Marantz SA-12S1, Service Manual

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175
SDA VSS
SCL
WC E1
E0 VCC
E2
AI01202B
ST24E32
ST25E32
1
2
3
4
8
7
6
5
Figure 2A. DIP Pin Connections
1
AI01203C
2
3
4
8
7
6
5 SDA VSS
SCL
WC E1
E0 VCC
E2
ST24E32
ST25E32
Figure 2B. SO Pin Connections
Each memory is compatible with the I
2
C extended
addressing standard, two wire serial interface
which uses a bi-directional data bus and serial
clock. The ST24/25E32carry a built-in 4 bit, unique
device identification code (1010) corresponding to
the I
2
C bus definition. The ST24/25E32 behave as
DESCRIPTION (cont'd) slave devices in the I
2
C 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 stream of 4 bits (identifi-
cation code 1010), 3 bit Chip Enable input to form
a 7 bit Device Select, plus one read/write bit and
terminated by an acknowledge bit.
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 SGS-THOMSON 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)
ST24E32, ST25E32