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參數(shù)資料
| 型號： | M41T00 |
| 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： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 96K |
| 代理商： | M41T00 |
Symbol
Parameter
Value
Unit
TA
Ambient Operating Temperature
–40 to 85
°C
TSTG
Storage Temperature (VCC Off, Oscillator Off)
–55 to 125
°C
VIO
Input or Output Voltages
–0.3 to 7
V
VCC
Supply Voltage
–0.3 to 7
V
IO
Output Current
20
mA
PD
Power Dissipation
0.25
W
Note: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of
this specification is not implied. Exposure to the absolute maximum rating conditions for extended periods of time may affect
reliability.
CAUTION: Negative undershoots below –0.3 volts are not allowed on any pin while in the Battery Back-up mode.
Table 2. Absolute Maximum Ratings
1
SDA
VSS
SCL
FT/OUT
OSCO
OSCI
VCC
VBAT
AI00531
M41T00
2
3
4
8
7
6
5
Figure 2. SOIC Pin Connections
The M41T00 clock has a built-in power sense
circuit which detects power failures and automat-
ically switches to the battery supply during power
failures. The energy needed to sustain the RAM
and clock operations can be supplied from a small
lithium coin cell.
Typical data retention time is in excess of 5 years
with a 50mA/h 3V lithium cell. The M41T00 is
supplied in 8 lead Plastic Small Outline package.
DESCRIPTION (cont’d)
OPERATION
The M41T00 clock operates as a slave device on
the serial bus. Access is obtained by implementing
a start condition followed by the correct slave ad-
dress (D0h). The 8 bytes contained in the device
can then be accessed sequentially in the following
order:
1.
Seconds Register
2.
Minutes Register
3.
Century/Hours Register
4.
Day Register
5.
Date Register
6.
Month Register
7.
Years Register
8.
Control Register
The M41T00 clock continually monitors VCC for an
out of tolerance condition. Should VCC fall below
VSO, the device terminates an access in progress
and resets the device address counter. Inputs to
the device will not be recognized at this time to
prevent erroneous data from being written to the
device from an out of tolerance system. When VCC
falls below VSO, the device automatically switches
over to the battery and powers down into an ultra
low current mode of operation to conserve battery
life. Upon power-up, the device switches from bat-
tery to VCC at VSO and recognizes inputs.
2/15
M41T00
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參數(shù)描述 |
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| M41T00_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial real-time clock |
| M41T00AUD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial real-time clock with audio |
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| M41T00AUDD1F | 功能描述:實時時鐘 SERIAL RTC W/AUDIO 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 |
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