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参数资料
| 型号： | DS1682S+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC TIMEKEEPER ALARM ELAPSE 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 耗用时间计数器 |
| 特点： | 警报器，EEPROM |
| 存储容量： | 10B |
| 时间格式： | 二进制 |
| 数据格式： | 二进制 |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
Figure 2. Total Run Time
DS1682
VCC
EVENT
TRIGGER SWITCH
LED
SCL
PUSHBUTTON
SWITCH
ALARM
SDA
GND
0.01F
Operation
The block diagram in Figure 1 shows the relationship
between the major functional blocks, the serial interface,
and the EEPROM memory section of the DS1682. Upon
power-up, the DS1682 transfers the contents of the
EEPROM into the counters and memory registers where
the data can be read and written through the serial inter-
face. The content of the counters and memory registers
are written into the EEPROM memory when the EVENT
pin transitions from a logic-high to a logic-low.
The DS1682 uses a calibrated, temperature-compensat-
ed RC time base to increment an ETC while an event
is active. When the event becomes active, the contents
of the nonvolatile EEPROM are transferred to the ETC
and event counter and the oscillator starts. As the event
continues, the ETC is incremented in quarter-second
increments. When the event becomes inactive, the event
counter is incremented and the contents of the ETC and
event counter are written to the nonvolatile EEPROM.
The ALARM output can be used to indicate when the ETC
has matched the value in the alarm register.
The DS1682 can be configured to prevent clearing the
alarm and the elapsed time and event counters.The user
memory can be separately write protected.
User-modified data is not stored in EEPROM until an
event becomes inactive.
Figure 2 shows the DS1682 measuring total run time and
operating from a battery with the alarm tied to an LED and
a pushbutton switch to trigger the alarm output.
Figure 3 shows the DS1682 in a total time-of-use applica-
tion where power may be removed at the same time as
the end of the event. The VCC slew rate at power-down is
fast with respect to tEW. A capacitor maintains VCC on the
DS1682 above 2.5V until the EEPROM write completes. A
Schottky diode blocks current from the capacitor to other
devices connected to VCC.
The VCC holding capacitor value of 30μF is calculated
using the maximum EEPROM write current and EEPROM
write time. This assumes that the VCC slew rate allows
time from EVENT trip point to VCC at 2.5V on the DS1682
is at least tEW.
Figure 4 shows the DS1682 in a total time-of-use applica-
tion with power that can be removed at the sametime as
the end of the event. In this application, the VCC slew rate
at power-down is slow with respect to tEW. The external
reset IC (DS1816) ends the event as VCC begins to drop.
VCC must remain above 2.5V until the end of tEW.
Figure 3. Total Time-of-Use Application with Fast VCC Slew Rate
DS1682
VCC
EVENT
LED
SCL
ALARM
SDA
GND
0.01F
30F typ
VCC
Figure 4. Total Time-of-Use Application with Slow VCC Slew Rate
DS1682
VCC
ALARM
LED
SCL
EVENT
SDA
GND
0.01F
RPU = tR/CBUS
RPU
VCC
DS1816
DS1682
Total-Elapsed-Time Recorder
with Alarm
www.maximintegrated.com
Maxim Integrated │ 6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1682X | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Total Elapsed Time Recorder with Alarm |
| DS1683 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Total-Elapsed-Time and Event Recorder with Alarm |
| DS1683_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Total-Elapsed-Time and Event Recorder with Alarm |
| DS1683S | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Total-Elapsed-Time and Event Recorder with Alarm |
| DS1683S+ | 功能描述:实时时钟 T-E-T Recorder 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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