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DS12CR887-33+ 参数 Datasheet PDF下载

DS12CR887-33+图片预览
型号: DS12CR887-33+
PDF下载: 下载PDF文件 查看货源
内容描述: RTC,带有恒压涓流充电器 [RTCs with Constant-Voltage Trickle Charger]
分类和应用: 计时器或实时时钟微控制器和处理器外围集成电路光电二极管
文件页数/大小: 23 页 / 333 K
品牌: MAXIM [ MAXIM INTEGRATED PRODUCTS ]
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RTCs with Constant-Voltage Trickle Charger  
5C/DS12R87  
POWER-UP/POWER-DOWN CHARACTERISTICS  
(T = -40°C to +85°C) (Note 1)  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Recovery at Power-Up  
t
20  
200  
ms  
RPU  
V
V
Fall Time; V  
PF(MIN)  
to  
to  
CC  
PF(MAX)  
t
300  
0
µs  
µs  
F
V
V
Rise Time; V  
PF(MIN)  
PF(MAX)  
CC  
t
R
DATA RETENTION (DS12CR887)  
PARAMETER  
SYMBOL  
CONDITIONS  
CONDITIONS  
MIN  
TYP  
TYP  
MAX  
UNITS  
Expected Data Retention  
t
T
A
= +25°C  
5
Years  
DR  
CAPACITANCE  
(T = +25°C)  
A
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Capacitance on All Input Pins  
Except X1 and X2  
C
(Note 9)  
(Note 9)  
10  
pF  
IN  
IO  
Capacitance on IRQ, SQW, and  
DQ Pins  
C
10  
pF  
AC TEST CONDITIONS  
PARAMETER  
TEST CONDITIONS  
Input Pulse Levels (-5)  
Input Pulse Levels (-33)  
0 to 3.0V  
0 to 2.7V  
Output Load Including Scope and Jig (-5)  
Output Load Including Scope and Jig (-33)  
50pF + 1TTL Gate  
25pF + 1TTL Gate  
Input and Output Timing Measurement Reference Levels  
Input-Pulse Rise and Fall Times  
Input/Output: V maximum and V minimum  
IL IH  
5ns  
WARNING: Negative undershoots below -0.3V while the part is in battery-backed mode may cause loss of data.  
Note 1: Limits at -40°C are guaranteed by design and not production tested.  
Note 2: All voltages are referenced to ground.  
Note 3: All outputs are open.  
Note 4: Specified with CS = DS = R/W = RESET = V ; MOT, AS, AD0–AD7 = 0; V  
open.  
CC  
BACKUP  
Note 5: Applies to the AD0 to AD7 pins, the IRQ pin, and the SQW pin when each is in a high-impedance state.  
Note 6: The MOT pin has an internal 20kΩ pulldown.  
Note 7: Measured with a 32.768kHz crystal attached to X1 and X2.  
Note 8: Measured with a 50pF capacitance load.  
Note 9: Guaranteed by design. Not production tested.  
_____________________________________________________________________  
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