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參數(shù)資料
| 型號： | DS14287 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | XO, clock |
| 英文描述： | Real Time Clock with NV RAM Control(帶非易失性RAM控制的實時時鐘) |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封裝： | MODULE, DIP-24 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大?。?/td> | 170K |
| 代理商： | DS14287 |
DS14285/DS14287
Real Time Clock with NV RAM Control
DS14285/DS14287
022798 1/23
FEATURES
Direct replacement for IBM AT computer clock/calen-
dar
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 com-
pensation 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
ORDERING INFORMATION
DS14285
DS14285S
DS14285Q
DS14287
RTC Chip; 24–pin DIP
RTC Chip; 24–pin SOIC
RTC Chip; 28–pin PLCC
RTC Module; 24–pin DIP
PIN ASSIGNMENT
AD0
AD1
AD2
AD3
AD4
AD5
NC
DS14285 24–PIN DIP
DS14285S 24–PIN SOIC
V
CC
SQW
CEO
CEI
V
BAT
IRQ
RESET
DS
GND
R/W
AS
CS
V
CCO
X1
X2
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
4
3 2
1
CEI
V
BAT
IRQ
RESET
DS
GND
R/W
28 27 26
25
24
23
22
21
20
19
DS14285Q 28–PIN PLCC
X
M
V
V
S
C
X
A
A
G
C
A
N
12 13 14 1516 17 18
5
6
7
8
9
10
11
N
DS14287 24–PIN ENCAPSULATED PACKAGE
V
CC
SQW
CEO
CEI
NC
IRQ
RESET
DS
NC
R/W
AS
CS
V
CCO
NC
NC
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
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| DS1543 | 64K NV Timekeeping RAM(64K非易失性計時 RAM) |
| DS1647 | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| DS1647P | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS14287+ | 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 |
| DS1-48-0001 | 功能描述:固定電感器 DS Storage choke 3.15A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| DS1-48-0002 | 功能描述:固定電感器 DS Storage choke 4A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| DS1-48-0003 | 制造商:Schurter Electronic Components 功能描述: |
| DS1-48-0004 | 制造商:Schurter Electronic Components 功能描述: |
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