Automotive ICs

For Automotive 150°C Operation 3-Wire Serial EEPROM S-93S46A/56A/66A

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, and 4 K-bit and the organization is 64 words × 16-bit, 128 words × 16-bit and 256 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.


Operation voltage range
Read: 4.0 V to 5.5 V (Ta = -40°C to +150°C)
Write: 4.0 V to 5.5 V (Ta = -40°C to +150°C)
Operation frequency
1 MHz (4.5 V to 5.5 V, Ta = -40°C to +150°C)
Write time
10.0 ms max. 
Sequential read
Write protect function during the low power supply voltage
Function to protect against write due to erroneous instruction recognition
CMOS schmitt input
(CS, SK)
2 × 105 cycle / word*2 (Ta = +150°C)
Data retention
100 years (Ta = +25°C)
50 years (Ta = +125°C)
20 years (Ta = +150°C)
Memory capacity
S-93S46A: 1 K-bit
S-93S56A: 2 K-bit
S-93S66A: 4 K-bit
Initial delivery state
Burn-in specification
Wafer level burn-in
Operation temperature range
Ta = -40°C to +150°C
Lead-free (Sn 100%), halogen-free
AEC-Q100 qualified*3 

*1. Refer to "Endurance" for details.
*2. For each address (Word: 16-bit)
*3. 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.