参数资料
| 型号： | PT7C4302WEX |
| 厂商： | Pericom |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC RTC NVSRAM 8SOIC |
| 标准包装： | 1 |
| 类型： | 时钟/日历 |
| 特点： | 闰年，NVSRAM，方波输出，涓流充电器 |
| 存储容量： | 31B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 3 线串口 |
| 电源电压： | 1.2 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.5 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： | PT7C4302WEXDKR |
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12-07-0001
PT0225-4
07/04/12
6
PT7C4302
Real-time Clock Module (3-wire Interface)
Function Description
Overview of Functions
1.
Clock function
CPU can read or write data including the year (last two digits), month, date, day, hour, minute, and second. Any (two-digit) year
that is a multiple of 4 is treated as a leap year and calculated automatically as such until the year 2099.
2.
Interface with CPU
Simple 3-wire interface.
3.
Oscillator enable/disable
Oscillator can be enabled or disable by /EOSC bit. But time count chain does not shut down when the bit is logic 1.
4.
Charger function
The function is controlled by trickle charge register. Customer can select the charge current by select the number of diode and
resistor value through the register.
For example:
Assume that a system power supply of 5V is applied to VCC2 and a super cap is connected to VCC1. Also assume that the trickle
charger has been enabled with one diode and resistor R1 between VCC2 and VCC1. The maximum current IMAX would,
therefore, be calculated as follows:
IMAX = (5.0V - diode drop)/R1 _ (5.0V - 0.7V) / 2k _ 2.2mA
As the super cap charges, the voltage drop between VCC1 and VCC2 will decrease and, therefore, the charge current will
decrease.
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| PT7C4307 | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:Real-time Clock Module (I2C Bus) |
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| PT7C4307WEX | 功能描述:IC RTC ALARM NVSRAM 8SOIC RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 标准包装:2,500 系列:- 类型:时钟/日历 特点:警报器，闰年，监控器，监视计时器 存储容量:- 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:2.7 V ~ 5.5 V 电压 - 电源，电池:1.8 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| PT7C4311WEX | 功能描述:IC RTC LEAP YEAR Y2K 8SOIC RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 标准包装:2,500 系列:- 类型:时钟/日历 特点:警报器，闰年，监控器，监视计时器 存储容量:- 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:2.7 V ~ 5.5 V 电压 - 电源，电池:1.8 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
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