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参数资料
| 型号： | M48T251V-70PM1TR |
| 厂商： | 意法半导体 |
| 英文描述： | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| 中文描述： | 5.0或3.3V，4096K与幻象计时器的SRAM |
| 文件页数： | 7/24页 |
| 文件大小： | 366K |
| 代理商： | M48T251V-70PM1TR |
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 (t
WR
)
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 (t
ODW
) from its
falling edge.
Figure 6. Memory WRITE Cycle 1
Note: 1. OE = V
IH
or V
IL
. If OE = V
IH
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
相关PDF资料 |
PDF描述 |
|---|---|
| M48T251V-85PM1 | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-85PM1TR | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251VPM | 5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T35AYMH | ER 5C 5#16 PIN PLUG |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T251V-85PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251V-85PM1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251VPM | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251Y | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 4096K TIMEKEEPER SRAM with PHANTOM |
| M48T251Y-70PM1 | 功能描述:实时时钟 4M (512Kx8) 70ns RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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