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参数资料
| 型号： | DS1284Q |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 1/3页 |
| 文件大小： | 143K |
| 代理商： | DS1284Q |
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072799
FEATURES
§ Keeps track of hundredths of seconds,
seconds, minutes, 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 address 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
A when power is supplied from
battery input
§ Optional
industrial
temperature
range
available on 28-pin PLCC (-40°C to +85°C)
PIN ASSIGNMENT
PIN DESCRIPTION
INTA
- Interrupt Output A (open drain)
INTB
(INTB) - Interrupt Output B (open drain)
A0-A5
- Address Inputs
DQ0-DQ7
- Data Input/Output
CE
- Chip Enable
OE
- Output Enable
WE
- Write Enable
VCC
- +5 Volts
GND
- Ground
NC
- No Connection
SQW
- Square Wave Output
X1,X2
- 32.768 kHz Crystal Connections
VBAT
- +3 Volt Battery Input
RCLR
- RAM Clear
DESCRIPTION
The DS1284 Watchdog Timekeeper Chip is a self-contained real-time clock, alarm, watchdog timer, and
interval 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 conditions, electrical characteristics, bus
timing, and pin descriptions other than X1, X2, VBAT, and RCLR , see the DS1286 Watchdog Timekeeper
data sheet.
DS1284
Watchdog Timekeeper Chip
www.dalsemi.com
DS1284
28-Pin DIP (600-mil)
DS1284
28-Pin PLCC
13
27
X2
A5
A3
A2
A1
A0
DQ0
DQ1
GND
DQ2
VCC
INTB(INTB)
SQW
OE
GND
CE
DQ7
DQ6
DQ5
DQ3
DQ4
1
2
3
4
5
6
7
8
9
10
11
12
14
28
26
25
24
23
22
21
20
19
18
17
15
16
X1
NC
A4
INTA
A5
A4
A3
A2
A1
A0
VBAT
RCLR
SQW
OE
GND
CE
DQ0
DQ7
WE
NC
X2
X1
INTA
VCC
WE
INTB(INTB)
DQ1
DQ2
GND
DQ3
DQ4
DQ5
DQ6
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
VBAT
RCLR
相关PDF资料 |
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|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1284Q/T&R/C03 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1284Q/T&R/C07 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1284Q+ | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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