Automotive ICs

Automotive 125°C Operation 3-wire Serial EEPROM S-93A46B/56B/66B/76B/86B

This IC is a high temperature operation 3-wire serial EEPROM for automotive components. This IC has the capacity of 1 K-bit, 2 K-bit, 4 K-bit, 8 K-bit and 16 K-bit, and the organization is 64 words × 16-bit, 128 words × 16-bit, 256 words × 16-bit, 512 words × 16-bit and 1024 words × 16-bit, respectively. Sequential read is available, at which time addresses are automatically incremented in 16-bit blocks. The communication method is by the Microwire bus.

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


Memory capacity
S-93A46B : 1 K-bit (64-word ×16-bit)
S-93A56B : 2 K-bit (128-word ×16-bit)
S-93A66B : 4 K-bit (256-word ×16-bit)
S-93A76B : 8 K-bit (512-word ×16-bit)
S-93A86B : 16 K-bit (1024-word ×16-bit)
Operation voltage range
Read: : 2.5 V to 5.5 V
Write : 2.5 V to 5.5 V
Operation frequency
2.0 MHz max.
Write time
4.0 ms max.
Sequential read
CMOS schmitt input (CS, SK, DI)
Write protect function during the low power supply voltage
Function to protect against write due to erroneous instruction recognition
106 cycle / word*1 (Ta = +85°C)
8 × 105 cycle / word*1 (Ta = +105°C)
5 × 105 cycle / word*1 (Ta = +125°C)
Data retention
100 years (Ta = +25°C)
50 years (Ta = +125°C)
Initial delivery state
Wafer level burn-in (standard specification)
Operation temperature range
Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
AEC-Q100 qualified*2

*1. For each address (Word: 16-bit)
*2. 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.