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| 型号： | TC670ECHTR |
| 厂商： | Microchip Technology |
| 文件页数： | 5/14页 |
| 文件大小： | 354K |
| 描述： | IC FAN FAILURE DETECTOR SOT23A-6 |
| 标准包装： | 1 |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部 |
| 感应温度： | -40°C ~ 85°C |
| 拓扑： | 振荡器 |
| 输出类型： | 开路漏极 |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 683 (CN2011-ZH PDF) |
| 其它名称： | TC670ECHTRDKR |
?2003 Microchip Technology Inc.
DS21688C-page 5
TC670
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Analog Input (THRESHOLD)
The voltage set at the THRESHOLD input represents
the fan speed at which the TC670 will signal a fan
speed warning by pulling the ALERT
output low. The
threshold voltage to fan speed correlation can be seen
in Figures 2-2 and 2-3.
3.2
Ground (GND)
The GND pin (Pin 2) of the TC670 should be connected
directly to the analog ground plane of the circuit board.
Care should be taken to keep this pin away from
switching signals, such as the fan excitation signals in
order to avoid false signals on the SENSE pin.
3.3
Digital Input (CLEAR)
The CLEAR input is used to reset or blank the ALERT
output. When the CLEAR input is driven high, the
ALERT
output will be high-impedance (the ALERT
output requires a pull-up resistor).
3.4
Bias Supply Input (V
DD
)
Bias Supply Input, 3.0V to 5.5V. The bias supply input
should be bypassed to ground with a 0.1 礔 ceramic
capacitor.
3.5
Digital (Open-Drain) Output
(ALERT
)
The ALERT
output is an open-drain output that
requires an external pull-up resistor. The ALERT
output
is pulled low when the sensed fan speed (detected by
the pulses occurring at the SENSE input) falls below
the speed that is represented by the voltage at the
THRESHOLD pin. The ALERT
output is latched in this
state until power is cycled or the CLEAR input is
toggled.
3.6
Analog Input (SENSE)
Voltage pulses, which are generated by the fan current
flowing through a sense resistor, are detected at the
SENSE pin and used to calculate the fan speed.
Pin
No.
Symbol
Description
1
THRESHOLD Analog Input
2
GND
Ground Terminal
3
CLEAR
Digital Input
4
VDD
Bias Supply Input
5
ALERT
Digital (Open-Drain) Output
6
SENSE
Analog Input
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC670ECHTR | 制造商:Microchip Technology Inc 功能描述:IC CONTROLLER FAN MANAGEMENT 制造商:Microchip Technology Inc 功能描述:IC, CONTROLLER, FAN MANAGEMENT |
| TC670ECHTR | 制造商:Microchip Technology Inc 功能描述:Fan Management Controller IC Package/Cas |
| TC670ECHTR-CUT TAPE | 制造商:Microchip 功能描述:TC670 Series 3 to 5.5 V Tiny Predictive Fan Failure Detector - SOT-23-6 |
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