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參數(shù)資料
| 型號(hào)： | DS14285 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | XO, clock |
| 英文描述： | Real Time Clock with NV RAM Control(帶非易失性RAM控制的實(shí)時(shí)時(shí)鐘) |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封裝： | DIP-24 |
| 文件頁數(shù)： | 23/23頁 |
| 文件大小： | 170K |
| 代理商： | DS14285 |
DS14285/DS14287
022798 23/23
NOTES:
1. All voltages are referenced to ground.
2. All outputs are open.
3. The MOT pin has an internal pulldown of 20 K .
4. The CEI pin has an internal pull–up of 50K
.
5. Applies to the AD0–AD7 pins, the IRQ pin,and the SQW pin when each is in the high impedance state.
6. The IRQ pin is open drain. The interrupt and the internal clock continue to run regardless of the level of VCC.
However, it is important to insure that the pull–up resistor used with the interrupt pin is never pulled up to a value
which is greater than VCC + 0.3V. As VCC falls below approximately 3.0 volts, a power switching circuit turns
the lithium energy source on to maintain the clock and timer data functionality.
7. I
CCO
=100 mA, V
CC
> V
BAT
.
8. I
CCO
=100
μ
A, V
CC
< V
BAT
.
9. Measured with a load as shown in Figure 5.
10.Expected data retention is based on using an external SRAM with a data retention current of less than 1
μ
A at
25
°
C.
11. Z
CE
is an average input–to–output impedance as the input is swept from ground to V
CCI
and less than 4 mA is
forced through Z
CE
.
12.Real–Time Clock Modules such as the DS14287 can be successfully processed through conventional wave–sol-
dering techniques as long as temperature exposure to the lithium energy source contained within does not exceed
+85
°
C. Post solder cleaning with water washing techniques is acceptable, provided that ultrasonic vibration is
not used.
OUTPUT LOAD
Figure 5
+5 VOLTS
50 pF
D.U.T.
1.1 K
680
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| DS1543 | 64K NV Timekeeping RAM(64K非易失性計(jì)時(shí) RAM) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS14285_05 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Real-Time Clock with NV RAM |
| DS14285+ | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS14285-DS14287 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Real Time Clock with NV RAM Control |
| DS14285N | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS14285N+ | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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