M48T18-100PC Ver la hoja de datos (PDF) - STMicroelectronics
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M48T18-100PC Datasheet PDF : 73 Pages
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M48T08, M48T18
Figure 2A. DIP Pin Connections
INT 1
A12 2
28 VCC
27 W
A7 3
26 E2
A6 4
25 A8
A5 5
24 A9
A4 6
23 A11
A3 7 M48T08 22 G
A2 8 M48T18 21 A10
A1 9
20 E1
A0 10
19 DQ7
DQ0 11
18 DQ6
DQ1 12
17 DQ5
DQ2 13
16 DQ4
VSS 14
15 DQ3
AI01182
Figure 2B. SO Pin Connections
INT
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
28
2
27
3
26
4
25
5
24
6
23
7 M48T08 22
8 M48T18 21
9
20
10
19
11
18
12
17
13
16
14
15
AI01021B
VCC
W
E2
A8
A9
A11
G
A10
E1
DQ7
DQ6
DQ5
DQ4
DQ3
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
TA
Ambient Operating Temperature
0 to 70
°C
TSTG
Storage Temperature (VCC Off, Oscillator Off)
–40 to 85
°C
VIO
Input or Output Voltages
–0.3 to 7
V
VCC
Supply Voltage
–0.3 to 7
V
IO
Output Current
20
mA
PD
Power Dissipation
1
W
Note: Stresses greater than those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this
specification is not implied. Exposure to the absolute maximum ratings conditions for extended periods of time may affect reliability.
CAUTION: Negative undershoots below –0.3 volts are not allowed on any pin while in the Battery Back-up mode.
Table 3. Operating Modes
Mode
VCC
E1
E2
G
W
DQ0-DQ7
Power
Deselect
VIH
X
X
X
High Z
Standby
Deselect
4.75V to 5.5V
X
VIL
X
X
High Z
or
Write
4.5V to 5.5V
VIL
VIH
X
VIL
DIN
Standby
Active
Read
VIL
VIH
VIL
VIH
DOUT
Active
Read
VIL
VIH
VIH
VIH
High Z
Active
Deselect VSO to VPFD (min)
X
X
X
X
High Z
CMOS Standby
Deselect
Note: X = VIH or VIL
≤ VSO
X
X
X
X
High Z Battery Back-up Mode
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