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DS1308 PDF预览

DS1308

更新时间: 2024-01-30 00:11:33
品牌 Logo 应用领域
美信 - MAXIM 计时器或实时时钟微控制器和处理器外围集成电路
页数 文件大小 规格书
16页 1244K
描述
Low-Current I2C RTC with 56-Byte NV RAM

DS1308 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:BGA-36Reach Compliance Code:unknown
风险等级:5.78Is Samacsys:N
最大时钟频率:0.032 MHz信息访问方法:I2C
中断能力:NJESD-30 代码:R-PBGA-B36
JESD-609代码:e0端子数量:36
计时器数量:1最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:BGA封装等效代码:BGA36,9X8,50
封装形状:RECTANGULAR封装形式:GRID ARRAY
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not Qualified子类别:Timer or RTC
最大供电电压:5.5 V最小供电电压:4.5 V
标称供电电压:5 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:BALL
端子节距:1.27 mm端子位置:BOTTOM
最短时间:SECONDS处于峰值回流温度下的最长时间:NOT SPECIFIED
易失性:YESuPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCK
Base Number Matches:1

DS1308 数据手册

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DS1308  
2
Low-Current I C RTC with 56-Byte NV RAM  
Pin Configuration  
TOP VIEW  
+
X1  
X2  
1
2
3
4
8
7
6
5
V
CC  
SQW/CLKIN  
SCL  
DS1308  
V
BAT  
GND  
SDA  
µSOP  
Pin Description  
PIN  
NAME  
FUNCTION  
32.768kHz Crystal Connections. The internal oscillator circuitry is designed for use with a crystal  
1
X1  
having a specified load capacitance (C ) of 6pF.  
L
Note: For more information about crystal selection and crystal layout considerations, refer to  
Application Note 58: Crystal Considerations with Maxim Real-Time Clocks (RTCs).  
2
X2  
Battery Supply Input for Lithium Cell or Other Energy Source. Battery voltage must be held between  
the minimum and maximum limits for proper operation. Diodes placed in series between the backup  
3
V
BAT  
source and the V  
pin can prevent proper operation. If a backup supply is not required, V  
BAT  
BAT  
must be grounded. UL recognized to ensure against reverse charging when used with a lithium cell.  
4
5
GND  
SDA  
Ground  
2
Serial Data Input/Output for the I C serial interface. It is an open-drain output and requires an  
external pullup resistor. The pullup voltage can be up to 5.5V, regardless of the voltage on V  
.
CC  
2
Serial Clock Input for the I C serial interface. Used to synchronize data movement on the serial  
6
SCL  
interface. The pullup voltage can be up to 5.5V, regardless of the voltage on V  
.
CC  
Square-Wave Output/Clock Input. This I/O pin is used to output one of four square-wave  
frequencies (1Hz, 4kHz, 8kHz, 32kHz) or accept an external clock input to drive the RTC counter.  
SQW/CLKIN In the output mode (ECLK = 0), it is open drain and requires an external pullup resistor. The  
square-wave operates on V , or on V with BBCLK = 1. The pullup voltage can be up to 5.5V,  
7
8
CC  
BAT  
regardless of the voltage on V . If not used, this pin may be left unconnected.  
CC  
V
Primary Power Supply. Decouple the power supply with a 0.1FF capacitor to ground.  
CC  
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7

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