M95320-RBN6T datasheet(5/42 Pages) STMICROELECTRONICS

Part #	M95320-RBN6T

Description	32Kbit and 64Kbit Serial SPI Bus EEPROMs With High Speed Clock

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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M95640, M95320

SUMMARY DESCRIPTION

These electrically erasable programmable memo-

ry (EEPROM) devices are accessed by a high

speed SPI-compatible bus.

The

M95320,

M95320-W,

M95320-R

and

M95320-S are 32Kbit devices organized as 4096

x 8 bits. The M95640, M95640-W, M95640-R and

M95640-S are 64Kbit devices organized as 8192

x 8 bits.

The device is accessed by a simple serial interface

that is SPI-compatible. The bus signals are C, D

and Q, as shown in Table 3. and Figure 2..

The device is selected when Chip Select (S) is tak-

en Low. Communications with the device can be

interrupted using Hold (HOLD).

The devices are available in three different ver-

sions identified by a specific marking (see Table

2.).

Table 2. How to Identify Previous, Current and New Products by the Process Identification Letter

Note: 1. For further information, please ask your ST Sales Office for Process Change Notices.

Figure 2. Logic Diagram

Figure 3. 8 Pin Package Connections

Note: 1. See PACKAGE MECHANICAL section for package di-

mensions and how to identify pin-1.

2. NC, Not Connected.

Table 3. Signal Names

Devices Root Part Numbers

Markings on

Current

Products1

Markings on

New

Products1

M95320, M95640, M95320-W, M95640-W

Device Grade 6

xxxxS

xxxxV

xxxxP

M95320, M95640, M95320-W, M95640-W Device Grade 3

xxxxS

xxxxB

xxxxP

M95320-R, M95640-R

-

xxxxP

M95320-S, M95640-S

-

xxxxP

AI01789C

S

VCC

M95xxx

HOLD

VSS

W

Q

C

D

C

Serial Clock

D

Serial data Input

Q

Serial data Output

S

Chip Select

W

Write Protect

HOLD

Hold

VCC

Supply Voltage

VSS

Ground

D

VSS

C

HOLD

Q

SVCC

W

AI01790D

M95xxx

1

2

3

4

8

7

6

5

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