參數(shù)資料
型號(hào)： M48T248Y-85PM1TR
廠商： STMICROELECTRONICS
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 0 TIMER(S), REAL TIME CLOCK, PDIP32
封裝： PLASTIC, MODULE, DIP-32
文件頁(yè)數(shù)： 22/24頁(yè)
文件大?。?/td> 532K
代理商： M48T248Y-85PM1TR
Obsolete
Product(s)
- Obsolete
Product(s)
7/24
M48T248Y, M48T248V
WRITE
WRITE
Mode
(see
and
7., page 8) occurs whenever CE and WE signals
are low (after address inputs are stable). The most
recent falling edge of CE and WE will determine
when the WRITE cycle begins (the earlier, rising
edge of CE or WE determines cycle termination).
All address inputs must be kept stable throughout
the WRITE cycle. WE must be high (inactive) for a
minimum recovery time (tWR) before a subsequent
cycle is initiated. The OE control signal should be
kept high (inactive) during the WRITE cycles to
avoid bus contention. If CE and OE are low (ac-
tive), WE will disable the outputs for Output Data
WRITE Time (tODW) from its falling edge.
Figure 6. Memory WRITE Cycle 1
Note: 1. OE = VIH or VIL. If OE = VIH during a WRITE cycle, the output buffers remain in a high impedance state.
2. If the CE low transition occurs simultaneously with or later than the WE low transition in WRITE Cycle 1, the output buffers remain
in a high impedance state during this period.
3. If the CE high transition occurs simultaneously with the WE high transition, the output buffers remain in a high impedance state
during this period.
AI04231
DQ0–DQ7
ADDRESSES
WE
CE
DATA IN
STABLE
tWR
tOEW
tDH
tDS
tWC
tODW
tWP
tAW
HIGH IMPEDANCE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
M48T251V-85PM1 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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