Microchip 25AA256-I/ST, 256kbit Serial EEPROM Memory, 160ns 8-Pin TSSOP SPI

  • RS Stock No. 826-1770
  • Mfr. Part No. 25AA256-I/ST
  • Manufacturer Microchip
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): US
Product Details

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

Attribute Value
Memory Size 256kbit
Interface Type SPI
Package Type TSSOP
Mounting Type Surface Mount
Pin Count 8
Organisation 32768 x 8 bit
Minimum Operating Supply Voltage 1.8 V
Maximum Operating Supply Voltage 5.5 V
Number of Bits per Word 8bit
Length 4.5mm
Width 3.1mm
Height 1.05mm
Dimensions 4.5 x 3.1 x 1.05mm
Maximum Random Access Time 160ns
Maximum Operating Temperature +85 °C
Data Retention 200yr
Minimum Operating Temperature -40 °C
Number of Words 32768
Discontinued product
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