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參數(shù)資料
| 型號： | M41ST84W |
| 廠商： | 意法半導體 |
| 英文描述： | 3.0/3.3V I2C Serial RTC with Supervisory Functions(帶監(jiān)視功能的3.0/3.3V I2C串行RTC) |
| 中文描述： | 3.0/3.3V I2C串行實時時鐘具有監(jiān)督職能（帶監(jiān)視功能的3.0/3.3V的I2C串行時鐘） |
| 文件頁數(shù)： | 1/29頁 |
| 文件大?。?/td> | 481K |
| 代理商： | M41ST84W |
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January 2006
M41ST84W
3.0/3.3V I
2
C Serial RTC
with Supervisory Functions
Rev 7.0
KEY FEATURES
■
AUTOMATIC BATTERY SWITCHOVER and
DESELECT
–
Power-fail Deselect, V
PFD
= 2.60V (nom)
–
Switchover, V
SO
= 2.50V (nom)
400kHz I
2
C SERIAL INTERFACE
3.0/3.3V OPERATING VOLTAGE
–
V
CC
= 2.7 to 3.6V
ULTRA-LOW BATTERY SUPPLY CURRENT
of 500nA (max)
RoHS COMPLIANCE
Lead-free components are compliant with the
RoHS Directive.
■
■
■
■
Serial RTC Features
400kHz I
2
C
44 Bytes of General Purpose NVRAM
Counters for:
–
Seconds, Minutes, Hours, Day, Date,
Month, and Year
–
Century
–
10ths/100ths of Seconds
–
Clock Calibration register allows
compensation for crystal variations over
temperature
Programmable Alarm with Interrupt
–
Functions during Battery Back-up Mode
Power-down Timestamp (HT Bit)
2.5 to 5.5V Oscillator Operating Voltage
32KHz Oscillator with Integrated Load
Capacitance (12.5pF)
■
■
■
■
■
■
■
Microprocessor Supervisory Features
■
Programmable Watchdog Timer
–
62.5ms to 128s time-out period
Power-on Reset/Low Voltage Detect Output
PFI/PFO with 1.25V Reference
■
■
Figure 1. 16-pin SOIC Package
NVRAM Supervisory Features
■
Non-volatizes External LPSRAM
–
Automatically switches to back-up battery
and deselects (write-protects) external
LPSRAM via chip-enable gate
–
Power-fail deselect (write protect) voltage,
V
PFD
= 2.60V (nom)
–
Switchover , V
SO
= 2.50V (nom)
Battery Low flag
■
Other Features
■
Programmable Squarewave Generator (1Hz
to 32KHz)
–40°C to +85°C Operation
Packaged in a 16-lead SOIC
■
■
16
1
SO16 (MQ)
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| M41ST85WMH6E | 3.0/3.3V I2C Combination Serial RTC, NVRAM Supervisor and Microprocessor Supervisor |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M41ST84W_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.0/3.3 V I2C serial RTC with 44 bytes of NVRAM and supervisory functions |
| M41ST84WMH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84WMH1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84WMH1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84WMQ | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
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