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參數(shù)資料
| 型號： | M41ST87WMX6T |
| 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, PDSO28 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 33/38頁 |
| 文件大?。?/td> | 552K |
| 代理商： | M41ST87WMX6T |
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M41ST87Y, M41ST87W
4/38
SUMMARY DESCRIPTION
The M41ST87Y/W Serial TIMEKEEPER/Con-
troller SRAM is a low power 1280-bit, static CMOS
SRAM organized as 160 bytes by 8 bits. A built-in
32.768 kHz oscillator (internal crystal-controlled)
and 8 bytes of the SRAM (see Table 11, page 25)
are used for the clock/calendar function and are
configured in binary coded decimal (BCD) format.
An additional 11 bytes of RAM provide calibration,
status/control of Alarm, Watchdog, Tamper, and
Square Wave functions. 8 bytes of ROM and final-
ly 128 bytes of User RAM are also provided. Ad-
dresses and data are transferred serially via a two
line, bi-directional I2C interface. The built-in ad-
dress register is incremented automatically after
each WRITE or READ data byte. The M41ST87Y/
W has a built-in power sense circuit which detects
power failures and automatically switches to the
battery supply when a power failure occurs. The
energy needed to sustain the SRAM and clock op-
erations can be supplied by a small lithium button-
cell supply when a power failure occurs.
Functions available to the user include a non-vol-
atile, time-of-day clock/calendar, Alarm interrupts,
Tamper Detection, Watchdog Timer, and pro-
grammable Square Wave output. Other features
include a Power-On Reset as well as two addition-
al debounced inputs (RSTIN1 and RSTIN2) which
can also generate an output Reset (RST). The
eight clock address locations contain the century,
year, month, date, day, hour, minute, second and
tenths/hundredths of a second in 24 hour BCD for-
mat. Corrections for 28, 29 (leap year), 30 and 31
day months are made automatically.
Security Features
Two fully independent Tamper Detection Inputs al-
low monitoring of multiple locations within the sys-
tem. Programmable bits provide both, “Normally
Open” and “Normally Closed” switch monitoring.
Time Stamping of the tamper event is automatical-
ly provided. There is also an option allowing data
stored in either internal memory (128 bytes), and/
or external memory to be cleared, protecting sen-
sitive information in the event tampering occurs.
By embedding the 32kHz crystal in the package,
the clock is completely isolated from external tam-
pering. An Oscillator Fail Bit (OF) is also provided
to ensure correct operation of the oscillator.
The M41ST87Y/W is supplied in a 28-pin, 300mil
SOIC package (MX) which includes an embedded
32kHz crystal.
The SOIC package is shipped in plastic anti-static
tubes or in Tape & Reel form.
The 300mil, embedded crystal SOIC requires only
a user-supplied battery to provide non-volatile op-
eration.
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| M41T00SC64MY6E | REAL TIME CLOCK, PDSO18 |
| M41T00SM6F | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T00SMY6T | REAL TIME CLOCK, PDSO8 |
| M41T00 | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T0DS6E | REAL TIME CLOCK, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41ST87WMX6TR | 功能描述:實(shí)時(shí)時(shí)鐘 Serial 1280 (160x8) 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 |
| M41ST87WSS6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
| M41ST87WSS6F | 功能描述:實(shí)時(shí)時(shí)鐘 128 NVRAM Serial RTC 3.0 to 3.6 Vcc 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 |
| M41ST87Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection |
| M41ST87Y_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
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