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參數(shù)資料
| 型號： | MAX6917EO50 |
| 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)： | 22/31頁 |
| 文件大?。?/td> | 349K |
| 代理商： | MAX6917EO50 |
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Bits D7 (32kHz VCC EN) and D6 (1Hz VCC EN) in the
FOUT configuration register enable the respective fre-
quency output when operating from VCC, if set to one,
or disable the respective frequency output if set to
zero. POR settings enable both output frequencies
when operating from VCC.
Applications Information
Crystal Selection
Connect a 32.768kHz watch crystal directly to the
MAX6917 through pins 9 and 10 (X1, X2) (Figure 20).
Use a crystal with a specified load capacitance (CL) of
6pF. Refer to Applications Note 616: Considerations for
Maxim Real-Time Clock Crystal Selection from the
Maxim website (www.maxim-ic.com) for more informa-
tion regarding crystal parameters and crystal selection,
as well as a list of crystal manufacturers.
When designing the PC board, keep the crystal as
close to the X1 and X2 pins of the MAX6917 as possi-
ble. Keep the trace lengths short and small to reduce
capacitive loading and prevent unwanted noise pickup.
Place a guard ring around the crystal and tie the ring to
ground to help isolate the crystal from unwanted noise
pickup. Keep all signals out from beneath the crystal
and the X1 and X2 pins to prevent noise coupling.
Finally, an additional local ground plane on an adjacent
PC board layer can be added under the crystal to
shield it from unwanted pickup from traces on other lay-
ers of the board. This plane should be isolated from the
regular PC board ground, tied to the GND pin of the
MAX6917, and needs to be no larger than the perime-
ter of the guard ring. Ensure that this ground plane
does not contribute to significant capacitance between
the signal line and ground on the connections that run
from X1 and X2 to the crystal. See Figure 21.
For frequency stability overtemperature, refer to the
Applications Note: Real-Time-Clock Selection and Opti-
mization from the Maxim website (www.maxim-ic.com.)
MAX6917
I2C-Compatible RTC with Microprocessor
Supervisor, Alarm, and NV RAM Controller
______________________________________________________________________________________
29
Chip Information
PROCESS: CMOS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6917EO50+ | 功能描述:實時時鐘 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 |
| MAX691AC/D | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX691ACPE | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX691ACPE+ | 功能描述:監(jiān)控電路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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