Features
• AEC-Q100 grade 0 conform qualification
• Compatible with the serial peripheral interface (SPI) bus
• Memory array
– 4-Mbit (512-Kbyte) of EEPROM
– Page size: 512-byte
– Write protection by block: 1/4, 1/2 or whole memory
• Additional write lockable page (identification page)
• Extended temperature and voltage range
– Up to 145 °C (V
CC
from 2.9 V to 5.5 V)
• Maximum clock frequency
– 10 MHz full range of V
CC
• Schmitt trigger inputs for noise filtering
• Short write cycle time
– Byte write within 4 ms
– Page write within 4 ms
• ESD protection (human body model)
– 4000 V
• Packages
– RoHS-compliant and halogen-free (ECOPACK2)
– TSSOP8 package ECOPACK2
– SO8N package ECOPACK2
TSSOP8
169 mil width
SO8N
150 mil width
Product status link
M95M04-A125
M95M04-A145
Automotive 4-Mbit serial SPI bus EEPROM
M95M04-A125 M95M04-A145
Datasheet
DS11938 - Rev 4 - August 2023
For further information contact your local STMicroelectronics sales office.
www.st.com
1 Description
The M95M04-A125 and M95M04-A145 are 4-Mbit serial EEPROM automotive grade devices operating up to
145 °C. They are compliant with the very high level of reliability defined by the automotive standard AEC-Q100
grade 0.
The devices are accessed by a simple serial SPI compatible interface running at up to 10 MHz.
The memory array is based on advanced true EEPROM technology (electrically erasable programmable
memory). The M95M04-A125 and M95M04-A145 are byte-alterable memories (524288 × 8 bits) organized as
1024 pages of 512 bytes in which the data integrity is significantly improved with an embedded error correction
code logic.
The M95M04-A125 and M95M04-A145 offer an additional identification page (512 bytes) in which the ST device
identification can be read. This page can also be used to store sensitive application parameters that can later be
permanently locked in read-only mode.
Figure 1. Logic diagram
HV GENERATOR
+
SEQUENCER
I/O
ARRAY
SENSE AMPLIFIERS
Y DECODER
DATA REGISTER
+
ECC
CONTROL
LOGIC
Q
D
C
W
CUSTOM AREA
PAGE LATCHES X DECODER
STATUS
REGISTER
ADDRESS
REGISTER
S
HOLD
M95M04-A125 M95M04-A145
Description
DS11938 - Rev 4
page 2/40
