MCP9509HT-E/OT Microchip Technology, MCP9509HT-E/OT Datasheet - Page 12

• Manufacturer Part Number: MCP9509HT-E/OT
• Description: IC TEMP SWITCH OD 125C SOT23-5
• Manufacturer: Microchip Technology

Specifications of MCP9509HT-E/OT

• Sensing Temperature: -40°C ~ 125°C
• Output Type: Open Drain
• Voltage - Supply: 2.7 V ~ 5.5 V
• Accuracy: ±0.5°C
• Package / Case: SC-74A, SOT-753
• Ic Output Type: Open Drain
• Sensing Accuracy Range: ± 0.5°C
• Supply Current: 30µA
• Supply Voltage Range: 2.7V To 5.5V
• Sensor Case Style: SOT-23
• No. Of Pins: 5
• Termination Type: SMD
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Temperature Sensing Range: -40°C To +125°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCP9509HT-E/OTTR

MCP9509/10
4.4
MCP9509/10 is available with Hot (H) and Cold (C)
options. The MCP9509/10 Hot option detects rising
temperature while the Cold option detects falling tem-
perature. The output of the Hot option asserts when
temperature rises above T
temperature falls below T
option asserts when temperature falls below T
de-asserts when temperature rises above T
For example, if T
(Active-Low Configuration, HYST = V
asserts Low when temperature is greater than
100°C ± T
temperature is below 90°C. For the Cold option, output
asserts
100°C ± T
greater than 110°C. This operation is shown graphically
in
4.5
The relation between the user selectable external
resistor R
is described as shown in EQUATION 4-1: “T
R
conversion”. The equation coeffcients vary depending
on the device output options, H or C.
the corresponding coefficients.
TABLE 4-1:
DS22114A-page 12
set
Coef.
C
C
C
Figure
C
C
C
R
R
R
T
T
R1
R2
R3
T1
T2
T3
1
2
1
2
3
conversion” and EQUATION 4-2: “R
Sensor Hot/Cold Options
R
4-4.
SET
MCP9509/10H
Low
ACY
ACY
SET
-0.8648
-1.1564
-20.00
. The output de-asserts High when
, and de-asserts when temperature is
and the output trigger threshold limit T
3.355
4.136
145.5
-9.84
94.1
2.77
vs. Temperature
when
COEFFICIENTS/VARIABLES
SET
125.0
-40.0
temperature
HYST
MCP9509/10C
= 100°C for Hot option
SET
-0.8610
-1.1617
-10.00
. The output of the Cold
3.345
4.179
146.3
-19.7
95.1
4.25
and de-asserts when
Table 4-1
is
DD
10
10
10
10
less
SET
HYST
), output
-6
-3
kΩ/°C
-6
-3
°C/kΩ
Units
SET
kΩ/°C
kΩ/°C
°C/kΩ
°C/kΩ
kΩ
kΩ
kΩ
°C
°C
SET
to T
shows
.
than
and
SET
set
3
2
3
2
to
EQUATION 4-1:
EQUATION 4-2:
The equations can be used to determine the external
resistance value for a specified temperature threshold
or threshold value for a specified resistance.
and
to easily identify the T
Cold options.
Where:
Where:
T
SET
Table 4-3
C
C
R
R
R1,2,3
C1,2,3
SET
1,2,3
T
=
R
1,2
T
C
C
2
C
1
=
T1
T2
T3
C
C
C
(
(
(
show a look-up table which can be used
R
R
R
R1
R2
R3
=
=
=
=
=
=
SET
SET
SET
T
(
(
T
T
SET
SET
SET
–
–
–
R
R
SET
1st, 2nd and 3rd order
Temperature to Resistance
Conversion Coefficients
(Table
Resistance
Temperature
R
1st, 2nd and 3rd order
Resistance to Temperature
Conversion Coefficients
(Table
Resistance
Temperature
T
CONVERSION
R
CONVERSION
(
T
1
3
2
© 2008 Microchip Technology Inc.
SET
–
–
SET
) R
) R
)
SET
(
(
T
T
+
to R
1
1
T
SET
SET
) T
)
–
TO R
4-1)
4-1)
(
TO T
1
+
T
SET
SET
R
1
–
–
) T
2
R
R
(
(Table
(Table
SET
SET
2
2
relation for Hot and
–
(Table
(Table
) +
SET
) R
T
(
2
) +
SET
–
4-1)
4-1)
T
4-1)
4-1)
2
–
) +
R
Table 4-2
3
) +