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参数资料
| 型号： | DS1780E |
| 厂商： | Maxim Integrated |
| 文件页数： | 3/28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： | 62 |
| 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： | 管件 |
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DS1780
OVERVIEW
A block diagram of the DS1780 is shown in Figure 1.
The DS1780 provides six analog inputs, an analog output, five digital inputs, two fan speed inputs, a
temperature sensor, and interrupt registers on a single chip, which communicates on a 2-wire serial bus.
The DS1780 performs power supply, temperature, and fan monitoring for personal computers.
The analog voltages are divided internally by the DS1780. The inputs are then converted to 8-bit digital
words. The analog inputs are intended to be connected to the several power supplies present in a typical
computer. Temperature can be converted to a 9-bit two’s-complement digital word with a 0.5°C LSb.
The analog output is approximately a 0-1.25V output from an 8-bit D/A converter, which is used to
control fan speeds.
Fan inputs measure the period of tachometer pulses from the fans, providing a higher count for lower fan
speeds. The fan inputs are digital inputs with an acceptable range of 0 to V DD volts and a transition level
of approximately 1.4 volts. Full-scale fan counts are 255 (8-bit counter) and this represents a stopped or
very slow fan. Nominal speeds, based on a count of 153, are programmable from 1100 to 8800 RPM on
FAN1 and FAN2. Signal conditioning circuitry is included to accommodate slow rise and fall times.
The DS1780 provides a number of internal registers, as detailed in Table 1. These include:
Configuration Register: Provides control and configuration, as well as initialization.
Interrupt ( INT ) Status Registers: Two registers to provide status of each interrupt limit or interrupt
event.
Interrupt ( INT ) Mask Registers: Allows masking of individual Interrupt sources, as well as separate
masking for the hardware interrupt output.
Temperature Configuration Register: The lower 2 bits of this register configure the type of
temperature interrupt mode to be used. Bit 7 reflects the lowest bit of the temperature reading.
VID Register, VID4 Register: Bits 0-3 of the VID register reflect the status of the VID0-VID3 pins, bit
0 of the VID4 register reflect the status of VID4 pin. These are simply input pins - not processed in any
way. In a multiprocessor system, these signals will be multiplexed externally from the various processor
sources, with the source being controlled by software.
Value RAM: The monitoring results and limits for temperature, voltages, and fan counts are all
contained in the Value RAM.
When the DS1780 is started, it cycles through each measurement in sequence, and it continuously loops
through the sequence approximately once every second. Each measured value is compared to values
stored in limit registers. When the measured value violates the programmed limit the DS1780 will set a
corresponding System Management Interrupt (SMI) in the Interrupt Status Registers. One hardware
interrupt line, INT , is available to generate an SMI. INT is fully programmable with masking of each
Interrupt source, and masking of the output. In addition, the configuration register has control bits to
enable or disable the hardware Interrupts.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1780E/T&R | 制造商:Maxim Integrated Products 功能描述:PC HARDWARE MONITOR T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CPU PERIPHERAL MON 24-TSSOP |
| DS1780E/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS1780E/TR | 制造商:Maxim Integrated Products 功能描述:Data Acquisition System, 6 Channel, 8 Bit, 24 Pin, Plastic, TSSOP |
| DS1780E+ | 功能描述:板上安装温度传感器 CPU Peripheral Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS1780E+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 24TSSOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CPU PERIPHERAL MON 24-TSSOP 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors CPU Peripheral Monitor |
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