M95040-W datasheet(6/43 Pages) STMICROELECTRONICS

Part #	M95040-W

Description	4 Kbit, 2 Kbit and 1 Kbit serial SPI bus EEPROM with high-speed clock

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Description

M95040, M95020, M95010

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Doc ID 6512 Rev 8

1

Description

The M95040 is a 4 Kbit (512 x 8) electrically erasable programmable memory (EEPROM),

accessed by a high speed SPI-compatible bus. The other members of the family (M95020

and M95010) are identical, though proportionally smaller (2 and 1 Kbit, respectively).

Each device is accessed by a simple serial interface that is SPI-compatible. The bus signals

are C, D and Q, as shown in Table 2 and Figure 1.

The device is selected when Chip Select (S) is taken low. Communications with the device

can be interrupted using Hold (HOLD). WRITE instructions are disabled by Write Protect

(W).

Figure 1.

Logic diagram

Figure 2.

8-pin package connections

1.

See Section 10: Package mechanical data for package dimensions, and how to identify pin-1.

AI01789C

S

VCC

M95xxx

HOLD

VSS

W

Q

C

D

VSS

C

HOLD

Q

SVCC

W

AI01790D

M95xxx

1

2

3

4

8

7

6

5

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