参数资料
| 型号： | PT7C43390WEX |
| 厂商： | Pericom |
| 文件页数： | 5/23页 |
| 文件大小： | 0K |
| 描述： | IC REAL TIME CLOCK 8SOIC |
| 标准包装： | 1 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.3 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 标准包装 |
| 其它名称： | PT7C43390WEXDKR |
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PT0280(08/09)
Ver: 3
13
Data Sheet
PT7C43390
2-Wire Real-time Clock Module
Caution Since the minute carry processing signal is retained for 123 s, if communication disable or enable is executed
during this period, low is output from the INT1 (or INT2) pin again.
4.
Per-minute steady interrupt output 1
When the first minute carry is performed after the INT1 (or INT2) pin output mode is set as per-minute steady interrupt 1 using
status register_2, a clock whose cycle is 1 minute (50% duty) is output from the INT1 (or INT2) pin.
Caution When communication disable or enable is execued while the INT1 (or INT2) pin is low, low is output from the
INT1 (or INT2) pin again.
5.
Per-minute steady interrupt output 2(INT1 output mode only)
When the first minute carry is performed after the INT1 pin output mode is set as per-minute steady interrupt 2 using status
register_2, low is output from the INT1 pin for a period of 7.9 ms in synchronization with the minute carry processing inside the
IC. However, when real-time data is read, the minute carry processing is delayed by a maximum of 0.5 s and accordingly low
output from the INT1 pin is also delayed by a maximum of 0.5 s. When the second data is rewritten by a real-time data write
command, counting starts from the rewritten second data and as a result, the output interval during that period may become either
longer or shorter.
1)
During normal operation
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