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参数资料
| 型号： | M48T212V-85MH1E |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO44 |
| 封装： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-44 |
| 文件页数： | 3/35页 |
| 文件大小： | 348K |
| 代理商： | M48T212V-85MH1E |
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Product(s)
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Product(s)
M48T212V
Operation
Table 4.
Chip enable control and bank select characteristics
2.2
Read mode
The M48T212V executes a READ cycle whenever W (WRITE Enable) is high and E (Chip
Enable) is low. The unique address specified by the address inputs (A3-A0) defines which
one of the on-chip TIMEKEEPER registers is to be accessed. When the address
presented to the M48T212V is in the range of 0h-Fh, one of the on-board TIMEKEEPER
registers is accessed and valid data will be available to the eight data output drivers within
tAVQV after the address input signal is stable, providing that the E and G access times are
also satisfied.If they are not, then data access must be measured from the latter occurring
signal (E or G) and the limiting parameter is either tELQV for E or tGLQV for G rather than the
address access time.
When EX input is low, an external SRAM location will be selected.
Note:
Care should be taken to avoid taking both E and EX low simultaneously to avoid bus
contention.
Figure 5.
Read cycle timing: RTC control signal waveforms
Note:
EX is assumed high.
Symbol
Parameter
M48T212V
Unit
–85
Min
Max
tEXPD
EX to E1CON or E2CON (low or high)
15
ns
tAPD
A to E1CON or E2CON (low or high)
15
ns
AI02640
W
DQ7-DQ0
G
DATA OUT
VALID
ADDRESS
tAVAV
E
tELQV
tAVAV
READ
WRITE
DATA IN
VALID
DATA OUT
VALID
tAVQV
tWHAX
tAVWL
tELQX
tGLQV
tGHQZ
tWLWH
tAXQX
tGLQX
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212V-85MH1F | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| M48T212V-85MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-85MH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
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