- 您现在的位置：买卖IC网 > PDF目录1994 > DS14285SN+T&R (Maxim Integrated Products)IC RTC W/NV RAM CNTRL 24-SOIC PDF资料下载
参数资料
| 型号： | DS14285SN+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/26页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/NV RAM CNTRL 24-SOIC |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，夏令时，闰年，NVSRAM，方波输出 |
| 存储容量： | 114B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
DS14285/DS14287
8 of 26
RTC ADDRESS MAP
The address map of the DS14285/DS14287 is shown in Figure 2. The address map consists of 114 bytes
of user RAM, 10 bytes of RAM that contain the RTC time, calendar, and alarm data, and 4 bytes which
are used for control and status. All 128 bytes can be directly written or read except for the following:
1. Registers C and D are read-only.
2. Bit 7 of Register A is read-only.
3. The high order bit of the seconds byte is read-only.
The contents of four registers (A,B,C, and D) are described in the “Registers” section.
Figure 2. DS14285/DS14287 Address Map
TIME, CALENDAR AND ALARM LOCATIONS
The time and calendar information is obtained by reading the appropriate memory bytes. The time,
calendar, and alarm are set or initialized by writing the appropriate RAM bytes. The contents of the 10
time, calendar, and alarm bytes can be either Binary or Binary-Coded Decimal (BCD) format. Before
writing the internal time, calendar, and alarm registers, the SET bit in Register B should be written to a
logic 1 to prevent updates from occurring while access is being attempted. In addition to writing the 10
time, calendar, and alarm registers in a selected format (binary or BCD), the data mode bit (DM) of
Register B must be set to the appropriate logic level. All 10 time, calendar, and alarm bytes must use the
same data mode. The set bit in Register B should be cleared after the data mode bit has been written to
allow the real-time clock to update the time and calendar bytes. Once initialized, the real-time clock
makes all updates in the selected mode. The data mode cannot be changed without reinitializing the 10
data bytes. Table 1 shows the binary and BCD formats of the ten time, calendar, and alarm locations. The
相关PDF资料 |
PDF描述 |
|---|---|
| DS1486P-120+ | IC TIMEKEEPER RAM 1MB 34-PCM |
| DS1500WE | IC RTC Y2KC W/NV CTRL 32-TSOP |
| DS1501YSN+T&R | IC RTC WDOG Y2K 5V IND 28-SOIC |
| DS1553P-70+ | IC RTC RAM Y2K 5V 70NS 34-PCM |
| DS1554W-120IND | IC RTC RAM Y2K 3.3V 120NS 32EDIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS14287 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS14287+ | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1-48-0001 | 功能描述:固定电感器 DS Storage choke 3.15A RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm |
| DS1-48-0002 | 功能描述:固定电感器 DS Storage choke 4A RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm |
| DS1-48-0003 | 制造商:Schurter Electronic Components 功能描述: |
发布紧急采购，3分钟左右您将得到回复。