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ST Microelectronics |
M95040
M95020, M95010
4Kbit, 2Kbit and 1Kbit Serial SPI Bus EEPROM
With High Speed Clock
FEATURES SUMMARY
s Compatible with SPI Bus Serial Interface
(Positive Clock SPI Modes)
s Single Supply Voltage:
– 4.5V to 5.5V for M950x0
– 2.5V to 5.5V for M950x0-W
– 1.8V to 3.6V for M950x0-S
s 5 MHz Clock Rate (maximum)
s Status Register
s BYTE and PAGE WRITE (up to 16 Bytes)
s Self-Timed Programming Cycle
s Adjustable Size Read-Only EEPROM Area
s Enhanced ESD Protection
s More than 1,000,000 Erase/Write Cycles
s More than 40 Year Data Retention
Figure 1. Packages
8
1
PDIP8 (BN)
8
1
SO8 (MN)
150 mil width
TSSOP8 (DW)
169 mil width
July 2003
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M95040, M95020, M95010
SUMMARY DESCRIPTION
The M95040 is a 4 Kbit (512 x 8) electrically eras-
able programmable memory (EEPROM), access-
ed by a high speed SPI-compatible bus. The other
members of the family (M95020, M95010) are
identical, though proportionally smaller (2 and 1
Kbit, respectively).
Each device is accessed by a simple serial
interface that is SPI-compatible. The bus signals
are C, D and Q, as shown in Table 1 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). WRITE instruc-
tions are disabled by Write Protect (W).
Figure 2. Logic Diagram
VCC
Figure 3. DIP, SO and TSSOP Connections
M95xxx
S1
Q2
8 VCC
7 HOLD
W3
6C
VSS 4
5D
AI01790D
Note: 1. See page 28 (onwards) for package dimensions, and how
to identify pin-1.
D
C
S
W
HOLD
M95xxx
VSS
Q
AI01789C
Table 1. 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
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