Automotive ICs

125°C Operation SPI Serial EEPROM for Automotive S-25A640A, S-25A640B (64K-bit)

This IC is a SPI serial EEPROM which operates under the high temperature, at high speed, with the wide range operation for automotive components. This IC has the capacity of 64 K-bit and the organization of 8192 words × 8-bit. Page write and Sequential read are available.

Caution: Before using the product in automobile control unit or medical equipment, it is imperative to contact our sales representatives.


Operating voltage range
Read: 2.5 V ~ 5.5 V
Write: 2.5 V ~ 5.5 V
Operation frequency
S-25A640A: 5.0 MHz max.
S-25A640B: 6.5 MHz max.
Write time
S-25A640A: 4.0 ms max.
S-25A640B: 5.0 ms max.
SPI mode (0, 0) and (1, 1)
Page write
32 bytes / page
Sequential read
Write protect
Software, Hardware
Protect area
25%, 50%, 100%
Monitoring of a write memory state by the status register
Function to prevent malfunction by monitoring clock pulse
Write protect function during the low power supply voltage
CMOS schmitt input
S-25A640A : 106 cycle / word*2 (Ta = +25°C), 5 × 105 cycle / word*2 (Ta = +125°C)
S-25A640B : 106 cycle / word*2 (Ta = +25°C), 3 × 105 cycle / word*2 (Ta = +125°C)
Data retention
100 years (Ta = +25°C)
50 years (Ta = +125°C)
Memory capacity
64 K-bit
Initial delivery state
FFh, SRWD = 0, BP1 = 0, BP0 = 0
Burn-in specification
Wafer level burn-in
Operation temperature range
Ta = −40°C to +125°C 
Lead-free (Sn 100%), halogen-free*3
AEC-Q100 qualified*4

*1. Refer to "■ Endurance" for details.
*2. For each address (Word: 8-bit)
*3. Refer to "■ Product Name Structure" for details.
*4. Contact our sales representatives 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.