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參數(shù)資料
| 型號： | DS1747 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | REAL TIME CLOCK, DMA32 |
| 封裝： | PLASTIC, MODULE, DIP-32 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 249K |
| 代理商： | DS1747 |
DS1747/DS1747P
2 of 18
PIN DESCRIPTION
A0–A18
– Address Input
CE
– Chip Enable
OE
– Output Enable
WE
– Write Enable
VCC
– Power Supply Input
GND
– Ground
DQ0–DQ7
– Data Input/Output
NC
– No Connection
RST
– Power–on Reset Output(Power–
Cap Module board only)
X1, X2
– Crystal Connection
VBAT
– Battery Connection
ORDERING INFORMATION
DS1747P
(5V)
blank 32-pin DIP Module
P
34-pin PowerCap Module board*
DS1747WP
(3.3V)
blank 32-pin DIP Module
P
34-pin PowerCap Module board*
*DS9034PCX (PowerCap) Required:
(must be ordered separately)
DESCRIPTION
The DS1747 is a full function, year 2000 compliant (Y2KC), real–time clock/calendar (RTC) and 512k
x 8 non–volatile static RAM. User access to all registers within the DS1747 is accomplished with a
bytewide interface as shown in Figure 1. The Real Time Clock (RTC) information and control bits
reside in the eight upper most 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 DS1747 also
contains its own power–fail circuitry which 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1747P | REAL TIME CLOCK, DMA34 |
| DS17485E-5 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS17485-3 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS17485-5 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS17485S-3 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1747_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1747_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1747-70 | 功能描述:實時時鐘 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 |
| DS1747-70+ | 功能描述:實時時鐘 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 |
| DS1747-70IND | 功能描述:實時時鐘 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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