M48T513Y-85PM1 查看數據表（PDF） - STMicroelectronics
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M48T513Y-85PM1 Datasheet PDF : 23 Pages
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M48T513Y, M48T513V
Figure 2. DIP Connections
RST
RSTIN
A18
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
36 VCC
2
35 WDI
3
34 IRQ/FT
4
33 A15
5
32 A17
6
31
7
30
8
29
M48T513Y
9 M48T513V 28
10
27
11
26
12
25
13
24
14
23
15
22
16
21
17
20
W
A13
A8
A9
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
18
19 DQ3
AI02307
Table 1. Signal Names
A0-A18
Address Inputs
DQ0-DQ7
Data Inputs / Outputs
E
Chip Enable Input
G
Output Enable Input
W
Write Enable Input
WDI
Watchdog input
RST
Reset Output (open drain)
RSTIN
Reset Input
IRQ/FT
Interrupt / Frequency Test
Output (open drain)
VCC
Supply Voltage
VSS
Ground
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)
–40 to 85
°C
VIO
Input or Output Voltages
–0.3 to VCC +0.3
V
VCC
Supply Voltage
M48T513Y
M48T513V
–0.3 to 7.0
V
–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.
DESCRIPTION
The M48T513Y/V TIMEKEEPER RAM is a 512Kb
x 8 non-volatile static RAM and real time clock,
with programmable alarms and a watchdog timer.
The special DIP package provides a fully integrat-
ed battery back-up memory and real time clock so-
lution. The M48T513Y/V directly replaces industry
standard 512Kb x 8 SRAM. It also provides the
non-volatility of Flash without any requirement for
special write timing or limitations on the number of
writes that can be performed.
For surface mount environments ST provides a
Chip Set solution consisting of a 44 pin 330mil
SOIC TIMEKEEPER Supervisor (M48T201V/Y)
and a 32 pin TSOP Type II (10 x 20mm) LPSRAM
(M68Z512/W) packages.
The 44 pin 330mil SOIC provides sockets with
gold plated contacts at both ends for direct con-
nection to a separate SNAPHAT housing contain-
ing the battery.
2/23
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