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參數(shù)資料
| 型號： | M41T81MY6 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SERIAL ACCESS RTC WITH ALARMS |
| 中文描述： | 串行訪問時鐘用鬧鐘 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大?。?/td> | 386K |
| 代理商： | M41T81MY6 |
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M41T81
14/28
Data Retention Mode
With valid V
CC
applied, the M41T81 can be ac-
cessed as described above with READ or WRITE
Cycles. Should the supply voltage decay, the pow-
er input will be switched from the V
CC
pin to the
battery when V
CC
falls below the Battery Back-up
Switchover Voltage (V
SO
). At this time the clock
registers will be maintained by the attached bat-
tery supply. As V
CC
continues to fall, the M41T81
will pass through the Register Bit Reset Voltage
(V
RST
) threshold, not only write protecting itself,
but also resetting certain Control Bits (see Table
13, page 21). On power-up, when V
CC
returns to a
nominal value, write protection continues for t
REC
.
For a further, more detailed review of lifetime cal-
culations, please see Application Note AN1012.
Figure 17. Power Down/Up Mode AC Waveforms
Table 8. Power Down/Up AC Characteristics
Note: 1. V
CC
fall time should not exceed 5mV/μs.
2. Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 2.0 to 5.5V (except where noted).
Table 9. Power Down/Up Trip Points DC Characteristics
Note: 1. All voltages referenced to V
SS
.
2. Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 2.0 to 5.5V (except where noted).
Symbol
Parameter
(1,2)
Min
Typ
Max
Unit
t
PD
SCL and SDA at V
IH
before Power Down
0
nS
t
REC
SCL and SDA at V
IH
after Power Up
10
μS
Sym
Parameter
(1,2)
Min
Typ
Max
Unit
V
SO
Battery Back-up Switchover Voltage
V
BAT
– 0.80
V
BAT
– 0.50
V
BAT
– 0.30
V
V
RST
Register Bit Reset Voltage
1.1
2.0
V
AI00596
VCC
tREC
tPD
VSO
SDA
SCL
DON'T CARE
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相關(guān)代理商/技術(shù)參數(shù) |
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| M41T81MY6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
| M41T81S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock with alarms |
| M41T81S_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock with alarms |
| M41T81S_12 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock (RTC) with alarms |
| M41T81SM6E | 功能描述:實時時鐘 2.0-5.5V 512 (64x8) 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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