- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69016 > M41T81MQ6 (STMICROELECTRONICS) 1 TIMER(S), REAL TIME CLOCK, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | M41T81MQ6 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 179K |
| 代理商： | M41T81MQ6 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁當前第23頁第24頁第25頁第26頁第27頁第28頁
M41T81
4/28
SUMMARY DESCRIPTION
The M41T81 Serial Access TIMEKEEPER SRAM
is a low power 512 bit static CMOS SRAM orga-
nized as 64 words by 8 bits. A built-in 32.768 KHz
oscillator (external crystal controlled) and 8 bytes
of the SRAM (see Table 10, page 16) are used for
the clock/calendar function and are configured in
binary coded decimal (BCD) format. An additional
12 bytes of RAM provide status/control of Alarm,
Watchdog and Square Wave functions. Address-
es and data are transferred serially via a two line,
bi-directional I2C interface. The built-in address
register is incremented automatically 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-volatile, time-of-day clock/calendar, Alarm in-
terrupts, Watchdog Timer and programmable
Square Wave output. The eight clock address lo-
cations contain the century, year, month, date,
day, hour, minute, second and tenths/hundredths
of a second in 24 hour BCD format. Corrections
for 28, 29 (leap year - valid until year 2100), 30 and
31 day months are made automatically. The ninth
clock address location controls user access to the
clock information and also stores the clock soft-
ware calibration setting.
The M41T81 is supplied in either a 28 lead SOIC
SNAPHAT package (which integrates both crystal
and battery in a single SNAPHAT top) or a 16 pin
SOIC. The 28 pin 330mil SOIC provides sockets
with gold plated contacts at both ends for direct
connection to a separate SNAPHAT housing con-
taining the battery and crystal. The unique design
allows the SNAPHAT battery/crystal package to
be mounted on top of the SOIC package after the
completion of the surface mount process.
Insertion of the SNAPHAT housing after reflow
prevents potential battery and crystal damage due
to the high temperatures required for device sur-
face-mounting.
The SNAPHAT housing is also
keyed to prevent reverse insertion.
The SOIC and battery/crystal packages are
shipped separately in plastic anti-static tubes or in
Tape & Reel form. For the 28 lead SOIC, the bat-
tery/crystal package (i.e. SNAPHAT) part number
is “M4TXX-BR12SH” (see Table 14, page 22).
Caution: Do not place the SNAPHAT battery/crys-
tal top in conductive foam, as this will drain the lith-
ium button-cell battery.
Figure 2. Logic Diagram
Note: 1. For SO16 package only.
Table 1. Signal Names
Note: 1. For SO16 package only
SCL
VCC
M41T81
VSS
SDA
IRQ/FT/OUT/SQW
VBAT(1)
XI(1)
XO(1)
AI04613
XI(1)
Oscillator Input
XO(1)
Oscillator Output
IRQ/OUT/
FT/SQW
Interrupt / Output Driver / Frequency
Test (Open Drain)
Square Wave (CMOS)
SDA
Serial Data Input/Output
SCL
Serial Clock Input
VBAT
(1)
Battery Supply Voltage
VCC
Supply Voltage
VSS
Ground
相關PDF資料 |
PDF描述 |
|---|---|
| M41T81MQ6TR | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| M41T81MY6F | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T81MY6E | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T94MQ6TR | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| M44C092-H | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M41T81MX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MX6 | 功能描述:實時時鐘 Serial 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T81MX6TR | 功能描述:實時時鐘 Serial 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T81MY | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MY6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
發(fā)布緊急采購，3分鐘左右您將得到回復。