【产品】带56字节RAM的I²C串行实时时钟芯片DS1307，工业温度范围为-40℃至+85℃
DS1307是一款低功耗、带 56 个字节用户非易失性 SRAM（NV SRAM）、全BCD码的时钟/日历电路（串行实时时钟芯片）。地址和数据通过串行 I2C 总线传递。时钟/日历提供秒、分、小时、周、日、月和年信息。对小于31 天的月，月末的日期自动进行调整，还具有闰年校正的功能。时钟可以工作在24 小时格式或带 AM/PM 标志的12小时格式。 DS1307有一个内置的电压判断电路，具有检测电源掉电功能，在电源掉电时，可自动切换到由备用电源（电池）供电。
特征
●基于32.768 kHz 的石英晶体，可对秒，分，时， 日，月，周以及带闰年补偿的年进行计数
●带备用电池的 56 字节非易失性 RAM
●I²C 串行总线接口
●可编程方波输出
●自动掉电检测及电源切换电路
●电池供电下，振荡器工作时的消耗小于 500nA
●可选的工业温度范围：-40℃至+85℃
●封装形式：DIP8 和 SOP8
应用
●付费率电度表、IC卡水表、IC 卡煤气表
●移动电话
●便携仪器
●传真机
●电池电源产品
●电视机
订购信息
方框图和管脚功能
方框图
管脚图
管脚说明
绝对最大额定值
推荐直流工作条件
直流电气特性
交流电气特性
注：1、VCC，SDA 和 SCL 都为 5.0V。
2、VCC=0V，VBAT=3V。
3、该周期之后，将产生第一个时钟脉冲。
4、器件内部必须提供一个至少 300ns 的 SDA 信号保持时间（参考 SCL 信号的 VIHMIN），以跳过 SCL 下降边沿的未定义区域。
5、最大 tHDDAT 只适用于器件 SCL 信号的 LOW 周期（tLOW）没有变宽的情况。
6、CB — 一个总线上的电容总和（pF）。
7、ICCA— SCL 为最大频率，即 100kHz。
8、VBAT=3.0V 时的 VPF。
时 序
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本文由发条橙子啦转载自华冠半导体，原文标题为:DS1307带56字节RAM的I²C串行实时时钟芯片，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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目录- 公司简介 MOS管/比较器/存储器电路/达林顿阵列 电源管理电路 低压差稳压器 线性稳压/通用接口电路 驱动/音频电路 运算放大器/时基与时钟/逻辑电路&其他电路 微处理器 运放 接口 半导体器件概览
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【产品】华冠半导体推出的达林顿阵列功率驱动集成电路ULN2003A，输出电压高达50V，灌电流可达500mA
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