TC651 Microchip Technology Inc., TC651 Datasheet - Page 6

• Manufacturer Part Number: TC651
• Description: Tiny Integrated Temperature Sensor & Brushless Dc Fan Controller With Overtemperature Alert
• Manufacturer: Microchip Technology Inc.

TC650/TC651
3.0
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
3.1
May be independent of fan power supply.
3.2
During Shutdown mode, the chip still monitors
temperature. T
factory set point.
3.3
Ground return for all TC650/TC651 functions.
DS21450C-page 6
Pin No.
1
2
3
4
5
6
7
8
PIN DESCRIPTION
Fan Shutdown, Active-low Input
Ground
Power Supply Input
OVER
PIN FUNCTION TABLE
Symbol
SHDN
T
PWM
GND
GND
V
OVER
is low if temperature rises above
NC
NC
DD
Power Supply Input
No Internal Connect
Fan Shutdown, Active-low Input
1 = Fan in normal operation
0 = Fan in shutdown
Ground
No Connect
Overtemperature Alert, Active-low Output
1 = Overtemperature condition does not exist
0 = The device is in the overtemperature condition. The fan is driven at 100%.
Ground
PWM Fan Drive Output
Potential exists for system over-heating
3.4
Active-low output.
3.5
Pulse width modulated rail-to-rail logic output. Nominal
frequency is 15 Hz.
Description
Overtemperature Alert
PWM Fan Drive Output
 2004 Microchip Technology Inc.