TC670
DS21688C-page 2
?2003 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings
V
DD
...................................................................................6.0V
All Inputs and Outputs. ............(GND 0.3V) to (V
DD
+ 0.3V)
Output Short-Circuit Current .................................continuous
Current at Input Pin ................................................... +/-2 mA
Current at Output Pin .............................................. +/-25 mA
Junction Temperature, T
J
.............................................150癈
ESD protection on all pins..................................................e 4 kV
Operating Temperature Range........................-40癈 to +85癈
Storage Temperature Range.........................-55癈 to +150癈
Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operation listings of this specification is not implied. Exposure
to maximum rating conditions for extended periods may affect
device reliability.
TABLE 1-1:
PIN FUNCTION TABLE
DC CHARACTERISTICS
Symbol
Description
THRESHOLD Analog Input
GND
Ground Terminal
CLEAR
Digital Input
VDD
Bias Supply Input
ALERT
Digital (Open-Drain) Output
SENSE
Analog Input
Electrical Specifications: Unless otherwise specified, all limits are specified at +25?/SPAN>C, V
DD
= 3.0V to 5.5V,
CLEAR = Low. Boldface type specifications apply for temperature range of -40癈 to +85癈.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Power Supply
Supply Voltage
V
DD
3.0
5.5
V
Supply Current
I
DD
90
150
礎
CLEAR Input
Logic Input High Level
V
IH
0.8V
DD
V
Logic Input Low Level
V
IL
0.2V
DD
V
SENSE Input
Input Level Threshold Voltage
V
TH(SENSE)
124
mV
Input Resistance
R
SENSE
50
k&
THRESHOLD Input
Input Voltage Minimum
0.0
V
Input Voltage Maximum
2.4
V
Input Resistance
100
M&
Programmed Fan Speed Alert Accuracy
(Note 1)
ALERT
ACC
-10
+10
%
V
DD
= 3.0V
ALERT
Output
Output Low Voltage
V
LOW
0.3
V
I
SINK
= 2.5 mA
Output Delay Time
t
DELAY
176
ms
Temperature Ranges
Specified Temperature Range
T
A
-40
+85
癈
Operating Temperature Range
T
A
-40
+125
癈
Thermal Package Resistances
Thermal Resistance, 6L-SOT-23
?/DIV>
JA
230
癈/W
Note 1: The TC670 will operate properly over the entire power supply range of 3.0V to 5.5V. As V
DD
varies from
3.0V, accuracy will degrade based on the percentage of V
DD
, as shown in Section 2.0, Typical
Performance Curves .
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