
SDA
VSS
SCL
MODE/WC
PB0
PB1
PRE
VCC
AI00867B
ST24x16
ST25x16
1
2
3
4
8
7
6
5
Figure 2A. DIP Pin Connections
1
2
3
4
AI00500B
8
7
6
5
SDA
VSS
SCL
MODE/WC
PB0
PB1
PRE
VCC
ST24x16
ST25x16
Figure 2B. SO8 Pin Connections
ance of one million erase/write cycles with a data
retention of 40 years. The ST25x16 operates with
a power supply value as low as 2.5V. Both Plastic
Dual-in-Line and Plastic Small Outline packages
are available.
The memories are compatible with the I
2
C stand-
ard, two wire serial interface which uses a bi-direc-
tional data bus and serial clock. The memories
DESCRIPTION
(cont’d)
carry a built-in 4 bit, unique device identification
code (1010) corresponding to the I
2
C bus defini-
tion. The memories behave as slave devices in the
I
2
C protocol with all memory operations synchro-
nized 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
stream of 4 bits (identification code 1010), 3 block
select bits, plus one read/write bit and terminated
by an acknowledge bit. When writing data to the
Symbol
Parameter
Value
Unit
T
A
Ambient Operating Temperature
–40 to 125
°
C
T
STG
Storage Temperature
–65 to 150
°
C
T
LEAD
Lead Temperature, Soldering
(SO8)
(PSDIP8)
40 sec
10 sec
215
260
°
C
V
IO
Input or Output Voltages
–0.6 to 6.5
V
V
CC
Supply Voltage
–0.3 to 6.5
V
V
ESD
Electrostatic Discharge Voltage (Human Body model)
(2)
4000
V
Electrostatic Discharge Voltage (Machine model)
(3)
500
V
Notes:
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 conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and
other relevant quality documents.
2. 100pF through 1500
; MIL-STD-883C, 3015.7
3. 200pF through 0
; EIAJ IC-121 (condition C)
Table 2. Absolute Maximum Ratings
(1)
2/17
ST24/25C16, ST24/25W16