TC6501 datasheet(5/17 Pages) MICROCHIP

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 2004 Microchip Technology Inc.

DS21451D-page 5

TC6501/2/3/4

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Ground

Connect the device ground pins directly to the PCB

ground and minimize the length of the connection. The

thermal resistance to the die is at a minimum at Pin 2.

3.2

Hysteresis Input (HYST)

Either 2°C (GND) or 10°C (VCC) of hysteresis is

selected by connecting HYST to GND or VCC.

3.3

Supply Input (VCC)

A 100 pF or greater decoupling capacitor from VCC to

GND is recommended.

3.4

Open-Drain, Active-Low Output

(TC6501) (TOVER)

The voltage at the TOVER pin is equal to a logic-low

level if the sensor detects a temperature that is greater

than the factory-programmed threshold temperature.

Because this is an open-drain output, an external pull-

up resistor is required (a 100 k

Ω pull-up resistor is

recommended). The voltage on this pin can be higher

than VCC, though the voltage must not exceed the

absolute maximum input voltage of 7.0V.

3.5

Push/Pull Active-High Output

(TC6502) (TOVER)

The voltage at TOVER is equal to a logic-high level if the

sensor detects a temperature greater than the factory-

programmed threshold temperature.

3.6

Open-Drain, Active-Low Output

(TC6503) (TUNDER)

The voltage at the TUNDER pin is equal to a logic-low

level if the sensor detects a temperature that is less

than the factory-programmed threshold temperature.

Because this is an open-drain output, an external pull-

up resistor is required (a 100 k

Ω pull-up resistor is

recommended). The voltage on this pin can be higher

than VCC, though the voltage must not exceed the

absolute maximum input voltage of 7.0V

3.7

Push/Pull Active-High Output

(TC6504) (TUNDER)

The voltage at TUNDER is equal to a logic-high level if

the sensor detects a temperature less than the factory-

programmed threshold temperature.

TC6501

TC6502

TC6503

TC6504

Symbol

Description

1, 2

1, 21, 21, 2GND

Ground

HYST

Hysteresis Input

VCC

Supply Input (+2.7V to +5.5V)

———

TOVER

Open-Drain, Active-Low Output

—5

——

TOVER

Push/Pull Active-High Output

——

—

TUNDER

Open-Drain, Active-Low Output

——

—

TUNDER

Push/Pull Active-High Output

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