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参数资料
| 型号： | M48T248V |
| 厂商： | 意法半导体 |
| 英文描述： | 5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| 中文描述： | 5.0或3.3V，1024K与幻象计时器的SRAM |
| 文件页数： | 4/24页 |
| 文件大小： | 306K |
| 代理商： | M48T248V |
M48T248Y, M48T248V
4/24
SUMMARY DESCRIPTION
The M48T248Y/V TIMEKEEPER
RAM is a
128Kbit x 8 non-volatile static RAM and real time
clock organized as 131,072 words by 8 bits. The
special DIP package provides a fully integrated
battery back-up memory and real time clock solu-
tion. In the event of power instability or absence, a
self-contained battery maintains the timekeeping
operation and provides power for a CMOS static
RAM. Control circuitry monitors V
CC
and invokes
write protection to prevent data corruption in the
memory and RTC.
The clock keeps track of tenths/hundredths of sec-
onds, seconds, minutes, hours, day, date, month,
and year information. The last day of the month is
automatically adjusted for months with less than
31 days, including leap year correction.
The clock operates in one of two formats:
– a 12-hour mode with an AM/PM indicator; or
– a 24-hour mode
The M48T248Y/V is a 32-pin (PM) DIP module
that integrates the RTC, the battery, and SRAM in
one package.
The modules are shipped in plastic, anti-static
tubes (see Table 14, page 22).
Figure 2. Logic Diagram
Table 1. Signal Names
Figure 3. DIP Connections
A0-A16
VSS
DQ0-D7
M48T248Y
M48T248V
VCC
RST
WE
OE
CE
AI04661
A0–A16
Address Input
RST
Reset Input
CE
Chip Enable
OE
Output Enable Input
WE
WRITE Enable Input
DQ0–DQ7
Data Inputs/Outputs
V
CC
Supply Voltage Input
V
SS
Ground
VCC
A15
CE
M48T248Y
M48T248V
DQ3
DQ4
DQ5
DQ6
DQ7
A0
A1
A2
A3
OE
WE
A16
A14
NC
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
A12
A4
A6
A5
A7
RST
AI04662
相关PDF资料 |
PDF描述 |
|---|---|
| M48T248V-85PM1TR | 5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248VPM | 5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-70PM1 | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-70PM1TR | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-85PM1 | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T248V-70PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-70PM1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-85PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-85PM1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248VPM | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
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