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STMicroelectronics Electronic Components Datasheet


M24128-A125

Automotive 128-Kbit serial I2C bus EEPROM


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M24128-A125 pdf
M24128-A125
Automotive 128-Kbit serial I²C bus EEPROM with 1 MHz clock
TSSOP8 (DW)
169 mil width
SO8 (MN)
150 mil width
WFDFPN8 (MF)
2 x 3 mm
Datasheet - production data
Features
Compatible with all I2C bus modes
– 1 MHz
– 400 kHz
– 100 kHz
Memory array
– 128 Kbit (16 Kbytes) of EEPROM
– Page size: 64 bytes
– Additional Write lockable page
(Identification page)
Extended temperature and voltage ranges
– -40 °C to 125 °C; 1.8 V to 5.5 V
Schmitt trigger inputs for noise filtering.
Short Write cycle time
– Byte Write within 4 ms
– Page Write within 4 ms
Write cycle endurance
– 4 million Write cycles at 25 °C
– 1.2 million Write cycles at 85 °C
– 600 k Write cycles at 125 °C
Data retention
– 50 years at 125 °C
– 100 years at 25 °C
ESD Protection (Human Body Model)
– 4000 V
Packages
– RoHS compliant and halogen-free
(ECOPACK®2)
December 2014
This is information on a product in full production.
DocID023817 Rev 4
1/40
www.st.com



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M24128-A125 pdf
Contents
Contents
M24128-A125
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Serial Clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Chip Enable (E2, E1, E0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Write Control (WC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 VSS (ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6 Supply voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.3 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.4 Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.5 Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.6 Identification page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1.2 Page Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.3 Write Identification Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1.4 Lock Identification Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1.5 Minimizing Write delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Random Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.2 Current Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.3 Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.4 Read Identification Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.5 Read the lock status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2.6 Acknowledge in Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2/40 DocID023817 Rev 4



Part Number M24128-A125
Description Automotive 128-Kbit serial I2C bus EEPROM
Maker STMicroelectronics - STMicroelectronics
Total Page 30 Pages
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