IC EEPROM 256KBIT 400KHZ 8SOIC

 

M24256-BWMN6TP

Manufacturer Part NumberM24256-BWMN6TP
DescriptionIC EEPROM 256KBIT 400KHZ 8SOIC
ManufacturerSTMicroelectronics
M24256-BWMN6TP datasheets

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Specifications of M24256-BWMN6TP

Format - MemoryEEPROMs - SerialMemory TypeEEPROM
Memory Size256K (32K x 8)Speed400kHz
InterfaceI²C, 2-Wire SerialVoltage - Supply2.5 V ~ 5.5 V
Operating Temperature-40°C ~ 85°CPackage / Case8-SOIC (3.9mm Width)
Density256KbInterface TypeSerial (I2C)
Organization32Kx8Access Time (max)900ns
Frequency (max)400KHzWrite ProtectionYes
Data Retention40YearOperating Supply Voltage (typ)3.3/5V
Package TypeSOICOperating Temp Range-40C to 85C
Supply Current5mAOperating Supply Voltage (min)2.5V
Operating Supply Voltage (max)5.5VOperating Temperature ClassificationIndustrial
MountingSurface MountPin Count8
Maximum Clock Frequency0.4 MHzAccess Time900 ns
Supply Voltage (max)5.5 VSupply Voltage (min)2.5 V
Maximum Operating Current5 mAMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMTMinimum Operating Temperature- 40 C
Operating Supply Voltage2.5 V, 5.5 VLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-8623-2
M24256-BWMN6TP		  
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M24256-BWMN6TP PDF datasheetM24256-BWMN6TP PDF datasheet #2M24256-BWMN6TP PDF datasheet #3
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Contents
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
Serial Clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3
Chip Enable (E0, E1, E2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4
Write Control (WC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5
V
ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SS
2.6
Supply voltage (V
2.6.1
2.6.2
2.6.3
2.6.4
3
Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2
Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3
Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4
Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5
Addressing the memory array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6
Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7
Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.8
Page Write (memory array) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.9
Write Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . . . . . . . 16
3.10
Lock Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . . . . . . . 16
3.11
ECC (error correction code) and write cycling . . . . . . . . . . . . . . . . . . . . . 16
3.12
Minimizing system delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . 18
3.13
Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.14
Random Address Read (in memory array) . . . . . . . . . . . . . . . . . . . . . . . . 19
3.15
Current Address Read (in memory array) . . . . . . . . . . . . . . . . . . . . . . . . 20
3.16
Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.17
Reading the Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . 20
2/42
M24256-BF, M24256-BR, M24256-BW, M24256-DR
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CC
Operating supply voltage V
CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-down conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Doc ID 6757 Rev 23

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