- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67775 > M48T251Y-70PM1 (STMICROELECTRONICS) 0 TIMER(S), REAL TIME CLOCK, PDIP32 PDF資料下載
參數(shù)資料
| 型號： | M48T251Y-70PM1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)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)： | 22/24頁 |
| 文件大小： | 366K |
| 代理商： | M48T251Y-70PM1 |
7/24
M48T251Y, M48T251V
WRITE
WRITE Mode (see Figure 6.) 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 (active), WE will disable the out-
puts 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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T35Y-70PC6 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| M5M80C85AP-2 | 8-BIT, 5 MHz, MICROPROCESSOR, PDIP40 |
| M5M82C55AFP-2 | 24 I/O, PIA-GENERAL PURPOSE, PDSO40 |
| M5M82C55AP-2 | 24 I/O, PIA-GENERAL PURPOSE, PDIP40 |
| M5M82C55AJ-2 | 24 I/O, PIA-GENERAL PURPOSE, PQCC44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T251Y-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 |
| M48T251Y-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 |
| M48T251Y-85PM1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251YPM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T254V-10ZA1 | 功能描述:實時時鐘 16M (2Mx8) 100ns RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。