EMC2113 datasheet(12/88 Pages) MICROCHIP

12 / 88 page

RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

Datasheet

DS20005251A-page 12

 2013 Microchip Technology Inc.

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.

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

Power

SHDN_SEL

Selects the hardware shutdown channel and

operating mode

AIO

TRIP_SET

Voltage input to set the Critical/Thermal

Shutdown threshold

AIO

DN2 / DP3

DN2 - Negative (cathode) connection for

External Diode 2

AIO

DP3 - Positive (anode) connection for

External Diode 3

AIO

DP2 / DN3

DP2 - Positive (anode connection for External

Diode 2

AIO

DN3 - Negative (cathode) connection for

External Diode 3

AIO

Table 3.2 Pin Types

PIN TYPE

DESCRIPTION

Power

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.

AIO

Analog Input / Output - this pin is used as an I/O for analog signals.

Push / Pull Digital Output - this pin is used as a digital output. It can both source

and sink current.

DIO

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.

Table 3.1 Pin Description for EMC2113-1 (continued)

PIN NUMBER

PIN NAME

PIN FUNCTION

PIN TYPE

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