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参数资料
| 型号： | MAX6917EO30 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO20 |
| 封装： | 0.150 INCH, 0.025 INCH PITCH, MO-137AD, QSOP-20 |
| 文件页数： | 18/31页 |
| 文件大小： | 349K |
| 代理商： | MAX6917EO30 |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6917EO30+ | 功能描述:实时时钟 Integrated Circuits (ICs) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| MAX6917EO30+T | 功能描述:实时时钟 Integrated Circuits (ICs) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| MAX6917EO33+ | 功能描述:实时时钟 Integrated Circuits (ICs) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| MAX6917EO33+T | 功能描述:实时时钟 Integrated Circuits (ICs) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| MAX6917EO50 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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