MCP9808 MICROCHIP [Microchip Technology], MCP9808 Datasheet - Page 11

• Manufacturer Part Number: MCP9808
• Manufacturer: MICROCHIP [Microchip Technology]

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
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
Communication”.)
3.2
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
3.3
The MCP9808 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
Configuration”).
3.4
The GND pin is the system ground pin.
© 2011 Microchip Technology Inc.
DFN
Section 4.0 “Serial
1
2
3
4
5
6
7
8
9
PIN DESCRIPTION
Serial Data Line (SDA)
Serial Clock Line (SCL)
Temperature Alert, Open-Drain
Output (Alert)
Ground Pin (GND)
PIN FUNCTION TABLE
MSOP
—
1
2
3
4
5
6
7
8
Section 5.2.3 “Alert Output
Communication”.)
Section 4.0 “Serial
Symbol
GND
SDA
SCL
Alert
V
EP
A2
A1
A0
DD
Table
3-1.
Serial Data Line
Serial Clock Line
Temperature Alert Output
Ground
Slave Address
Slave Address
Slave Address
Power Pin
Exposed Thermal Pad (EP); must be connected to GND
3.5
These pins are device address input pins.
The address pins correspond to the Least Significant
bits (LSbs) of the address bits and the Most Significant
bits (MSbs): A6, A5, A4, A3. This is illustrated in
Table
TABLE 3-2:
3.6
V
specified in the DC electrical specification table, is
applied on this pin.
3.7
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).
MCP9808
MCP9808
Note 1:
DD
Device
is the power pin. The operating voltage range, as
3-2.
2:
Address Pins (A0, A1, A2)
Power Pin (V
Exposed Thermal Pad (EP)
(2)
User-selectable address is shown by ‘x’.
A2, A1 and A0 must match the
corresponding device pin configuration.
Contact factory for this address code.
Pin Function
A6
MCP9808 ADDRESS BYTE
0
1
Address Code
A5
0
0
DD
A4
1
0
)
MCP9808
A3
1
1
DS25095A-page 11
x
A2
x
(1)
Address
Slave
A1
x
x
A0
x
x