Automotive ICs

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

This IC is a SPI serial EEPROM which operates under the high temperature, at high speed, with low current consumption and the wide range operation. This IC has the capacity of 64 Kbit and the organization of 8192 words &times 8-bit, is able to Page Write and sequential read.

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


Wide range operation
Read: 2.5 V to 5.5 V
Write: 2.5 V to 5.5 V
Operation frequency
5.0 MHz max.
Write time
4.0 ms max.
Page Write
32 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
CMOS schmitt input
( CS , SCK, SI, WP , HOLD)
106cycles/word*1 (Ta =+25℃)
5 × 105cycle / word*1 (Ta =+125℃)
Data retention
100 years (Ta =+25℃)
50 years (Ta =+125℃)
Memory capacitance
64 Kbit
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
AEC-Q100 qualified*2 

*1. For each address (Word: 8 bits)
*2. Contact our sales representatives for details.