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參數(shù)資料
| 型號： | M41T81MY6TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| 封裝： | 0.300 INCH, PLASTIC, SO-18 |
| 文件頁數(shù)： | 25/30頁 |
| 文件大?。?/td> | 436K |
| 代理商： | M41T81MY6TR |
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M41T81
4/30
SUMMARY DESCRIPTION
The
M41T81
Serial
Access
TIMEKEEPER
SRAM is a low power Serial RTC with a built-in
32.768kHz oscillator (external crystal controlled).
Eight bytes of the SRAM (see Table 2., page 13)
are used for the clock/calendar function and are
configured in binary coded decimal (BCD) format.
An additional 12 bytes of SRAM provide status/
control of Alarm, Watchdog and Square Wave
functions. Addresses and data are transferred se-
rially via a two line, bi-directional I2C interface. The
built-in address register is incremented automati-
cally after each WRITE or READ data byte.
The M41T81 has a built-in power sense circuit
which detects power failures and automatically
switches to the battery supply when a power fail-
ure occurs. The energy needed to sustain the
SRAM and clock operations can be supplied by a
small lithium button supply when a power failure
occurs.
Functions available to the user include a non-vol-
atile, time-of-day clock/calendar, Alarm interrupts,
Watchdog Timer and programmable
Square
Wave output. The eight clock address locations
contain the century, year, month, date, day, hour,
minute, second and tenths/hundredths of a sec-
ond in 24 hour BCD format. Corrections for 28, 29
(leap year - valid until year 2100), 30 and 31 day
months are made automatically.
The M41T81 is supplied in either an 8-pin SOIC or
an 18-pin (MY) or 28-pin (MX), 300mil SOIC pack-
age which includes an embedded 32kHz crystal.
The 18-pin and 28-pin, embedded crystal SOIC re-
quires only a user-supplied battery to provide non-
volatile operation.
Figure 2. Logic Diagram
Note: 1. For SO8 package only.
Table 1. Signal Names
Note: 1. For SO8 package only.
SCL
VCC
M41T81
VSS
SDA
IRQ/FT/OUT/SQW
VBAT
XI
(1)
XO
(1)
AI04613
XI(1)
Oscillator Input
XO(1)
Oscillator Output
IRQ/OUT/
FT/SQW
Interrupt / Output Driver / Frequency
Test / Square Wave (Open Drain)
SDA
Serial Data Input/Output
SCL
Serial Clock Input
VBAT
Battery Supply Voltage
VCC
Supply Voltage
VSS
Ground
NC
No Connect
NF
No Function
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M41T81MX6 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M41T81SM6F | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T81SM6E | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T82RMY6E | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T82ZQA6E | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(shí)時(shí)時(shí)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(shí)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 |
| M41T81SM6ET | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
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