TCN75AVUA Microchip Technology, TCN75AVUA Datasheet - Page 14

• Manufacturer Part Number: TCN75AVUA
• Description: IC TEMP SENSOR SRL 2.7V 8SMOP
• Manufacturer: Microchip Technology

Specifications of TCN75AVUA

• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Output Type: I²C™
• 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: 2-Wire, I2C
• Digital Output - Number Of Bits: 9 bit to 12 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 500 uA
• Ic Output Type: Voltage
• Sensing Accuracy Range: ± 1°C
• Temperature Sensing Range: -40°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Resolution (bits): 12bit
• Rohs Compliant: Yes
• Sensor Case Style: MSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

TCN75A
5.3
The
user-accessible. These registers are specified as the
Ambient Temperature (T
Limit-set (T
(T
register.
The Ambient Temperature register is a read-only
register and is used to access the ambient temperature
data. The data from the ADC is loaded in parallel in the
register. The Temperature Limit-set and Temperature
Hysteresis registers are read/write registers that
provide user-programmable temperature limits. If the
ambient temperature drifts beyond the programmed
limits, the TCN75A outputs an alert signal using the
ALERT pin (refer to
Configuration”). The device Configuration register
provides access for the user to configure the TCN75A’s
various features. These registers are described in
further detail in the following sections.
The registers are accessed by sending Register Point-
ers to the TCN75A using the serial interface. This is an
8-bit pointer. However, the two Least Significant bits
(LSbs) are used as pointers and all other bits need to
be cleared <0>. This device has additional registers
that are reserved for test and calibration. If these
registers are accessed, the device may not perform
according to the specification. The pointer description
is shown below.
REGISTER 5-1:
DS21935D-page 14
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-2
bit 1-0
.
HYST
U-0
TCN75A
) register and device Configuration (CONFIG)
0
Registers
SET
) register, the Temperature Hysteresis
Unimplemented: Read as ‘0’
Pointer bits
00 = Temperature register (T
01 = Configuration register (CONFIG)
10 = Temperature Hysteresis register (T
11 = Temperature Limit-set register (T
has
Section 5.3.4.3 “ALERT Output
U-0
0
REGISTER POINTER
A
four
) register, the Temperature
W = Writable bit
‘1’ = Bit is set
registers
U-0
0
that
A
)
U-0
are
0
SET
HYST
)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
)
FIGURE 5-2:
U-0
0
Configuration
Temperature
Register
Register
Register
Register
T
T
HYST
SET
Alert Comp/Int
Fault Queue
Alert Polarity
Resolution
Shutdown
One-Shot
U-0
0
Register Block Diagram.
 2010 Microchip Technology Inc.
ALERT Output
Control Logic
x = Bit is unknown
R/W-0
P1
R/W-0
ALERT
Output
P0
bit 0