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參數資料
| 型號： | DS1284 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | XO, clock |
| 英文描述： | Watchdog Timekeeper Chip(看門狗計時器芯片) |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| 封裝： | 0.600 INCH, DIP-28 |
| 文件頁數： | 1/3頁 |
| 文件大?。?/td> | 37K |
| 代理商： | DS1284 |
DS1284
Watchdog Timekeeper Chip
DS1284
022798 1/3
FEATURES
Keeps track of hundredths of seconds, seconds, min-
utes, hours, days, date of the month, months, and
years; valid leap year compensation up to 2100
Watchdog timer restarts an out–of–control processor
Alarm function schedules real-time related activities
Programmable interrupts and square wave outputs
maintain 28–pin JEDEC footprint
All registers are individually addressable via the ad-
dress and data bus
Accuracy is better than
±
2 minute/month at 25
°
C
50 bytes of user NV RAM
Optional 28–pin PLCC surface mount package
Low–power CMOS circuitry is maintained on less
than 0.5
μ
A when power is supplied from battery input
Optional industrial temperature range available on
28–pin PLCC (–40
°
C to +85
°
C)
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
24
23
22
21
20
19
18
17
16
15
14
25
26
27
28
NC
A5
A4
A3
A2
A1
A0
DQ0
GND
VCC
WE
INTB(INTB)
SQW
OE
VBAT
RCLR
X1
X2
4
3
2
28
27 2625
24
23
22
21
20
19
5
6
7
8
9
10
11
12 13 14 15 16 17 18
A5
A4
A3
A2
A1
A0
DQ0
DQ7
GND
CE
SQW
OE
VBAT
RCLR
1
GND
CE
DQ7
DQ6
DQ5
DQ4
DQ3
INTA
N
X
X
I
V
W
I
D
D
G
D
D
D
D
DS1284
28–PIN DIP (600 MIL)
DS1284Q
28–PIN PLCC
DQ2
DQ1
PIN DESCRIPTION
INTA
INTB(INTB)
A0–A5
DQ0–DQ7
CE
OE
WE
V
CC
GND
NC
SQW
X1,X2
– Interrupt Output A (open drain)
– Interrupt Output B (open drain)
– Address Inputs
– Data Input/Output
– Chip Enable
– Output Enable
– Write Enable
– +5 Volts
– Ground
– No Connection
– Square Wave Output
– 32.768 KHz Crystal
Connections
– +3 Volt Battery Input
– RAM Clear
V
BAT
RCLR
DESCRIPTION
The DS1284 Watchdog Timekeeper Chip is a self–con-
tained real–time clock, alarm, watchdog timer, and inter-
val timer in a 28–pin JEDEC DIP package or a 28–pin
PLCC surface mount package. An external crystal and
battery are the only components required to maintain
time–of–day and memory status in the absence of
power. For a complete description of operating condi-
tions, electrical characteristics, bus timing, and pin de-
scriptions other than X1, X2, V
BAT
, and RCLR, see the
DS1286 Watchdog Timekeeper data sheet.
相關PDF資料 |
PDF描述 |
|---|---|
| DS1286 | Watchdog Timekeeper(看門狗計時器芯片) |
| DS1287A | Real Time Clock(實時時鐘) |
| DS1287 | Real Time Clock(實時時鐘) |
| DS12885 | Real Time Clock(實時時鐘) |
| DS12885Q | Real Time Clock(實時時鐘) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1284+ | 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 |
| DS1284N | 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 |
| DS1284Q | 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 |
| DS1284Q/T&R | 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER WATCHDOG 28-PLCC |
| DS1284Q/T&R | 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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