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參數(shù)資料
| 型號： | M41ST95WMX6 |
| 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, PDSO28 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 15/35頁 |
| 文件大?。?/td> | 735K |
| 代理商： | M41ST95WMX6 |
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Obsolete
Product(s)
- Obsolete
Product(s)
M41ST95Y*, M41ST95W
22/35
Power-fail INPUT/OUTPUT
The Power-Fail Input (PFI) is compared to an in-
ternal reference voltage (1.25V). If PFI is less than
the power-fail threshold (VPFI), the Power-Fail
Output (PFO) will go low. This function is intended
for use as an under-voltage detector to signal a
failing power supply. Typically PFI is connected
through an external voltage divider (see Figure 17)
to either the unregulated DC input (if it is available)
or the regulated output of the VCC regulator. The
voltage divider can be set up such that the voltage
at PFI falls below VPFI several milliseconds before
the regulated VCC input to the M41ST95Y/W or the
microprocessor drops below the minimum operat-
ing voltage.
During battery back-up, the power-fail comparator
turns off and PFO goes (or remains) low. This oc-
curs after VCC drops below VPFD(min). When pow-
er returns, PFO is forced high, irrespective of VPFI
for the write protect time (tREC), which is the time
from VPFD(max) until the inputs are recognized. At
the end of this time, the power-fail comparator is
enabled and PFO follows PFI. If the comparator is
unused, PFI should be connected to VSS and PFO
left unconnected.
Figure 17. Power-Fail Comparator Hookup
Note: 1. Available only in 28-pin, 300mil SOIC (MX) package.
AI06373
VCC
VOUT
VCC
PFO
SDI
SCL
M41ST95Y/W
WDI
RSTIN2
RSTIN1
PFI
VSS
VBAT
IRQ/FT/OUT
SQW
RST
SDO
Unregulated
Voltage
Regulator
VCC
VIN
E
EX
ECON
Pushbutton
Reset
From
MCU
To RST
To LED Display
To NMI
To INT
F32k
(1)
R1
R2
VCC
E
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M41ST95YMH6E | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M41ST95YMH6 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M41ST95YMX6 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M41T00CAPPC1 | REAL TIME CLOCK, PDIP24 |
| M41T0DW6F | REAL TIME CLOCK, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41ST95WMX6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMX6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMX6TR | 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 |
| M41ST95Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95YMH6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
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