EMC2103 datasheet(11/85 Pages) MICROCHIP

11 / 85 page

RPM-Based Fan Controller with Hardware Thermal Shutdown

Datasheet

 2013 Microchip Technology Inc.

DS0005250A-page 11

The pin type are described in detail below. All pins labelled with (5V) are 5V tolerant.

APPLICATION NOTE: For the 5V tolerant pins that have a pull-up resistor, the voltage difference between VDD and

the 5V tolerant pad must never be more than 3.6V.

N/A

GPIO2

GPI2 - General Purpose Input

(default)

DI (5V)

GPO2 - Open Drain digital output

OD (5V)

GPO2 - Push-pull digital output

ALERT

Active low interrupt - requires

external pull-up resistor.

OD (5V)

SYS_SHDN

Active low Critical / Thermal

Shutdown output - requires external

pull-up resistor

OD (5V)

SMDATA

SMBus data input/output - requires

external pull-up resistor

DIOD (5V)

SMCLK

SMBus clock input - requires

external pull-up resistor

DI (5V)

TACH

Tachometer input for the Fan

DI (5V)

PWM

PWM - Open Drain PWM drive

output for the Fan

(default)

OD (5V)

PWM - Push-Pull PWM drive output

for the Fan

GND

Ground connection

Power

SHDN_SEL

Selects the hardware shutdown

channel and operating mode

AIO

TRIP_SET

Voltage input to set the Critical /

Thermal Shutdown threshold

AIO

N/A

DN2 / DP3

Negative (cathode) analog input for

External Diode 2 and positive

(anode) analog input for External

Diode 3

AIO

N/A

DP2 / DN3

Positive (anode) analog input for

External Diode 2 and negative

(cathode) connection for External

Diode 3

AIO

Table 2.1 Pin Description for EMC2103 (continued)

PIN NUMBER

EMC2103-1

PIN NUMBER

EMC2103-2 AND

EMC2103-4

PIN NAME

PIN FUNCTION

PIN TYPE

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