M95128-BN3 STMICROELECTRONICS [STMicroelectronics], M95128-BN3 Datasheet - Page 5

• Manufacturer Part Number: M95128-BN3
• Description: 256Kbit and 128Kbit Serial SPI Bus EEPROM 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 memory array is
organized as 32768 x 8 bit (M95256) and 16384 x
8 bit (M95128).
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).
Figure 2. Logic Diagram
HOLD
W
D
C
S
V CC
V SS
Table 2.
M95xxx
and
Figure
Q
AI01789C
2..
Figure 3. DIP, SO and TSSOP Connections
Note: See
Table 2. Signal Names
C
D
Q
S
W
HOLD
V
V
CC
SS
sions, and how to identify pin-1.
PACKAGE MECHANICAL
V SS
Serial Clock
Serial Data Input
Serial Data Output
Chip Select
Write Protect
Hold
Supply Voltage
Ground
W
Q
S
1
2
3
4
M95xxx
AI01790D
8
7
6
5
section for package dimen-
M95256, M95128
V CC
HOLD
C
D
5/39