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參數(shù)資料
| 型號： | M48T254V-10ZA1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | REAL TIME CLOCK, PBGA168 |
| 封裝： | 42.50 X 42.50 MM, 1.27 MM PITCH, BGA-168 |
| 文件頁數(shù)： | 21/26頁 |
| 文件大小： | 366K |
| 代理商： | M48T254V-10ZA1 |
M48T254V
4/26
SUMMARY DESCRIPTION
The M48T254V TIMEKEEPER RAM is a 2Mbit x
8 non-volatile static RAM and real time clock orga-
nized as 2,097,152 words by 8 bits. The special
BGA package provides a fully integrated battery
back-up memory and real time clock solution. In
the event of power instability or absence, a self-
contained battery maintains the timekeeping oper-
ation and provides power for a CMOS static RAM.
Control circuitry monitors VCC and invokes write
protection to prevent data corruption in the memo-
ry 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 M48T254V is a 168-ball PBGA module that in-
tegrates the RTC, the battery, and SRAM in one
package.
Figure 3. Logic Diagram
Table 1. Signal Names
AI04217
VCC
M48T254V
VSS
BL
A0 – A20
DQ0 – DQ7
WE
OE
CE
A0 - A20
Address Inputs
DQ0 - DQ7
Data Input/Output
CE
Chip Enable
WE
WRITE Enable Inputs
OE
Output Enable
BL
Battery Low Output (Open Drain)
NC
No Connect
VCC
Supply Voltage
VSS
Ground
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相關代理商/技術參數(shù) |
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| M48T30Y-100PM1 | 制造商:STMicroelectronics 功能描述: 制造商:STMicroelectronics 功能描述:Electronic Component |
| M48T35 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35_0708 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V, 256 Kbit (32 Kb x 8) TIMEKEEPER SRAM |
| M48T35_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5 V, 256 Kbit (32 Kb x 8) TIMEKEEPER? SRAM |
| M48T35_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5 V, 256 Kbit (32 Kb x 8) TIMEKEEPER?? SRAM |
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