EMC2102 Standard Microsystems Corporation, EMC2102 Datasheet - Page 30

• Manufacturer Part Number: EMC2102
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
5.8
5V Reset Controller
The EMC2102 also provides a ‘power-good’ reset controller for the system’s 5V supply rail. The reset
controller will set the RESET# pin to a logic ‘0’ after power-up and set the RESET# pin to a logic ‘1’
220ms after the VDD_5V supply rises above its threshold voltage (see
Table
3.2).
If the VDD_5V supply drops below the reset threshold, then the RESET# pin will be set to ‘0’
immediately.
VDD_5V
Reset Threshold (4.4V)
Reset Threshold -
hysteresis (4.3V)
VDD_3V or pull-up voltage
220ms
RESET#
Figure 5.6 5V Reset Controller Timing
Revision 1.95 (10-19-06)
30
SMSC EMC2102
DATASHEET