RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown
Datasheet
Table 3.1 Pin Description for EMC2113-1 (continued)
PIN NUMBER
PIN NAME
PIN FUNCTION
PIN TYPE
SMBus data input/output - requires external
pull-up resistor
8
SMDATA
DIOD (5V)
SMBus clock input - requires external pull-up
resistor
9
SMCLK
TACH
DI (5V)
DI (5V)
OD (5V)
10
Tachometer input for the Fan
PWM - Open Drain PWM drive output for the
Fan (default)
11
PWM
PWM - Push Pull PWM drive output for the
fan
DO
Power
AIO
12
13
GND
Ground
Selects the hardware shutdown channel and
operating mode
SHDN_SEL
Voltage input to set the Critical/Thermal
Shutdown threshold
14
15
TRIP_SET
DN2 / DP3
AIO
AIO
AIO
AIO
AIO
DN2 - Negative (cathode) connection for
External Diode 2
DP3 - Positive (anode) connection for
External Diode 3
DP2 - Positive (anode connection for External
Diode 2
16
DP2 / DN3
DN3 - Negative (cathode) connection for
External Diode 3
The pin types are described in detail below. All pins labelled with (5V) are 5V tolerant.
Note: For all 5V tolerant pins that require a pull-up resistor, the pull-up voltage cannot exceed 3.6V
when the device is unpowered.
Table 3.2 Pin Types
PIN TYPE
DESCRIPTION
Power
DI
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.
Analog Input / Output - this pin is used as an I/O for analog signals.
AIO
Push / Pull Digital Output - this pin is used as a digital output. It can both source
and sink current.
DO
DIO
OD
Digital Input / Output this pin is used as a digital I/O. It can both source and
sink current.
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.
Revision 1.2 (10-08-09)
SMSC EMC2113
DATA1S2HEET
SMSC [ SMSC CORPORATION ]
