SPI Serial EEPROM S-25C256A (256K-bit)

The S-25C256A is a SPI serial EEPROM which operates at high speed, with low current consumption and the wide range operation. The S-25C256A has the capacity of 256 K-bit and the organization of 32768 words × 8-bit. Page write and sequential read are available.


Wide range operation
Read:1.6 V to 5.5 V
Write:1.7 V to 5.5 V
Operation frequency
10.0 MHz (Vcc =2.5 V to 5.5 V)
Write time
5.0 ms Max.
SPI mode (0, 0) and (1, 1)
Page Write
64 bytes / page
Sequential read
Write protect
Software, Hardware
Protect area: 25%, 50%, 100%
Monitors Write to the memory by a status register
Function to prevent malfunction by monitoring clock pulse
Write protect function during the low power supply voltage
CMOS schmitt input
( CS , SCK, SI, WP , HOLD )
106cycles / unit*1 (Ta = +25°C)
Data retention
100 years (Ta = +25°C)
Memory capacity
256 K-bit
Initial shipment data
FFh, SRWD = 0, BP1 = 0, BP0 = 0
Lead-free (Sn 100%), halogen-free*2

*1. For each unit (unit: the 4 bytes with the same address of A14 to A2)
*2. Refer to "Product Name Structure" of the data sheet for details.

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.