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參數(shù)資料
| 型號(hào)： | DS1746P-70 |
| 英文描述： | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| 中文描述： | 千年蟲的，非易失時(shí)鐘存儲(chǔ)器 |
| 文件頁數(shù)： | 2/18頁 |
| 文件大小： | 224K |
| 代理商： | DS1746P-70 |
DS1746/DS1746P
2 of 18
PIN DESCRIPTION
A0–A16
CE
OE
WE
V
CC
GND
DQ0–DQ7
NC
RST
X1, X2
V
BAT
– Address Input
– Chip Enable
– Output Enable
– Write Enable
– Power Supply Input
– Ground
– Data Input/Output
– No Connection
– Power–on Reset Output (Power–
Cap Module board only)
– Crystal Connection
– Battery Connection
ORDERING INFORMATION
DS1746P
(5V)
blank 32-pin DIP Module
P
34-pin PowerCap Module board*
DS1746WP
(3.3V)
blank 32-pin DIP Module
P 34-pin PowerCap Module board*
*DS9034PCX (PowerCap) Required:
(must be ordered separately)
DESCRIPTION
The DS1746 is a full function, year 2000 compliant (Y2KC), real-time clock/calendar (RTC) and 128k x
8 non-volatile static RAM. User access to all registers within the DS1746 is accomplished with a
bytewide interface as shown in Figure 1. The Real Time Clock (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 DS1746 also contains its
own power-fail circuitry which 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 |
|---|---|
| DS17485-DS17487 | 3V/5V Real-Time Clock |
| DS17485 | 3V/5V Real-Time Clock |
| DS17485E-3 | 3V/5V Real-Time Clock |
| DS17485E-5 | 3V/5V Real-Time Clock |
| DS17485EN-3 | 3V/5V Real-Time Clock |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1746P-70+ | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1746P-70IND | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1746P-70IND+ | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1746W | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Y2KC Nonvolatile Timekeeping RAM |
| DS1746W-120 | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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