
    e3
    25AA256-E/SN
    0.078000
    0.160000
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    25AA256T-E/SN
    0.078000
    0.230303
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    25AA256T-I/SN16KVAO
    0.078000
    0.230303
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    25AA256T-I/SN
    0.078000
    0.230303
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    25AA256-I/SN
    0.078000
    0.160000
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    25AA256T-I/ST16KVAO
    0.033000
    0.215600
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256T-E/ST
    0.033000
    0.215600
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256-E/ST
    0.033000
    0.090000
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256X-I/ST
    0.033000
    0.090000
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256XT-I/ST
    0.033000
    0.215600
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256-I/ST
    0.033000
    0.090000
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256T-I/ST
    0.033000
    0.215600
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    25AA256T-E/MF
    0.076900
    0.218182
    8
    DFN-S
    6x5x0.9mm
    Matte Tin
    e3
    25AA256-E/MF
    0.076900
    0.133333
    8
    DFN-S
    6x5x0.9mm
    Matte Tin
    e3
    25AA256-I/MF
    0.076900
    0.133333
    8
    DFN-S
    6x5x0.9mm
    Matte Tin
    e3
    25AA256T-I/MF
    0.076900
    0.218182
    8
    DFN-S
    6x5x0.9mm
    Matte Tin
    e3
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.