M95320-R STMICROELECTRONICS [STMicroelectronics], M95320-R Datasheet - Page 5

• Manufacturer Part Number: M95320-R
• Description: 32Kbit and 64Kbit Serial SPI Bus EEPROMs With High Speed Clock
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SUMMARY DESCRIPTION
These electrically erasable programmable memo-
ry (EEPROM) devices are accessed by a high
speed SPI-compatible bus.
The
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.
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
M95320, M95640, M95320-W, M95640-W Device Grade 3
HOLD
M95320,
W
M95320, M95640, M95320-W, M95640-W
D
C
S
Devices Root Part Numbers
M95320-W,
M95320-R, M95640-R
M95320-S, M95640-S
V CC
V SS
Device Grade 6
M95xxx
M95320-R
Q
AI01789C
and
The device is accessed by a simple serial interface
that is SPI-compatible. The bus signals are C, D
and Q, as shown in
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
2.).
Figure 3. 8 Pin Package Connections
Note: 1. See
Table 3. Signal Names
Markings on
2. NC, Not Connected.
Products
Previous
HOLD
V
V
xxxxS
xxxxS
mensions and how to identify pin-1.
W
Q
C
D
S
CC
SS
-
-
PACKAGE MECHANICAL
V SS
1
W
Q
S
Serial Clock
Serial data Input
Serial data Output
Chip Select
Write Protect
Hold
Supply Voltage
Ground
1
2
3
4
Table 3.
M95xxx
Markings on
Products
Current
AI01790D
xxxxV
xxxxB
-
-
8
7
6
5
and
M95640, M95320
1
V CC
HOLD
C
D
section for package di-
Figure
Markings on
Products
xxxxP
xxxxP
xxxxP
xxxxP
2..
New
Table
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