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参数资料
| 型号： | DS1744W-120 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| 封装： | EDIP MODULE-28 |
| 文件页数： | 16/22页 |
| 文件大小： | 920K |
| 代理商： | DS1744W-120 |
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
3 of 20
ORDERING INFORMATION
PART
VOLTAGE
(V)
TEMP RANGE
PIN-PACKAGE
TOP MARK**
DS1744-70
5.0
0°C to +70°C
28 EDIP
DS1744-70
DS1744-70+
5.0
0°C to +70°C
28 EDIP
DS1744+70
DS1744-70IND
5.0
-40°C to +85°C
28 EDIP
DS1744-70IND
DS1744-100+
5.0
0°C to +70°C
28 EDIP
DS1744+100
DS1744W-120
3.3
0°C to +70°C
28 EDIP
DS1744W-120
DS1744W-120+
3.3
0°C to +70°C
28 EDIP
DS1744W+120
DS1744W-120IND
3.3
-40°C to +85°C
28 EDIP
DS1744W-120IND
DS1744P-70
5.0
0°C to +70°C
34 PowerCap*
DS1744P-70
DS1744P-70+
5.0
0°C to +70°C
34 PowerCap*
DS1744P+70
DS1744P-70IND
5.0
-40°C to +85°C
34 PowerCap*
DS1744P-70IND
DS1744P-100+
5.0
0°C to +70°C
34 PowerCap*
DS1744P+100
DS1744WP-120
3.3
0°C to +70°C
34 PowerCap*
DS1744WP-120
DS1744WP-120+
3.3
0°C to +70°C
34 PowerCap*
DS1744WP+120
DS1744WP-120IND
3.3
-40°C to +85°C
34 PowerCap*
DS1744WP-120IND
+ Denotes a lead-free/RoHS-compliant device.
*DS9034-PCX, DS9034I-PCX, DS9034-PCX+ required (must be ordered separately).
** A “+” anywhere in the top mark denotes a lead-free device. An “IND” denotes an industrial temperature grade device.
DESCRIPTION
The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8
NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as
shown in Figure 1. The RTC information and control bits reside in the eight uppermost RAM locations.
The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour
BCD format. Corrections for the date of each month and leap year are made automatically. The RTC clock
registers are double-buffered to avoid access of incorrect data that can occur during clock update cycles.
The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by
access to time register data. The DS1744 also contains its own power-fail circuitry that deselects the
device when the VCC supply is in an out-of-tolerance condition. This feature prevents loss of data from
unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1744P | REAL TIME CLOCK, DMA34 |
| DS1744 | REAL TIME CLOCK, DMA28 |
| DS1746-70 | 0 TIMER(S), REAL TIME CLOCK, DIP32 |
| DS1746WP-120 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1746W-120 | 0 TIMER(S), REAL TIME CLOCK, DIP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1744W-120+ | 功能描述:实时时钟 Timekeeping NV RAM 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 |
| DS1744W-120IND | 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 |
| DS1744W-120IND+ | 功能描述:实时时钟 Timekeeping NV RAM 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 |
| DS1744WP-120 | 功能描述:实时时钟 Timekeeping NV RAM 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 |
| DS1744WP-120+ | 功能描述:实时时钟 Timekeeping NV RAM 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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