Datasheet

Description M95128-W M95128-R M95128-DF
6/49 Doc ID 5798 Rev 16
1 Description
The M95128 devices are Electrically Erasable PROgrammable Memories (EEPROMs)
organized as 16384 x 8 bits, accessed through the SPI bus.
The M95128-W can operate with a supply voltage from 2.5 V to 5.5 V, the M95128-R can
operate with a supply voltage from 1.8 V to 5.5 V, and the M95128-DF can operate with a
supply voltage from 1.7 V to 5.5 V, over an ambient temperature range of -40 °C / +85 °C.
The M95128-DF offers an additional page, named the Identification Page (64 bytes). The
Identification Page can be used to store sensitive application parameters which can be
(later) permanently locked in Read-only mode.
Figure 1. Logic diagram
The SPI bus signals are C, D and Q, as shown in Figure 1 and Tabl e 1 . The device is
selected when Chip Select (S
) is driven low. Communications with the device can be
interrupted when the HOLD
is driven low.
Table 1. Signal names
Signal name Function Direction
C Serial Clock Input
D Serial Data Input Input
Q Serial Data Output Output
S
Chip Select Input
W
Write Protect Input
HOLD
Hold Input
V
CC
Supply voltage
V
SS
Ground
AI01789C
S
V
CC
M95xxx
HOLD
V
SS
W
Q
C
D