MCP9600 datasheet(13/50 Pages) MICROCHIP

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 2015-2016 Microchip Technology Inc.

DS20005426B-page 13

MCP9600

3.0

PIN DESCRIPTION

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

3.1

Ground Pin (GND)

The GND pin is the system ground pin. Pins 1, 3, 5, 13

and 17 are system ground pins and they are at the

same potential. However, pins 6, 7, 9, 10 and 18 must

be connected to ground for normal operation.

3.2

Thermocouple Input (VIN+, VIN-)

The thermocouple wires are directly connected to

these inputs. The positive node is connected to the

VIN+ pin while the negative node connects to the VIN-

node. The thermocouple voltage is converted to degree

Celsius.

3.3

Power Pin (VDD)

VDD is the power pin. The operating voltage range, as

specified in the DC Electrical Specification table, is

applied on this pin.

3.4

Push-Pull Alert Outputs

(Alert 1, 2, 3, 4)

The MCP9600’s Alert pins are user-programmable

push-pull outputs which can be used to detect rising or

falling temperatures. The device outputs signals when

the

ambient

temperature

exceeds

the

user-programmed temperature alert limit.

3.5

I2C Slave Address Pin (ADDR)

This pin is used to set the I2C slave address. This pin

can be tied to VDD, GND, or a ratio of VDD can be

selected to set up to eight address levels using a

resistive voltage divider network.

3.6

Serial Clock Line (SCL)

The SCL is a clock input pin. All communication and

timing is relative to the signal on this pin. The clock is

generated by the host or master controller on the bus

(see Section 4.0 “Serial Communication”).

3.7

Serial Data Line (SDA)

SDA is a bidirectional input/output pin used to serially

transmit data to/from the host controller. This pin

requires a pull-up resistor (see Section 4.0 “Serial

Communication”).

TABLE 3-1:

PIN FUNCTION TABLE

5x5 MQFN

Symbol

Pin Function

1, 3, 5,13, 17

GND

Electrical ground

2VIN+

Thermocouple Positive Terminal input

4VIN-

Thermocouple Negative Terminal input

6, 7, 9, 10, 18

GND

Not electrical ground; must be tied to ground

8VDD

Power

Alert 1

Alert Output 1

Alert 2

Alert Output 2

Alert 3

Alert Output 3

Alert 4

Alert Output 4

ADDR

I2C Save Address selection voltage input

SCL

I2C Clock Input

SDA

I2C Data Input

Exposed Thermal Pad (EP); must be connected to GND

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