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參數(shù)資料
| 型號： | PT7C4563UEX |
| 廠商： | Pericom |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC REAL TIME CLOCK 8MSOP |
| 標準包裝： | 1 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，方波輸出 |
| 時間格式： | HH:MM:SS（24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 1.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-MSOP |
| 包裝： | 標準包裝 |
| 其它名稱： | PT7C4563UEXDKR |
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PT0333(09/09)
Ver: 0
16
Data Sheet
PT7C4563
Real-time Clock Module (I2C Bus)
Recommended Layout for Crystal
Built-in Capacitors Specifications and Recommended External Capacitors
Parameter
Symbol
Typ
Unit
X1 to GND
CG
12
pF
Build-in capacitors
X2 to GND
CD
12
pF
X1 to GND
C1
10
pF
Recommended External capacitors for
crystal CL=12.5pF
X2 to GND
C2
10
pF
X1 to GND
C1
0
pF
Recommended External capacitors for
crystal CL=6pF
X2 to GND
C2
0
pF
Note: The frequency of crystal can be optimized by external capacitor C
1 and C2, for frequency=32.768Hz, C1 and C2 should meet
the equation as below:
Cpar + [(C1+CG)*(C2+CD)]/ [(C1+CG)+(C2+CD)] =CL
Cpar is all parasitical capacitor between X1 and X2.
CL is crystal’s load capacitance.
Crystal Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Nominal Frequency
fO
-
32.768
-
kHz
Series Resistance
ESR
-
70
k
Load Capacitance
CL
-
6/12.5
-
pF
Note: The crystal, traces and crystal input pins
should be isolated from RF generating signals.
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