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參數(shù)資料
| 型號： | DS1629S+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 3/23頁 |
| 文件大小： | 490K |
| 描述： | IC THERM/RTC/CALENDAR DIG 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | 溫度計(jì)，恒溫計(jì) |
| 傳感器類型： | 內(nèi)部 |
| 感應(yīng)溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C（最小值） |
| 拓?fù)洌?/td> | ADC，比較器，振蕩器，寄存器庫 |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報(bào)： | 是 |
| 輸出風(fēng)扇： | 無 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
DS1629
3 of 23
The real-time clock/calendar maintains a BCD count of seconds, minutes, hours, day of the week, day of
the month, month, and year. It does so with an internal oscillator/ divider and a required 32.768kHz
crystal. The end of the month date is automatically updated for months with less than 31 days, including
compensation for leap years through the year 2100. The clock format is configurable as a 12- (power-up
default) or 24-hour format, with an AM/PM indicator in the 12-hour mode. The RTC can be shut down
by clearing a bit in the clock register.
The crystal frequency is internally divided by a factor that the user defines. The divided output is buffered
and can be used to clock a microcontroller.
The DS1629 features an open-drain alarm output. It can be configured to activate on a thermal event, time
event, either thermal or time, or neither thermal nor time (disabled, power-up state). The thermal alarm
becomes active when measured temperature is greater than or equal to the value stored in the TH
thermostat register. It will remain active until temperature is equal to or less than the value stored in TL,
allowing for programmable hysteresis. The clock alarm will activate at the specific minute of the week
that is programmed in the clock alarm register. The time alarm is cleared by reading from or writing to
either the clock register or the clock alarm register.
The DS1629 configuration register defines several key items of device functionality. It sets the
conversion mode of the digital thermometer and what event, if any, will constitute an alarm condition. It
also sets the active state of the alarm output. Finally, it enables/disables and sets the division factor for the
oscillator output.
The DS1629 also features 32 bytes of SRAM for storage of general information. This memory space has
no bearing on thermometer or chronograph operation. Possible uses for this memory are time/temperature
histogram storage, thermal data logging, etc.
Digital data is written to/read from the DS1629 via a 2-wire interface, and all communication is MSb
first. Individual registers are accessed by unique 8-bit command protocols.
The DS1629 features a wide power supply range (2.2V d V
DD
d 5.5V) for clock functionality, SRAM
data retention, and 2-wire communication. EEPROM writes and temperature conversions should only be
performed at 2.7V d V
DD
d 5.5V for reliable results.
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