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MCP9509/10
3.0
PIN DESCRIPTIONS
TABLE 3-1:
PIN FUNCTION TABLE
MCP9509
SOT-23-5
1
2
3
—
4
MCP9510
SOT-23-6
1
2
—
3
4
Symbol
SET
GND
OUT
OUT ,
OUT
HYS
Description
External Trip Temperature Resistor (R SET ) input
Ground
Open-drain output
Selectable Output pin,
function set by OUTSET pin
Hysteresis Input
HYS = GND, hysteresis is 2°C
HYS = V DD , hysteresis is 10°C
5
6
V DD
Power pin
—
5
OUTSET Output Control
OUTSET = GND, Active-Low, Push-Pull
OUTSET = V DD , Active-High, Push-Pull
OUTSET = Unconnected, Active-Low, Open-Drain with an internal pull-up
3.1
External Resistor Input (SET)
3.5
Open-Drain Output (OUT)
This pin is used to connect a resistor between the SET
and GND pins to select the temperature trip point
(T SET ). The resistor value can be determined either
from Equation 4-2 or the lookup table shown in
Table 4-2 .
(MCP9509)
This output is triggered when temperature exceeds the
programmed trip temperature. This pin requires a
pull-up resistor.
3.2
Ground (GND)
3.6
Selectable Output (OUT, OUT)
(MCP9510)
The GND pin is the system ground pin.
The output pin can be configured as either a Push-Pull
3.3
Hysteresis Input (HYS)
Active-High, Push-Pull Active-Low, or an Open-drain
Output with an internal pull-up resistor. The three
This is an input pin which can be connected to V DD or
GND to select output hysteresis. Either 2°C
output options of the MCP9510 are selected by the
OUTSET pin.
(HYS = GND) or 10°C (HYS = V DD ) of hysteresis can
be selected.
3.7
Output Control (OUTSET)
(MCP9510)
3.4
Power Pin (V DD )
The OUTSET pin is used to select the desired
The operating voltage range, as specified in the DC
configuration of the OUT or OUT pin.
electrical specification table, is applied on this pin.
TABLE 3-1:
OUTSET SELECTABLE
OUTPUTS
? 2008 Microchip Technology Inc.
OUTSET Pin
GND
V DD
unconnected
(i.e. open)
OUT / OUT Pin
Push-Pull, Active-Low
Push-Pull, Active-High
Open-Drain output with an
internal pull-up resistor of
100 k Ω (typical)
DS22114A-page 9
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