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| 型号： | DS1780E/T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | IC CPU PERIPHERAL MON 24-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 功能： | 温度监控器，CPU 外围设备 |
| 传感器类型： | 内部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±12°C（最小值） |
| 拓扑： | ADC（三角积分型），比较器，风扇速度控制，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 2.8 V ~ 5.75 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 带卷 (TR) |
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DS1780
DS1780 MONITORING ORDER Table 3
TEMPERATURE READING
ANALOG +2.5 V S /V CCP2
ANALOG +12V
ANALOG +5V
ANALOG +3.3V
ANALOG +2.5V
ANALOG +V CCP1
FAN1
FAN2
If conversions are terminated by either of the methods described in the “OPERATION - Configuration
Register” section, the current “round-robin” loop will be completed and the results stored in RAM.
Monitoring will then terminate. When the monitoring again commences, monitoring always starts with
the temperature reading.
OPERATION - Temperature Data Format
The DS1780 internally converts measured temperature data to a two’s complement data format (in °C).
The host can read the last completed temperature conversion at any time by setting the Internal Address
Register pointer to location 27h, and reading the 8 bits in the register. The format of the data is shown
below in Table 4. The MSb of the register represents the sign bit of the temperature reading. For
Fahrenheit usage, a lookup table or conversion routine must be used.
TEMPERATURE/DATA RELATIONSHIPS Table 4
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
TEMPERATURE
+125°C
+25°C
+1°C
0°C
-1°C
-25°C
-40°C
(unit = °C)
DIGITAL OUTPUT
(BINARY)
0111 1101
0001 1001
0000 0001
0000 0000
1111 1111
1110 0111
1101 1000
LSb
DIGITAL OUTPUT (HEX)
7Dh
19h
01h
00h
FFh
E7h
D8h
OPERATION - Voltage Data Format
The DS1780 contains inputs for directly monitoring the power supplies typically found in a PC (+12V, -
12V, +5V, +3.3V, +2.5V, +V CCP ). These inputs are scaled internally to a reference source, and converted
via an 8-bit Delta-Sigma ADC (Analog-to-Digital Converter), thus allowing for a more accurate means of
measurement since the voltages are referenced to a known value.
Since these inputs can be greater than V DD , they are not diode protected to the power rails. In addition,
small external series resistors such as 510 ? should be put into the lines driving the DS1780 to prevent
damaging the traces or power supplies should an accidental short connect two power supplies together.
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| DS17885 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock |
| DS17885-3 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS17885-3+ | 功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS17885-5 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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