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參數(shù)資料
| 型號： | DS1642-70 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | REAL TIME CLOCK, PDMA24 |
| 封裝： | EDIP MODULE-24 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 756K |
| 代理商： | DS1642-70 |
DS1642
2 of 12
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
A7
2
A6
3
A5
4
A4
5
A3
6
A2
7
A1
8
A0
19
A10
22
A9
23
A8
Address Input
9
DQ0
10
DQ1
11
DQ2
13
DQ3
14
DQ4
15
DQ5
16
DQ6
17
DQ7
Data Input/Output
12
GND
Ground
18
CE
Active-Low Chip-Enable Input
20
OE
Active-Low Output-Enable Input
21
WE
Active-Low Write-Enable Input
24
VCC
Power-Supply Input
DESCRIPTION
The DS1642 is a 2k x 8 nonvolatile static RAM and a full-function real-time clock (RTC), both of which
are accessible in a bytewide format. The nonvolatile time keeping RAM is pin and function equivalent to
any JEDEC-standard 2k x 8 SRAM. The device can also be easily substituted in ROM, EPROM, and
EEPROM sockets, providing read/write nonvolatility and the addition of the real-time clock function. The
real-time clock information resides in the eight uppermost RAM locations. The RTC registers contain
year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for the day
of the 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
DS1642 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 |
|---|---|
| DS1643-100 | 1 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1643P-100 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1643P-70 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1643-70 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1644-120 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1642-70+ | 功能描述:實時時鐘 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 |
| DS1642-85 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK PARALLEL 2KBYTE 24PIN EDIP - Bulk |
| DS1642-85+ | 功能描述:實時時鐘 NV Timekeeping 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 |
| DS-1642ZJ | 制造商:Hikvision USA 功能描述:6" Outdoor Speed Dome Bracket, White, Ceiling Mount Bracket |
| DS1643 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Nonvolatile Timekeeping RAMs |
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