TC77-3.3MCTTR Microchip Technology, TC77-3.3MCTTR Datasheet - Page 12
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TC77-3.3MCTTR
Manufacturer Part Number
TC77-3.3MCTTR
Description
IC SENSOR THERML SPI 3.3V SOT235
Manufacturer
Microchip Technology
Datasheet
1.TC77-5.0MCTTR.pdf
(22 pages)
Specifications of TC77-3.3MCTTR
Package / Case
SOT-23-5, SC-74A, SOT-25
Output Type
MICROWIRE™, SPI™
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
No
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Full Temp Accuracy
3 C
Digital Output - Bus Interface
MICROWIRE, SPI
Digital Output - Number Of Bits
12 bit
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Description/function
Outputs Temperature as a 13-Bit Digital Word
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Supply Current
400 uA
Ic Output Type
Digital
Sensing Accuracy Range
± 1°C
Temperature Sensing Range
-55°C To +125°C
Supply Voltage Range
2.7V To 5.5V
Resolution (bits)
13bit
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
TC77DM-PICTL - BOARD DEMO PICTAIL TC77
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
TC77-3.3MCTTR
TC77-3.3MCTTRTR
TC77-3.3MCTTRTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TC77-3.3MCTTR
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
TC77
5.0
APPLICATION INFORMATION
The TC77 does not require any additional components
in order to measure temperature. However, it is recom-
mended that a decoupling capacitor of 0.1 µF to 1 µF
be provided between the V
and V
(Ground) pins (a
DD
SS
high frequency ceramic capacitor should be used). It is
necessary for the capacitor to be located as close as
possible to the integrated circuit (IC) power pins in
order to provide effective noise protection to the TC77.
The TC77 measures temperature by monitoring the
voltage of a diode located on the IC die. A low-imped-
ance thermal path between the die and the printed cir-
cuit board (PCB) is provided by the IC pins of the TC77.
Therefore, the TC77 effectively monitors the tempera-
ture of the PCB board. The thermal path between the
ambient air is not as efficient because the plastic IC
housing package functions as a thermal insulator.
Thus, the ambient air temperature (assuming that a
large temperature gradient exists between the air and
PCB) has only a small effect on the temperature
measured by the TC77.
A potential for self-heating errors can exist if the TC77
SPI communication lines are heavily loaded. Typically,
the self-heating error is negligible because of the rela-
tively small current consumption of the TC77. A tem-
perature accuracy error of approximately 0.5°C will
result from self-heating if the SPI communication pins
sink/source the maximum current specified for the
TC77. Therefore, to maximize the temperature accu-
racy, the output loading of the SPI signals should be
minimized.
DS20092A-page 12
2002 Microchip Technology Inc.