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參數(shù)資料
| 型號： | DS1744P |
| 英文描述： | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| 文件頁數(shù)： | 2/18頁 |
| 文件大小： | 348K |
| 代理商： | DS1744P |
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
2 of 18
PIN DESCRIPTION
A0–A14
CE
OE
WE
V
CC
GND
DQ0–DQ7
N.C.
RST
X1, X2
V
BAT
ORDERING INFORMATION
- Address Input
- Chip Enable
- Output Enable
- Write Enable
- Power-Supply Input
- Ground
- Data Input/Output
- No Connection
- Power-On Reset Output (PowerCap module board only)
- Crystal Connection
- Battery Connection
PART
TEMP RANGE
PIN-PACKAGE
VOLTAGE
(V)
5
5
5
5
3.3
3.3
3.3
3.3
TOP MARK
DS1744-70
DS1744-70IND
DS1744P-70
DS1744P-70IND
DS1744W-120
DS1744W-120IND
DS1744WP-120
DS1744WP-120IND
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
28 PDIP Module
28 PDIP Module
34 PowerCap*
34 PowerCap*
28 DIP Module
28 DIP Module
34 PowerCap*
34 PowerCap*
DS1744-70
DS1744-70IND
DS1744P-70
DS1744P-70IND
DS1744W-120
DS1744W-120IND
DS1744WP-120
DS1744WP-120IND
*
DS9034PCX (PowerCap) required. (Must be ordered separately.)
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 V
CC
supply is in an out-of-tolerance condition. This feature prevents loss of data from
unpredictable system operation brought on by low V
CC
as errant access and update cycles are avoided.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1744P-70 | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744P-70IND | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744W-120 | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744W-120IND | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744WP-120 | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1744P/YP/WP | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:PowerCap with Crystal |
| DS1744P-70 | 功能描述:實(shí)時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1744P-70+ | 功能描述:實(shí)時時鐘 Timekeeping NV RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1744P-70IND | 功能描述:實(shí)時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1744P-70IND+ | 功能描述:實(shí)時時鐘 Timekeeping NV RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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