MCP9510 datasheet(9/28 Pages) MICROCHIP

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DS22114A-page 9

MCP9509/10

3.0

PIN DESCRIPTIONS

TABLE 3-1:

PIN FUNCTION TABLE

3.1

External Resistor Input (SET)

This pin is used to connect a resistor between the SET

and GND pins to select the temperature trip point

(TSET). The resistor value can be determined either

from Equation 4-2 or the lookup table shown in

Table 4-2.

3.2

Ground (GND)

The GND pin is the system ground pin.

3.3

Hysteresis Input (HYS)

This is an input pin which can be connected to VDD or

GND

select

output

hysteresis.

Either

2°C

(HYS = GND) or 10°C (HYS = VDD) of hysteresis can

be selected.

3.4

Power Pin (VDD)

The operating voltage range, as specified in the DC

electrical specification table, is applied on this pin.

3.5

Open-Drain Output (OUT)

(MCP9509)

This output is triggered when temperature exceeds the

programmed trip temperature. This pin requires a

pull-up resistor.

3.6

Selectable Output (OUT, OUT)

(MCP9510)

The output pin can be configured as either a Push-Pull

Active-High, Push-Pull Active-Low, or an Open-drain

Output with an internal pull-up resistor. The three

output options of the MCP9510 are selected by the

OUTSET pin.

3.7

Output Control (OUTSET)

(MCP9510)

The OUTSET pin is used to select the desired

configuration of the OUT or OUT pin.

TABLE 3-1:

OUTSET SELECTABLE

OUTPUTS

MCP9509 MCP9510

Symbol

Description

SOT-23-5

SOT-23-6

SET

External Trip Temperature Resistor (RSET) input

GND

Ground

3—

OUT

Open-drain output

—3

OUT,

OUT

Selectable Output pin,

function set by OUTSET pin

HYS

Hysteresis Input

HYS = GND, hysteresis is 2°C

HYS = VDD, hysteresis is 10°C

VDD

Power pin

—

OUTSET Output Control

OUTSET = GND, Active-Low, Push-Pull

OUTSET = VDD, Active-High, Push-Pull

OUTSET = Unconnected, Active-Low, Open-Drain with an internal pull-up

OUTSET Pin

OUT / OUT Pin

GND

Push-Pull, Active-Low

VDD

Push-Pull, Active-High

unconnected

(i.e. open)

Open-Drain output with an

internal pull-up resistor of

100 k

Ω (typical)

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