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参数资料
| 型号： | DS1284Q+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/18页 |
| 文件大小： | 0K |
| 描述： | IC TIMEKEEPER WATCHDOG 28-PLCC |
| 标准包装： | 500 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出，SRAM，监视计时器 |
| 存储容量： | 50B |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.4 V ~ 3.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 带卷 (TR) |
DS1284/DS1286
3 of 18
PIN DESCRIPTION
PIN
DIP
EDIP
PLCC
NAME
FUNCTION
1
INTA
Active-Low Interrupt Output A. This open-drain pin requires a
pullup resistor for proper operation.
2, 3
—
2, 3
X1, X2
Connections for Standard 32.768kHz Quartz Crystal. The internal
oscillator circuitry is designed for operation with a crystal having
a specified load capacitance (CL) of 6pF. The crystal is connected
directly to the X1 and X2 pins. There is no need for external
capacitors or resistors. For more information on crystal selection
and crystal layout considerations, refer to Application Note 58:
Crystal Considerations with Dallas Real Time Clocks.
4
2, 3, 4,
21, 24,
25
4
N.C.
No Connection
5–10
A5–A0
Address Inputs
11, 12,
13, 15,
16–19
11, 12,
13, 15,
16–19
11, 12,
13, 15,
16–19
DQ0, DQ1,
DQ2, DQ3,
DQ4–DQ7
Data Input/Output
14, 21
14
14, 21
GND
Ground
20
CE
Active-Low Chip-Enable Input
22
OE
Active-Low Output-Enable Input
23
SQW
Square-Wave Output. Push-pull output. High impedance when
VCC is below VTP.
24
—
24
RCLR
Active-Low RAM Clear. Used to clear (set to logic 1) all 50
bytes of user NV RAM, but does not affect the registers
involved with time, alarm, and watchdog functions. To clear the
RAM,
RCLR must be forced to an input logic 0 (-0.3V to
+0.8V) during battery-backup mode when VCC is not applied.
The
RCLR function is designed to be used via human interface
(shorting to ground or by switch) and not be driven with external
buffers. This pin is internally pulled up and should be left
floating when not in use.
25
—
25
VBAT
Input for Any Standard 3V Lithium Cell or Other Energy
Source. Input voltage must be held between the minimum and
maximum limits for proper operation. The supply should be
connected directly to the VBAT pin. A diode must not be placed
in series with the battery to the VBAT pin. Furthermore, a diode is
not necessary because reverse charging current-protection
circuitry is provided internal to the device and has passed the
requirements of Underwriters Laboratories for UL listing. This
pin should be grounded but can be left floating.
26
INTB
(INTB)
Active-Low (Active-High) Interrupt Output B. When the active-
high state is selected (IBH = 1), an open-drain pullup transistor
connected to VCC sources current when the output is active.
When the active-low state is selected (IBH = 0), an open-drain
pulldown transistor connected to ground sinks current when the
output is active. If active-high output operation is selected, a
pulldown resistor is required for proper operation. When active-
low output operation is selected, a pullup resistor is required for
proper operation.
27
WE
Active-Low Write-Enable Input
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1285Q | 制造商:Maxim Integrated Products 功能描述: |
| DS1286 | 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 |
| DS1286+ | 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 |
| DS1286I | 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 |
| DS1286I+ | 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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