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參數(shù)資料
| 型號(hào)： | DS1683S+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC REAL TIME EVENT REC 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 耗用時(shí)間計(jì)數(shù)器 |
| 特點(diǎn)： | 警報(bào)器，EEPROM |
| 存儲(chǔ)容量： | 16B |
| 時(shí)間格式： | 二進(jìn)制 |
| 數(shù)據(jù)格式： | 二進(jìn)制 |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | * |
| 封裝/外殼： | * |
| 供應(yīng)商設(shè)備封裝： | * |
| 包裝： | * |
DS1683
Total-Elapsed-Time and Event Recorder with Alarm
16
Maxim Integrated
Sample Applications
Figure 4 shows the DS1683 measuring total run time and
operating from a battery with the ALARM pin connected
to an LED. When the trigger switch is closed, the EVENT
pin is pulled high and the ETC register begins increment-
ing. When the trigger switch is opened, the EVENT pin is
pulled low by the resistor, the ETC register stops incre-
menting, the Event Counter register is incremented by
one, and the values of both the ETC and Event Counter
are stored in shadowed EEPROM. When the ETC or
Event Counter alarm conditions are met, the ALARM pin
pulls active low (the factory default setting), and current
flows through the LED, indicating an alarm condition.
Figure 5 shows the DS1683 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 tW. A capacitor maintains VCC on the
DS1683 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 30FF 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 DS1683
is at least tW.
Figure 6 shows the DS1683 in a total time-of-use applica-
tion with power that can be removed at the same time as
the end of the event. In this application, the VCC slew rate
at power-down is slow with respect to tW. The external
RST IC ends the event as VCC begins to drop. VCC must
remain above 2.5V until the end of tW.
because the state of the EVENT pin is tied VCC. Because
the EVENT pin is a logic 1 while VCC is applied, I2C write
commands are disabled, thus only I2C read commands
are possible in these configurations.
Figure 4. Total Run Time
Figure 5. Total Time-of-Use Application with Fast VCC Slew
Rate (Read-Only)
Figure 6. Total Time-of-Use Application with Slow VCC Slew
Rate (Read-Only)
DS1683
VCC
EVENT
TRIGGER SWITCH
LED
SCL
ALARM
SDA
GND
0.01F
DS1683
VCC
EVENT
LED
SCL
ALARM
SDA
GND
0.01F
30F
VCC
DS1683
VCC
ALARM
LED
SCL
EVENT
SDA
GND
0.01F
VCC
RESET
IC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1685 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
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| DS1685_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
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| DS1685-3 | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
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