MCP9801-M/MSG Microchip Technology, MCP9801-M/MSG Datasheet - Page 18

• Manufacturer Part Number: MCP9801-M/MSG
• Description: IC SENSOR THERMAL 2.7V 8MSOP
• Manufacturer: Microchip Technology

Specifications of MCP9801-M/MSG

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Temperature Threshold: Programmable
• Full Temp Accuracy: 3 C
• Digital Output - Bus Interface: I2C, SMBus
• Digital Output - Number Of Bits: 9 bit to 12 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Description/function: Lead Free Package Analog
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 400 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP9800/1/2/3
5.3.2
The
Configuration register that allows the user to select the
different features. These features include shutdown,
ALERT output select as comparator or interrupt output,
ALERT output polarity, fault queue cycle, temperature
measurement resolution and One-shot mode (single
conversion while in shutdown). These functions are
described in detail in the following sections.
REGISTER 5-3:
DS21909D-page 18
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 5-6
bit 3-4
bit 2
bit 1
bit 0
One-Shot
R/W-0
MCP9800/1/2/3
SENSOR CONFIGURATION
REGISTER (CONFIG)
ONE-SHOT bit
1 = Enabled
0 = Disabled (Power-up default)
 ADC RESOLUTION bits
00 = 9 bit or 0.5°C (Power-up default)
01 = 10 bit or 0.25°C
10 = 11 bit or 0.125°C
11 = 12 bit or 0.0625°C
FAULT QUEUE bits
00 = 1 (Power-up default)
01 = 2
10 = 4
11 = 6
ALERT POLARITY bit
1 = Active-high
0 = Active-low (Power-up default)
COMP/INT bit
1 = Interrupt mode
0 = Comparator mode (Power-up default)
SHUTDOWN bit
1 = Enable
0 = Disable (Power-up default)
R/W-0
CONFIGURATION REGISTER (CONFIG) – ADDRESS <
Resolution
has
W = Writable bit
‘1’ = Bit is set
an
R/W-0
8-bit
read/write
R/W-0
Fault Queue
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
Polarity
ALERT
R/W-0
0000 0001
 2010 Microchip Technology Inc.
x = Bit is unknown
COMP/INT
R/W-0
>b
Shutdown
R/W-0
bit 0