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Parallel EEPROM

Microchip is the world's leading manufacturer of parallel EEPROM devices. Parallel EEPROMs enable stored data to be updated byte-by-byte or by full sector, providing design flexibility. The parallel interface devices offer faster read times than serial Interface protocols. Microchip provides a complete selection of densities (64-Kbit to 1-Mbit), operating voltages, and device packages. Microchip's Battery Voltage™ (2.7V), low voltage (3V), and 5V devices are used extensively across a broad spectrum of products, including telecommunications, avionics, and military applications.

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Key Features

  • Save on components — The devices are accessed like a static RAM for the read or write cycle, without the need for external components.
  • Military grade EEPROM — 256-Kbit and 1-Mbit parallel EEPROM’s compliant to MIL-STD-883 and dual marked with Standard Microcircuit Drawings (SMD) part numbers.
  • Extra features — The devices offer extra features that include internal error correction, an optional software data protection mechanism, and space for device identification.
Device Description
AT28BV256 Battery-Voltage Parallel EEPROM 256K (32K x 8)
AT28BV64B Battery-Voltage Parallel EEPROM 64K (8K x 8) with Page Write and Software Data Protection
AT28C010 Paged Parallel EEPROM 1M (128K x 8)
AT28C256 Paged Parallel EEPROM 256K (32K x 8)
AT28C64B Parallel EEPROM 64K (8K x 8) with Page Write and Software Data Protection
AT28HC256 High-Speed Parallel EEPROM 256K (32K x 8)
AT28HC64B High-Speed ParallelEEPROM 64K (8K x 8) with Page Write and Software Data Protection
AT28HC64BF High Speed Parallel EEPROM 64K (8K x 8) with Page Write and Software Data Protection
AT28LV010 Low-Voltage Paged Parallel EEPROM 1M (128K x 8)
Tabs / Memory
Memory Product Comparison

Memory Product Comparison

  Serial
EEPROM
Parallel
EEPROM
OTP
EPROM
Serial
Flash
Parallel
Flash
Serial
SRAM
Serial
NVSRAM
Serial
EERAM
Clock Frequency 0.4 - 20 MHz 70 ns 45 ns 20 - 104 MHz 45 - 70 ns 16 - 20 MHz 16 - 20 MHz 1 MHz
Cost/Bit High High High Low Low Medium Medium Low
Read Times Medium Fast Fast Medium Fast Medium Medium Medium
Write Times Medium Fast NA Medium Fast Instantaneous Instantaneous Instantaneous
Pin Count 8 pins 28 and 32 pins 28+ pins 8 pins 32 and 48 pins 8 pins 8 pins 8 pins
Data Retention 200+ Years 10
Years
10
Years
100+ Years 100+ Years Volatile 20+ Years(with battery) 200+ Years
Typ. Standby Current 1 µA 200 µA 100 µA ~15 µA ~30 µA ~4 µA ~4 µA ~40 µA
Voltage 1.7 V - 5.5V 2.7V, 5V 2.7V, 5V 1.65V - 1.95V, 2.7V - 3.6V, 2.3V - 3.6V 1.65V - 1.95V, 2.7V - 3.6V, 4.5V - 5.5V 1.65V - 1.95V, 2.5V - 5.5V 2.5V - 5.5V 2.7V - 3.6V, 4.5V - 5.5V
Temperature -40°C to +125°C -55°C to +125°C -55°C to +125°C -40°C to +105°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C

EEPROM Video Channel

Memory Video Channel