MCP9800A0T-M/OT Microchip Technology, MCP9800A0T-M/OT Datasheet - Page 11

• Manufacturer Part Number: MCP9800A0T-M/OT
• Description: IC SENSOR THERMAL 2.7V SOT235
• Manufacturer: Microchip Technology

Specifications of MCP9800A0T-M/OT

• Package / Case: SOT-23-5, SC-74A, SOT-25
• Output Type: I²C™/SMBus™
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• 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: High Accuracy 12-bit Serial Input/Output, Thermal Monitors
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 400 uA
• Ic Output Type: Voltage
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -55°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Resolution (bits): 12bit
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP9800DM-TS1 - DEMO BOARD TEMP SENSOR MCP9800
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MCP9800A0T-M/OTTR

4.3.2
The MCP9800/1/2/3 has a 16-bit read/write Tempera-
ture Limit-Set register (T
in two’s compliment format. This data represents a
maximum temperature limit. If the ambient temperature
exceeds this specified limit, the MCP9800/1/2/3 asserts
an alert output. (Refer to Section 4.3.4.3 “ALERT Out-
put Configuration”).
This register uses the nine Most Significant bits (MSb)
and all other bits are don’t cares.
The power-up default value of T
<0 1010 0000> in binary.
REGISTER 4-3:
 2004 Microchip Technology Inc.
Upper Half:
bit 15
Legend:
R = Readable bit
- n = Value at POR
R/W-0
Sign
TEMPERATURE LIMIT-SET
REGISTER (T
2
R/W-0
6
°C/bit
Lower Half:
bit 7
2
R/W-0
-1
TEMPERATURE LIMIT-SET REGISTER (T
°C/bit
SET
) which contains a 9-bit data
SET
2
R/W-0
5
°C/bit
)
SET
R-0
register is 80°C
W = Writable bit
‘1’ = Bit is set
0
2
R/W-0
4
°C/bit
R-0
0
2
R/W-0
3
°C/bit
R-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
0
2
R/W-0
2
°C/bit
SET
R-0
)
0
2
R/W-0
1
MCP9800/1/2/3
°C/bit
R-0
0
2
x = Bit is unknown
R/W-0
0
°C/bit
bit 8
R-0
0
DS21909B-page 11
R-0
0
bit 0