M24256-BWMN6TP STMicroelectronics, M24256-BWMN6TP Datasheet - Page 22

• Manufacturer Part Number: M24256-BWMN6TP
• Description: IC EEPROM 256KBIT 400KHZ 8SOIC
• Manufacturer: STMicroelectronics

Specifications of M24256-BWMN6TP

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 256K (32K x 8)
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• Density: 256Kb
• Interface Type: Serial (I2C)
• Organization: 32Kx8
• Access Time (max): 900ns
• Frequency (max): 400KHz
• Write Protection: Yes
• Data Retention: 40Year
• Operating Supply Voltage (typ): 3.3/5V
• Package Type: SOIC
• Operating Temp Range: -40C to 85C
• Supply Current: 5mA
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Maximum Clock Frequency: 0.4 MHz
• Access Time: 900 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Current: 5 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 2.5 V, 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8623-2; M24256-BWMN6TP

Device operation
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3.19
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Reading the lock status (M24256-D only)
The locked/unlocked status of the Identification page can be checked by issuing a specific
truncated command [Identification Page Write instruction + one data byte]: this data byte will
be acknowledged if the Identification page is unlocked, while it will not be acknowledged if
the Identification page is locked.
Once the acknowledge bit of this data byte is read, it is recommended to generate a Start
condition followed by a Stop condition, so that:
●
●
Acknowledge in Read mode
For all Read instructions, the device waits, after each byte read, for an acknowledgment
during the 9
time, the device terminates the data transfer and switches to its Standby mode.
the instruction is truncated and not executed as the Start condition resets the device
internal logic,
the device is set back into Standby mode by the Stop condition.
th
bit time. If the bus master does not drive Serial Data (SDA) Low during this
Doc ID 6757 Rev 22
M24256-BF, M24256-BR, M24256-BW, M24256-DR