參數(shù)資料
型號(hào)： DS14287
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： MODULE, DIP-24
文件頁(yè)數(shù)： 23/23頁(yè)
文件大?。?/td> 170K
代理商： DS14287
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
相關(guān)PDF資料
PDF描述
DS1486 RAMified Watchdog Timekeeper(RAM化的看門狗計(jì)時(shí)器)
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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
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DS1-48-0001 功能描述:固定電感器 DS Storage choke 3.15A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
DS1-48-0002 功能描述:固定電感器 DS Storage choke 4A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
DS1-48-0003 制造商:Schurter Electronic Components 功能描述:
DS1-48-0004 制造商:Schurter Electronic Components 功能描述:
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