EMC2302 Standard Microsystems Corp., EMC2302 Datasheet - Page 8

• Manufacturer Part Number: EMC2302
• Description: Rpm-based Pwm Fan Controller
• Manufacturer: Standard Microsystems Corp.

APPLICATION NOTE: For the 5V tolerant pins that have a pull-up resistor, the voltage difference between VDD and
Revision 1.2 (03-22-10)
PIN NUMBER
10
9
The pin types are described in detail below. All pins labeled with (5V) are 5V tolerant.
PIN TYPE
the 5V tolerant pad must never be more than 3.6V.
Power
DIOD
DO
OD
DI
PIN NAME
Table 1.1 Pin Description for EMC2302 (continued)
ALERT#
CLK
Table 1.2 Pin Types
DATASHEET
Clock input for tachometer measurement
Active low interrupt - requires external
controllers to synchronize Fan Speed
Push Pull Clock output to other fan
This pin is used to supply power or ground to the device.
Digital Input - this pin is used as a digital input. This pin is
5V tolerant.
Push / Pull Digital Output - this pin is used as a digital
output. It can both source and sink current.
Digital Input / Open Drain Output this pin is used as a
digital I/O. When it is used as an output, it is open drain
and requires a pull-up resistor. This pin is 5V tolerant.
Open Drain Digital Output - this pin is used as a digital
output. It is open drain and requires a pull-up resistor. This
pin is 5V tolerant.
8
PIN FUNCTION
pull-up resistor.
Control
DESCRIPTION
Dual RPM-Based PWM Fan Controller
PIN TYPE
OD (5V)
SMSC EMC2302
DI (5V)
DO
Datasheet