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參數(shù)資料
| 型號： | DS14285-DS14287 |
| 英文描述： | Real Time Clock with NV RAM Control |
| 中文描述： | 實時時鐘的非易失RAM控制 |
| 文件頁數(shù)： | 1/25頁 |
| 文件大?。?/td> | 303K |
| 代理商： | DS14285-DS14287 |
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080400
FEATURES
Direct replacement for IBM AT computer
clock/calendar
Functionally compatible with the
DS1285/DS1287
Available as chip (DS14285, DS14285S, or
DS14285Q) or stand-alone module with
embedded lithium battery and crystal
(DS14287)
Automatic backup supply and write
protection to make external SRAM
nonvolatile
Counts seconds, minutes, hours, days, day of
the week, date, month, and year with leap
year compensation valid up to 2100
Binary or BCD representation of time,
calendar, and alarm
12- or 24-hour clock with AM and PM in
12-hour mode
Daylight Savings Time option
Multiplex bus for pin efficiency
Interfaced with software as 128 RAM
locations
–
14 bytes of clock and control registers
–
114 bytes of general purpose RAM
Programmable square wave output signal
Bus-compatible interrupt signals (
IRQ
)
Three interrupts are separately software-
maskable and testable
–
Time-of-day alarm once/second to
once/day
–
Periodic rates from 122
μ
s to 500 ms
–
End of clock update cycle
Optional industrial temperature version
available DS14285 DIP, SOIC, and PLCC
PIN ASSIGNMENT
DS14285/DS14287
Real Time Clock with NV RAM Control
www.dalsemi.com
DS14285 24-Pin DIP
DS14285S 24-Pin SOIC
23
22
21
20
19
18
17
16
15
14
13
X2
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
V
CC
SQW
CEO
CEI
V
BAT
IRQ
RESET
DS
GND
R/W
AS
CS
1
2
3
4
5
6
7
8
9
10
11
12
24
X1
AD0
DS14285Q 28-Pin PLCC
AD0
AD1
AD2
AD3
AD4
AD5
NC
CEI
V
IRQ
RESET
DS
GND
R/W
X
X
M
V
V
S
C
A
N
A
G
C
A
N
25
24
23
22
21
20
19
5
6
7
8
9
10
11
4 3 2 1 28 27 26
12 13 14 15 16 17 18
23
22
21
20
19
18
17
16
15
14
13
NC
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
V
CC
SQW
CEO
CEI
NC
IRQ
RESET
DS
NC
R/W
AS
CS
1
2
3
4
5
6
7
8
9
10
11
12
24
NC
V
CCO
DS14287 24-Pin
Encapsulated Package
V
CCO
相關PDF資料 |
PDF描述 |
|---|---|
| DS14285 | Real Time Clock with NV RAM Control |
| DS14285N | Real Time Clock with NV RAM Control |
| DS14285Q | Real Time Clock with NV RAM Control |
| DS14285QN | Real Time Clock with NV RAM Control |
| DS14285S | Real Time Clock with NV RAM Control |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS14285N | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS14285N+ | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS14285Q | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS14285Q+ | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS14285QN | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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