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M48T251Y Datasheet(PDF) 5 Page - STMicroelectronics

Part # M48T251Y
Description  5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM
PDF  24 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T251Y Datasheet(HTML) 5 Page - STMicroelectronics

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M48T251Y, M48T251V
Figure 3. DIP Connections
Figure 4. Block Diagram
VCC
CE
M48T251Y
M48T251V
DQ3
DQ4
DQ5
DQ6
DQ7
A0
A1
A2
A3
OE
WE
A16
A17
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
32
31
DQ1
DQ2
VSS
DQ0
A10
A11
A9
A8
A13
A15
A14
A12
A4
A6
A5
A7
A18/RST
AI04239
UPDATE
DQ0
VCC
VBAT
DATA
INTERNAL VCC
READ
WRITE
32.768 Hz
CRYSTAL
XI
XO
POWER
FAIL
A0–A16
DQ0–DQ7
CLOCK/CALENDAR
LOGIC
TIMEKEEPER
REGISTER
SRAM
CONTROL
LOGIC
ACCESS
ENABLE
SEQUENCE
DETECTOR
COMPARISON
REGISTER
I/O
BUFFERS
POWER-FAIL
DETECT
LOGIC
RST
WE
OE
CE
AI04238



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