M24512
Figure 2A. DIP Connections
M24512
E0
E1
E2
VSS
1
2
3
4
8 VCC
7 WC
6 SCL
5 SDA
AI02276
Figure 2B. SO Connections
M24512
NC
NC
E0
E1
E2
VSS
NC
NC
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
AI02286
NC
NC
VCC
WC
SCL
SDA
NC
NC
Note: 1. NC = Not Connected
serial interface that uses a bi-directional data bus
and serial clock. The memory carries a built-in 4-
bit unique Device Type Identifier code (1010) in
accordance with the I2C bus definition.
The memory behaves as a slave device in the I2C
protocol, with all memory operations synchronized
by the serial clock. Read and Write operations are
initiated by a START condition, generated by the
bus master. The START condition is followed by a
Device Select Code and RW bit (as described in
Table 3), terminated by an acknowledge bit.
When writing data to the memory, the memory in-
serts an acknowledge bit during the 9th bit time,
following the bus master’s 8-bit transmission.
When data is read by the bus master, the bus
master acknowledges the receipt of the data byte
in the same way. Data transfers are terminated by
a STOP condition after an Ack for WRITE, and af-
ter a NoAck for READ.
Power On Reset: VCC Lock-Out Write Protect
In order to prevent data corruption and inadvertent
write operations during power up, a Power On Re-
set (POR) circuit is included. The internal reset is
held active until the VCC voltage has reached the
POR threshold value, and all operations are dis-
abled – the device will not respond to any com-
mand. In the same way, when VCC drops from the
operating voltage, below the POR threshold value,
all operations are disabled and the device will not
respond to any command. A stable and valid VCC
must be applied before applying any logic signal.
Table 2. Absolute Maximum Ratings 1
Symbol
Parameter
Value
Unit
TA Ambient Operating Temperature
-40 to 125
°C
TSTG
Storage Temperature
-65 to 150
°C
TLEAD
Lead Temperature during Soldering
PSDIP8: 10 sec
SO8: 40 sec
260
215
°C
VIO Input or Output range
-0.6 to 6.5
V
VCC Supply Voltage
-0.3 to 6.5
V
VESD
Electrostatic Discharge Voltage (Human Body model) 2
Electrostatic Discharge Voltage (Machine model) 3
4000
500
V
V
Note: 1. Except for the rating “Operating Temperature Range”, stresses above those listed in the Table “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only, and operation of the device at these or any other conditions
above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-
tions for extended periods may affect device reliability. Refer also to the ST SURE Program and other relevant quality documents.
2. MIL-STD-883C, 3015.7 (100 pF, 1500 Ω)
3. EIAJ IC-121 (Condition C) (200 pF, 0 Ω)
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