RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Table 2.1 Pin Description for EMC2103 (continued)
PIN NUMBER
PIN NUMBER
EMC2103-1
EMC2103 -2
PIN NAME
PIN FUNCTION
PIN TYPE
GPI2 - General Purpose Input
(default)
DI (5V)
N/A
5
GPIO2
GPO2 - Open Drain digital output
GPO2 - Push-pull digital output
OD (5V)
DO
Active low interrupt - requires
external pull-up resistor.
4
5
6
6
7
8
ALERT
SYS_SHDN
SMDATA
OD (5V)
OD (5V)
Active low Critical / Thermal
Shutdown output - requires external
pull-up resistor
SMBus data input/output - requires
external pull-up resistor
DIOD (5V)
SMBus clock input - requires
external pull-up resistor
7
8
9
SMCLK
TACH
DI (5V)
DI (5V)
10
Tachometer input for the Fan
PWM - Open Drain PWM drive
output for the Fan
(default)
OD (5V)
9
11
PWM
PWM - Push-Pull PWM drive output
for the Fan
DO
Power
AIO
10
11
12
13
GND
Ground connection
Selects the hardware shutdown
channel and operating mode
SHDN_SEL
Voltage input to set the Critical /
Thermal Shutdown threshold
12
14
15
TRIP_SET
DN2 / DP3
AIO
AIO
Negative (cathode) analog input for
External Diode 2 and positive
(anode) analog input for External
Diode 3
N/A
Positive (anode) analog input for
External Diode 2 and negative
(cathode) connection for External
Diode 3
N/A
16
DP2 / DN3
AIO
The pin type are described in detail below. All pins labelled with (5V) are 5V tolerant.
SMSC EMC2103
Revision 0.85 (01-29-08)
DATAS11HEET
SMSC [ SMSC CORPORATION ]
