MCP9805T-BE/ST Microchip Technology, MCP9805T-BE/ST Datasheet - Page 12

• Manufacturer Part Number: MCP9805T-BE/ST
• Description: IC,TEMPERATURE SENSOR,TSSOP,8PIN,PLASTIC
• Manufacturer: Microchip Technology

Specifications of MCP9805T-BE/ST

• Rohs Compliant: YES
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Temperature Threshold: Programmable
• Full Temp Accuracy: 3 C
• Digital Output - Bus Interface: I2C, SMBus
• Digital Output - Number Of Bits: 10 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 20 C
• Supply Current: 500 uA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MCP9805
REGISTER 4-3:
DS21977B-page 12
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
.
Upper-Half:
bit 15
Legend:
R = Readable bit
- n = Value at POR
U-0
—
T
0 = Unlocked. T
1 = Locked. T
When enabled, this bit remains set ‘1’ or locked until cleared by internal reset (Section 4.3 “Summary of
Power-up Default”). This bit does not require a double-write.
Interrupt Clear (Int. Clear) bit:
0 = No effect. (power-up default)
1 = Clear interrupt output. When read this bit returns ‘0’.
Event Output Status (Event Stat.) bit:
0 = Event output is not asserted by the device. (power-up default)
1 = Event output is asserted as a comparator/interrupt or critical temperature output.
Event Output Control (Event Cnt.) bit:
0 = Disabled. (power-up default)
1 = Enabled.
This bit can not be altered when either of the lock bits is set (bit 6 and bit 7).
Event Output Select (Event Sel.) bit:
0 = Event output for T
1 = T
When the Alarm Window Lock bit is set ‘1’ (bit 6), this bit cannot be altered until unlocked.
Event Output Polarity (Event Pol.) bit:
0 = Active-low. (power-up default)
1 = Active-high.
This bit cannot be altered when either of the lock bits is set (bit 6 and bit 7).
Event Output Mode (Event Mod.) bit:
0 = Comparator output. (power-up default)
1 = Interrupt output.
This bit cannot be altered when either of the lock bits is set (bit 6 and bit 7).
UPPER
A
U-0
—
Lower-Half:
bit 7
and T
Crit. Lock
T
R/W-0
CRIT
CONFIGURATION REGISTER (CONFIG)
(CONTINUED)
LOWER
UPPER
only. (T
UPPER
U-0
—
Win. Lock
and T
Boundary Window Lock (Win. Lock) bit:
UPPER
R/W-0
UPPER
and T
W = Writable bit
‘1’ = Bit is set
LOWER
, T
LOWER
and T
LOWER
U-0
—
registers cannot be written.
Int. Clear
LOWER
R/W-0
registers can be written. (power-up default)
and T
temperature boundaries are disabled.)
CRIT
U-0
—
Event Stat. Event Cnt.
. (power-up default)
R-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
T
R/W-0
ADDRESS ‘0000 0001’b
HYST
R/W-0
R/W-0
Event
Sel.
© 2005 Microchip Technology Inc.
x = Bit is unknown
R/W-0
SHDN
bit 8
R/W-0
Event
Pol.
R/W-0
Event
Mod.
bit 0