M95320-MB3 데이터 시트보기 (PDF) - STMicroelectronics

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M95320-MB3

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

STMicroelectronics 

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

Devices Root Part Numbers

Markings on

Previous

Products1

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

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

Figure 2. Logic Diagram

VCC

D

C

S

W

HOLD

M95xxx

VSS

Q

AI01789C

Figure 3. 8 Pin Package Connections

M95xxx

S1

Q2

8 VCC

7 HOLD

W3

6C

VSS 4

5D

AI01790D

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

mensions and how to identify pin-1.

2. NC, Not Connected.

Table 3. Signal Names

C

Serial Clock

D

Serial data Input

Q

Serial data Output

S

Chip Select

W

Write Protect

HOLD

Hold

VCC

Supply Voltage

VSS

Ground

5/42

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