参数资料
| 型号： | DS1390U-33+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/26页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/CHARGER 10-USOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出，涓流充电器 |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 电源电压： | 2.97 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
DS1390–DS1394
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
15
Maxim Integrated
Hundredths-of-Seconds
Generator
The hundredths-of-seconds generator circuit shown in
the functional diagram is a state machine that divides
the incoming frequency (4096Hz) by 41 for 24 cycles
and 40 for one cycle. This produces a 100Hz output
that is slightly off during the short term, and is exactly
correct every 250ms. The divide ratio is given by:
Ratio = [41 x 24 + 40 x 1] / 25 = 40.96
Thus, the long-term average frequency output is
exactly the desired 100Hz.
Clock and Calendar
The time and calendar information is obtained by read-
ing the appropriate register bytes. See Table 3 for the
RTC registers. The time and calendar are set or initial-
ized by writing the appropriate register bytes. The con-
tents of the time and calendar registers are in the bina-
ry-coded decimal (BCD) format. The day-of-week
register increments at midnight. Values that correspond
to the day-of-week are user-defined but must be
sequential (i.e., if 1 equals Sunday, then 2 equals
Monday, and so on). Illogical time and date entries
result in undefined operation. The DS1390–DS1393 can
run in either 12-hour or 24-hour mode. Bit 6 of the hours
register is defined as the 12- or 24-hour mode-select
bit. When high, the 12-hour mode is selected. In the 12-
hour mode, bit 5 is the AM/PM bit with logic high being
PM. In the 24-hour mode, bit 5 is the second 10-hour
bit (20 to 23 hours). Changing the 12/24-hour mode-
select bit requires that the hours data be re-entered,
including the alarm register (if used). The century bit
(bit 7 of the month register) is toggled when the years
register overflows from 99 to 00.
WRITE
ADDRESS
READ
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FUNCTION
RANGE
AM/PM
8Bh
0Bh
AM3
12/
24
10 Hour
10
Hour
Alarm Hours
1–12 +
AM/PM
00–23 BCD
Day
Alarm Day
1–7 BCD
8Ch
0Ch
AM4
DY/
DT
10 Date
Date
Alarm Date
01–31 BCD
0
BBSQI
RS2
RS1
INTCN
0
AIE
DS1390/93/94
0
X
0
X
DS1391
8Dh
0Dh
EOSC
0
BBSQI
RS2
RS1
ESQW
0
AIE
Control
DS1392
8Eh
0Eh
OSF
0
AF
Status
—
8Fh
0Fh
TCS3
TCS2
TCS1
TCS0
DS1
DS0
ROUT1
ROUT0
Trickle
Charger
—
Table 3. Address Map (continued)
Note: Unless otherwise specified, the state of the registers is not defined when power (VCC and VBACKUP) is first applied.
X = General-purpose read/write bit.
0 = Always reads as zero.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1390U-33/V+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390U-33/V+T | 制造商:Maxim Integrated Products 功能描述:SERIAL RTC 3.3V USOP PBFREE T&R AUTOMOTIVE - Tape and Reel |
| DS1390U-33+ | 功能描述:实时时钟 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1390U-33+T&R | 制造商:Maxim Integrated Products 功能描述:SERIAL RTC 33V USOP 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/CHARGER 10-USOP 制造商:Maxim Integrated Products 功能描述:IC RTC W/CHARGER 10USOP |
| DS1390U-33+T&R | 功能描述:实时时钟 Low-V SPI/3-Wire With Trickle Charger 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 |
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