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© 2008 Microchip Technology Inc. DS22114A-page 1
MCP9509/10
Features
• Resistor-Programmable Temperature Switch
• Wide Operating Voltage Range: 2.7V to 5.5V
• Low Supply Current: 30 µA (typical)
• Temperature Switch Accuracy:
- ±0.5°C (typical) at +25°C, +45°C
- ±1°C (typical) 0°C to +70°C
- ±3.5°C (maximum) 0°C to +125°C
- ±4.5°C (maximum) -20°C to +125°C
- ±2°C (typical) -40°C to +125°C
• Sensor Options available:
- Switch for rising temperature: Cold
to Hot (H)
- Switch for falling temperature: Hot
to Cold (C)
• Output Configurations:
- Open-Drain:
– External Pull-up Resistor: MCP9509
– Internal Pull-up Resistor: MCP9510
- Active-Low, Push-Pull: MCP9510
- Active-High, Push-Pull: MCP9510
• User Selectable Hysteresis: 2°C or 10°C (typical)
• Space-Saving SOT-23-5, SOT-23-6 Packages
Applications
• Power Supply Thermal Shutdown
• Temperature Alarm
• Thermostat Control
• Fan Control
• Base-Stations
• Automotive
Typical Performance
Description
Microchip Technology’s MCP9509/10 devices are pro-
grammable logic output temperature switches. The
temperature switch threshold can be programmed with
a single external resistor, which provides high design
flexibility and simplicity. In addition, this family of
devices provide user programmable features such as
2°C and 10°C (typical) switch hysteresis and output
structure configuration. The MCP9509 provides an
open drain output, whereas the MCP9510 is offered in
three different user selectable output configurations:
Active-low/Active-high push pull and Active-Low
Open-Drain output with an internal 100 kΩ pull-up
resistor.
The MCP9509/10 operate from 2.7V to 5.5V. This
family is capable of triggering for temperatures -40°C to
+125°C with high accuracy.
Package Types
0%
4%
8%
12%
16%
20%
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
Temperature Accuracy (°C)
Occurrences
T
A
= +45°C
V
DD
= 4.1V
9087 Units
6 Lots
4
1
2
3
5
GND
OUT
SOT-23-5
MCP9509
SET
V
DD
HYST
4
1
2
3
6
GND
OUT
/ OUT
SOT-23-6
MCP9510
SET
V
DD
HYST
5
OUTSET
Resistor-Programmable Temperature Switches
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