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MICROCHIP  TC670ECHTR  Fan Failure, 3V-5.5V Supply, 124 mV Threshold, Active-Low, Push-Pull, SOT-23-6

MICROCHIP TC670ECHTR
Technical Data Sheet (354.95KB) EN See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The TC670ECHTR is an integrated Fan Speed Sensor predicts or detects fan failure, preventing thermal damage to systems with cooling fans. When the fan speed falls below user-specified level, the TC670 asserts an ALERT signal. With this design, a critical minimum fan speed is determined by the user. The fan alert level is then set with a resistor divider on the THRESHOLD pin (Pin 1) of the TC670. When the minimum fan speed is reached, the ALERT pin (Pin 5) changes from a digital high to low. This failure detection works with all linear-controlled 2-wire fans. The TC670 eliminates the need for 3-wire fan solutions. A CLEAR option can be used to reset the ALERT signal, allowing the flexibility of connecting the ALERT output of the TC670 with other ALERT/FAULT interrupts in the system. This feature can be implemented so that false fan fault conditions do not initiate system shutdown.
  • Fan wear-out detection for 2-wire linear-controlled fans
  • Replacement system for 3-wire fans
  • Fan alert signal when fan speed is below programmed threshold
  • CLEAR capability for eliminating false alarm
  • 90µA Typical low operating current

 

Product Information

Threshold Voltage:
124mV
No. of Supervisors / Monitors:
1Monitors
Supply Voltage Min:
3V
Supply Voltage Max:
5.5V
Reset Type:
Active-Low, Push-Pull
Digital IC Case:
SOT-23
No. of Pins:
6Pins
Delay Time:
-
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Cut Tape
Product Range:
-
MSL:
MSL 1 - Unlimited
Supply Voltage Range:
3V to 5.5V
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Automation & Process Control;
  • Portable Devices;
  • Sensing & Instrumentation

Legislation and Environmental

Moisture Sensitivity Level:
MSL 1 - Unlimited
Product Traceability
RoHS Compliant:
Yes

Substitutes

Fan Failure Detector, 3V-5.5V Supply, SOT23-6

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