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參數(shù)資料
| 型號： | M41ST87WMX6T |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)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)： | 24/38頁 |
| 文件大?。?/td> | 552K |
| 代理商： | M41ST87WMX6T |
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M41ST87Y, M41ST87W
30/38
Power-on Reset
The M41ST87Y/W continuously monitors VCC.
When VCC falls to the power fail detect trip point,
the RST pulls low (open drain) and remains low on
power-up for tREC after VCC passes VPFD(max).
The RST pin is an open drain output and an appro-
priate pull-up resistor should be chosen to control
rise time.
Note: A Power-on Reset will result in resetting the
following control bits to '0': OFIE, AFE, ABE,
SQWE, FT, WDS, BMB0-BMB4, RB0, RB1, TIE1,
and TIE2 (see Table 17, page 33).
Reset Inputs (RSTIN1 & RSTIN2)
The M41ST87Y/W provides two independent in-
puts which can generate an output reset. The
function of these resets is identical to a reset gen-
illustrate the AC reset characteristics of this func-
tion. Pulses shorter than tR1 and tR2 will not gener-
ate a reset condition. RSTIN1 and RSTIN2 are
each internally pulled up to VCC through a 100k
resistor.
Figure 25. RSTIN1 & RSTIN2 Timing Waveforms
Table 14. Reset AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V or 2.7 to 3.6V (except where noted).
2. Pulse widths of less than 100ns will result in no RESET (for noise immunity).
3. Programmable (see Table 16, page 32). Same function as Power-on Reset.
Symbol
Parameter(1)
Min
Max
Unit
tR1
(2)
RSTIN1 Low to RST Low (min pulse width)
100
200
ns
tR2
(2)
RSTIN2 Low to RSTIN2 High (min pulse width)
100
200
ns
tREC
(3)
RSTIN1 or RSTIN2 High to RST High
96
98(3)
ms
AI07072
RSTIN1
RST
RSTIN2
tR1
tREC
Hi-Z
tR2
tREC
Hi-Z
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41ST87WMX6TR | 功能描述:實時時鐘 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:實時時鐘 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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