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參數(shù)資料
| 型號： | DS3234SN# |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/21頁 |
| 文件大小： | 0K |
| 描述： | IC RTC W/TCXO 20-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 36 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，NVSRAM，方波輸出，TCXO/晶體 |
| 存儲容量： | 256B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 電源電壓： | 2 V ~ 5.5 V |
| 電壓 - 電源，電池： | 2 V ~ 3.8 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SOIC W |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1434 (CN2011-ZH PDF) |
DS3234
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
____________________________________________________________________
19
Data transfers can occur one byte at a time or in multi-
ple-byte burst mode. After CS is driven low, an address
is written to the DS3234. After the address, one or more
data bytes can be written or read. For a single-byte
transfer, one byte is read or written and then CS is dri-
ven high. For a multiple-byte transfer, however, multiple
bytes can be read or written after the address has been
written (Figure 5). Each read or write cycle causes the
RTC register address to automatically increment, which
continues until the device is disabled. The address
wraps to 00h after incrementing to 13h (during a read)
and wraps to 80h after incrementing to 93h (during a
write). An updated copy of the time is loaded into the
user buffers upon the falling edge of CS and each time
the address pointer increments from 13h to 00h.
Because the internal and user copies of the time are
only synchronized on these two events, an alarm condi-
tion can occur internally and activate the INT/SQW pin
independently of the user data.
If the SRAM is accessed by reading (address 19h) or
writing (address 99h) the SRAM data register, the con-
tents of the SRAM address register are automatically
incremented after the first access, and all data cycles
will use the SRAM data register.
Handling, PC Board Layout,
and Assembly
The DS3234 package contains a quartz tuning-fork
crystal. Pick-and-place equipment can be used, but
precautions should be taken to ensure that excessive
shock and vibration are avoided. Exposure to reflow is
limited to 2 times maximum. Ultrasonic cleaning should
be avoided to prevent damage to the crystal.
Avoid running signal traces under the package, unless
a ground plane is placed between the package and the
signal line. All N.C. (no connect) pins must be connect-
ed to ground.
CS
SCLK
DIN
DOUT
HIGH IMPEDANCE
ADDRESS
BYTE
ADDRESS
BYTE
DATA BYTE 0
DATA BYTE 1
DIN
DATA BYTE N
DATA
BYTE 0
DATA
BYTE 1
DATA
BYTE N
WRITE
READ
Figure 5. SPI Multiple-Byte Burst Transfer
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS3234SN# | 功能描述:實時時鐘 Integrated RTC/TCXO/Crystal 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS3234SN#T&R | 制造商:Maxim Integrated Products 功能描述:SPI BUS RTC W/INTEGR CRYSTAL AND SRAM 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 256BYTE 20SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC SPI BUS W/TCXO 20-SOIC |
| DS3234SN#T&R | 功能描述:實時時鐘 Integrated RTC/TCXO/Crystal 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS3234SN#TR | 制造商:Maxim Integrated Products 功能描述:ACCURATE SPI BUS RTC WITH INTEGRATED CRYSTAL AND SRAM/ROHS - Bulk |
| DS3234SN+ | 功能描述:實時時鐘 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 時間格式:HH:MM:SS RTC 存儲容量: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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