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| 型號(hào)： | M48T254V-10ZA1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類(lèi)： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)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(yè)數(shù)： | 1/26頁(yè) |
| 文件大?。?/td> | 366K |
| 代理商： | M48T254V-10ZA1 |
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NOT FOR NEW DESIGN
November 2004
This is information on a product still in production but not recommended for new designs.
M48T254V
3.3V, 16 Mbit (2Mb x 8bit) TIMEKEEPER
SRAM with Phantom Clock
FEATURES SUMMARY
■
3.3V ± 10%
■
INTEGRATED ULTRA LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL
CONTROL CIRCUIT, BATTERY AND
CRYSTAL
■
REAL TIME CLOCK KEEPS TRACK OF
TENTHS/HUNDREDTHS OF SECONDS,
SECONDS, MINUTES, HOURS, DAYS,
DATE, MONTHS, and YEARS.
■
CLOCK FUNCTION IS TRANSPARENT TO
RAM OPERATION.
■
PRECISION POWER MONITORING and
POWER SWITCHING CIRCUITRY
■
AUTOMATIC WRITE-PROTECTION WHEN
VCC IS OUT-OF-TOLERANCE
■
POWER-FAIL DESELECT VOLTAGE:
–VCC = 3.3V ± 10%; 2.8V ≤ VPFD ≤ 2.97V
■
BATTERY LOW (BL)
■
10 YEARS of DATA RETENTION and CLOCK
OPERATION IN THE ABSENCE OF POWER
■
SNAPHAT HOUSING (BATTERY/CRYSTAL)
IS REPLACEABLE
■
100ns ACCESS (READ = WRITE)
Figure 1. 168-ball PBGA Module
Figure 2. SNAPHAT Crystal/Battery
M48T254V
168-ball PBGA
Module (ZA)
SNAPHAT (SH)
Crystal/Battery
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