Automotive ICs

105°C Operation 3-wire Serial EEPROM for Automotive S-93C46B/56B/66B H Series (1k/2k/4k-bit)

The S-93C46B/56B/66B H Series is a high temperature operation 1/2/4 K-bit 3-wire serial EEPROM for automotive components. It is organized as 64-word × 16-bit, 128-word × 16-bit, 256-word × 16-bit, respectively. Each is capable of sequential read, at which time addresses are automatically incremented in 16-bit blocks. The communication method is by the Microwire bus.


Operating voltage range
Read: 2.7 to 5.5 V (Ta = -40 to +105°C)
Write: 2.7 to 5.5 V (Ta = -40 to +105°C)
Operation frequency
1.0 MHz (Vcc = 4.5 V to 5.5 V, Ta = −40°C to +105°C) 
Write time
8.0 ms max. 
Sequential read capable
Write protect function during the low power supply Voltage
Function to protect against write due to erroneous instruction recognition
106 cycles/word*1 (Ta = +85°C),
5 × 105 cycles/word*1 (Ta = +105°C)
Data retention
100 years (Ta = +25°C),
20 years (Ta = +105°C)
S-93C46B: 1 K-bit
S-93C56B: 2 K-bit
S-93C66B: 4 K-bit
Initial delivery state
Operation temperature range
Ta = −40°C to +105°C 
Lead-free products (Sn 100%)
Halogen-free products
AEC-Q100 qualified*2 

*1. For each address (Word: 16 bits)
*2. Contact our sales office for details.