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M48T212A Datasheet(PDF) 3 Page - STMicroelectronics

Part # M48T212A
Description  3.3V TIMEKEEPER CONTROLLER
PDF  20 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T212A Datasheet(HTML) 3 Page - STMicroelectronics

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M48T212A
Table 2. Absolute Maximum Ratings (1)
Note: 1. 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 rating conditions for extended periods of time may affect
reliability.
2. Soldering temperature not to exceed 260°C for 10 seconds (total thermal budget not to exceed 150°C for longer than 30 seconds).
CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode.
Table 3. Operating Modes (1)
Note: 1. X = VIH or VIL.
2. VSO = Battery Back-up Switchover Voltage. (See Table 7 for details).
Table 4. Truth Table for SRAM Bank Select (1)
Note: 1. X = VIH or VIL.
2. VSO = Battery Back-up Switchover Voltage. (See Table 7 for details).
Symbol
Parameter
Value
Unit
TA
Ambient Operating Temperature
0 to 70
°C
TSTG
Storage Temperature (VCC Off, Oscillator Off)
–55 to 125
°C
TSLD
(2)
Lead Solder Temperature for 10 sec
260
°C
VIO
Input or Output Voltages
–0.3 to 4.6
V
VCC
Supply Voltage
–0.3 to 4.6
V
IO
Output Current
20
mA
PD
Power Dissipation
1
W
Mode
VCC
E
G
W
DQ7-DQ0
Power
Deselect
3.0V to 3.6V
VIH
X
X
High-Z
Standby
Write
VIL
X
VIL
DIN
Active
Read
VIL
VIL
VIH
DOUT
Active
Read
VIL
VIH
VIH
High-Z
Active
Deselect
VSO to VPFD (min)
(2)
X
X
X
High-Z
CMOS Standby
Deselect
≤ VSO (2)
X
X
X
High-Z
Battery Back-Up
Mode
VCC
EX
A
E1CON
E2CON
Power
Select
3.0V to 3.6V
Low
Low
Low
High
Active
Low
High
High
Low
Active
Deselect
High
X
High
High
Standby
Deselect
VSO to VPFD (min)
(2)
X
X
High
High
CMOS Standby
Deselect
≤ VSO (2)
X
X
High
High
Battery Back-Up



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