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M48T36 데이터 시트보기 (PDF) - STMicroelectronics
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M48T36
CMOS 32K x 8 TIMEKEEPER SRAM
STMicroelectronics
M48T36 Datasheet PDF : 17 Pages
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Figure 3. Block Diagram
IRQ/FT WDI
32,768 Hz
CRYSTAL
LITHIUM
CELL
OSCILLATOR AND
CLOCK CHAIN
8 x 8 BiPORT
SRAM ARRAY
POWER
BATTERY LOW
8 x 8 ALARM
WATCHDOG
FLAGS
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
VPFD
32,752 x 8
SRAM ARRAY
M48T36
A0-A14
DQ0-DQ7
E
W
G
VCC
RST
VSS
AI01626
Table 3. Operating Modes
(1)
Mode
V
CC
E
G
W
DQ0-DQ7
Power
Deselect
V
IH
X
X
High Z
Standby
Write
4.5V to 5.5V
V
IL
X
V
IL
D
IN
Active
Read
V
IL
V
IL
V
IH
D
OUT
Active
Read
V
IL
V
IH
V
IH
High Z
Active
Deselect V
SO
to V
PFD
(min)
(2)
X
X
X
High Z
CMOS Standby
Deselect
≤
V
SO
Notes
: 1. X = V
IH
or V
IL
2. See Table 6 for details.
X
X
X
High Z Battery Back-up Mode
3/17
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