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參數(shù)資料
| 型號： | MAX6917EO33 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | REAL TIME CLOCK, PDSO20 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, MO-137AD, QSOP-20 |
| 文件頁數(shù)： | 18/31頁 |
| 文件大小： | 349K |
| 代理商： | MAX6917EO33 |
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MAX6917
I2C-Compatible RTC with Microprocessor
Supervisor, Alarm, and NV RAM Controller
______________________________________________________________________________________
25
Chip-Enable Output
When the CE transmission gate is enabled, the imped-
ance seen at CE_OUT is equivalent to a 46
(typ)
resistor in series with the source driving CE_IN. In the
disabled mode, the transmission gate is off and an
active pullup connects CE_OUT to VOUT (see Figures
14, 16). This pullup turns off when the transmission
gate is enabled.
Test Configuration Register
This is a read-only register.
Data Valid Bit
DATA VALID has a POR setting of zero, indicating that
the data in the MAX6917 RTC is not guaranteed to be
valid (Table 1). A read of the status register sets the
DATA VALID bit to one, indicating valid data in the
MAX6917 RTC. In a system that uses a backup power
supply, the DATA VALID bit should be set to one by the
system software on first system power-up by reading the
status register. After that, any time the system recovers
from a reset condition caused by VCC < VRST, the DATA
VALID bit can be read to see if the data stored during
operation from the backup power supply is still valid (i.e.,
the backup power supply did not drop out). A one indi-
cates valid data and a zero indicates corrupted data.
Any time the internal supply to the MAX6917 (either
VBATT or VCC depending upon the operating conditions)
drops below 1.5V to 1.6V (typ), the DATA VALID bit is set
to zero even if it has recently been set by a read of the
status register.
VCC
RESET
CE_OUT
CE_IN
2.0V
VRST
tRP
VBATT
VCC
tCED
tRCE
tRPD
VRST
Figure 16. Chip-Enable Timing Diagram
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參數(shù)描述 |
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| MAX6917EO33+ | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
| MAX6917EO33+T | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
| MAX6917EO50 | 功能描述:實(shí)時時鐘 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 |
| MAX6917EO50+ | 功能描述:實(shí)時時鐘 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 |
| MAX6917EO50+T | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
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