M48T212Y-85MH1(2000) Просмотр технического описания (PDF) - STMicroelectronics
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M48T212Y-85MH1 Datasheet PDF : 23 Pages
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M48T212Y, M48T212V
Table 2. Absolute Maximum Ratings (1)
Symbol
Parameter
Value
Unit
TA
Ambient Operating Temperature
0 to 70
°C
TSTG
Storage Temperature (VCC Off, Oscillator Off) SNAPHAT
SOIC
–40 to 85
–55 to 125
°C
TSLD (2)
Lead Solder Temperature for 10 sec
260
°C
VIO
Input or Output Voltages
–0.3 to VCC +0.3
V
VCC
Supply Voltage
M48T212Y
M48T212V
–0.3 to 7
–0.3 to 4.6
V
IO
Output Current
20
mA
PD
Power Dissipation
1
W
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.
CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPH AT sockets.
Table 3. Operating Modes (1)
Mode
VCC
E
G
W
Deselect
VIH
X
X
Write
Read
4.5V to 5.5V
or
3.0V to 3.6V
VIL
X
VIL
VIL
VIL
VIH
Read
VIL
VIH
VIH
Deselect
VSO to VPFD (min) (2)
X
X
X
Deselect
≤ VSO (2)
X
X
X
Note: 1. X = VIH or VIL.
2. VSO = Battery Back-up Swit chover Voltage. (See Tables 7A and 7B for details).
DQ7-DQ0
High-Z
DIN
DOUT
High-Z
High-Z
High-Z
Power
Standby
Active
Active
Active
CMOS Standby
Battery Back-Up
Table 4. Truth Table for SRAM Bank Select (1)
Mode
VCC
EX
A
E1CON
Select
Deselect
4.5V to 5.5V
or
3.0V to 3.6V
Low
Low
High
Low
High
X
Low
High
High
Deselect
VSO to VPFD (min) (2)
X
X
High
Deselect
≤ VSO (2)
X
X
High
Note: 1. X = VIH or VIL.
2. VSO = Battery Back-up Swit chover Voltage. (See Tables 7A and 7B for details).
E2CON
High
Low
High
High
High
Power
Active
Active
Standby
CMOS Standby
Battery Back-Up
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