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TC651CEUA Datasheet(PDF) 6 Page - STMicroelectronics |
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TC651CEUA Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 16 page TC650/TC651 DS21450C-page 6 2004 Microchip Technology Inc. 3.0 PIN DESCRIPTION The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3.1 Power Supply Input May be independent of fan power supply. 3.2 Fan Shutdown, Active-low Input During Shutdown mode, the chip still monitors temperature. TOVER is low if temperature rises above factory set point. 3.3 Ground Ground return for all TC650/TC651 functions. 3.4 Overtemperature Alert Active-low output. 3.5 PWM Fan Drive Output Pulse width modulated rail-to-rail logic output. Nominal frequency is 15 Hz. Pin No. Symbol Description 1VDD Power Supply Input 2 NC No Internal Connect 3 SHDN Fan Shutdown, Active-low Input 1 = Fan in normal operation 0 = Fan in shutdown 4 GND Ground 5 NC No Connect 6 TOVER 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%. Potential exists for system over-heating 7 GND Ground 8 PWM PWM Fan Drive Output |
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