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AT28C256

5V 256Kbit (32Kbit x 8) Parallel EEPROM with Software Data Protection

Status: In Production

Features:

  • 32 Kbits x 8 (256 Kbit)
  • 5V ± 10% Supply
  • Parallel Interface
  • 150ns access time
  • Self-Timed Erase and Write Cycles (10 ms max)
  • Page Write and Byte Write
  • Data Polling for end of write detection
  • Low Power Consumption
  • Read / Write current 40 mA (Max)
  • Standby current TTL 2 mA (Max), CMOS 200 μA (Max)
  • Write-Protection
  • Hardware Protection
  • Software Data Protect
  • High-endurance Option 100,000 erase/write cycles
  • Data retention > 10 years
  • Temperature Ranges
  • Standard Temperature Range: -40°C to 85°C
  • Military Temperature Range: -55°C to 125°C
  • Available in Green (Pb/Halide-free) Packaging
  • 32-lead, Plastic J-leaded Chip Carrier (PLCC)
  • 28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
  • 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC)
  • 28-lead, Plastic Thin Small Outline Package (TSOP)
  • Available in SMD Dual marked (5962-88525xxxx) CERAMIC Hermetic Packaging
  • 28-Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline (Cerdip)
  • 28-Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack)
  • 32-Pad, Non-windowed, Ceramic, Leadless Chip Carrier (LCC)
View More
Overview
Documents
Development Environment
Similar Devices
RoHS Information
Buy Now

Device Overview

Summary

The Microchip AT28C256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 150ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 200μA.  Accessed like static RAM for the read or write cycle without external components, it contains a 64-byte page register to allow writing of up to 64bytes simultaneously. Features an internal Error Correction Circuit for extended endurance and improved data retention, in Military version. Optional Software Data Protection mechanism guards against inadvertent writes; and an extra 64 bytes of EEPROM enables device identification or tracking.

The AT28C256 is also available DUAL MARKED where applicable with the appropriate Standard Military Drawing Number - 5962-88525xxxx.  See the datasheet for exact MIL product availability.

Additional Features
    • 32 Kbits x 8 (256 Kbit)
    • 5V ± 10% Supply
    • Parallel Interface
      • 150ns access time
    • Self-Timed Erase and Write Cycles (10 ms max)
      • Page Write and Byte Write
      • Data Polling for end of write detection
    • Low Power Consumption
      • Read / Write current 40 mA (Max)
      • Standby current TTL 2 mA (Max), CMOS 200 μA (Max)
    • Write-Protection
      • Hardware Protection
      • Software Data Protect
    • High-endurance Option 100,000 erase/write cycles
    • Data retention > 10 years
    • Temperature Ranges
      • Standard Temperature Range: -40°C to 85°C
      • Military Temperature Range: -55°C to 125°C
    • Available in Green (Pb/Halide-free) Packaging
      • 32-lead, Plastic J-leaded Chip Carrier (PLCC)
      • 28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
      • 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC)
      • 28-lead, Plastic Thin Small Outline Package (TSOP)
    • Available in SMD Dual marked (5962-88525xxxx) CERAMIC Hermetic Packaging
      • 28-Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline (Cerdip)
      • 28-Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack)
      • 32-Pad, Non-windowed, Ceramic, Leadless Chip Carrier (LCC)
Parametrics
Name
Value
Density
256Kb
Op. Volt Range (V)
4.5 to 5.5
Read Access Time
150/200/250/300/350ns

Documents

Jump to:

Data Sheet

Getting Started

07/01/2014
114KB

Development tools data is currently unavailable.

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
AT28C256-15PU
4.066700
3.733333
28
PDIP
.600in
Matte Tin
e3
AT28C256-15JU
1.129000
2.333333
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256E-15JU
1.129000
2.333333
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256EF-15JU
1.129000
2.333333
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256F-15JU
1.129000
2.333333
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256EF-15JU-T
1.129000
1.896000
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256F-15JU-T
1.129000
1.896000
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256E-15JU-T
1.129000
1.896000
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256-15JU-T
1.129000
1.896000
32
PLCC
11.5x14x3.37mm
Matte Tin
e3
AT28C256-15SU
0.770400
1.370370
28
SOIC
.300in
Matte Tin
e3
AT28C256E-15SU
0.770400
1.370370
28
SOIC
.300in
Matte Tin
e3
AT28C256F-15SU
0.770400
1.370370
28
SOIC
.300in
Matte Tin
e3
AT28C256-15SU-T
0.770400
1.152500
28
SOIC
.300in
Matte Tin
e3
AT28C256E-15SU-T
0.770400
1.152500
28
SOIC
.300in
Matte Tin
e3
AT28C256F-15SU-T
0.770400
1.152500
28
SOIC
.300in
Matte Tin
e3
AT28C256E-15DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-20DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-15DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-20DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-25DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-25DM/883-023
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-15DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-15DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-20DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-25DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256-20DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256F-15DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-25DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256F-15DM/883
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-25DM/883-815
7.980000
0.000000
28
CERDIP
.600In
SnPb
e0
AT28C256E-20LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256E-25LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-20LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-20LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256E-15LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-25LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-15LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-25LM/883-829
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256F-15LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-25LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256E-25LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256F-15LM/883
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256E-15LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256-15LM/883-815
0.000364
0.000000
32
CLCC
11.4x14x2.54mm
SnPb
e0
AT28C256E-20UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-25UM/883-815
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-15UM/883-610
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-20UM/883-815
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256E-15UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-15UM/883-815
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-20UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256E-25UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256F-15UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-15UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256E-25UM/883-815
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256-25UM/883
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256E-15UM/883-815
0.000364
0.000000
28
CPGA
13.6x15.1x2.57mm
SnPb
e0
AT28C256E-25FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-25FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-20FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256F-15FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256E-15FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-20FM/883-815
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-25FM/883-815
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256E-20FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256E-15FM/883-815
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-25FM/883-949
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-15FM/883-815
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-15FM/883
0.000364
0.000000
28
Flatpack
10.2x18.3x3.02mm
SnPb
e0
AT28C256-15TU
0.232100
1.696581
28
TSOP
8x11.8x1mm
Matte Tin
e3
AT28C256E-15TU
0.232100
1.696581
28
TSOP
8x11.8x1mm
Matte Tin
e3
AT28C256F-15TU
0.232100
1.696581
28
TSOP
8x11.8x1mm
Matte Tin
e3
AT28C256E-15TU-T
0.232100
0.048000
28
TSOP
8x11.8x1mm
Matte Tin
e3
AT28C256-15TU-T
0.232100
0.048000
28
TSOP
8x11.8x1mm
Matte Tin
e3
AT28C256F-15TU-T
0.232100
0.048000
28
TSOP
8x11.8x1mm
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.

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