MCP9804-ESLASHMS datasheet(11/54 Pages) MICROCHIP

11 / 54 page

DS22203A-page 11

MCP9804

3.0

PIN DESCRIPTION

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

3.1

Address Pins (A0, A1, A2)

These pins are device address input pins.

The address pins correspond to the Least Significant

bits (LSb) of address bits. The Most Significant bits

(MSb) (A6, A5, A4, A3). This is shown in Table 3-2.

3.2

Ground Pin (GND)

The GND pin is the system ground pin.

3.3

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).

3.4

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).

3.5

Temperature Alert, Open-Drain

Output (Alert)

The MCP9804 temperature alert output pin is an

open-drain output. The device outputs a signal when

the

ambient

temperature

goes

beyond

the

user-programmed

temperature

limit.

(See

Section 5.2.3).

3.6

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.

3.7

Exposed Thermal Pad (EP)

There is an internal electrical connection between the

Exposed Thermal Pad (EP) and the GND pin. The EP

may be connected to the system ground on the Printed

Circuit Board (PCB).

TABLE 3-1:

PIN FUNCTION TABLE

DFN

MSOP

Symbol

Pin Function

SDA

Serial Data Line

SCL

Serial Clock Line

Alert

Temperature Alert Output

GND

Ground

Slave Address

VDD

Power Pin

—

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

TABLE 3-2:

MCP9804 ADDRESS BYTE

Device

Address Code

Slave

Address

A6 A5 A4 A3 A2 A1 A0

MCP9804

X(1)

MCP9804(2)

Note 1: User-selectable address is shown by X.

A2,

and

must

match

the

corresponding device pin configuration.

2: Contact Factory for this Address Code.

MCP9804-E/MS データシート(PDF) 11 Page - Microchip Technology

MCP9804-E/MS データシート(HTML) 11 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

データシートダウンロード