MCP9800A0-M/MS MICROCHIP [Microchip Technology], MCP9800A0-M/MS Datasheet - Page 9

• Manufacturer Part Number: MCP9800A0-M/MS
• Description: 2-Wire High-Accuracy Temperature Sensor
• Manufacturer: MICROCHIP [Microchip Technology]

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
The SDA is a bidirectional input/output pin, used to
serially transmit data to and from the host controller.
This pin requires a pull-up resistor to output data.
3.2
The SCLK is a clock input pin. All communication and
timing is relative to the signal on this pin. The clock is
generated by the host controller on the bus.
3.3
The V
specified in the DC electrical specification table, is
applied on this pin.
3.4
The GND pin is the system ground pin.
 2010 Microchip Technology Inc.
MCP9800
MCP9802
SOT-23-5
DD
PIN DESCRIPTION
Serial Data Pin (SDA)
Serial Clock Pin (SCLK)
Power Supply Input (V
pin is the power pin. The operating voltage, as
Ground (GND)
—
—
—
5
4
3
2
1
PIN FUNCTION TABLE
MSOP, SOIC
MCP9801
MCP9803
1
2
3
4
5
6
7
8
DD
Table
)
3-1.
Symbol
ALERT
SCLK
GND
SDA
V
A2
A1
A0
DD
Bidirectional Serial Data
Serial Clock Input
Temperature Alert Output
Ground
Address Select Pin (bit 2)
Address Select Pin (bit 1)
Address Select Pin (bit 0)
Power Supply Input
3.5
The MCP9800/1/2/3’s ALERT pin is an open-drain
output pin. The device outputs an alert signal when the
ambient
user-programmed temperature limit.
3.6
These pins are device or slave address input pins and
are available only with the MCP9801/03. The device
addresses for the MCP9800/02 are factory-set.
The address pins are the Least Significant bits (LSb) of
the device address bits. The Most Significant bits
(MSb) (A6, A5, A4, A3) are factory-set to <1001>. This
is illustrated in
TABLE 3-2:
MCP9801/03
MCP9800/02A0
MCP9800/02A5
Note:
Device
ALERT Output
Address Pins (A2, A1, A0)
User-selectable address is shown by X.
temperature
Table
MCP9800/1/2/3
SLAVE ADDRESS
A6
1
1
1
3-2.
Function
A5
0
0
0
A4
goes
0
0
0
A3
1
1
1
DS21909C-page 9
beyond
A2
0
1
X
A1
0
0
X
A0
0
1
X
the