4256BWP datasheet(39/41 Pages) STMICROELECTRONICS

39 / 41 page

M24256-BW M24256-BR M24256-BF M24256-DR M24256-DF

Revision history

Doc ID 6757 Rev 28

39/41

Revision history

Table 23.

Document revision history

Date

Revision

Changes

19-Jan-2010

Revision number corrected at bottom of pages.

04-Mar-2010

Process description corrected in Table 23: Ordering information scheme.

21-Dec-2010

Updated text in:

Features, Section 1: Description, Section 3.1: Start condition, Section 3.6:

Write operations, Section 3.9: Write Identification Page (M24256-D only),

Section 3.10: Lock Identification Page (M24256-D only), Section 3.11:

ECC (error correction code) and write cycling, Section 3.17: Reading the

Identification Page (M24256-D only), Section 3.18: Reading the lock

status (M24256-D only), Table 10: AC test measurement conditions,

Section 8: Part numbering.

Updated the following according to the I²C_bus specification:

Table 17: 400 kHz AC characteristics, Table 18: 1 MHz AC characteristics,

Figure 13: AC waveforms.

14-Feb-2011

Added caution under Figure 3: WLCSP connections (top view, marking

side, with balls on the underside).

Updated:

–Description

– Section 3.5: Addressing the memory array

– Section 3.17: Reading the Identification Page (M24256-D only)

– Section 3.18: Reading the lock status (M24256-D only)

– Table 2: Most significant address byte

– Table 6: Absolute maximum ratings

– Table 17: 400 kHz AC characteristics

– Table 18: 1 MHz AC characteristics

Moved:

– Table 2: Most significant address byte from Section 2.6.4 to Section 3.5

Deleted:

– Table 3: Device select code to access the Identification page (M24256-

DR only)

– Table 25: Available M24256-BR, M24256-BW, M24256-BF products

(package, voltage range, temperature grade)

– Table 26: Available M24256-DR products (package, voltage range,

temperature grade)

05-Jul-2011

Added Table 12: Memory cell characteristics.

Updated:

– Section 1: Description

– Table 6: Absolute maximum ratings

–ICC0 maximum value in Table 14: DC characteristics (voltage range W,

device grade 6), Table 15: DC characteristics (voltage range R) and

Table 16: DC characteristics (voltage range F)

Deleted all references to package SO8 (MW) 208 mils width.

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