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參數(shù)資料
| 型號： | DS1825UTR |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID |
| 中文描述： | 可編程的1 - Wire數(shù)字溫度計，具有4位ID |
| 文件頁數(shù)： | 18/21頁 |
| 文件大小： | 298K |
| 代理商： | DS1825UTR |
DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
Figure 16. DETAILED MASTER READ 1 TIMING
Figure 17. RECOMMENDED MASTER READ 1 TIMING
DS1825 OPERATION EXAMPLE
In this example there are multiple DS1825s on the bus and they are using parasite power. The bus master initiates
a temperature conversion in a specific DS1825 and then reads its scratchpad and recalculates the CRC to verify
the data.
MASTER MODE
DATA (LSB FIRST)
TX
Reset
Master issues reset pulse.
RX
Presence
DS1825s respond with presence pulse.
Master issues Search ROM command and builds
Crossreference Table
TX
Reset
Master issues reset pulse.
RX
Presence
DS1825s respond with presence pulse.
TX
55h
Master issues Match ROM command for desired address
TX
64-bit ROM code
Master sends DS1825 ROM code.
TX
44h
Master issues Convert T command.
DQ line held high by
strong pullup
conversion (t
conv
).
TX
Reset
Master issues reset pulse.
RX
Presence
DS1825s respond with presence pulse.
TX
55h
Master issues Match ROM command.
TX
64-bit ROM code
Master sends DS1825 ROM code.
TX
BEh
Master issues Read Scratchpad command.
Master reads entire scratchpad including CRC. The master
then recalculates the CRC of the first eight data bytes from the
scratchpad and compares the calculated CRC with the read
CRC (byte 9). If they match, the master continues; if not, the
read operation is repeated.
18 of 21
COMMENTS
TX
F0h
TX
Master applies strong pullup to DQ for the duration of the
RX
9 data bytes
V
PU
GND
1-WIRE BUS
15 s
VIH of Master
T
RC
T
INT
> 1 s
Master samples
LINE TYPE LEGEND
Bus master pulling low
Resistor pullup
V
PU
GND
1-WIRE BUS
15 s
VIH of Master
T
=
small
T
=
small
Master samples
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1830 | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830AS | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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