SPI-Bus Serial EEPROM S-25C320A/640A (32K/64K-bit)

The S-25C320A/640A is a SPI serial EEPROM which operates at high speed, with low current consumption and the wide range operation. The S-25C320A/640A has the capacity of 32 K-bit and 64 K-bit, and the organization is 4096 words × 8-bit, 8192 words × 8-bit. Page write and sequential read are available.


Operating voltage range
Read 1.6 V to 5.5 V
Write 1.7 V to 5.5 V
Operation frequency
5.0 MHz (VCC = 2.5 V to 5.5 V)
Write time
5.0 ms max.
SPI mode (0, 0) and (1, 1)
Page write
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 voltage
CMOS schmitt input
106 cycles / word*1 (Ta = +25°C)
Data retention
100 years (Ta = +25°C)
Memory capacity
S-25C320A 32 K-bit
S-25C640A 64 K-bit
Initial delivery state
FFh, SRWD = 0, BP1 = 0, BP0 = 0
Operation temperature range
Ta = -40°C to +85°C
Lead-free (Sn 100%), halogen-free*2

*1. For each address (Word: 8-bit)
*2. Refer to "■ Product Name Structure" 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.