Microchip’s 25AA256/25LC256-I/SM 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
Feature
- 32,768 x 8-bit (256 Kbit)
- Serial Peripheral Interface (SPI) Compatible
- Supports SPI modes 0 and 3
- Up to 10 MHz clock frequency
- Self-Timed Erase and Write Cycles (5 ms max.)
- Low Power Consumption
- Read current: 6mA (Max) at 10 MHz
- Write current: 5 mA (Max) at 5.5 V
- Standby current: 5 μA (Max) at 5.5 V
- Block Write Protection: Protect 1/4, 1/2 or Entire Array
- More than 1 million erase/write cycles
- Data retention > 200 years
- Temperature Ranges Available
- Industrial (I): -40°C to 85°C
- Extended (E): -40°C to +125°C
- Automotive AECQ-100 Qualified1
- Factory Programming Available
- Available in standard packages including 8-lead PDIP, SOIC, SOIJ, and TSSOP, as well as 5x6mm DFN
