- 您现在的位置：买卖IC网 > Datasheet目录39 > DS1825U+T&R (Maxim Integrated)IC THERMOMETER DIGITAL 8-USOP Datasheet资料下载
参数资料
| 型号： | DS1825U+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 17/21页 |
| 文件大小： | 287K |
| 描述： | IC THERMOMETER DIGITAL 8-USOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 3,000 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±2°C（最小值） |
| 拓扑： | 寄存器库，变签式暂存器 |
| 输出类型： | 数字 |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 3.7 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
17 of 21
Figure 15. READ/WRITE TIME SLOT TIMING DIAGRAM
READ TIME SLOTS
The DS1825 can only transmit data to the master when the master issues read time slots. Therefore, the master
must generate read time slots immediately after issuing a Read Scratchpad [BEh] or Read Power Supply [B4h]
command, so that the DS1825 can provide the requested data. In addition, the master can generate read time slots
after issuing Convert T [44h] or Recall E
2
[B8h] commands to find out the status of the operation as explained in
the DS1825 FUNCTION COMMAND section.
All read time slots must be a minimum of 60ms in duration with a minimum of a 1ms recovery time between slots. A
read time slot is initiated by the master device pulling the 1-Wire bus low for a minimum of 1ms and then releasing
the bus (see Figure 14). After the master initiates the read time slot, the DS1825 will begin transmitting a 1 or 0 on
bus. The DS1825 transmits a 1 by leaving the bus high and transmits a 0 by pulling the bus low. When transmitting
a 0, the DS1825 will release the bus by the end of the time slot, and the bus will be pulled back to its high idle state
by the pullup resister. Output data from the DS1825 is valid for 15ms after the falling edge that initiated the read
time slot. Therefore, the master must release the bus and then sample the bus state within 15ms from the start of
the slot.
Figure 15 illustrates that the sum of T
INIT
, T
RC
, and T
SAMPLE
must be less than 15ms for a read time slot. Figure 16
shows that system timing margin is maximized by keeping T
INIT
and T
RC
as short as possible and by locating the
master sample time during read time slots towards the end of the 15ms period.
45 ms
15 ms
V
PU
GND
1-WIRE BUS
60 ms < T
X
0 < 120 ms
1 ms < T
REC
< ?/SPAN>
DS1825 Samples
MIN TYP MAX
15 ms
30 ms
> 1 ms
MASTER WRITE 0 SLOT
MASTER WRITE 1 SLOT
V
PU
GND
1-WIRE BUS
15 ms
MASTER READ 0 SLOT
MASTER READ 1 SLOT
Master samples
Master samples
START
OF SLOT
START
OF SLOT
> 1 ms
1 ms < T
REC
< ?/SPAN>
15 ms
15 ms
30 ms
15 ms
DS1825 Samples
MIN TYP MA
LINE TYPE LEGEND
Bus master pulling low
DS1825 pulling low
Resistor pullup
> 1 ms
相关PDF资料 |
PDF描述 |
|---|---|
| DS1842N+T&R | IC CURRENT MONITOR 14TDFN |
| DS18B20+PAR | IC THERM MICROLAN PROG-RES TO-92 |
| DS18B20Z/T&R | IC THERM MICROLAN PROG-RES 8SOIC |
| DS2740U+T&R | IC CURRENT GAUGE(15BIT) 8UMAX |
| DS28EA00U+T&R | IC THERMOMETER 1-WIRE 8-USOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1830 | 功能描述:监控电路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1830+ | 功能描述:监控电路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1830A | 功能描述:监控电路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1830A+ | 功能描述:监控电路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1830AS | 功能描述:监控电路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。