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參數資料
| 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： | 20/29頁 |
| 文件大?。?/td> | 481K |
| 代理商： | M41ST84W |
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M41ST84W
20/29
Power-on Reset
The M41ST84W continuously monitors V
CC
.
When V
CC
falls to the power fail detect trip point,
the RST pulls low (open drain) and remains low on
power-up for t
rec
after V
CC
passes V
PFD
(max).
The RST pin is an open drain output and an appro-
priate pull-up resistor should be chosen to control
rise time.
Reset Input (RSTIN)
The M41ST84W provides an independent input
which can generate an output reset. The duration
and function of this reset is identical to a reset gen-
erated by a power cycle.
Table 6., page 20
and
Figure 17., page 20
illustrate the AC reset charac-
teristics of this function. Pulses shorter than t
RLRH
will not generate a reset condition. RSTIN is inter-
nally pulled up to V
CC
through a 100k
resistor.
Figure 17. RSTIN Timing Waveform
Note: With pull-up resistor
Table 6. Reset AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 2.7 to 3.6V (except where noted).
2. Pulse width less than 50ns will result in no RESET (for noise immunity).
3. Programmable (see
Table 8., page 22
)
Symbol
Parameter
(1)
Min
Max
Unit
t
RLRH(2)
RSTIN Low to RSTIN High
200
ns
t
RHRSH(3)
RSTIN High to RST High
40
200
ms
AI03682
RST
(1)
RSTIN
tRLRH
tRHRSH
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| 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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