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參數(shù)資料
| 型號： | M48T248Y-85PM1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| 封裝： | PLASTIC, MODULE, DIP-32 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大小： | 532K |
| 代理商： | M48T248Y-85PM1 |
Obsolete
Product(s)
- Obsolete
Product(s)
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 VCC 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
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
VCC
Supply Voltage Input
VSS
Ground
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M48T248Y-85PM1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248YPM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T251V | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-70PM1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-70PM1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
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